From 11c7cd5495903c42398b2a0e87520a6fbf55a638 Mon Sep 17 00:00:00 2001
From: Vaibhav Rai <raivaibhav08@gmail.com>
Date: Mon, 22 Apr 2024 17:16:42 +0530
Subject: [PATCH 01/18] Feat: Add read-only binding focused (#11271)

* Feat: Add readonly binding focused

* prettier

* simplify test

* revert

* simplify implementation

* changeset

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>
Co-authored-by: Rich Harris <hello@rich-harris.dev>
---
 .changeset/thick-swans-type.md                |  5 +++++
 .../3-transform/client/visitors/template.js   |  4 +++-
 .../svelte/src/compiler/phases/bindings.js    |  1 +
 .../client/dom/elements/bindings/universal.js | 12 ++++++++++++
 packages/svelte/src/internal/client/index.js  |  6 +++++-
 .../samples/binding-focused/_config.js        | 19 +++++++++++++++++++
 .../samples/binding-focused/main.svelte       |  7 +++++++
 7 files changed, 52 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/thick-swans-type.md
 create mode 100644 packages/svelte/tests/runtime-legacy/samples/binding-focused/_config.js
 create mode 100644 packages/svelte/tests/runtime-legacy/samples/binding-focused/main.svelte

diff --git a/.changeset/thick-swans-type.md b/.changeset/thick-swans-type.md
new file mode 100644
index 0000000000..430cdbdc5b
--- /dev/null
+++ b/.changeset/thick-swans-type.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+feat: add read-only `bind:focused`
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
index fa711c324f..e9d3b519c7 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
@@ -2727,7 +2727,9 @@ export const template_visitors = {
 				case 'checked':
 					call_expr = b.call(`$.bind_checked`, state.node, getter, setter);
 					break;
-
+				case 'focused':
+					call_expr = b.call(`$.bind_focused`, state.node, setter);
+					break;
 				case 'group': {
 					/** @type {import('estree').CallExpression[]} */
 					const indexes = [];
diff --git a/packages/svelte/src/compiler/phases/bindings.js b/packages/svelte/src/compiler/phases/bindings.js
index e3fdd7eb8c..9a6f1c316b 100644
--- a/packages/svelte/src/compiler/phases/bindings.js
+++ b/packages/svelte/src/compiler/phases/bindings.js
@@ -21,6 +21,7 @@ export const binding_properties = {
 		event: 'durationchange',
 		omit_in_ssr: true
 	},
+	focused: {},
 	paused: {
 		valid_elements: ['audio', 'video'],
 		omit_in_ssr: true
diff --git a/packages/svelte/src/internal/client/dom/elements/bindings/universal.js b/packages/svelte/src/internal/client/dom/elements/bindings/universal.js
index 8c40c04da5..f42f67d594 100644
--- a/packages/svelte/src/internal/client/dom/elements/bindings/universal.js
+++ b/packages/svelte/src/internal/client/dom/elements/bindings/universal.js
@@ -1,4 +1,5 @@
 import { render_effect } from '../../../reactivity/effects.js';
+import { listen } from './shared.js';
 
 /**
  * @param {'innerHTML' | 'textContent' | 'innerText'} property
@@ -67,3 +68,14 @@ export function bind_property(property, event_name, type, element, get_value, up
 		}
 	});
 }
+
+/**
+ * @param {HTMLElement} element
+ * @param {(value: unknown) => void} update
+ * @returns {void}
+ */
+export function bind_focused(element, update) {
+	listen(element, ['focus', 'blur'], () => {
+		update(element === document.activeElement);
+	});
+}
diff --git a/packages/svelte/src/internal/client/index.js b/packages/svelte/src/internal/client/index.js
index 2362698ab1..6e6488c001 100644
--- a/packages/svelte/src/internal/client/index.js
+++ b/packages/svelte/src/internal/client/index.js
@@ -44,7 +44,11 @@ export { bind_prop } from './dom/elements/bindings/props.js';
 export { bind_select_value, init_select, select_option } from './dom/elements/bindings/select.js';
 export { bind_element_size, bind_resize_observer } from './dom/elements/bindings/size.js';
 export { bind_this } from './dom/elements/bindings/this.js';
-export { bind_content_editable, bind_property } from './dom/elements/bindings/universal.js';
+export {
+	bind_content_editable,
+	bind_property,
+	bind_focused
+} from './dom/elements/bindings/universal.js';
 export { bind_window_scroll, bind_window_size } from './dom/elements/bindings/window.js';
 export {
 	once,
diff --git a/packages/svelte/tests/runtime-legacy/samples/binding-focused/_config.js b/packages/svelte/tests/runtime-legacy/samples/binding-focused/_config.js
new file mode 100644
index 0000000000..02f2574f34
--- /dev/null
+++ b/packages/svelte/tests/runtime-legacy/samples/binding-focused/_config.js
@@ -0,0 +1,19 @@
+import { flushSync } from 'svelte';
+
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, component, target, window }) {
+		const [in1, in2] = target.querySelectorAll('input');
+
+		flushSync(() => in1.focus());
+		assert.equal(window.document.activeElement, in1);
+		assert.equal(component.a, true);
+		assert.equal(component.b, false);
+
+		flushSync(() => in2.focus());
+		assert.equal(window.document.activeElement, in2);
+		assert.equal(component.a, false);
+		assert.equal(component.b, true);
+	}
+});
diff --git a/packages/svelte/tests/runtime-legacy/samples/binding-focused/main.svelte b/packages/svelte/tests/runtime-legacy/samples/binding-focused/main.svelte
new file mode 100644
index 0000000000..7ba892393d
--- /dev/null
+++ b/packages/svelte/tests/runtime-legacy/samples/binding-focused/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	export let a;
+	export let b;
+</script>
+
+<input bind:focused={a} />
+<input bind:focused={b} />

From 9721d5641b48e4247c87132695f1ca2f2119e0d8 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 07:48:50 -0400
Subject: [PATCH 02/18] feat: implement `:global {...}` CSS blocks (#11276)

* feat: implement `:global {...}` CSS blocks

* tests for compiler errors

* regenerate types

* lint
---
 .changeset/small-apples-eat.md                |  5 +++
 packages/svelte/src/compiler/errors.js        |  9 ++++
 .../src/compiler/phases/1-parse/read/style.js |  6 +--
 .../phases/2-analyze/css/css-analyze.js       | 44 +++++++++++++++++++
 .../phases/2-analyze/css/css-prune.js         |  8 +++-
 .../compiler/phases/2-analyze/css/css-warn.js |  7 +++
 .../compiler/phases/3-transform/css/index.js  | 26 ++++++++++-
 packages/svelte/src/compiler/types/css.d.ts   |  1 +
 .../css-global-block-combinator/_config.js    |  9 ++++
 .../main.svelte                               |  2 +-
 .../css-global-block-declaration/_config.js   |  9 ++++
 .../css-global-block-declaration/main.svelte  |  5 +++
 .../css-global-block-modifier/_config.js      |  9 ++++
 .../css-global-block-modifier/main.svelte     |  3 ++
 .../css-global-block-multiple/_config.js      |  9 ++++
 .../css-global-block-multiple/main.svelte     |  3 ++
 .../css-global-without-selector/_config.js    |  9 ----
 .../tests/css/samples/global-block/_config.js | 21 +++++++++
 .../css/samples/global-block/expected.css     | 17 +++++++
 .../css/samples/global-block/input.svelte     | 21 +++++++++
 packages/svelte/types/index.d.ts              |  1 +
 21 files changed, 208 insertions(+), 16 deletions(-)
 create mode 100644 .changeset/small-apples-eat.md
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js
 rename packages/svelte/tests/compiler-errors/samples/{css-global-without-selector => css-global-block-combinator}/main.svelte (50%)
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/main.svelte
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/main.svelte
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js
 create mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/main.svelte
 delete mode 100644 packages/svelte/tests/compiler-errors/samples/css-global-without-selector/_config.js
 create mode 100644 packages/svelte/tests/css/samples/global-block/_config.js
 create mode 100644 packages/svelte/tests/css/samples/global-block/expected.css
 create mode 100644 packages/svelte/tests/css/samples/global-block/input.svelte

diff --git a/.changeset/small-apples-eat.md b/.changeset/small-apples-eat.md
new file mode 100644
index 0000000000..baa6396bb6
--- /dev/null
+++ b/.changeset/small-apples-eat.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+feat: implement `:global {...}` CSS blocks
diff --git a/packages/svelte/src/compiler/errors.js b/packages/svelte/src/compiler/errors.js
index ab0a17497e..71bc353336 100644
--- a/packages/svelte/src/compiler/errors.js
+++ b/packages/svelte/src/compiler/errors.js
@@ -103,6 +103,15 @@ const css = {
 	/** @param {string} message */
 	'css-parse-error': (message) => message,
 	'invalid-css-empty-declaration': () => `Declaration cannot be empty`,
+	'invalid-css-global-block-list': () =>
+		`A :global {...} block cannot be part of a selector list with more than one item`,
+	'invalid-css-global-block-modifier': () =>
+		`A :global {...} block cannot modify an existing selector`,
+	/** @param {string} name */
+	'invalid-css-global-block-combinator': (name) =>
+		`A :global {...} block cannot follow a ${name} combinator`,
+	'invalid-css-global-block-declaration': () =>
+		`A :global {...} block can only contain rules, not declarations`,
 	'invalid-css-global-placement': () =>
 		`:global(...) can be at the start or end of a selector sequence, but not in the middle`,
 	'invalid-css-global-selector': () => `:global(...) must contain exactly one selector`,
diff --git a/packages/svelte/src/compiler/phases/1-parse/read/style.js b/packages/svelte/src/compiler/phases/1-parse/read/style.js
index ef64a97953..8ec00daff1 100644
--- a/packages/svelte/src/compiler/phases/1-parse/read/style.js
+++ b/packages/svelte/src/compiler/phases/1-parse/read/style.js
@@ -3,7 +3,6 @@ import { error } from '../../../errors.js';
 const REGEX_MATCHER = /^[~^$*|]?=/;
 const REGEX_CLOSING_BRACKET = /[\s\]]/;
 const REGEX_ATTRIBUTE_FLAGS = /^[a-zA-Z]+/; // only `i` and `s` are valid today, but make it future-proof
-const REGEX_COMBINATOR_WHITESPACE = /^\s*(\+|~|>|\|\|)\s*/;
 const REGEX_COMBINATOR = /^(\+|~|>|\|\|)/;
 const REGEX_PERCENTAGE = /^\d+(\.\d+)?%/;
 const REGEX_NTH_OF =
@@ -116,7 +115,8 @@ function read_rule(parser) {
 		end: parser.index,
 		metadata: {
 			parent_rule: null,
-			has_local_selectors: false
+			has_local_selectors: false,
+			is_global_block: false
 		}
 	};
 }
@@ -252,8 +252,6 @@ function read_selector(parser, inside_pseudo_class = false) {
 			if (parser.eat('(')) {
 				args = read_selector_list(parser, true);
 				parser.eat(')', true);
-			} else if (name === 'global') {
-				error(parser.index, 'invalid-css-global-selector');
 			}
 
 			relative_selector.selectors.push({
diff --git a/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js b/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js
index 7b6cbff0ae..38a62b9ca7 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js
@@ -69,6 +69,17 @@ const analysis_visitors = {
 	Rule(node, context) {
 		node.metadata.parent_rule = context.state.rule;
 
+		// `:global {...}` or `div :global {...}`
+		node.metadata.is_global_block = node.prelude.children.some((selector) => {
+			const last = selector.children[selector.children.length - 1];
+
+			const s = last.selectors[last.selectors.length - 1];
+
+			if (s.type === 'PseudoClassSelector' && s.name === 'global' && s.args === null) {
+				return true;
+			}
+		});
+
 		context.next({
 			...context.state,
 			rule: node
@@ -84,6 +95,39 @@ const analysis_visitors = {
 
 /** @type {Visitors} */
 const validation_visitors = {
+	Rule(node, context) {
+		if (node.metadata.is_global_block) {
+			if (node.prelude.children.length > 1) {
+				error(node.prelude, 'invalid-css-global-block-list');
+			}
+
+			const complex_selector = node.prelude.children[0];
+			const relative_selector = complex_selector.children[complex_selector.children.length - 1];
+
+			if (relative_selector.selectors.length > 1) {
+				error(
+					relative_selector.selectors[relative_selector.selectors.length - 1],
+					'invalid-css-global-block-modifier'
+				);
+			}
+
+			if (relative_selector.combinator && relative_selector.combinator.name !== ' ') {
+				error(
+					relative_selector,
+					'invalid-css-global-block-combinator',
+					relative_selector.combinator.name
+				);
+			}
+
+			const declaration = node.block.children.find((child) => child.type === 'Declaration');
+
+			if (declaration) {
+				error(declaration, 'invalid-css-global-block-declaration');
+			}
+		}
+
+		context.next();
+	},
 	ComplexSelector(node, context) {
 		// ensure `:global(...)` is not used in the middle of a selector
 		{
diff --git a/packages/svelte/src/compiler/phases/2-analyze/css/css-prune.js b/packages/svelte/src/compiler/phases/2-analyze/css/css-prune.js
index a5010c543a..1726a4fab1 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/css/css-prune.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/css/css-prune.js
@@ -1,7 +1,6 @@
 import { walk } from 'zimmerframe';
 import { get_possible_values } from './utils.js';
 import { regex_ends_with_whitespace, regex_starts_with_whitespace } from '../../patterns.js';
-import { error } from '../../../errors.js';
 
 /**
  * @typedef {{
@@ -60,6 +59,13 @@ export function prune(stylesheet, element) {
 
 /** @type {import('zimmerframe').Visitors<import('#compiler').Css.Node, State>} */
 const visitors = {
+	Rule(node, context) {
+		if (node.metadata.is_global_block) {
+			context.visit(node.prelude);
+		} else {
+			context.next();
+		}
+	},
 	ComplexSelector(node, context) {
 		const selectors = truncate(node);
 		const inner = selectors[selectors.length - 1];
diff --git a/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js b/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
index 8d7fef873f..3aa2382205 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
@@ -30,5 +30,12 @@ const visitors = {
 		}
 
 		context.next();
+	},
+	Rule(node, context) {
+		if (node.metadata.is_global_block) {
+			context.visit(node.prelude);
+		} else {
+			context.next();
+		}
 	}
 };
diff --git a/packages/svelte/src/compiler/phases/3-transform/css/index.js b/packages/svelte/src/compiler/phases/3-transform/css/index.js
index a71d77b2aa..cb54841657 100644
--- a/packages/svelte/src/compiler/phases/3-transform/css/index.js
+++ b/packages/svelte/src/compiler/phases/3-transform/css/index.js
@@ -116,7 +116,7 @@ const visitors = {
 			}
 		}
 	},
-	Rule(node, { state, next }) {
+	Rule(node, { state, next, visit }) {
 		// keep empty rules in dev, because it's convenient to
 		// see them in devtools
 		if (!state.dev && is_empty(node)) {
@@ -134,6 +134,26 @@ const visitors = {
 			return;
 		}
 
+		if (node.metadata.is_global_block) {
+			const selector = node.prelude.children[0];
+
+			if (selector.children.length === 1) {
+				// `:global {...}`
+				state.code.prependRight(node.start, '/* ');
+				state.code.appendLeft(node.block.start + 1, '*/');
+
+				state.code.prependRight(node.block.end - 1, '/*');
+				state.code.appendLeft(node.block.end, '*/');
+
+				// don't recurse into selector or body
+				return;
+			}
+
+			// don't recurse into body
+			visit(node.prelude);
+			return;
+		}
+
 		next();
 	},
 	SelectorList(node, { state, next, path }) {
@@ -275,6 +295,10 @@ const visitors = {
 
 /** @param {import('#compiler').Css.Rule} rule */
 function is_empty(rule) {
+	if (rule.metadata.is_global_block) {
+		return rule.block.children.length === 0;
+	}
+
 	for (const child of rule.block.children) {
 		if (child.type === 'Declaration') {
 			return false;
diff --git a/packages/svelte/src/compiler/types/css.d.ts b/packages/svelte/src/compiler/types/css.d.ts
index 4bce904425..ee323ad6d1 100644
--- a/packages/svelte/src/compiler/types/css.d.ts
+++ b/packages/svelte/src/compiler/types/css.d.ts
@@ -33,6 +33,7 @@ export namespace Css {
 		metadata: {
 			parent_rule: null | Rule;
 			has_local_selectors: boolean;
+			is_global_block: boolean;
 		};
 	}
 
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js
new file mode 100644
index 0000000000..6a11aa63ec
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js
@@ -0,0 +1,9 @@
+import { test } from '../../test';
+
+export default test({
+	error: {
+		code: 'invalid-css-global-block-combinator',
+		message: 'A :global {...} block cannot follow a > combinator',
+		position: [12, 21]
+	}
+});
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-without-selector/main.svelte b/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/main.svelte
similarity index 50%
rename from packages/svelte/tests/compiler-errors/samples/css-global-without-selector/main.svelte
rename to packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/main.svelte
index a626136cfc..b3b6ebe6ac 100644
--- a/packages/svelte/tests/compiler-errors/samples/css-global-without-selector/main.svelte
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/main.svelte
@@ -1,3 +1,3 @@
 <style>
-	:global {}
+	.x > :global {}
 </style>
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js
new file mode 100644
index 0000000000..7b637ca42e
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js
@@ -0,0 +1,9 @@
+import { test } from '../../test';
+
+export default test({
+	error: {
+		code: 'invalid-css-global-block-declaration',
+		message: 'A :global {...} block can only contain rules, not declarations',
+		position: [24, 34]
+	}
+});
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/main.svelte b/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/main.svelte
new file mode 100644
index 0000000000..6a1891ca29
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/main.svelte
@@ -0,0 +1,5 @@
+<style>
+	.x :global {
+		color: red;
+	}
+</style>
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js
new file mode 100644
index 0000000000..9e7cac667f
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js
@@ -0,0 +1,9 @@
+import { test } from '../../test';
+
+export default test({
+	error: {
+		code: 'invalid-css-global-block-modifier',
+		message: 'A :global {...} block cannot modify an existing selector',
+		position: [14, 21]
+	}
+});
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/main.svelte b/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/main.svelte
new file mode 100644
index 0000000000..7d274e3894
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/main.svelte
@@ -0,0 +1,3 @@
+<style>
+	.x .y:global {}
+</style>
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js
new file mode 100644
index 0000000000..8021a9c677
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js
@@ -0,0 +1,9 @@
+import { test } from '../../test';
+
+export default test({
+	error: {
+		code: 'invalid-css-global-block-list',
+		message: 'A :global {...} block cannot be part of a selector list with more than one item',
+		position: [9, 31]
+	}
+});
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/main.svelte b/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/main.svelte
new file mode 100644
index 0000000000..75178bc664
--- /dev/null
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/main.svelte
@@ -0,0 +1,3 @@
+<style>
+	.x :global, .y :global {}
+</style>
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-without-selector/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-without-selector/_config.js
deleted file mode 100644
index 549ad3ebe2..0000000000
--- a/packages/svelte/tests/compiler-errors/samples/css-global-without-selector/_config.js
+++ /dev/null
@@ -1,9 +0,0 @@
-import { test } from '../../test';
-
-export default test({
-	error: {
-		code: 'invalid-css-global-selector',
-		message: ':global(...) must contain exactly one selector',
-		position: [16, 16]
-	}
-});
diff --git a/packages/svelte/tests/css/samples/global-block/_config.js b/packages/svelte/tests/css/samples/global-block/_config.js
new file mode 100644
index 0000000000..53b9ee318f
--- /dev/null
+++ b/packages/svelte/tests/css/samples/global-block/_config.js
@@ -0,0 +1,21 @@
+import { test } from '../../test';
+
+export default test({
+	warnings: [
+		{
+			filename: 'SvelteComponent.svelte',
+			code: 'css-unused-selector',
+			message: 'Unused CSS selector ".unused :global"',
+			start: {
+				line: 16,
+				column: 1,
+				character: 128
+			},
+			end: {
+				line: 16,
+				column: 16,
+				character: 143
+			}
+		}
+	]
+});
diff --git a/packages/svelte/tests/css/samples/global-block/expected.css b/packages/svelte/tests/css/samples/global-block/expected.css
new file mode 100644
index 0000000000..8bf0f0e596
--- /dev/null
+++ b/packages/svelte/tests/css/samples/global-block/expected.css
@@ -0,0 +1,17 @@
+	/* :global {*/
+		.x {
+			color: green;
+		}
+	/*}*/
+
+	div.svelte-xyz {
+		.y {
+			color: green;
+		}
+	}
+
+	/* (unused) .unused :global {
+		.z {
+			color: red;
+		}
+	}*/
diff --git a/packages/svelte/tests/css/samples/global-block/input.svelte b/packages/svelte/tests/css/samples/global-block/input.svelte
new file mode 100644
index 0000000000..d05a6b7edc
--- /dev/null
+++ b/packages/svelte/tests/css/samples/global-block/input.svelte
@@ -0,0 +1,21 @@
+<div>{@html whatever}</div>
+
+<style>
+	:global {
+		.x {
+			color: green;
+		}
+	}
+
+	div :global {
+		.y {
+			color: green;
+		}
+	}
+
+	.unused :global {
+		.z {
+			color: red;
+		}
+	}
+</style>
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 900bee5a76..401b569a61 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -1122,6 +1122,7 @@ declare module 'svelte/compiler' {
 			metadata: {
 				parent_rule: null | Rule;
 				has_local_selectors: boolean;
+				is_global_block: boolean;
 			};
 		}
 

From 521d124267080a1e70ba40f5e36aec648c52d99d Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 07:51:55 -0400
Subject: [PATCH 03/18] fix: allow events to continue propagating following an
 error (#11263)

* fix: allow events to continue propagating following an error

* test

* appease eslint
---
 .changeset/light-penguins-invent.md           |  5 ++
 .../internal/client/dom/elements/events.js    | 56 ++++++++++---------
 .../event-propagation-with-error/_config.js   | 15 +++++
 .../event-propagation-with-error/main.svelte  | 19 +++++++
 4 files changed, 70 insertions(+), 25 deletions(-)
 create mode 100644 .changeset/light-penguins-invent.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/main.svelte

diff --git a/.changeset/light-penguins-invent.md b/.changeset/light-penguins-invent.md
new file mode 100644
index 0000000000..2610fddf06
--- /dev/null
+++ b/.changeset/light-penguins-invent.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: allow events to continue propagating following an error
diff --git a/packages/svelte/src/internal/client/dom/elements/events.js b/packages/svelte/src/internal/client/dom/elements/events.js
index 330bcc2661..536b1c0442 100644
--- a/packages/svelte/src/internal/client/dom/elements/events.js
+++ b/packages/svelte/src/internal/client/dom/elements/events.js
@@ -122,36 +122,42 @@ export function handle_event_propagation(handler_element, event) {
 		}
 	});
 
-	while (current_target !== null) {
+	/** @param {Element} current_target */
+	function next(current_target) {
 		/** @type {null | Element} */
 		var parent_element =
 			current_target.parentNode || /** @type {any} */ (current_target).host || null;
-		var internal_prop_name = '__' + event_name;
-		// @ts-ignore
-		var delegated = current_target[internal_prop_name];
-
-		if (delegated !== undefined && !(/** @type {any} */ (current_target).disabled)) {
-			if (is_array(delegated)) {
-				var [fn, ...data] = delegated;
-				fn.apply(current_target, [event, ...data]);
-			} else {
-				delegated.call(current_target, event);
-			}
-		}
 
-		if (
-			event.cancelBubble ||
-			parent_element === handler_element ||
-			current_target === handler_element
-		) {
-			break;
+		try {
+			// @ts-expect-error
+			var delegated = current_target['__' + event_name];
+
+			if (delegated !== undefined && !(/** @type {any} */ (current_target).disabled)) {
+				if (is_array(delegated)) {
+					var [fn, ...data] = delegated;
+					fn.apply(current_target, [event, ...data]);
+				} else {
+					delegated.call(current_target, event);
+				}
+			}
+		} finally {
+			if (
+				!event.cancelBubble &&
+				parent_element !== handler_element &&
+				parent_element !== null &&
+				current_target !== handler_element
+			) {
+				next(parent_element);
+			}
 		}
-
-		current_target = parent_element;
 	}
 
-	// @ts-expect-error is used above
-	event.__root = handler_element;
-	// @ts-expect-error is used above
-	current_target = handler_element;
+	try {
+		next(current_target);
+	} finally {
+		// @ts-expect-error is used above
+		event.__root = handler_element;
+		// @ts-expect-error is used above
+		current_target = handler_element;
+	}
 }
diff --git a/packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/_config.js b/packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/_config.js
new file mode 100644
index 0000000000..d12f42f863
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/_config.js
@@ -0,0 +1,15 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	html: `<div><button>0 0</button>`,
+
+	async test({ assert, target }) {
+		const button1 = target.querySelector('button');
+
+		flushSync(() => button1?.click());
+		assert.htmlEqual(target.innerHTML, `<div><button>1 1</button></div>`);
+	},
+
+	runtime_error: 'nope'
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/main.svelte
new file mode 100644
index 0000000000..4bab336347
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/event-propagation-with-error/main.svelte
@@ -0,0 +1,19 @@
+<script>
+	let y = $state(0);
+	let n = $state(0);
+
+	function yep() {
+		y += 1;
+	}
+
+	function nope() {
+		n += 1;
+		throw new Error('nope');
+	}
+</script>
+
+<div onclick={yep}>
+	<button onclick={nope}>
+		{y} {n}
+	</button>
+</div>

From 5ef1fdf7cc2575efb07b2d1504d1c8e247942476 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 07:52:40 -0400
Subject: [PATCH 04/18] fix: run render functions for dynamic void elements
 (#11258)

* fix: run render functions for dynamic void elements

* Update packages/svelte/src/internal/client/dom/blocks/svelte-element.js
---
 .changeset/fifty-masks-give.md                     |  5 +++++
 .../internal/client/dom/blocks/svelte-element.js   | 14 ++++++--------
 .../samples/action-void-element/_config.js         | 11 +++++++++++
 .../samples/action-void-element/main.svelte        |  9 +++++++++
 4 files changed, 31 insertions(+), 8 deletions(-)
 create mode 100644 .changeset/fifty-masks-give.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/action-void-element/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/action-void-element/main.svelte

diff --git a/.changeset/fifty-masks-give.md b/.changeset/fifty-masks-give.md
new file mode 100644
index 0000000000..c555a7a34b
--- /dev/null
+++ b/.changeset/fifty-masks-give.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: run render functions for dynamic void elements
diff --git a/packages/svelte/src/internal/client/dom/blocks/svelte-element.js b/packages/svelte/src/internal/client/dom/blocks/svelte-element.js
index bb660209e1..1972ee4cb7 100644
--- a/packages/svelte/src/internal/client/dom/blocks/svelte-element.js
+++ b/packages/svelte/src/internal/client/dom/blocks/svelte-element.js
@@ -40,7 +40,7 @@ function swap_block_dom(effect, from, to) {
  * @param {Comment} anchor
  * @param {() => string} get_tag
  * @param {boolean} is_svg
- * @param {undefined | ((element: Element, anchor: Node) => void)} render_fn,
+ * @param {undefined | ((element: Element, anchor: Node | null) => void)} render_fn,
  * @param {undefined | (() => string)} get_namespace
  * @returns {void}
  */
@@ -115,13 +115,11 @@ export function element(anchor, get_tag, is_svg, render_fn, get_namespace) {
 							? element.firstChild && hydrate_anchor(/** @type {Comment} */ (element.firstChild))
 							: element.appendChild(empty());
 
-						if (child_anchor) {
-							// `child_anchor` can be undefined if this is a void element with children,
-							// i.e. `<svelte:element this={"hr"}>...</svelte:element>`. This is
-							// user error, but we warn on it elsewhere (in dev) so here we just
-							// silently ignore it
-							render_fn(element, child_anchor);
-						}
+						// `child_anchor` is undefined if this is a void element, but we still
+						// need to call `render_fn` in order to run actions etc. If the element
+						// contains children, it's a user error (which is warned on elsewhere)
+						// and the DOM will be silently discarded
+						render_fn(element, child_anchor);
 					}
 
 					anchor.before(element);
diff --git a/packages/svelte/tests/runtime-runes/samples/action-void-element/_config.js b/packages/svelte/tests/runtime-runes/samples/action-void-element/_config.js
new file mode 100644
index 0000000000..3ebd8d126a
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/action-void-element/_config.js
@@ -0,0 +1,11 @@
+import { test } from '../../test';
+
+export default test({
+	html: `<input><input>`,
+
+	async test({ assert, target }) {
+		const inputs = target.querySelectorAll('input');
+		assert.equal(inputs[0].value, 'set from action');
+		assert.equal(inputs[1].value, 'set from action');
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/action-void-element/main.svelte b/packages/svelte/tests/runtime-runes/samples/action-void-element/main.svelte
new file mode 100644
index 0000000000..e9a833d6ac
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/action-void-element/main.svelte
@@ -0,0 +1,9 @@
+<script>
+	/** @param {HTMLInputElement} node */
+	function action(node) {
+		node.value = 'set from action';
+	}
+</script>
+
+<input use:action>
+<svelte:element this={'input'} use:action />

From 47ba488cf22a6d3353fe1b550cbfbf96755bbeb6 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 07:53:38 -0400
Subject: [PATCH 05/18] fix: only destroy snippets when they have changed
 (#11267)

* fix: only destroy snippets when they have changed

* tidy up

* changeset

* oops

* tidy up
---
 .changeset/shiny-mayflies-clean.md            |  5 ++++
 .../src/internal/client/dom/blocks/if.js      | 16 +++++-------
 .../src/internal/client/dom/blocks/snippet.js | 18 ++++++++-----
 .../client/dom/elements/transitions.js        | 26 ++++++++++++-------
 .../src/internal/client/reactivity/effects.js |  9 ++++---
 5 files changed, 47 insertions(+), 27 deletions(-)
 create mode 100644 .changeset/shiny-mayflies-clean.md

diff --git a/.changeset/shiny-mayflies-clean.md b/.changeset/shiny-mayflies-clean.md
new file mode 100644
index 0000000000..3adaa3dec8
--- /dev/null
+++ b/.changeset/shiny-mayflies-clean.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: only destroy snippets when they have changed
diff --git a/packages/svelte/src/internal/client/dom/blocks/if.js b/packages/svelte/src/internal/client/dom/blocks/if.js
index c432943c1a..80ed8c09f4 100644
--- a/packages/svelte/src/internal/client/dom/blocks/if.js
+++ b/packages/svelte/src/internal/client/dom/blocks/if.js
@@ -20,15 +20,17 @@ export function if_block(
 	elseif = false
 ) {
 	/** @type {import('#client').Effect | null} */
-	let consequent_effect = null;
+	var consequent_effect = null;
 
 	/** @type {import('#client').Effect | null} */
-	let alternate_effect = null;
+	var alternate_effect = null;
 
 	/** @type {boolean | null} */
-	let condition = null;
+	var condition = null;
 
-	const effect = block(() => {
+	var flags = elseif ? EFFECT_TRANSPARENT : 0;
+
+	block(() => {
 		if (condition === (condition = !!get_condition())) return;
 
 		/** Whether or not there was a hydration mismatch. Needs to be a `let` or else it isn't treeshaken out */
@@ -76,9 +78,5 @@ export function if_block(
 			// continue in hydration mode
 			set_hydrating(true);
 		}
-	});
-
-	if (elseif) {
-		effect.f |= EFFECT_TRANSPARENT;
-	}
+	}, flags);
 }
diff --git a/packages/svelte/src/internal/client/dom/blocks/snippet.js b/packages/svelte/src/internal/client/dom/blocks/snippet.js
index e885440910..c5097ee2c3 100644
--- a/packages/svelte/src/internal/client/dom/blocks/snippet.js
+++ b/packages/svelte/src/internal/client/dom/blocks/snippet.js
@@ -1,5 +1,5 @@
 import { EFFECT_TRANSPARENT } from '../../constants.js';
-import { branch, render_effect } from '../../reactivity/effects.js';
+import { branch, block, destroy_effect } from '../../reactivity/effects.js';
 
 /**
  * @template {(node: import('#client').TemplateNode, ...args: any[]) => import('#client').Dom} SnippetFn
@@ -12,13 +12,19 @@ export function snippet(get_snippet, node, ...args) {
 	/** @type {SnippetFn | null | undefined} */
 	var snippet;
 
-	var effect = render_effect(() => {
+	/** @type {import('#client').Effect | null} */
+	var snippet_effect;
+
+	block(() => {
 		if (snippet === (snippet = get_snippet())) return;
 
-		if (snippet) {
-			branch(() => /** @type {SnippetFn} */ (snippet)(node, ...args));
+		if (snippet_effect) {
+			destroy_effect(snippet_effect);
+			snippet_effect = null;
 		}
-	});
 
-	effect.f |= EFFECT_TRANSPARENT;
+		if (snippet) {
+			snippet_effect = branch(() => /** @type {SnippetFn} */ (snippet)(node, ...args));
+		}
+	}, EFFECT_TRANSPARENT);
 }
diff --git a/packages/svelte/src/internal/client/dom/elements/transitions.js b/packages/svelte/src/internal/client/dom/elements/transitions.js
index a9f55d940f..3551a093da 100644
--- a/packages/svelte/src/internal/client/dom/elements/transitions.js
+++ b/packages/svelte/src/internal/client/dom/elements/transitions.js
@@ -7,7 +7,7 @@ import { should_intro } from '../../render.js';
 import { is_function } from '../../utils.js';
 import { current_each_item } from '../blocks/each.js';
 import { TRANSITION_GLOBAL, TRANSITION_IN, TRANSITION_OUT } from '../../../../constants.js';
-import { BLOCK_EFFECT, EFFECT_RAN } from '../../constants.js';
+import { BLOCK_EFFECT, EFFECT_RAN, EFFECT_TRANSPARENT } from '../../constants.js';
 
 /**
  * @template T
@@ -241,18 +241,26 @@ export function transition(flags, element, get_fn, get_params) {
 
 	(e.transitions ??= []).push(transition);
 
-	// if this is a local transition, we only want to run it if the parent (block) effect's
-	// parent (branch) effect is where the state change happened. we can determine that by
-	// looking at whether the branch effect is currently initializing
+	// if this is a local transition, we only want to run it if the parent (branch) effect's
+	// parent (block) effect is where the state change happened. we can determine that by
+	// looking at whether the block effect is currently initializing
 	if (is_intro && should_intro) {
-		var parent = /** @type {import('#client').Effect} */ (e.parent);
+		let run = is_global;
 
-		// e.g snippets are implemented as render effects — keep going until we find the parent block
-		while ((parent.f & BLOCK_EFFECT) === 0 && parent.parent) {
-			parent = parent.parent;
+		if (!run) {
+			var block = /** @type {import('#client').Effect | null} */ (e.parent);
+
+			// skip over transparent blocks (e.g. snippets, else-if blocks)
+			while (block && (block.f & EFFECT_TRANSPARENT) !== 0) {
+				while ((block = block.parent)) {
+					if ((block.f & BLOCK_EFFECT) !== 0) break;
+				}
+			}
+
+			run = !block || (block.f & EFFECT_RAN) !== 0;
 		}
 
-		if (is_global || (parent.f & EFFECT_RAN) !== 0) {
+		if (run) {
 			effect(() => {
 				untrack(() => transition.in());
 			});
diff --git a/packages/svelte/src/internal/client/reactivity/effects.js b/packages/svelte/src/internal/client/reactivity/effects.js
index 3b0b97ade5..515d13136e 100644
--- a/packages/svelte/src/internal/client/reactivity/effects.js
+++ b/packages/svelte/src/internal/client/reactivity/effects.js
@@ -230,9 +230,12 @@ export function render_effect(fn) {
 	return create_effect(RENDER_EFFECT, fn, true);
 }
 
-/** @param {(() => void)} fn */
-export function block(fn) {
-	return create_effect(RENDER_EFFECT | BLOCK_EFFECT, fn, true);
+/**
+ * @param {(() => void)} fn
+ * @param {number} flags
+ */
+export function block(fn, flags = 0) {
+	return create_effect(RENDER_EFFECT | BLOCK_EFFECT | flags, fn, true);
 }
 
 /** @param {(() => void)} fn */

From fd5f5bb85d5bf304030e4173bea6e4098168b33b Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 07:54:09 -0400
Subject: [PATCH 06/18] monkey-patch console.log and console.warn for all tests
 (#11265)

* monkey-patch console.log and console.warn for all tests

* update legacy tests

* various

* tests passing

* tidy up

* tidy up

* tidier output
---
 .../samples/ignore-mismatched-href/_config.js |  6 +-
 packages/svelte/tests/hydration/test.ts       | 11 ++-
 packages/svelte/tests/runtime-browser/test.ts |  1 -
 .../samples/binding-this-multiple/_config.js  |  8 +--
 .../samples/binding-this-multiple/main.svelte |  3 +-
 .../samples/component-nested-deep/_config.js  |  4 +-
 .../Nested.svelte                             |  8 +--
 .../_config.js                                | 11 +--
 .../main.svelte                               |  5 +-
 .../Nested.svelte                             |  8 +--
 .../_config.js                                |  7 +-
 .../main.svelte                               |  5 +-
 .../Inner.svelte                              |  7 +-
 .../Nested.svelte                             |  5 +-
 .../_config.js                                |  7 +-
 .../main.svelte                               |  3 +-
 .../samples/destroy-twice/_config.js          |  7 +-
 .../empty-component-destroy/Empty.svelte      |  2 +-
 .../empty-component-destroy/_config.js        | 22 +-----
 .../empty-component-destroy/main.svelte       |  2 +-
 .../event-handler-mutation-scope/_config.js   |  6 +-
 .../event-handler-mutation-scope/main.svelte  |  3 +-
 .../Child.svelte                              |  9 ++-
 .../lifecycle-render-afterUpdate2/_config.js  |  9 +--
 .../lifecycle-render-afterUpdate2/log.js      |  2 -
 .../Child.svelte                              |  3 +-
 .../lifecycle-render-beforeUpdate/_config.js  | 10 +--
 .../lifecycle-render-beforeUpdate/main.svelte |  4 +-
 .../_config.js                                | 11 +--
 .../reactive-assignment-prevent-loop/log.js   |  2 -
 .../main.svelte                               |  6 +-
 .../svelte/tests/runtime-legacy/shared.ts     | 68 +++++++++++++------
 .../samples/action-context/_config.js         | 13 ++--
 .../samples/action-context/log.js             |  2 -
 .../samples/action-context/main.svelte        |  6 +-
 .../samples/action-state-arg-deep/Task.svelte |  4 +-
 .../samples/action-state-arg-deep/_config.js  | 11 +--
 .../samples/action-state-arg-deep/log.js      |  2 -
 .../Child.svelte                              |  3 +-
 .../before-update-in-legacy-child/_config.js  |  7 +-
 .../before-update-in-legacy-child/logs.js     |  2 -
 .../samples/bind-this-proxy/_config.js        |  9 +--
 .../samples/bind-this-proxy/log.js            |  2 -
 .../samples/bind-this-proxy/main.svelte       |  3 +-
 .../class-frozen-state-object/_config.js      |  9 +--
 .../samples/class-frozen-state-object/log.js  |  2 -
 .../class-frozen-state-object/main.svelte     |  4 +-
 .../_config.js                                |  9 +--
 .../class-private-frozen-state-object/log.js  |  2 -
 .../main.svelte                               |  4 +-
 .../class-state-derived-unowned/_config.js    | 15 ++--
 .../class-state-derived-unowned/log.js        |  2 -
 .../class-state-derived-unowned/main.svelte   |  8 +--
 .../class-state-init-eager-2/_config.js       |  9 +--
 .../samples/class-state-init-eager-2/log.js   |  2 -
 .../class-state-init-eager-2/main.svelte      |  4 +-
 .../class-state-init-eager-3/_config.js       |  9 +--
 .../samples/class-state-init-eager-3/log.js   |  2 -
 .../class-state-init-eager-3/main.svelte      |  4 +-
 .../samples/class-state-init-eager/_config.js |  9 +--
 .../samples/class-state-init-eager/log.js     |  2 -
 .../class-state-init-eager/main.svelte        |  4 +-
 .../samples/derived-destructure/_config.js    | 19 ++----
 .../samples/derived-destructure/log.js        |  2 -
 .../samples/derived-destructure/main.svelte   |  8 +--
 .../samples/derived-fn-destructure/_config.js | 10 +--
 .../samples/derived-fn-destructure/log.js     |  2 -
 .../derived-fn-destructure/main.svelte        |  4 +-
 .../samples/derived-stale-value/_config.js    |  9 +--
 .../samples/derived-stale-value/log.js        |  2 -
 .../samples/derived-stale-value/main.svelte   |  4 +-
 .../destructure-derived-event/_config.js      |  9 +--
 .../samples/destructure-derived-event/log.js  |  2 -
 .../destructure-derived-event/main.svelte     |  4 +-
 .../samples/dynamic-transition/_config.js     | 13 ++--
 .../samples/dynamic-transition/log.js         |  2 -
 .../samples/dynamic-transition/main.svelte    |  6 +-
 .../samples/effect-cleanup/_config.js         |  9 +--
 .../samples/effect-cleanup/log.js             |  2 -
 .../samples/effect-cleanup/main.svelte        |  8 +--
 .../samples/effect-order-2/_config.js         |  9 +--
 .../samples/effect-order-2/log.js             |  2 -
 .../samples/effect-order-2/main.svelte        |  7 +-
 .../samples/effect-order/_config.js           |  9 +--
 .../runtime-runes/samples/effect-order/log.js |  2 -
 .../samples/effect-order/main.svelte          |  6 +-
 .../samples/effect-root-2/_config.js          | 13 ++--
 .../samples/effect-root-2/log.js              |  2 -
 .../samples/effect-root-2/main.svelte         |  6 +-
 .../samples/effect-root/_config.js            | 13 ++--
 .../runtime-runes/samples/effect-root/log.js  |  2 -
 .../samples/effect-root/main.svelte           |  8 +--
 .../runtime-runes/samples/effect/_config.js   |  9 +--
 .../tests/runtime-runes/samples/effect/log.js |  2 -
 .../runtime-runes/samples/effect/main.svelte  |  4 +-
 .../samples/effects-order/_config.js          |  9 +--
 .../samples/effects-order/log.js              |  2 -
 .../samples/effects-order/main.svelte         |  6 +-
 .../event-attribute-delegation-2/_config.js   |  9 +--
 .../event-attribute-delegation-2/log.js       |  2 -
 .../event-attribute-delegation-2/main.svelte  |  7 +-
 .../event-attribute-delegation-3/_config.js   |  9 +--
 .../event-attribute-delegation-3/log.js       |  2 -
 .../event-attribute-delegation-3/main.svelte  |  9 ++-
 .../event-attribute-delegation-4/_config.js   | 13 ++--
 .../event-attribute-delegation-4/log.js       |  2 -
 .../event-attribute-delegation-4/main.svelte  |  9 ++-
 .../event-attribute-delegation-4/sub.svelte   | 10 +--
 .../event-attribute-delegation-5/_config.js   |  9 +--
 .../event-attribute-delegation-5/log.js       |  2 -
 .../event-attribute-delegation-5/main.svelte  | 10 +--
 .../event-attribute-delegation-6/_config.js   |  9 +--
 .../event-attribute-delegation-6/log.js       |  2 -
 .../event-attribute-delegation-6/main.svelte  |  4 +-
 .../event-attribute-delegation-7/_config.js   |  9 +--
 .../event-attribute-delegation-7/log.js       |  2 -
 .../event-attribute-delegation-7/main.svelte  |  8 +--
 .../event-attribute-delegation/_config.js     |  9 +--
 .../samples/event-attribute-delegation/log.js |  2 -
 .../event-attribute-delegation/main.svelte    |  9 ++-
 .../samples/event-prop-reference/_config.js   |  9 +--
 .../samples/event-prop-reference/log.js       |  2 -
 .../samples/event-prop-reference/main.svelte  |  4 +-
 .../samples/inspect-derived-2/_config.js      | 24 +------
 .../samples/inspect-multiple/_config.js       | 24 +------
 .../samples/inspect-nested-state/_config.js   | 24 +------
 .../samples/inspect-new-property/_config.js   | 24 +------
 .../samples/inspect-trace/_config.js          | 28 ++------
 .../runtime-runes/samples/inspect/_config.js  | 24 +------
 .../Item.svelte                               | 10 ++-
 .../_config.js                                | 13 ++--
 .../log.js                                    |  2 -
 .../main.svelte                               |  9 ++-
 .../Item.svelte                               |  8 +--
 .../_config.js                                | 13 ++--
 .../log.js                                    |  2 -
 .../main.svelte                               |  5 +-
 .../Item.svelte                               | 10 ++-
 .../_config.js                                | 13 ++--
 .../log.js                                    |  2 -
 .../main.svelte                               |  9 ++-
 .../_config.js                                | 13 ++--
 .../log.js                                    |  2 -
 .../main.svelte                               | 11 +--
 .../Item.svelte                               |  8 +--
 .../_config.js                                | 13 ++--
 .../log.js                                    |  2 -
 .../main.svelte                               |  7 +-
 .../samples/nested-effect-conflict/_config.js |  9 +--
 .../samples/nested-effect-conflict/log.js     |  2 -
 .../nested-effect-conflict/main.svelte        | 21 +++---
 .../samples/nested-script-tag/_config.js      | 23 +------
 .../_config.js                                | 16 +----
 .../samples/nullish-operator/_config.js       |  9 +--
 .../samples/nullish-operator/log.js           |  2 -
 .../samples/nullish-operator/main.svelte      |  6 +-
 .../samples/pre-effect-ordering/_config.js    |  9 +--
 .../samples/pre-effect-ordering/log.js        |  2 -
 .../samples/pre-effect-ordering/main.svelte   |  8 +--
 .../samples/pre-effect/_config.js             |  9 +--
 .../runtime-runes/samples/pre-effect/log.js   |  2 -
 .../samples/pre-effect/main.svelte            |  4 +-
 .../samples/props-derived-2/Item.svelte       |  4 +-
 .../samples/props-derived-2/_config.js        | 11 +--
 .../samples/props-derived-2/log.js            |  2 -
 .../samples/props-equality/main.svelte        |  2 +-
 .../samples/readonly-state/_config.js         |  9 +--
 .../samples/readonly-state/log.js             |  2 -
 .../samples/readonly-state/main.svelte        |  4 +-
 .../samples/snippet-reactive-args/_config.js  | 15 ++--
 .../snippet-reactive-args/inner.svelte        |  4 +-
 .../samples/snippet-reactive-args/main.svelte |  4 +-
 .../store-subscribe-effect-init/_config.js    | 13 ++--
 .../store-subscribe-effect-init/log.js        |  2 -
 .../store-subscribe-effect-init/main.svelte   |  3 +-
 .../text-multiple-call-expression/_config.js  |  9 +--
 .../text-multiple-call-expression/log.js      |  2 -
 .../text-multiple-call-expression/main.svelte |  6 +-
 178 files changed, 404 insertions(+), 927 deletions(-)
 delete mode 100644 packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/log.js
 delete mode 100644 packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/action-context/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/logs.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/bind-this-proxy/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/class-state-init-eager/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/derived-destructure/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/derived-stale-value/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/destructure-derived-event/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/dynamic-transition/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effect-cleanup/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order-2/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effect-order/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effect-root-2/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effect-root/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effect/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/effects-order/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/event-prop-reference/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/nullish-operator/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/pre-effect/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/props-derived-2/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/readonly-state/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/log.js
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/log.js

diff --git a/packages/svelte/tests/hydration/samples/ignore-mismatched-href/_config.js b/packages/svelte/tests/hydration/samples/ignore-mismatched-href/_config.js
index ce81251e5e..5ebdbb2680 100644
--- a/packages/svelte/tests/hydration/samples/ignore-mismatched-href/_config.js
+++ b/packages/svelte/tests/hydration/samples/ignore-mismatched-href/_config.js
@@ -11,5 +11,9 @@ export default test({
 
 	test(assert, target) {
 		assert.equal(target.querySelector('a')?.getAttribute('href'), '/bar');
-	}
+	},
+
+	errors: [
+		'Detected a href attribute value change during hydration. This will not be repaired during hydration, the href value that came from the server will be used. Related element:'
+	]
 });
diff --git a/packages/svelte/tests/hydration/test.ts b/packages/svelte/tests/hydration/test.ts
index 6884504718..9002f56d51 100644
--- a/packages/svelte/tests/hydration/test.ts
+++ b/packages/svelte/tests/hydration/test.ts
@@ -32,6 +32,7 @@ interface HydrationTest extends BaseTest {
 	) => void | Promise<void>;
 	before_test?: () => void;
 	after_test?: () => void;
+	errors?: any[];
 }
 
 function read(path: string): string | void {
@@ -65,6 +66,7 @@ const { test, run } = suite<HydrationTest>(async (config, cwd) => {
 		const snapshot = config.snapshot ? config.snapshot(target) : {};
 
 		const error = console.error;
+		const errors: any[] = [];
 		let got_hydration_error = false;
 		console.error = (message: any) => {
 			if (typeof message === 'string' && message.startsWith('ERR_SVELTE_HYDRATION_MISMATCH')) {
@@ -73,7 +75,7 @@ const { test, run } = suite<HydrationTest>(async (config, cwd) => {
 					error(message);
 				}
 			} else {
-				error(message);
+				errors.push(message);
 			}
 		};
 
@@ -85,12 +87,19 @@ const { test, run } = suite<HydrationTest>(async (config, cwd) => {
 		});
 
 		console.error = error;
+
 		if (config.expect_hydration_error) {
 			assert.ok(got_hydration_error, 'Expected hydration error');
 		} else {
 			assert.ok(!got_hydration_error, 'Unexpected hydration error');
 		}
 
+		if (config.errors) {
+			assert.deepEqual(errors, config.errors);
+		} else if (errors.length) {
+			throw new Error(`Unexpected errors: ${errors.join('\n')}`);
+		}
+
 		const expected = read(`${cwd}/_expected.html`) ?? rendered.html;
 		assert_html_equal(target.innerHTML, expected);
 
diff --git a/packages/svelte/tests/runtime-browser/test.ts b/packages/svelte/tests/runtime-browser/test.ts
index b2df361aa5..d58f7e78cd 100644
--- a/packages/svelte/tests/runtime-browser/test.ts
+++ b/packages/svelte/tests/runtime-browser/test.ts
@@ -14,7 +14,6 @@ let browser: import('@playwright/test').Browser;
 
 beforeAll(async () => {
 	browser = await chromium.launch();
-	console.log('[runtime-browser] Launched browser');
 }, 20000);
 
 afterAll(async () => {
diff --git a/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/_config.js b/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/_config.js
index 07356ad6fd..88b0ff31e3 100644
--- a/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/_config.js
@@ -2,11 +2,11 @@ import { flushSync } from 'svelte';
 import { test } from '../../test';
 
 export default test({
-	test({ assert, component, target }) {
+	test({ assert, target, logs }) {
 		const [b1, b2, b3] = target.querySelectorAll('button');
 		const first_h1 = target.querySelector('h1');
 
-		assert.deepEqual(component.log, [undefined, first_h1]);
+		assert.deepEqual(logs, [undefined, first_h1]);
 
 		flushSync(() => {
 			b3.click();
@@ -14,12 +14,12 @@ export default test({
 
 		const third_h1 = target.querySelector('h1');
 
-		assert.deepEqual(component.log, [undefined, first_h1, third_h1]);
+		assert.deepEqual(logs, [undefined, first_h1, third_h1]);
 
 		flushSync(() => {
 			b1.click();
 		});
 
-		assert.deepEqual(component.log, [undefined, first_h1, third_h1, target.querySelector('h1')]);
+		assert.deepEqual(logs, [undefined, first_h1, third_h1, target.querySelector('h1')]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/main.svelte b/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/main.svelte
index bde2158c51..2fb062c2ee 100644
--- a/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/binding-this-multiple/main.svelte
@@ -1,9 +1,8 @@
 <script>
 	let activeTab = 0;
 	let activeHeading;
-	export let log = [];
 
-	$: log.push(activeHeading);
+	$: console.log(activeHeading);
 </script>
 
 <div class="tabs">
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-nested-deep/_config.js b/packages/svelte/tests/runtime-legacy/samples/component-nested-deep/_config.js
index e61d8d7b38..da6b9c0442 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-nested-deep/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/component-nested-deep/_config.js
@@ -4,5 +4,7 @@ import { unmount } from 'svelte';
 export default test({
 	test({ component }) {
 		unmount(component.l1);
-	}
+	},
+
+	warnings: ['Tried to unmount a component that was not mounted.']
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/Nested.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/Nested.svelte
index fab3ae1890..d6e214a926 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/Nested.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/Nested.svelte
@@ -1,14 +1,14 @@
 <script>
 	let keys = ['a', 'b'];
 	let items = ['c', 'd'];
-  export let log;
+
 	function setKey(key, value, item) {
-		log.push(`setKey(${key}, ${value}, ${item})`);
-  }
+		console.log(`setKey(${key}, ${value}, ${item})`);
+	}
 </script>
 
 {#each items as item (item)}
 	{#each keys as key (key)}
 		<slot {key} {item} set={(value) => setKey(key, value, item)} />
 	{/each}
-{/each}
\ No newline at end of file
+{/each}
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/_config.js b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/_config.js
index 4633776a1f..563efe099a 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/_config.js
@@ -7,25 +7,26 @@ export default test({
 		<button type="button">Set a-d</button>
 		<button type="button">Set b-d</button>
 	`,
-	async test({ assert, target, window, component }) {
+
+	async test({ assert, target, window, logs }) {
 		const [btn1, btn2, btn3, btn4] = target.querySelectorAll('button');
 		const click = new window.MouseEvent('click', { bubbles: true });
 
 		await btn1.dispatchEvent(click);
-		assert.deepEqual(component.log, ['setKey(a, value-a-c, c)']);
+		assert.deepEqual(logs, ['setKey(a, value-a-c, c)']);
 
 		await btn2.dispatchEvent(click);
-		assert.deepEqual(component.log, ['setKey(a, value-a-c, c)', 'setKey(b, value-b-c, c)']);
+		assert.deepEqual(logs, ['setKey(a, value-a-c, c)', 'setKey(b, value-b-c, c)']);
 
 		await btn3.dispatchEvent(click);
-		assert.deepEqual(component.log, [
+		assert.deepEqual(logs, [
 			'setKey(a, value-a-c, c)',
 			'setKey(b, value-b-c, c)',
 			'setKey(a, value-a-d, d)'
 		]);
 
 		await btn4.dispatchEvent(click);
-		assert.deepEqual(component.log, [
+		assert.deepEqual(logs, [
 			'setKey(a, value-a-c, c)',
 			'setKey(b, value-b-c, c)',
 			'setKey(a, value-a-d, d)',
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/main.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/main.svelte
index 7feb55aaf6..187b4167d5 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each-nested/main.svelte
@@ -1,8 +1,7 @@
 <script>
 	import Nested from './Nested.svelte';
-	export let log = [];
 </script>
 
-<Nested {log} let:set let:key let:item>
+<Nested let:set let:key let:item>
 	<button type="button" on:click={() => set(`value-${key}-${item}`)}>Set {key}-{item}</button>
-</Nested>
\ No newline at end of file
+</Nested>
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/Nested.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/Nested.svelte
index a29ffe0376..f356bca079 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/Nested.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/Nested.svelte
@@ -1,11 +1,11 @@
 <script>
 	let keys = ['a', 'b'];
-  export let log;
+
 	function setKey(key, value) {
-		log.push(`setKey(${key}, ${value})`);
-  }
+		console.log(`setKey(${key}, ${value})`);
+	}
 </script>
 
 {#each keys as key (key)}
 	<slot {key} set={(value) => setKey(key, value)} />
-{/each}
\ No newline at end of file
+{/each}
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/_config.js b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/_config.js
index 008089edc3..7a3eec4eeb 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/_config.js
@@ -5,14 +5,15 @@ export default test({
 		<button type="button">Set a</button>
 		<button type="button">Set b</button>
 	`,
-	async test({ assert, target, window, component }) {
+
+	async test({ assert, target, window, logs }) {
 		const [btn1, btn2] = target.querySelectorAll('button');
 		const click = new window.MouseEvent('click', { bubbles: true });
 
 		await btn1.dispatchEvent(click);
-		assert.deepEqual(component.log, ['setKey(a, value-a)']);
+		assert.deepEqual(logs, ['setKey(a, value-a)']);
 
 		await btn2.dispatchEvent(click);
-		assert.deepEqual(component.log, ['setKey(a, value-a)', 'setKey(b, value-b)']);
+		assert.deepEqual(logs, ['setKey(a, value-a)', 'setKey(b, value-b)']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/main.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/main.svelte
index 7dc17b4c95..777ad5a0ee 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-each/main.svelte
@@ -1,8 +1,7 @@
 <script>
 	import Nested from './Nested.svelte';
-	export let log = [];
 </script>
 
-<Nested {log} let:set let:key>
+<Nested let:set let:key>
 	<button type="button" on:click={() => set(`value-${key}`)}>Set {key}</button>
-</Nested>
\ No newline at end of file
+</Nested>
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Inner.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Inner.svelte
index 6beaabbb68..41673867d2 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Inner.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Inner.svelte
@@ -1,9 +1,8 @@
 <script>
-  export let log;
 	function setKey(key, value) {
-		log.push(`setKey(${key}, ${value})`);
-  }
+		console.log(`setKey(${key}, ${value})`);
+	}
 </script>
 
 <slot key="a" set={setKey} />
-<slot key="b" set={setKey} />
\ No newline at end of file
+<slot key="b" set={setKey} />
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Nested.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Nested.svelte
index 97c44c5145..4e63d7f3fc 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Nested.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/Nested.svelte
@@ -1,8 +1,7 @@
 <script>
 	import Inner from './Inner.svelte';
-  export let log;
 </script>
 
-<Inner {log} let:key let:set>
+<Inner let:key let:set>
 	<slot {key} set={(value) => set(key, value)} />
-</Inner>
\ No newline at end of file
+</Inner>
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/_config.js b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/_config.js
index 008089edc3..7a3eec4eeb 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/_config.js
@@ -5,14 +5,15 @@ export default test({
 		<button type="button">Set a</button>
 		<button type="button">Set b</button>
 	`,
-	async test({ assert, target, window, component }) {
+
+	async test({ assert, target, window, logs }) {
 		const [btn1, btn2] = target.querySelectorAll('button');
 		const click = new window.MouseEvent('click', { bubbles: true });
 
 		await btn1.dispatchEvent(click);
-		assert.deepEqual(component.log, ['setKey(a, value-a)']);
+		assert.deepEqual(logs, ['setKey(a, value-a)']);
 
 		await btn2.dispatchEvent(click);
-		assert.deepEqual(component.log, ['setKey(a, value-a)', 'setKey(b, value-b)']);
+		assert.deepEqual(logs, ['setKey(a, value-a)', 'setKey(b, value-b)']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/main.svelte b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/main.svelte
index a061f73b3a..777ad5a0ee 100644
--- a/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/component-slot-context-props-let/main.svelte
@@ -1,8 +1,7 @@
 <script>
 	import Nested from './Nested.svelte';
-	export let log = [];
 </script>
 
-<Nested {log} let:set let:key>
+<Nested let:set let:key>
 	<button type="button" on:click={() => set(`value-${key}`)}>Set {key}</button>
 </Nested>
diff --git a/packages/svelte/tests/runtime-legacy/samples/destroy-twice/_config.js b/packages/svelte/tests/runtime-legacy/samples/destroy-twice/_config.js
index 4fe9fbaf45..bfdf090cbd 100644
--- a/packages/svelte/tests/runtime-legacy/samples/destroy-twice/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/destroy-twice/_config.js
@@ -5,5 +5,10 @@ export default test({
 	test({ component }) {
 		unmount(component);
 		unmount(component);
-	}
+	},
+
+	warnings: [
+		'Tried to unmount a component that was not mounted.',
+		'Tried to unmount a component that was not mounted.'
+	]
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/Empty.svelte b/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/Empty.svelte
index 616839ee0e..1708640d08 100644
--- a/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/Empty.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/Empty.svelte
@@ -1,6 +1,6 @@
 
 <script>
-  import { onDestroy } from 'svelte';
+	import { onDestroy } from 'svelte';
 
 	onDestroy(() => {
 		console.log('destroy');
diff --git a/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/_config.js b/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/_config.js
index a47e7976eb..d6f1b5a07e 100644
--- a/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/_config.js
@@ -1,30 +1,14 @@
 import { test } from '../../test';
 
-/**
- * @type {{ (...data: any[]): void; (message?: any, ...optionalParams: any[]): void; (...data: any[]): void; (message?: any, ...optionalParams: any[]): void; }}
- */
-let log;
-
 export default test({
 	html: `
 	  <button>destroy component</button>
 	`,
 
-	before_test() {
-		log = console.log;
-	},
-	after_test() {
-		console.log = log;
-	},
-
-	async test({ assert, target, window }) {
+	async test({ assert, target, window, logs }) {
 		const button = target.querySelector('button');
 		const event = new window.MouseEvent('click');
-		/**
-		 * @type {any[]}
-		 */
-		const messages = [];
-		console.log = (msg) => messages.push(msg);
+
 		// @ts-ignore
 		await button.dispatchEvent(event);
 		assert.htmlEqual(
@@ -33,6 +17,6 @@ export default test({
 			<button>destroy component</button>
 		`
 		);
-		assert.deepEqual(messages, ['destroy']);
+		assert.deepEqual(logs, ['destroy']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/main.svelte b/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/main.svelte
index 0ee5ef4a04..7f7d50582f 100644
--- a/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/empty-component-destroy/main.svelte
@@ -3,6 +3,6 @@
 	let active = true;
 </script>
 
-<button on:click='{() => active = false }'>destroy component</button>
+<button on:click={() => active = false }>destroy component</button>
 
 <svelte:component this={active ? Empty : null} />
diff --git a/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/_config.js b/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/_config.js
index 96e5edba1f..825ffc73ef 100644
--- a/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/_config.js
@@ -2,7 +2,7 @@ import { flushSync } from 'svelte';
 import { ok, test } from '../../test';
 
 export default test({
-	test({ assert, component, target, window }) {
+	test({ assert, logs, target }) {
 		const button = target.querySelector('button');
 		ok(button);
 
@@ -10,12 +10,12 @@ export default test({
 			button.click();
 		});
 
-		assert.deepEqual(component.log, ['1 - 1']);
+		assert.deepEqual(logs, ['1 - 1']);
 
 		flushSync(() => {
 			button.click();
 		});
 
-		assert.deepEqual(component.log, ['1 - 1', '2 - 2']);
+		assert.deepEqual(logs, ['1 - 1', '2 - 2']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/main.svelte b/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/main.svelte
index b7b9f3da0c..4ef9bf62bc 100644
--- a/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/event-handler-mutation-scope/main.svelte
@@ -1,5 +1,4 @@
 <script>
-	export let log = [];
 	let referenced_directly = 0;
 	let not_referenced_directly = 0;
 	let css_based_on_not_referenced = '';
@@ -8,7 +7,7 @@
 		referenced_directly += 1;
 		not_referenced_directly += 1;
 		css_based_on_not_referenced = not_referenced_directly % 2 == 1 ? 'background-color: red' : '';
-		log.push(referenced_directly + ' - ' + not_referenced_directly); //only referenced_directly is increasing
+		console.log(referenced_directly + ' - ' + not_referenced_directly); //only referenced_directly is increasing
 	}
 </script>
 
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/Child.svelte b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/Child.svelte
index 29a201e16c..50fb461cb3 100644
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/Child.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/Child.svelte
@@ -1,24 +1,23 @@
 <script>
 	import { beforeUpdate, afterUpdate } from "svelte";
-	import { log } from './log.js';
 
 	export let a;
 	export let b;
 
 	beforeUpdate(() => {
-		log.push('before');
+		console.log('before');
 	});
 
 	beforeUpdate(()=>{
-		log.push(`before ${a}, ${b}`);
+		console.log(`before ${a}, ${b}`);
 	});
 
 	afterUpdate(() => {
-		log.push('after');
+		console.log('after');
 	});
 
 	afterUpdate(()=>{
-		log.push(`after ${a}, ${b}`);
+		console.log(`after ${a}, ${b}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js
index 4050d2ef03..1309ef8a24 100644
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 import { test, ok } from '../../test';
 
 export default test({
-	before_test: () => {
-		log.length = 0;
-	},
-
-	test({ assert, target }) {
+	test({ assert, target, logs }) {
 		const [button1, button2] = target.querySelectorAll('button');
 		ok(button1);
 		ok(button2);
@@ -18,7 +13,7 @@ export default test({
 		button2.click();
 		flushSync();
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'before',
 			'before 0, 0',
 			'after',
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/log.js b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/log.js
deleted file mode 100644
index a119176880..0000000000
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {string[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/Child.svelte b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/Child.svelte
index af01095d95..0c43f7cc29 100644
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/Child.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/Child.svelte
@@ -1,7 +1,6 @@
 <script>
 	export let name;
-	export let log;
-	$: log.push('name in child: ' + name);
+	$: console.log('name in child: ' + name);
 </script>
 
 <p>welcome, dan</p>
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/_config.js b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/_config.js
index a723026b8d..98eb7716fb 100644
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/_config.js
@@ -2,11 +2,11 @@ import { test } from '../../test';
 import { flushSync } from 'svelte';
 
 export default test({
-	async test({ assert, target, component }) {
+	async test({ assert, target, logs }) {
 		const input = /** @type {HTMLInputElement} */ (target.querySelector('input'));
 		assert.equal(input?.value, 'rich');
 
-		assert.deepEqual(component.log, []);
+		assert.deepEqual(logs, []);
 
 		const inputEvent = new window.InputEvent('input');
 		input.value = 'dan';
@@ -14,15 +14,15 @@ export default test({
 
 		flushSync();
 
-		assert.deepEqual(component.log, ['name in child: dan']);
+		assert.deepEqual(logs, ['name in child: dan']);
 
-		component.log.length = 0;
+		logs.length = 0;
 
 		input.value = 'da';
 		await input.dispatchEvent(inputEvent);
 
 		flushSync();
 
-		assert.deepEqual(component.log, []);
+		assert.deepEqual(logs, []);
 	}
 });
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/main.svelte b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/main.svelte
index 0793bb45d0..d63945bbc7 100644
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-beforeUpdate/main.svelte
@@ -2,8 +2,6 @@
 	import { beforeUpdate } from 'svelte';
 	import Child from './Child.svelte';
 
-	export let log = [];
-	
 	let name = 'rich';
 	let allowed = false;
 
@@ -16,5 +14,5 @@
 <input bind:value={name} />
 
 {#if allowed}
-	<Child name={name} log={log} />
+	<Child name={name} />
 {/if}
diff --git a/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/_config.js b/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/_config.js
index 35619e3a0a..7c15475384 100644
--- a/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/_config.js
@@ -1,21 +1,16 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: '<button>1 / 1</button>',
 
-	before_test() {
-		log.length = 0;
-	},
-
-	test({ assert, target }) {
-		assert.deepEqual(log, [2, 1]);
+	test({ assert, target, logs }) {
+		assert.deepEqual(logs, [2, 1]);
 
 		const button = target.querySelector('button');
 
 		flushSync(() => button?.click());
-		assert.deepEqual(log, [2, 1, 2, 1]);
+		assert.deepEqual(logs, [2, 1, 2, 1]);
 
 		assert.htmlEqual(target.innerHTML, '<button>3 / 2</button>');
 	}
diff --git a/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/log.js b/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/main.svelte b/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/main.svelte
index c65c992b0c..50b91246ff 100644
--- a/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/main.svelte
+++ b/packages/svelte/tests/runtime-legacy/samples/reactive-assignment-prevent-loop/main.svelte
@@ -1,6 +1,4 @@
 <script>
-	import { log } from './log.js';
-
 	let count1 = 0;
 	let count2 = 0;
 
@@ -9,12 +7,12 @@
 	}
 
 	$: if (count2 < 10) {
-		log.push(1);
+		console.log(1);
 		increaseCount1();
 	}
 
 	$: if (count1 < 10) {
-		log.push(2);
+		console.log(2);
 		count2++;
 	}
 </script>
diff --git a/packages/svelte/tests/runtime-legacy/shared.ts b/packages/svelte/tests/runtime-legacy/shared.ts
index a0d00ec1c5..039cf64eb0 100644
--- a/packages/svelte/tests/runtime-legacy/shared.ts
+++ b/packages/svelte/tests/runtime-legacy/shared.ts
@@ -1,7 +1,6 @@
 import * as fs from 'node:fs';
 import { setImmediate } from 'node:timers/promises';
 import glob from 'tiny-glob/sync.js';
-import * as $ from 'svelte/internal/client';
 import { createClassComponent } from 'svelte/legacy';
 import { flushSync } from 'svelte';
 import { render } from 'svelte/server';
@@ -56,6 +55,8 @@ export interface RuntimeTest<Props extends Record<string, any> = Record<string,
 			KeyboardEvent: typeof KeyboardEvent;
 			MouseEvent: typeof MouseEvent;
 		};
+		logs: any[];
+		warnings: any[];
 	}) => void | Promise<void>;
 	test_ssr?: (args: { assert: Assert }) => void | Promise<void>;
 	accessors?: boolean;
@@ -151,6 +152,36 @@ async function run_test_variant(
 ) {
 	let unintended_error = false;
 
+	// eslint-disable-next-line no-console
+	const { log, warn } = console;
+
+	let logs: string[] = [];
+	let warnings: string[] = [];
+
+	{
+		// use some crude static analysis to determine if logs/warnings are intercepted.
+		// we do this instead of using getters on the `test` parameters so that we can
+		// squelch logs in SSR tests while printing temporary logs in other cases
+		let str = config.test?.toString() ?? '';
+		let n = 0;
+		let i = 0;
+		while (i < str.length) {
+			if (str[i] === '(') n++;
+			if (str[i] === ')' && --n === 0) break;
+			i++;
+		}
+
+		if (str.slice(0, i).includes('logs')) {
+			// eslint-disable-next-line no-console
+			console.log = (...args) => logs.push(...args);
+		}
+
+		if (str.slice(0, i).includes('warnings') || config.warnings) {
+			// eslint-disable-next-line no-console
+			console.warn = (...args) => warnings.push(...args);
+		}
+	}
+
 	try {
 		unhandled_rejection = null;
 
@@ -237,15 +268,9 @@ async function run_test_variant(
 				});
 			}
 		} else {
-			config.before_test?.();
+			logs.length = warnings.length = 0;
 
-			const warnings: string[] = [];
-			// eslint-disable-next-line no-console
-			const warn = console.warn;
-			// eslint-disable-next-line no-console
-			console.warn = (warning) => {
-				warnings.push(warning);
-			};
+			config.before_test?.();
 
 			// eslint-disable-next-line no-console
 			const error = console.error;
@@ -266,8 +291,6 @@ async function run_test_variant(
 				hydrate: variant === 'hydrate'
 			});
 
-			// eslint-disable-next-line no-console
-			console.warn = warn;
 			// eslint-disable-next-line no-console
 			console.error = error;
 
@@ -276,13 +299,6 @@ async function run_test_variant(
 				assert.fail('Expected a runtime error');
 			}
 
-			if (config.warnings) {
-				assert.deepEqual(warnings, config.warnings);
-			} else if (warnings.length) {
-				unintended_error = true;
-				assert.fail('Received unexpected warnings');
-			}
-
 			if (config.html) {
 				flushSync();
 				assert_html_equal_with_options(target.innerHTML, config.html, {
@@ -309,7 +325,9 @@ async function run_test_variant(
 						snapshot,
 						window,
 						raf,
-						compileOptions
+						compileOptions,
+						logs,
+						warnings
 					});
 				}
 
@@ -319,6 +337,15 @@ async function run_test_variant(
 				}
 			} finally {
 				instance.$destroy();
+
+				if (config.warnings) {
+					assert.deepEqual(warnings, config.warnings);
+				} else if (warnings.length && console.warn === warn) {
+					unintended_error = true;
+					warn.apply(console, warnings);
+					assert.fail('Received unexpected warnings');
+				}
+
 				assert_html_equal(
 					target.innerHTML,
 					'',
@@ -341,6 +368,9 @@ async function run_test_variant(
 			throw err;
 		}
 	} finally {
+		console.log = log;
+		console.warn = warn;
+
 		config.after_test?.();
 
 		// Free up the microtask queue
diff --git a/packages/svelte/tests/runtime-runes/samples/action-context/_config.js b/packages/svelte/tests/runtime-runes/samples/action-context/_config.js
index 87e9842d9a..b23e88901a 100644
--- a/packages/svelte/tests/runtime-runes/samples/action-context/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/action-context/_config.js
@@ -1,22 +1,17 @@
 import { ok, test } from '../../test';
-import { flushSync, tick } from 'svelte';
-import { log } from './log.js';
+import { flushSync } from 'svelte';
 
 export default test({
 	html: `<button>0</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 		ok(btn);
 
 		flushSync(() => btn.click());
-		assert.deepEqual(log, ['update', 0, 1]);
+		assert.deepEqual(logs, ['update', 0, 1]);
 
 		flushSync(() => btn.click());
-		assert.deepEqual(log, ['update', 0, 1, 'destroy', 1]);
+		assert.deepEqual(logs, ['update', 0, 1, 'destroy', 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/action-context/log.js b/packages/svelte/tests/runtime-runes/samples/action-context/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/action-context/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/action-context/main.svelte b/packages/svelte/tests/runtime-runes/samples/action-context/main.svelte
index ef8f7894cc..fe3e317038 100644
--- a/packages/svelte/tests/runtime-runes/samples/action-context/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/action-context/main.svelte
@@ -1,6 +1,4 @@
 <script>
-	import { log } from './log.js';
-
 	let count = $state(0);
 
 	/**
@@ -12,10 +10,10 @@
 			count,
 			/** @param {number} count */
 			update(count) {
-				log.push('update', this.count, (this.count = count));
+				console.log('update', this.count, (this.count = count));
 			},
 			destroy() {
-				log.push('destroy', this.count);
+				console.log('destroy', this.count);
 			},
 		}
 	};
diff --git a/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/Task.svelte b/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/Task.svelte
index c6087dc822..fae15f043d 100644
--- a/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/Task.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/Task.svelte
@@ -1,6 +1,4 @@
 <script>
-	import { log } from './log.js';
-
   const { prop } = $props()
 
   let trackedState = $state(0)
@@ -8,7 +6,7 @@
 
   function dummyAction(el, { getTrackedState, propFromComponent }) {
     $effect(() => {
-      log.push("action $effect: ", { buttonClicked: getTrackedState() })
+      console.log("action $effect: ", { buttonClicked: getTrackedState() })
     })
   }
 </script>
diff --git a/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/_config.js b/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/_config.js
index c263855bec..3bf9aa66d6 100644
--- a/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/_config.js
@@ -1,15 +1,10 @@
 import { test } from '../../test';
-import { flushSync, tick } from 'svelte';
-import { log } from './log.js';
+import { flushSync } from 'svelte';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
 	html: `<div class="container">{"text":"initial"}</div><button>update tracked state</button><button>Update prop</button>`,
 
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [btn1, btn2] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -30,7 +25,7 @@ export default test({
 			`<div class="container">{"text":"updated"}</div><button>update tracked state</button><button>Update prop</button>`
 		);
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'action $effect: ',
 			{ buttonClicked: 0 },
 			'action $effect: ',
diff --git a/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/log.js b/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/action-state-arg-deep/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/Child.svelte b/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/Child.svelte
index 9841295830..2a2dea8220 100644
--- a/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/Child.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/Child.svelte
@@ -2,11 +2,10 @@
 
 <script>
 	import { beforeUpdate } from 'svelte';
-	import { logs } from './logs.js'
 
 	export let object;
 
 	beforeUpdate(() => {
-		logs.push('changed');
+		console.log('changed');
 	});
 </script>
diff --git a/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/_config.js b/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/_config.js
index aa42c2a2d6..8d4d63254d 100644
--- a/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/_config.js
@@ -1,20 +1,15 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { logs } from './logs.js';
 
 export default test({
 	html: `<button>clicks: 0</button>`,
 
-	test({ assert, target }) {
+	test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		flushSync(() => btn?.click());
 
 		assert.htmlEqual(target.innerHTML, `<button>clicks: 1</button>`);
 		assert.deepEqual(logs, ['changed', 'changed']);
-	},
-
-	after_test() {
-		logs.length = 0;
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/logs.js b/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/logs.js
deleted file mode 100644
index 8c8a1318cb..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/before-update-in-legacy-child/logs.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const logs = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/_config.js b/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/_config.js
index e075b5a588..c07f8d05a4 100644
--- a/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/_config.js
@@ -1,15 +1,10 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test: () => {
-		log.length = 0;
-	},
-
 	html: `<button>Toggle</button><div>Hello\nworld</div>`,
 
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [btn1] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -24,6 +19,6 @@ export default test({
 
 		assert.htmlEqual(target.innerHTML, `<button>Toggle</button><div>Hello\nworld</div>`);
 
-		assert.deepEqual(log, [{ a: {} }, null, { a: {} }]);
+		assert.deepEqual(logs, [{ a: {} }, null, { a: {} }]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/log.js b/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/main.svelte b/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/main.svelte
index adc67f46ae..6c24d5588a 100644
--- a/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/bind-this-proxy/main.svelte
@@ -1,12 +1,11 @@
 <script>
-	import { log } from './log.js';
 	import Component from './Component.svelte';
 
 	let type = $state(Component)
 	let elem = $state()
 
 	$effect(() => {
-		log.push(elem);
+		console.log(elem);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/_config.js b/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/_config.js
index 6ad9dff351..79a0d13bdd 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/_config.js
@@ -1,14 +1,9 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: `<button>0</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		await btn?.click();
@@ -17,6 +12,6 @@ export default test({
 		await btn?.click();
 		assert.htmlEqual(target.innerHTML, `<button>0</button>`);
 
-		assert.deepEqual(log, ['read only', 'read only']);
+		assert.deepEqual(logs, ['read only', 'read only']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/log.js b/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/main.svelte b/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/main.svelte
index e381961fe9..bdadbeee82 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/class-frozen-state-object/main.svelte
@@ -1,6 +1,4 @@
 <script>
-	import { log } from './log.js';
-
 	class Counter {
 		count = $state.frozen({ a: 0 });
 	}
@@ -11,6 +9,6 @@
 	try {
 		counter.count.a++
 	} catch (e) {
-		log.push('read only')
+		console.log('read only')
 	}
 }}>{counter.count.a}</button>
diff --git a/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/_config.js b/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/_config.js
index 6ad9dff351..79a0d13bdd 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/_config.js
@@ -1,14 +1,9 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: `<button>0</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		await btn?.click();
@@ -17,6 +12,6 @@ export default test({
 		await btn?.click();
 		assert.htmlEqual(target.innerHTML, `<button>0</button>`);
 
-		assert.deepEqual(log, ['read only', 'read only']);
+		assert.deepEqual(logs, ['read only', 'read only']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/log.js b/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/main.svelte b/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/main.svelte
index 8899e2fdb4..557dc86998 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/class-private-frozen-state-object/main.svelte
@@ -1,6 +1,4 @@
 <script>
-	import { log } from './log.js';
-
 	class Counter {
 		#count = $state.frozen();
 
@@ -22,6 +20,6 @@
 	try {
 		counter.count.a++
 	} catch (e) {
-		log.push('read only')
+		console.log('read only')
 	}
 }}>{counter.count.a}</button>
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/_config.js b/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/_config.js
index ca82a28623..4cf1aea213 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/_config.js
@@ -1,41 +1,36 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	// The component context class instance gets shared between tests, strangely, causing hydration to fail?
 	mode: ['client', 'server'],
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		flushSync(() => {
 			btn?.click();
 		});
 
-		assert.deepEqual(log, [0, 'class trigger false', 'local trigger false', 1]);
+		assert.deepEqual(logs, [0, 'class trigger false', 'local trigger false', 1]);
 
 		flushSync(() => {
 			btn?.click();
 		});
 
-		assert.deepEqual(log, [0, 'class trigger false', 'local trigger false', 1, 2]);
+		assert.deepEqual(logs, [0, 'class trigger false', 'local trigger false', 1, 2]);
 
 		flushSync(() => {
 			btn?.click();
 		});
 
-		assert.deepEqual(log, [0, 'class trigger false', 'local trigger false', 1, 2, 3]);
+		assert.deepEqual(logs, [0, 'class trigger false', 'local trigger false', 1, 2, 3]);
 
 		flushSync(() => {
 			btn?.click();
 		});
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			0,
 			'class trigger false',
 			'local trigger false',
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/log.js b/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/main.svelte b/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/main.svelte
index 6f1c26db04..baa1b4aa86 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-derived-unowned/main.svelte
@@ -11,8 +11,6 @@
 </script>
 
 <script>
-	import { log } from './log.js';
-
 	function increment() {
 		someLogic.trigger();
 	}
@@ -20,13 +18,13 @@
 	let localDerived = $derived(someLogic.someValue > 3);
 
 	$effect(() => {
-		log.push(someLogic.someValue);
+		console.log(someLogic.someValue);
 	});
 	$effect(() => {
-		log.push('class trigger ' + someLogic.isAboveThree)
+		console.log('class trigger ' + someLogic.isAboveThree)
 	});
 	$effect(() => {
-		log.push('local trigger ' + localDerived)
+		console.log('local trigger ' + localDerived)
 	});
 
 </script>
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/_config.js b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/_config.js
index e11107a95c..6d49c0436f 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/_config.js
@@ -1,14 +1,9 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: `<button>0</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		await btn?.click();
@@ -17,6 +12,6 @@ export default test({
 		await btn?.click();
 		assert.htmlEqual(target.innerHTML, `<button>2</button>`);
 
-		assert.deepEqual(log, [undefined]);
+		assert.deepEqual(logs, [undefined]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/log.js b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/main.svelte b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/main.svelte
index 5a0d7b0de2..6409795767 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-2/main.svelte
@@ -1,8 +1,6 @@
 <script>
-	import { log } from './log.js';
-
 	const logger = (obj) => {
-		log.push(obj.count)
+		console.log(obj.count)
 	}
 
 	class Counter {
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/_config.js b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/_config.js
index e11107a95c..6d49c0436f 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/_config.js
@@ -1,14 +1,9 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: `<button>0</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		await btn?.click();
@@ -17,6 +12,6 @@ export default test({
 		await btn?.click();
 		assert.htmlEqual(target.innerHTML, `<button>2</button>`);
 
-		assert.deepEqual(log, [undefined]);
+		assert.deepEqual(logs, [undefined]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/log.js b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/main.svelte b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/main.svelte
index b4e63089b4..f3b355ec74 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager-3/main.svelte
@@ -1,12 +1,10 @@
 <script>
-	import { log } from './log.js';
-
 	class Counter {
 		count = $state();
 		#count;
 
 		constructor(initial_count) {
-			log.push(this.count)
+			console.log(this.count)
 			this.count = initial_count;
 		}
 	}
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/_config.js b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/_config.js
index e6f52509c4..4da3fffc5e 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/_config.js
@@ -1,14 +1,9 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: `<button>0</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		await btn?.click();
@@ -17,6 +12,6 @@ export default test({
 		await btn?.click();
 		assert.htmlEqual(target.innerHTML, `<button>2</button>`);
 
-		assert.deepEqual(log, [100]);
+		assert.deepEqual(logs, [100]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/log.js b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/main.svelte b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/main.svelte
index 1fff8c1fec..2f3226bed8 100644
--- a/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/class-state-init-eager/main.svelte
@@ -1,12 +1,10 @@
 <script>
-	import { log } from './log.js';
-
 	class Counter {
 		count = $state(100);
 		#count;
 
 		constructor(initial_count) {
-			log.push(this.count)
+			console.log(this.count)
 			this.count = initial_count;
 		}
 	}
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-destructure/_config.js b/packages/svelte/tests/runtime-runes/samples/derived-destructure/_config.js
index 6cb0ce442a..e46388068f 100644
--- a/packages/svelte/tests/runtime-runes/samples/derived-destructure/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/derived-destructure/_config.js
@@ -1,28 +1,23 @@
 import { test } from '../../test';
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2, b3] = target.querySelectorAll('button');
-		log.length = 0;
+		logs.length = 0;
 		flushSync(() => {
 			b1.click();
 		});
-		assert.deepEqual(log, ['a', 1]);
-		log.length = 0;
+		assert.deepEqual(logs, ['a', 1]);
+		logs.length = 0;
 		flushSync(() => {
 			b2.click();
 		});
-		assert.deepEqual(log, ['b', 1]);
-		log.length = 0;
+		assert.deepEqual(logs, ['b', 1]);
+		logs.length = 0;
 		flushSync(() => {
 			b3.click();
 		});
-		assert.deepEqual(log, ['c', 1]);
+		assert.deepEqual(logs, ['c', 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-destructure/log.js b/packages/svelte/tests/runtime-runes/samples/derived-destructure/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/derived-destructure/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-destructure/main.svelte b/packages/svelte/tests/runtime-runes/samples/derived-destructure/main.svelte
index be2bad2ab5..4394281fe2 100644
--- a/packages/svelte/tests/runtime-runes/samples/derived-destructure/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/derived-destructure/main.svelte
@@ -1,21 +1,19 @@
 <script>
-	import { log } from './log.js';
-
 	let a = $state(0);
 	let b = $state(0);
 	let c = $state(0);
 	const {a: a1, b: b1, c: c1} = $derived({a, b, c});
 
 	$effect(() => {
-		log.push('a', a1)
+		console.log('a', a1)
 	});
 
 	$effect(() => {
-		log.push('b', b1)
+		console.log('b', b1)
 	});
 
 	$effect(() => {
-		log.push('c', c1)
+		console.log('c', c1)
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/_config.js b/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/_config.js
index 1b6357656a..71c7e40ed5 100644
--- a/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/_config.js
@@ -1,19 +1,15 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
+	mode: ['server'],
 	html: `<button>0</button>`,
 
-	async test({ assert, target, window }) {
+	async test({ assert, target, window, logs }) {
 		const btn = target.querySelector('button');
 		const clickEvent = new window.Event('click', { bubbles: true });
 		await btn?.dispatchEvent(clickEvent);
 
 		assert.htmlEqual(target.innerHTML, `<button>2</button>`);
-		assert.deepEqual(log, ['create_derived']);
+		assert.deepEqual(logs, ['create_derived']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/log.js b/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/main.svelte b/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/main.svelte
index 520765469b..bdedef7197 100644
--- a/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/derived-fn-destructure/main.svelte
@@ -1,9 +1,7 @@
 <script>
-	import {log} from './log.js'
-
   let count = $state(0);
 	function create_derived() {
-		log.push('create_derived');
+		console.log('create_derived');
 		return () => {
 			return {
 				get double() {
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-stale-value/_config.js b/packages/svelte/tests/runtime-runes/samples/derived-stale-value/_config.js
index 275b6711d7..a65249cf14 100644
--- a/packages/svelte/tests/runtime-runes/samples/derived-stale-value/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/derived-stale-value/_config.js
@@ -1,13 +1,8 @@
 import { test } from '../../test';
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 		flushSync(() => {
 			b1.click();
@@ -21,6 +16,6 @@ export default test({
 		flushSync(() => {
 			b1.click();
 		});
-		assert.deepEqual(log, [0, 2, 4]);
+		assert.deepEqual(logs, [0, 2, 4]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-stale-value/log.js b/packages/svelte/tests/runtime-runes/samples/derived-stale-value/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/derived-stale-value/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/derived-stale-value/main.svelte b/packages/svelte/tests/runtime-runes/samples/derived-stale-value/main.svelte
index 91baf81e4a..5fcfe194ae 100644
--- a/packages/svelte/tests/runtime-runes/samples/derived-stale-value/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/derived-stale-value/main.svelte
@@ -1,12 +1,10 @@
 <script>
-	import { log } from './log.js';
-
 	let count = $state(0);
 	const derived = $derived(Math.floor(count / 2));
 	const derived2 = $derived(derived * 2);
 
 	$effect(() => {
-		log.push(derived2);
+		console.log(derived2);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/_config.js b/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/_config.js
index 0645ff4a16..6ad462cddb 100644
--- a/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/_config.js
@@ -1,15 +1,10 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target, window }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 		await btn?.click();
 
-		assert.deepEqual(log, ['works!']);
+		assert.deepEqual(logs, ['works!']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/log.js b/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/main.svelte b/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/main.svelte
index d4f149eb81..4ad48eaec6 100644
--- a/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/destructure-derived-event/main.svelte
@@ -1,9 +1,7 @@
 <script>
-	import { log } from './log.js';
-
 	let structured = $state({
 		handler() {
-			log.push('works!')
+			console.log('works!')
 		}
 	});
 </script>
diff --git a/packages/svelte/tests/runtime-runes/samples/dynamic-transition/_config.js b/packages/svelte/tests/runtime-runes/samples/dynamic-transition/_config.js
index 43c0bd7f86..91524c275e 100644
--- a/packages/svelte/tests/runtime-runes/samples/dynamic-transition/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/dynamic-transition/_config.js
@@ -1,31 +1,26 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 
 		flushSync(() => {
 			b1.click();
 		});
 
-		assert.deepEqual(log, ['transition 2']);
+		assert.deepEqual(logs, ['transition 2']);
 
 		flushSync(() => {
 			b2.click();
 		});
 
-		assert.deepEqual(log, ['transition 2']);
+		assert.deepEqual(logs, ['transition 2']);
 
 		flushSync(() => {
 			b1.click();
 		});
 
-		assert.deepEqual(log, ['transition 2', 'transition 1']);
+		assert.deepEqual(logs, ['transition 2', 'transition 1']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/dynamic-transition/log.js b/packages/svelte/tests/runtime-runes/samples/dynamic-transition/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/dynamic-transition/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/dynamic-transition/main.svelte b/packages/svelte/tests/runtime-runes/samples/dynamic-transition/main.svelte
index 8355a20d71..c075c42c5d 100644
--- a/packages/svelte/tests/runtime-runes/samples/dynamic-transition/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/dynamic-transition/main.svelte
@@ -1,8 +1,6 @@
 <script>
-	import { log } from './log.js';
-
 	function transition1() {
-		log.push('transition 1')
+		console.log('transition 1')
 		return {
 			tick() {
 
@@ -11,7 +9,7 @@
 	}
 
 	function transition2() {
-		log.push('transition 2')
+		console.log('transition 2')
 		return {
 			tick() {
 
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-cleanup/_config.js b/packages/svelte/tests/runtime-runes/samples/effect-cleanup/_config.js
index e61a6bffdd..6a3d9eef77 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-cleanup/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effect-cleanup/_config.js
@@ -1,13 +1,8 @@
 import { test } from '../../test';
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 		flushSync(() => {
 			b1.click();
@@ -15,6 +10,6 @@ export default test({
 		flushSync(() => {
 			b1.click();
 		});
-		assert.deepEqual(log, ['init 0', 'cleanup 2', null, 'init 2', 'cleanup 4', null, 'init 4']);
+		assert.deepEqual(logs, ['init 0', 'cleanup 2', null, 'init 2', 'cleanup 4', null, 'init 4']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-cleanup/log.js b/packages/svelte/tests/runtime-runes/samples/effect-cleanup/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effect-cleanup/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-cleanup/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect-cleanup/main.svelte
index 1a5f7b632f..2cdcfdfb58 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-cleanup/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effect-cleanup/main.svelte
@@ -1,17 +1,15 @@
 <script>
-	import { log } from './log.js';
-
 	let count = $state(0);
 
 	$effect(() => {
 		let double = $derived(count * 2)
 
-		log.push('init ' + double);
+		console.log('init ' + double);
 
 		return function() {
-			log.push('cleanup ' + double);
+			console.log('cleanup ' + double);
 			// @ts-expect-error
-			log.push(this);
+			console.log(this);
 		};
 	})
 </script>
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-2/_config.js b/packages/svelte/tests/runtime-runes/samples/effect-order-2/_config.js
index 302026493f..110bd622a8 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-order-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-2/_config.js
@@ -1,13 +1,8 @@
 import { test } from '../../test';
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 		flushSync(() => {
 			b1.click();
@@ -15,7 +10,7 @@ export default test({
 		flushSync(() => {
 			b1.click();
 		});
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			{ a: 1 },
 			{ b: 1 },
 			{ c: 1 },
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-2/log.js b/packages/svelte/tests/runtime-runes/samples/effect-order-2/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effect-order-2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order-2/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect-order-2/main.svelte
index fb9e9a6c53..7995527d44 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-order-2/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order-2/main.svelte
@@ -1,19 +1,18 @@
 <script>
-	import { log } from './log.js';
 	let a = $state(1);
 	let b = $state(1);
 	let c = $state(1);
 
 	$effect(() => {
-		log.push({ a });
+		console.log({ a });
 	});
 
 	$effect(() => {
-		log.push({ b });
+		console.log({ b });
 	});
 
 	$effect(() => {
-		log.push({ c });
+		console.log({ c });
 	});
 
 	function increment() {
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order/_config.js b/packages/svelte/tests/runtime-runes/samples/effect-order/_config.js
index dbc73d6d50..db7dffc225 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-order/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order/_config.js
@@ -1,13 +1,8 @@
 import { test } from '../../test';
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 		flushSync(() => {
 			b1.click();
@@ -15,6 +10,6 @@ export default test({
 		flushSync(() => {
 			b1.click();
 		});
-		assert.deepEqual(log, ['A', 'B', 'A', 'B', 'A', 'B']);
+		assert.deepEqual(logs, ['A', 'B', 'A', 'B', 'A', 'B']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order/log.js b/packages/svelte/tests/runtime-runes/samples/effect-order/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effect-order/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-order/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect-order/main.svelte
index 7c0a555f02..54d86acca9 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-order/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effect-order/main.svelte
@@ -1,17 +1,15 @@
 <script>
-	import { log } from './log.js';
-
 	let s = $state(0);
 	let d = $derived(s)
 
 	$effect(() => {
 		s;
-		log.push('A')
+		console.log('A')
 	})
 
 	$effect(() => {
 		d;
-		log.push('B')
+		console.log('B')
 	})
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-root-2/_config.js b/packages/svelte/tests/runtime-runes/samples/effect-root-2/_config.js
index f6d99a0f5d..4c7aeb1ad1 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-root-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effect-root-2/_config.js
@@ -1,31 +1,26 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 
 		flushSync(() => {
 			b1.click();
 		});
 
-		assert.deepEqual(log, [0]);
+		assert.deepEqual(logs, [0]);
 
 		flushSync(() => {
 			b2.click();
 		});
 
-		assert.deepEqual(log, [0, 'cleanup']);
+		assert.deepEqual(logs, [0, 'cleanup']);
 
 		flushSync(() => {
 			b1.click();
 		});
 
-		assert.deepEqual(log, [0, 'cleanup']);
+		assert.deepEqual(logs, [0, 'cleanup']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-root-2/log.js b/packages/svelte/tests/runtime-runes/samples/effect-root-2/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effect-root-2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-root-2/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect-root-2/main.svelte
index 591975ce54..756053b03a 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-root-2/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effect-root-2/main.svelte
@@ -1,11 +1,9 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state(0);
 
 	const cleanup = $effect.root(() => {
-		log.push(x);
-		return () => log.push('cleanup');
+		console.log(x);
+		return () => console.log('cleanup');
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-root/_config.js b/packages/svelte/tests/runtime-runes/samples/effect-root/_config.js
index 1a2afc898f..fe2a8bb499 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-root/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effect-root/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2, b3] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -15,19 +10,19 @@ export default test({
 			b2.click();
 		});
 
-		assert.deepEqual(log, [0, 1]);
+		assert.deepEqual(logs, [0, 1]);
 
 		flushSync(() => {
 			b3.click();
 		});
 
-		assert.deepEqual(log, [0, 1, 'cleanup 1', 'cleanup 2']);
+		assert.deepEqual(logs, [0, 1, 'cleanup 1', 'cleanup 2']);
 
 		flushSync(() => {
 			b1.click();
 			b2.click();
 		});
 
-		assert.deepEqual(log, [0, 1, 'cleanup 1', 'cleanup 2']);
+		assert.deepEqual(logs, [0, 1, 'cleanup 1', 'cleanup 2']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-root/log.js b/packages/svelte/tests/runtime-runes/samples/effect-root/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effect-root/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effect-root/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect-root/main.svelte
index f7e8275aae..65abb24374 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect-root/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effect-root/main.svelte
@@ -1,22 +1,20 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state(0);
 	let y = $state(0);
 
 	const cleanup = $effect.root(() => {
 		$effect(() => {
-			log.push(x);
+			console.log(x);
 		});
 
 		const nested_cleanup = $effect.root(() => {
 			return () => {
-				log.push('cleanup 2');
+				console.log('cleanup 2');
 			}
 		});
 
 		return () => {
-			log.push('cleanup 1');
+			console.log('cleanup 1');
 			nested_cleanup();
 		}
 	});
diff --git a/packages/svelte/tests/runtime-runes/samples/effect/_config.js b/packages/svelte/tests/runtime-runes/samples/effect/_config.js
index 1e6333bdeb..384356dc07 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effect/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, [0, 1]);
+		assert.deepEqual(logs, [0, 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/effect/log.js b/packages/svelte/tests/runtime-runes/samples/effect/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effect/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effect/main.svelte b/packages/svelte/tests/runtime-runes/samples/effect/main.svelte
index 6ac6c4b41b..56c130a1a0 100644
--- a/packages/svelte/tests/runtime-runes/samples/effect/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effect/main.svelte
@@ -1,11 +1,9 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state(0);
 	let y = $state(0);
 
 	$effect(() => {
-		log.push(x);
+		console.log(x);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/effects-order/_config.js b/packages/svelte/tests/runtime-runes/samples/effects-order/_config.js
index 25b05af207..e4ca2d72a6 100644
--- a/packages/svelte/tests/runtime-runes/samples/effects-order/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/effects-order/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, ['first0', 'second0', 'first1', 'second1']);
+		assert.deepEqual(logs, ['first0', 'second0', 'first1', 'second1']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/effects-order/log.js b/packages/svelte/tests/runtime-runes/samples/effects-order/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/effects-order/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/effects-order/main.svelte b/packages/svelte/tests/runtime-runes/samples/effects-order/main.svelte
index 5d8973be35..1fb1c44e8e 100644
--- a/packages/svelte/tests/runtime-runes/samples/effects-order/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/effects-order/main.svelte
@@ -1,15 +1,13 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state(0);
 	let y = $state(0);
 
 	$effect.pre(() => {
-		log.push('first'+x);
+		console.log('first'+x);
 	});
 
 	$effect(() => {
-		log.push('second'+x);
+		console.log('second'+x);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/_config.js
index 262240f5f3..b8cfb1e584 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -15,6 +10,6 @@ export default test({
 		});
 
 		await Promise.resolve();
-		assert.deepEqual(log, ['clicked button']);
+		assert.deepEqual(logs, ['clicked button']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/main.svelte
index dc5fdd214e..2a18005538 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-2/main.svelte
@@ -1,8 +1,5 @@
-<script>
-	import { log } from './log.js';
-</script>
-<div on:click={(e) => { log.push('clicked div') }}>
-	<button onclick={(e) => { log.push('clicked button'); e.stopPropagation() }}>
+<div on:click={(e) => { console.log('clicked div') }}>
+	<button onclick={(e) => { console.log('clicked button'); e.stopPropagation() }}>
 		Button
 	</button>
 </div>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/_config.js
index 262240f5f3..b8cfb1e584 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -15,6 +10,6 @@ export default test({
 		});
 
 		await Promise.resolve();
-		assert.deepEqual(log, ['clicked button']);
+		assert.deepEqual(logs, ['clicked button']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/main.svelte
index 4cead08260..d39bdf42c3 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-3/main.svelte
@@ -1,11 +1,10 @@
 <script>
-	import { log } from './log.js';
 	const action = () => {}
 </script>
-<div use:action onclick={() => log.push('clicked container')} onkeydown={() => {}}>
-	<div use:action onclick={(e) => { log.push('clicked div 1') }}>
-		<div onclick={(e) => { log.push('clicked div 2') }}>
-			<button onclick={(e) => { log.push('clicked button'); e.stopPropagation() }}>
+<div use:action onclick={() => console.log('clicked container')} onkeydown={() => {}}>
+	<div use:action onclick={(e) => { console.log('clicked div 1') }}>
+		<div onclick={(e) => { console.log('clicked div 2') }}>
+			<button onclick={(e) => { console.log('clicked button'); e.stopPropagation() }}>
 				Button
 			</button>
 		</div>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/_config.js
index 9830e74646..d253b9b6fc 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [btn1, btn2] = target.querySelectorAll('button');
 
 		btn1?.click();
 		await Promise.resolve();
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'button main',
 			'div main 1',
 			'div main 2',
@@ -21,10 +16,10 @@ export default test({
 			'window sub'
 		]);
 
-		log.length = 0;
+		logs.length = 0;
 		btn2?.click();
 		await Promise.resolve();
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'button sub',
 			'document main',
 			'document sub',
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/main.svelte
index 9fa1484907..9697540e18 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/main.svelte
@@ -1,13 +1,12 @@
 <script>
-	import { log } from "./log";
 	import Sub from "./sub.svelte";
 </script>
 
-<svelte:window onclick="{() => log.push('window main')}" />
-<svelte:document onclick="{() => log.push('document main')}" />
+<svelte:window onclick="{() => console.log('window main')}" />
+<svelte:document onclick="{() => console.log('document main')}" />
 
-<div on:click={() => log.push('div main 1')} on:click={() => log.push('div main 2')}>
-	<button onclick={() => log.push('button main')}>main</button>
+<div on:click={() => console.log('div main 1')} on:click={() => console.log('div main 2')}>
+	<button onclick={() => console.log('button main')}>main</button>
 </div>
 
 <Sub />
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/sub.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/sub.svelte
index c6c900b8b4..a7dd74a4c5 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/sub.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-4/sub.svelte
@@ -1,8 +1,4 @@
-<script>
-	import { log } from "./log";
-</script>
+<svelte:window onclick={() => console.log('window sub')} />
+<svelte:document onclick={() => console.log('document sub')} />
 
-<svelte:window onclick={() => log.push('window sub')} />
-<svelte:document onclick={() => log.push('document sub')} />
-
-<button onclick={() => log.push('button sub')}>sub</button>
+<button onclick={() => console.log('button sub')}>sub</button>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/_config.js
index fcbb0dbe2a..6fa7b732bf 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		btn?.click();
 		await Promise.resolve();
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'button onclick',
 			'button on:click',
 			'inner div on:click',
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/main.svelte
index 438ecf5dc3..6df18bff43 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-5/main.svelte
@@ -1,9 +1,5 @@
-<script>
-	import { log } from "./log";
-</script>
-
-<div onclick={() => log.push('outer div onclick')}>
-	<div on:click={() => log.push('inner div on:click')}>
-		<button onclick={() => log.push('button onclick')} on:click={() => log.push('button on:click')}>main</button>
+<div onclick={() => console.log('outer div onclick')}>
+	<div on:click={() => console.log('inner div on:click')}>
+		<button onclick={() => console.log('button onclick')} on:click={() => console.log('button on:click')}>main</button>
 	</div>
 </div>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/_config.js
index bc16bf031f..af62498171 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/_config.js
@@ -1,16 +1,11 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		btn?.click();
 		await Promise.resolve();
-		assert.deepEqual(log, ['method']);
+		assert.deepEqual(logs, ['method']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/main.svelte
index 0a365990ec..d1696a04c1 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-6/main.svelte
@@ -1,9 +1,7 @@
 <script>
-	import { log } from './log.js';
-
 	let method = $state('method');
 	function submitPay() {
-		log.push(method);
+		console.log(method);
 	}
 	let methods = [{method:1}];
 </script>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/_config.js
index 69f1788171..3d3377b125 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/_config.js
@@ -1,16 +1,11 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
 		btn?.click();
 		await Promise.resolve();
-		assert.deepEqual(log, ['div onclickcapture', 'button onclick']);
+		assert.deepEqual(logs, ['div onclickcapture', 'button onclick']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/main.svelte
index b79cc9008f..55f1608e77 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation-7/main.svelte
@@ -1,7 +1,3 @@
-<script>
-	import { log } from "./log";
-</script>
-
-<div onclickcapture={() => log.push('div onclickcapture')}>
-	<button onclick={() => log.push('button onclick')}>main</button>
+<div onclickcapture={() => console.log('div onclickcapture')}>
+	<button onclick={() => console.log('button onclick')}>main</button>
 </div>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/_config.js
index b1f5931a1e..bbe67d1bed 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -15,7 +10,7 @@ export default test({
 		});
 
 		await Promise.resolve();
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'clicked button',
 			'clicked div 2',
 			'clicked div 1',
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/log.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/main.svelte
index 8d3ac9fcc0..d1f767288a 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-delegation/main.svelte
@@ -1,11 +1,10 @@
 <script>
-	import { log } from './log.js';
 	const action = () => {}
 </script>
-<div use:action onclick={() => log.push('clicked container')} onkeydown={() => {}}>
-	<div use:action onclick={(e) => { log.push('clicked div 1') }}>
-		<div onclick={(e) => { log.push('clicked div 2') }}>
-			<button onclick={(e) => { log.push('clicked button') }}>
+<div use:action onclick={() => console.log('clicked container')} onkeydown={() => {}}>
+	<div use:action onclick={(e) => { console.log('clicked div 1') }}>
+		<div onclick={(e) => { console.log('clicked div 2') }}>
+			<button onclick={(e) => { console.log('clicked button') }}>
 				Button
 			</button>
 		</div>
diff --git a/packages/svelte/tests/runtime-runes/samples/event-prop-reference/_config.js b/packages/svelte/tests/runtime-runes/samples/event-prop-reference/_config.js
index 3b801f6b7b..4d387569ee 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-prop-reference/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/event-prop-reference/_config.js
@@ -1,21 +1,16 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
 	get props() {
 		return { item: { name: 'Dominic' } };
 	},
 
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 
 		b1?.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, ['Dominic']);
+		assert.deepEqual(logs, ['Dominic']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/event-prop-reference/log.js b/packages/svelte/tests/runtime-runes/samples/event-prop-reference/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/event-prop-reference/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/event-prop-reference/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-prop-reference/main.svelte
index 697338d97b..258ef6046c 100644
--- a/packages/svelte/tests/runtime-runes/samples/event-prop-reference/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/event-prop-reference/main.svelte
@@ -1,10 +1,8 @@
 <script>
-	import { log } from './log.js';
-
 	let { item } = $props();
 
 	function onclick() {
-		log.push(item?.name);
+		console.log(item?.name);
 	}
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/inspect-derived-2/_config.js b/packages/svelte/tests/runtime-runes/samples/inspect-derived-2/_config.js
index 0e6cf85884..9474397f7f 100644
--- a/packages/svelte/tests/runtime-runes/samples/inspect-derived-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/inspect-derived-2/_config.js
@@ -1,30 +1,12 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	compileOptions: {
 		dev: true
 	},
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert, target }) {
+
+	async test({ assert, target, logs }) {
 		const button = target.querySelector('button');
 
 		flushSync(() => {
@@ -32,7 +14,7 @@ export default test({
 		});
 
 		assert.htmlEqual(target.innerHTML, `<button>update</button>\n1`);
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'init',
 			{
 				data: {
diff --git a/packages/svelte/tests/runtime-runes/samples/inspect-multiple/_config.js b/packages/svelte/tests/runtime-runes/samples/inspect-multiple/_config.js
index be3c1988bd..fc9a0cda9a 100644
--- a/packages/svelte/tests/runtime-runes/samples/inspect-multiple/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/inspect-multiple/_config.js
@@ -1,34 +1,16 @@
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	compileOptions: {
 		dev: true
 	},
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert, target }) {
+
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, ['init', 0, 0, 'update', 1, 0, 'update', 1, 1]);
+		assert.deepEqual(logs, ['init', 0, 0, 'update', 1, 0, 'update', 1, 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/inspect-nested-state/_config.js b/packages/svelte/tests/runtime-runes/samples/inspect-nested-state/_config.js
index 32c9e98296..e4d9fb5013 100644
--- a/packages/svelte/tests/runtime-runes/samples/inspect-nested-state/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/inspect-nested-state/_config.js
@@ -1,34 +1,16 @@
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	compileOptions: {
 		dev: true
 	},
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert, target }) {
+
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 		b1.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'init',
 			{ x: { count: 0 } },
 			[{ count: 0 }],
diff --git a/packages/svelte/tests/runtime-runes/samples/inspect-new-property/_config.js b/packages/svelte/tests/runtime-runes/samples/inspect-new-property/_config.js
index 5e5150bf0d..a85972a0f9 100644
--- a/packages/svelte/tests/runtime-runes/samples/inspect-new-property/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/inspect-new-property/_config.js
@@ -1,33 +1,15 @@
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	compileOptions: {
 		dev: true
 	},
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert, target }) {
+
+	async test({ assert, target, logs }) {
 		const [btn] = target.querySelectorAll('button');
 		btn.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, ['init', {}, 'init', [], 'update', { x: 'hello' }, 'update', ['hello']]);
+		assert.deepEqual(logs, ['init', {}, 'init', [], 'update', { x: 'hello' }, 'update', ['hello']]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/inspect-trace/_config.js b/packages/svelte/tests/runtime-runes/samples/inspect-trace/_config.js
index 43b0915426..7bb71adafb 100644
--- a/packages/svelte/tests/runtime-runes/samples/inspect-trace/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/inspect-trace/_config.js
@@ -1,37 +1,19 @@
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	compileOptions: {
 		dev: true
 	},
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert, target }) {
-		assert.deepEqual(log, []);
+
+	async test({ assert, target, logs }) {
+		assert.deepEqual(logs, []);
 
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.ok(log[0].stack.startsWith('Error:') && log[0].stack.includes('HTMLButtonElement.'));
-		assert.deepEqual(log[1], 1);
+		assert.ok(logs[0].stack.startsWith('Error:') && logs[0].stack.includes('HTMLButtonElement.'));
+		assert.deepEqual(logs[1], 1);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/inspect/_config.js b/packages/svelte/tests/runtime-runes/samples/inspect/_config.js
index 1f63249e31..09a921abee 100644
--- a/packages/svelte/tests/runtime-runes/samples/inspect/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/inspect/_config.js
@@ -1,34 +1,16 @@
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	compileOptions: {
 		dev: true
 	},
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert, target }) {
+
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, ['init', 0, 'update', 1]);
+		assert.deepEqual(logs, ['init', 0, 'update', 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/Item.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/Item.svelte
index 5375195617..f427b849e3 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/Item.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/Item.svelte
@@ -1,23 +1,21 @@
 <script>
-	import { log } from './log.js';
-
 	let { index, n } = $props();
 
 	function logRender () {
-		log.push(`${index}: render ${n}`);
+		console.log(`${index}: render ${n}`);
 		return index;
 	}
 
 	$effect.pre(() => {
-		log.push(`${index}: $effect.pre ${n}`);
+		console.log(`${index}: $effect.pre ${n}`);
 	});
 
 	$effect.pre(() => {
-		log.push(`${index}: $effect.pre (2) ${n}`);
+		console.log(`${index}: $effect.pre (2) ${n}`);
 	});
 
 	$effect(() => {
-		log.push(`${index}: $effect ${n}`);
+		console.log(`${index}: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/_config.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/_config.js
index 2667fff13c..b0271da3f1 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	get props() {
 		return { n: 0 };
 	},
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, component }) {
-		assert.deepEqual(log, [
+	async test({ assert, component, logs }) {
+		assert.deepEqual(logs, [
 			'parent: $effect.pre 0',
 			'parent: $effect.pre (2) 0',
 			'parent: render 0',
@@ -30,11 +25,11 @@ export default test({
 			'parent: $effect 0'
 		]);
 
-		log.length = 0;
+		logs.length = 0;
 
 		component.n += 1;
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'parent: $effect.pre 1',
 			'parent: $effect.pre (2) 1',
 			'parent: render 1',
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/log.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/main.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/main.svelte
index cc21df4f1b..e5dd43494c 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-2/main.svelte
@@ -1,24 +1,23 @@
 <script>
 	import Item from './Item.svelte';
-	import { log } from './log.js';
 
 	let { n = 0 } = $props();
 
 	function logRender () {
-		log.push(`parent: render ${n}`);
+		console.log(`parent: render ${n}`);
 		return 'parent';
 	}
 
 	$effect.pre(() => {
-		log.push(`parent: $effect.pre ${n}`);
+		console.log(`parent: $effect.pre ${n}`);
 	});
 
 	$effect.pre(() => {
-		log.push(`parent: $effect.pre (2) ${n}`);
+		console.log(`parent: $effect.pre (2) ${n}`);
 	});
 
 	$effect(() => {
-		log.push(`parent: $effect ${n}`);
+		console.log(`parent: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/Item.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/Item.svelte
index 8719c578f9..de1573539e 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/Item.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/Item.svelte
@@ -1,19 +1,17 @@
 <script>
-	import { log } from './log.js';
-
 	let { index, n } = $props();
 
 	function logRender () {
-		log.push(`${index}: render ${n}`);
+		console.log(`${index}: render ${n}`);
 		return index;
 	}
 
 	$effect.pre(() => {
-		log.push(`${index}: $effect.pre ${n}`);
+		console.log(`${index}: $effect.pre ${n}`);
 	});
 
 	$effect(() => {
-		log.push(`${index}: $effect ${n}`);
+		console.log(`${index}: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/_config.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/_config.js
index e528189597..04cfa4b0d5 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	get props() {
 		return { n: 0 };
 	},
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, component }) {
-		assert.deepEqual(log, [
+	async test({ assert, component, logs }) {
+		assert.deepEqual(logs, [
 			'parent: render 0',
 			'1: $effect.pre 0',
 			'1: render 0',
@@ -25,11 +20,11 @@ export default test({
 			'parent: $effect 0'
 		]);
 
-		log.length = 0;
+		logs.length = 0;
 
 		component.n += 1;
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'parent: render 1',
 			'1: $effect.pre 1',
 			'1: render 1',
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/log.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/main.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/main.svelte
index 57d85095d5..a029b9f18a 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-3/main.svelte
@@ -1,16 +1,15 @@
 <script>
 	import Item from './Item.svelte';
-	import { log } from './log.js';
 
 	let { n = 0 } = $props();
 
 	function logRender () {
-		log.push(`parent: render ${n}`);
+		console.log(`parent: render ${n}`);
 		return 'parent';
 	}
 
 	$effect(() => {
-		log.push(`parent: $effect ${n}`);
+		console.log(`parent: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/Item.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/Item.svelte
index 2e9dc09c7a..cffeaf41b5 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/Item.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/Item.svelte
@@ -1,23 +1,21 @@
 <script>
-	import { log } from './log.js';
-
 	let { index, n } = $props();
 
 	function logRender () {
-		log.push(`${index}: render ${n}`);
+		console.log(`${index}: render ${n}`);
 		return index;
 	}
 
 	$effect.pre(() => {
-		log.push(`${index}: $effect.pre ${n}`);
+		console.log(`${index}: $effect.pre ${n}`);
 
 		$effect.pre(() => {
-			log.push(`${index}: nested $effect.pre ${n}`);
+			console.log(`${index}: nested $effect.pre ${n}`);
 		});
 	});
 
 	$effect(() => {
-		log.push(`${index}: $effect ${n}`);
+		console.log(`${index}: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/_config.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/_config.js
index 62a4b85546..d0e27957c5 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	get props() {
 		return { n: 0 };
 	},
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, component }) {
-		assert.deepEqual(log, [
+	async test({ assert, component, logs }) {
+		assert.deepEqual(logs, [
 			'parent: $effect.pre 0',
 			'parent: nested $effect.pre 0',
 			'parent: render 0',
@@ -30,11 +25,11 @@ export default test({
 			'parent: $effect 0'
 		]);
 
-		log.length = 0;
+		logs.length = 0;
 
 		component.n += 1;
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'parent: $effect.pre 1',
 			'parent: nested $effect.pre 1',
 			'parent: render 1',
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/log.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/main.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/main.svelte
index d9b83f837c..91cce1937b 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-4/main.svelte
@@ -1,24 +1,23 @@
 <script>
 	import Item from './Item.svelte';
-	import { log } from './log.js';
 
 	let { n = 0 } = $props();
 
 	function logRender () {
-		log.push(`parent: render ${n}`);
+		console.log(`parent: render ${n}`);
 		return 'parent';
 	}
 
 	$effect.pre(() => {
-		log.push(`parent: $effect.pre ${n}`);
+		console.log(`parent: $effect.pre ${n}`);
 
 		$effect.pre(() => {
-			log.push(`parent: nested $effect.pre ${n}`);
+			console.log(`parent: nested $effect.pre ${n}`);
 		});
 	});
 
 	$effect(() => {
-		log.push(`parent: $effect ${n}`);
+		console.log(`parent: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/_config.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/_config.js
index bc62b4f2c9..54212a580a 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/_config.js
@@ -1,21 +1,16 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	get props() {
 		return { n: 0 };
 	},
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, component }) {
-		assert.deepEqual(log, ['$effect.pre 0', 'another $effect.pre 1', 'render n0', 'render i1']);
+	async test({ assert, component, logs }) {
+		assert.deepEqual(logs, ['$effect.pre 0', 'another $effect.pre 1', 'render n0', 'render i1']);
 
-		log.length = 0;
+		logs.length = 0;
 		component.n += 1;
 
-		assert.deepEqual(log, ['$effect.pre 1', 'another $effect.pre 2', 'render n1', 'render i2']);
+		assert.deepEqual(logs, ['$effect.pre 1', 'another $effect.pre 2', 'render n1', 'render i2']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/log.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/main.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/main.svelte
index ecbd9321bf..a648f04865 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children-5/main.svelte
@@ -1,17 +1,20 @@
 <script>
 	import { untrack } from 'svelte';
-	import { log } from './log.js';
+
 	let { n = 0 } = $props();
 	let i = $state(0);
+
 	function logRender(i) {
-		log.push(`render ${i}`);
+		console.log(`render ${i}`);
 	}
+
 	$effect.pre(() => {
-		log.push(`$effect.pre ${n}`);
+		console.log(`$effect.pre ${n}`);
 		untrack(() => i++)
 	});
+
 	$effect.pre(() => {
-		log.push('another $effect.pre '+ i);
+		console.log('another $effect.pre '+ i);
 	})
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/Item.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/Item.svelte
index 8719c578f9..de1573539e 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/Item.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/Item.svelte
@@ -1,19 +1,17 @@
 <script>
-	import { log } from './log.js';
-
 	let { index, n } = $props();
 
 	function logRender () {
-		log.push(`${index}: render ${n}`);
+		console.log(`${index}: render ${n}`);
 		return index;
 	}
 
 	$effect.pre(() => {
-		log.push(`${index}: $effect.pre ${n}`);
+		console.log(`${index}: $effect.pre ${n}`);
 	});
 
 	$effect(() => {
-		log.push(`${index}: $effect ${n}`);
+		console.log(`${index}: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/_config.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/_config.js
index 0c7118df75..affe03c344 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	get props() {
 		return { n: 0 };
 	},
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, component }) {
-		assert.deepEqual(log, [
+	async test({ assert, component, logs }) {
+		assert.deepEqual(logs, [
 			'parent: $effect.pre 0',
 			'parent: render 0',
 			'1: $effect.pre 0',
@@ -26,11 +21,11 @@ export default test({
 			'parent: $effect 0'
 		]);
 
-		log.length = 0;
+		logs.length = 0;
 
 		component.n += 1;
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'parent: $effect.pre 1',
 			'parent: render 1',
 			'1: $effect.pre 1',
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/log.js b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/main.svelte b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/main.svelte
index 9cfa2b834c..f3918be07c 100644
--- a/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/lifecycle-render-order-for-children/main.svelte
@@ -1,20 +1,19 @@
 <script>
 	import Item from './Item.svelte';
-	import { log } from './log.js';
 
 	let { n = 0 } = $props();
 
 	function logRender () {
-		log.push(`parent: render ${n}`);
+		console.log(`parent: render ${n}`);
 		return 'parent';
 	}
 
 	$effect.pre(() => {
-		log.push(`parent: $effect.pre ${n}`);
+		console.log(`parent: $effect.pre ${n}`);
 	});
 
 	$effect(() => {
-		log.push(`parent: $effect ${n}`);
+		console.log(`parent: $effect ${n}`);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/_config.js b/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/_config.js
index 6de94097f2..a8c16b7008 100644
--- a/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -15,7 +10,7 @@ export default test({
 		});
 
 		await Promise.resolve();
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'top level',
 			'inner',
 			0,
diff --git a/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/log.js b/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/main.svelte b/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/main.svelte
index a7c6625dc1..47c98e5499 100644
--- a/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/nested-effect-conflict/main.svelte
@@ -1,18 +1,17 @@
 <script>
-	import { log } from './log.js';
 	let c = $state({ a: 0 });
 
 	$effect(() => {
-		log.push('top level')
-			$effect(() => {
-					if (c) {
-							$effect(() => {
-								log.push('inner',c.a);
-									return () => log.push('destroy inner', c?.a);
-							});
-					}
-					return () => log.push('destroy outer', c?.a);
-			})
+		console.log('top level')
+		$effect(() => {
+			if (c) {
+				$effect(() => {
+					console.log('inner',c.a);
+					return () => console.log('destroy inner', c?.a);
+				});
+			}
+			return () => console.log('destroy outer', c?.a);
+		});
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/nested-script-tag/_config.js b/packages/svelte/tests/runtime-runes/samples/nested-script-tag/_config.js
index 051f54889d..843805993f 100644
--- a/packages/svelte/tests/runtime-runes/samples/nested-script-tag/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/nested-script-tag/_config.js
@@ -1,28 +1,9 @@
 import { test } from '../../test';
 
-/**
- * @type {any[]}
- */
-let log;
-/**
- * @type {typeof console.log}}
- */
-let original_log;
-
 export default test({
 	mode: ['client'],
 
-	before_test() {
-		log = [];
-		original_log = console.log;
-		console.log = (...v) => {
-			log.push(...v);
-		};
-	},
-	after_test() {
-		console.log = original_log;
-	},
-	async test({ assert }) {
-		assert.deepEqual(log, ['init']);
+	async test({ assert, logs }) {
+		assert.deepEqual(logs, ['init']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-3/_config.js b/packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-3/_config.js
index b4e2084871..6fc699efb6 100644
--- a/packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-3/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/non-local-mutation-with-binding-3/_config.js
@@ -1,15 +1,9 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
 
-/** @type {typeof console.warn} */
-let warn;
-
 /** @type {typeof console.trace} */
 let trace;
 
-/** @type {any[]} */
-let warnings = [];
-
 export default test({
 	html: `<button>clicks: 0</button><button>clicks: 0</button>`,
 
@@ -18,24 +12,16 @@ export default test({
 	},
 
 	before_test: () => {
-		warn = console.warn;
 		trace = console.trace;
 
-		console.warn = (...args) => {
-			warnings.push(...args);
-		};
-
 		console.trace = () => {};
 	},
 
 	after_test: () => {
-		console.warn = warn;
 		console.trace = trace;
-
-		warnings = [];
 	},
 
-	async test({ assert, target }) {
+	async test({ assert, target, warnings }) {
 		const [btn1, btn2] = target.querySelectorAll('button');
 
 		flushSync(() => btn1.click());
diff --git a/packages/svelte/tests/runtime-runes/samples/nullish-operator/_config.js b/packages/svelte/tests/runtime-runes/samples/nullish-operator/_config.js
index 11e729c3c7..940af7980e 100644
--- a/packages/svelte/tests/runtime-runes/samples/nullish-operator/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/nullish-operator/_config.js
@@ -1,14 +1,9 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert }) {
+	async test({ assert, logs }) {
 		await Promise.resolve();
 		await Promise.resolve();
-		assert.deepEqual(log, ['a1: ', true, 'b1: ', true]);
+		assert.deepEqual(logs, ['a1: ', true, 'b1: ', true]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/nullish-operator/log.js b/packages/svelte/tests/runtime-runes/samples/nullish-operator/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/nullish-operator/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/nullish-operator/main.svelte b/packages/svelte/tests/runtime-runes/samples/nullish-operator/main.svelte
index a98c4b4f39..801d568ffb 100644
--- a/packages/svelte/tests/runtime-runes/samples/nullish-operator/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/nullish-operator/main.svelte
@@ -1,15 +1,13 @@
 <script>
-	import { log } from './log.js';
-
 	let a1 = $state();
 	let b1 = $state();
 
 	$effect(() => {
-		log.push('a1: ', a1);
+		console.log('a1: ', a1);
 	});
 
 	$effect(() => {
-		log.push('b1: ', b1);
+		console.log('b1: ', b1);
 	});
 
 	a();
diff --git a/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/_config.js b/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/_config.js
index a8fa909b33..ab4b05e9cf 100644
--- a/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/_config.js
@@ -1,13 +1,8 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -17,7 +12,7 @@ export default test({
 			b1.click();
 		});
 
-		assert.deepEqual(log, [
+		assert.deepEqual(logs, [
 			'Outer Effect Start (0)',
 			'Inner Effect (0)',
 			'Outer Effect End (0)',
diff --git a/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/log.js b/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/main.svelte b/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/main.svelte
index 19dff4097d..798d29bb24 100644
--- a/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/pre-effect-ordering/main.svelte
@@ -1,6 +1,4 @@
 <script>
-    import { log } from './log.js';
-
 	let count = $state(0);
 
 	function increment() {
@@ -8,13 +6,13 @@
 	}
 
 	$effect.pre(() => {
-		log.push(`Outer Effect Start (${count})`)
+		console.log(`Outer Effect Start (${count})`)
 
 		$effect.pre(() => {
-			log.push(`Inner Effect (${count})`)
+			console.log(`Inner Effect (${count})`)
 		});
 
-		log.push(`Outer Effect End (${count})`)
+		console.log(`Outer Effect End (${count})`)
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/pre-effect/_config.js b/packages/svelte/tests/runtime-runes/samples/pre-effect/_config.js
index 1e6333bdeb..384356dc07 100644
--- a/packages/svelte/tests/runtime-runes/samples/pre-effect/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/pre-effect/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, [0, 1]);
+		assert.deepEqual(logs, [0, 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/pre-effect/log.js b/packages/svelte/tests/runtime-runes/samples/pre-effect/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/pre-effect/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/pre-effect/main.svelte b/packages/svelte/tests/runtime-runes/samples/pre-effect/main.svelte
index 5245340373..18f2610f6d 100644
--- a/packages/svelte/tests/runtime-runes/samples/pre-effect/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/pre-effect/main.svelte
@@ -1,11 +1,9 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state(0);
 	let y = $state(0);
 
 	$effect.pre(() => {
-		log.push(x);
+		console.log(x);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/props-derived-2/Item.svelte b/packages/svelte/tests/runtime-runes/samples/props-derived-2/Item.svelte
index 1c2c6e7182..7d5e6cea08 100644
--- a/packages/svelte/tests/runtime-runes/samples/props-derived-2/Item.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/props-derived-2/Item.svelte
@@ -1,9 +1,7 @@
 <script>
-	import { log } from './log.js';
-
 	const {active} = $props();
 	$effect.pre(() => {
-		log.push('active changed', active)
+		console.log('active changed', active)
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/props-derived-2/_config.js b/packages/svelte/tests/runtime-runes/samples/props-derived-2/_config.js
index 32b526c9a8..d1518559b8 100644
--- a/packages/svelte/tests/runtime-runes/samples/props-derived-2/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/props-derived-2/_config.js
@@ -1,19 +1,14 @@
 import { test } from '../../test';
 import { flushSync } from 'svelte';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
-		log.length = 0;
+	async test({ assert, target, logs }) {
+		logs.length = 0;
 
 		const input = /** @type {HTMLInputElement} */ (target.querySelector('input'));
 		input.value = '1';
 		flushSync(() => input.dispatchEvent(new window.Event('input')));
 
-		assert.deepEqual(log, ['active changed', false, 'active changed', true]);
+		assert.deepEqual(logs, ['active changed', false, 'active changed', true]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/props-derived-2/log.js b/packages/svelte/tests/runtime-runes/samples/props-derived-2/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/props-derived-2/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/props-equality/main.svelte b/packages/svelte/tests/runtime-runes/samples/props-equality/main.svelte
index 7c7ee0c31e..9594cc406c 100644
--- a/packages/svelte/tests/runtime-runes/samples/props-equality/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/props-equality/main.svelte
@@ -11,7 +11,7 @@
 {/each}
 
 {#each items as item (item.name)}
-	<Item {item} {items} onclick={() => {console.log('hello'); item.name = item.name + '+'}} />
+	<Item {item} {items} onclick={() => item.name = item.name + '+'} />
 {/each}
 
 {#each items as item}
diff --git a/packages/svelte/tests/runtime-runes/samples/readonly-state/_config.js b/packages/svelte/tests/runtime-runes/samples/readonly-state/_config.js
index 1e6333bdeb..384356dc07 100644
--- a/packages/svelte/tests/runtime-runes/samples/readonly-state/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/readonly-state/_config.js
@@ -1,17 +1,12 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const [b1, b2] = target.querySelectorAll('button');
 		b1.click();
 		b2.click();
 		await Promise.resolve();
 
-		assert.deepEqual(log, [0, 1]);
+		assert.deepEqual(logs, [0, 1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/readonly-state/log.js b/packages/svelte/tests/runtime-runes/samples/readonly-state/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/readonly-state/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/readonly-state/main.svelte b/packages/svelte/tests/runtime-runes/samples/readonly-state/main.svelte
index 1dde3104be..e92a479c93 100644
--- a/packages/svelte/tests/runtime-runes/samples/readonly-state/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/readonly-state/main.svelte
@@ -1,11 +1,9 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state.frozen(0);
 	let y = $state.frozen(0);
 
 	$effect(() => {
-		log.push(x);
+		console.log(x);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/_config.js b/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/_config.js
index ffb50aaa53..01c8db2143 100644
--- a/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/_config.js
@@ -6,13 +6,8 @@ export default test({
 		<button>toggle</button>
 		<button>increase count</button>
 	`,
-	props: {
-		get log() {
-			return [];
-		}
-	},
 
-	async test({ assert, target, component }) {
+	async test({ assert, target, logs }) {
 		const [toggle, increment] = target.querySelectorAll('button');
 
 		await increment?.click();
@@ -24,7 +19,7 @@ export default test({
 				<button>increase count</button>
 			`
 		);
-		assert.deepEqual(component.log, []);
+		assert.deepEqual(logs, []);
 
 		await toggle?.click();
 		assert.htmlEqual(
@@ -35,7 +30,7 @@ export default test({
 				<button>increase count</button>
 			`
 		);
-		assert.deepEqual(component.log, [1]);
+		assert.deepEqual(logs, [1]);
 
 		await increment?.click();
 		assert.htmlEqual(
@@ -46,7 +41,7 @@ export default test({
 				<button>increase count</button>
 			`
 		);
-		assert.deepEqual(component.log, [1]);
+		assert.deepEqual(logs, [1]);
 
 		await toggle?.click();
 		assert.htmlEqual(
@@ -57,6 +52,6 @@ export default test({
 				<button>increase count</button>
 			`
 		);
-		assert.deepEqual(component.log, [1]);
+		assert.deepEqual(logs, [1]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/inner.svelte b/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/inner.svelte
index bbe3a61043..3980b77408 100644
--- a/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/inner.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/inner.svelte
@@ -1,6 +1,6 @@
 <script>
-    let { count, log } = $props();
-    log.push(count);
+    let { count } = $props();
+    console.log(count);
 </script>
 
 <p>component: {count}</p>
diff --git a/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/main.svelte b/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/main.svelte
index 682fca22dc..90e04b45a5 100644
--- a/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/snippet-reactive-args/main.svelte
@@ -1,8 +1,6 @@
 <script>
 	import Inner from "./inner.svelte";
 
-	let { log } = $props();
-
 	let count = $state(0);
 	let show_foo = $state(true);
 	let snippet = $derived(show_foo ? foo : bar);
@@ -16,7 +14,7 @@
 	<Inner {...props}></Inner>
 {/snippet}
 
-{@render snippet({ count, log })}
+{@render snippet({ count })}
 
 <button onclick={() => show_foo = !show_foo}>toggle</button>
 <button onclick={() => count++}>increase count</button>
diff --git a/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/_config.js b/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/_config.js
index 13ada44925..5672e0806d 100644
--- a/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/_config.js
@@ -1,22 +1,17 @@
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
 	html: `<button>increment</button>`,
 
-	before_test() {
-		log.length = 0;
-	},
-
-	async test({ assert, target }) {
+	async test({ assert, target, logs }) {
 		const btn = target.querySelector('button');
 
-		assert.deepEqual(log, [1]);
+		assert.deepEqual(logs, [1]);
 
 		await btn?.click();
-		assert.deepEqual(log, [1, 2]);
+		assert.deepEqual(logs, [1, 2]);
 
 		await btn?.click();
-		assert.deepEqual(log, [1, 2, 3]);
+		assert.deepEqual(logs, [1, 2, 3]);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/log.js b/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/main.svelte b/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/main.svelte
index b6f3cd9c5c..cd3564d40d 100644
--- a/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/store-subscribe-effect-init/main.svelte
@@ -1,13 +1,12 @@
 <script>
 	import { writable } from 'svelte/store';
-	import { log } from './log';
 
 	const count = writable(0);
 	let ran = 0;
 
 	$effect(() => {
 		$count;
-		log.push(++ran);
+		console.log(++ran);
 	});
 </script>
 
diff --git a/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/_config.js b/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/_config.js
index d10b5e0790..064eca9aa3 100644
--- a/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/_config.js
@@ -1,13 +1,10 @@
 import { flushSync } from 'svelte';
 import { test } from '../../test';
-import { log } from './log.js';
 
 export default test({
-	before_test() {
-		log.length = 0;
-	},
+	async test({ assert, target, logs }) {
+		assert.deepEqual(logs, ['x', 'y']);
 
-	async test({ assert, target }) {
 		const [b1, b2] = target.querySelectorAll('button');
 
 		flushSync(() => {
@@ -18,6 +15,6 @@ export default test({
 			b2.click();
 		});
 
-		assert.deepEqual(log, ['x', 'y', 'x', 'y']);
+		assert.deepEqual(logs, ['x', 'y', 'x', 'y']);
 	}
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/log.js b/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/log.js
deleted file mode 100644
index d3df521f4d..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/log.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/** @type {any[]} */
-export const log = [];
diff --git a/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/main.svelte b/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/main.svelte
index 83ed148e44..a44130d944 100644
--- a/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/text-multiple-call-expression/main.svelte
@@ -1,16 +1,14 @@
 <script>
-	import { log } from './log.js';
-
 	let x = $state(0);
 	let y = $state(0);
 
 	function getX() {
-		log.push('x')
+		console.log('x')
 		return x;
 	}
 
 	function getY() {
-		log.push('y')
+		console.log('y')
 		return y;
 	}
 </script>

From dcfa5036173316a48a67c4e90d2688c0aa60dbbb Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 08:11:47 -0400
Subject: [PATCH 07/18] fix: use type arguments when extending Map/Set (#10820)

* use type arguments when extending Map/Set

* changeset
---
 .changeset/silent-hats-stare.md       |  5 +++++
 packages/svelte/src/reactivity/map.js |  1 +
 packages/svelte/src/reactivity/set.js |  1 +
 packages/svelte/types/index.d.ts      | 24 ++----------------------
 4 files changed, 9 insertions(+), 22 deletions(-)
 create mode 100644 .changeset/silent-hats-stare.md

diff --git a/.changeset/silent-hats-stare.md b/.changeset/silent-hats-stare.md
new file mode 100644
index 0000000000..3294f491ce
--- /dev/null
+++ b/.changeset/silent-hats-stare.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: add type arguments to Map and Set
diff --git a/packages/svelte/src/reactivity/map.js b/packages/svelte/src/reactivity/map.js
index b2b3ab605b..59fcfc1cf0 100644
--- a/packages/svelte/src/reactivity/map.js
+++ b/packages/svelte/src/reactivity/map.js
@@ -7,6 +7,7 @@ import { map } from './utils.js';
 /**
  * @template K
  * @template V
+ * @extends {Map<K, V>}
  */
 export class ReactiveMap extends Map {
 	/** @type {Map<K, import('#client').Source<V>>} */
diff --git a/packages/svelte/src/reactivity/set.js b/packages/svelte/src/reactivity/set.js
index 1855090cdf..7466885366 100644
--- a/packages/svelte/src/reactivity/set.js
+++ b/packages/svelte/src/reactivity/set.js
@@ -10,6 +10,7 @@ var inited = false;
 
 /**
  * @template T
+ * @extends {Set<T>}
  */
 export class ReactiveSet extends Set {
 	/** @type {Map<T, import('#client').Source<boolean>>} */
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 401b569a61..d70e59d5eb 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -1985,38 +1985,18 @@ declare module 'svelte/reactivity' {
 		constructor(...values: any[]);
 		#private;
 	}
-	class ReactiveSet<T> extends Set<any> {
+	class ReactiveSet<T> extends Set<T> {
 		
 		constructor(value?: Iterable<T> | null | undefined);
 		
-		has(value: T): boolean;
-		
 		add(value: T): this;
-		
-		delete(value: T): boolean;
-		keys(): IterableIterator<T>;
-		values(): IterableIterator<T>;
-		entries(): IterableIterator<[T, T]>;
-		[Symbol.iterator](): IterableIterator<T>;
 		#private;
 	}
-	class ReactiveMap<K, V> extends Map<any, any> {
+	class ReactiveMap<K, V> extends Map<K, V> {
 		
 		constructor(value?: Iterable<readonly [K, V]> | null | undefined);
 		
-		has(key: K): boolean;
-		
-		forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, this_arg?: any): void;
-		
-		get(key: K): V | undefined;
-		
 		set(key: K, value: V): this;
-		
-		delete(key: K): boolean;
-		keys(): IterableIterator<K>;
-		values(): IterableIterator<V>;
-		entries(): IterableIterator<[K, V]>;
-		[Symbol.iterator](): IterableIterator<[K, V]>;
 		#private;
 	}
 	class ReactiveURL extends URL {

From 0bb49b12d2a3eebaf1ab850295d8ddaa802d9f10 Mon Sep 17 00:00:00 2001
From: Yuichiro Yamashita <xydybaseball@gmail.com>
Date: Mon, 22 Apr 2024 21:22:17 +0900
Subject: [PATCH 08/18] fix: resolve type definition error in `svelte/compiler`
 (#11283)

* fix generated type

* add changeset
---
 .changeset/lucky-colts-remember.md    | 5 +++++
 packages/svelte/src/compiler/index.js | 8 +++-----
 packages/svelte/types/index.d.ts      | 4 +---
 3 files changed, 9 insertions(+), 8 deletions(-)
 create mode 100644 .changeset/lucky-colts-remember.md

diff --git a/.changeset/lucky-colts-remember.md b/.changeset/lucky-colts-remember.md
new file mode 100644
index 0000000000..0708829e01
--- /dev/null
+++ b/.changeset/lucky-colts-remember.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: resolve type definition error in `svelte/compiler`
diff --git a/packages/svelte/src/compiler/index.js b/packages/svelte/src/compiler/index.js
index a35f47adbc..eee35bf2a8 100644
--- a/packages/svelte/src/compiler/index.js
+++ b/packages/svelte/src/compiler/index.js
@@ -1,5 +1,5 @@
 import { getLocator } from 'locate-character';
-import { walk } from 'zimmerframe';
+import { walk as zimmerframe_walk } from 'zimmerframe';
 import { CompileError } from './errors.js';
 import { convert } from './legacy.js';
 import { parse as parse_acorn } from './phases/1-parse/acorn.js';
@@ -133,7 +133,7 @@ export function parse(source, options = {}) {
 function to_public_ast(source, ast, modern) {
 	if (modern) {
 		// remove things that we don't want to treat as public API
-		return walk(ast, null, {
+		return zimmerframe_walk(ast, null, {
 			_(node, { next }) {
 				// @ts-ignore
 				delete node.parent;
@@ -151,14 +151,12 @@ function to_public_ast(source, ast, modern) {
  * @deprecated Replace this with `import { walk } from 'estree-walker'`
  * @returns {never}
  */
-function _walk() {
+export function walk() {
 	throw new Error(
 		`'svelte/compiler' no longer exports a \`walk\` utility — please import it directly from 'estree-walker' instead`
 	);
 }
 
-export { _walk as walk };
-
 export { CompileError } from './errors.js';
 
 export { VERSION } from '../version.js';
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index d70e59d5eb..633a910991 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -507,7 +507,7 @@ declare module 'svelte/compiler' {
 	/**
 	 * @deprecated Replace this with `import { walk } from 'estree-walker'`
 	 * */
-	function walk(): never;
+	export function walk(): never;
 	/** The return value of `compile` from `svelte/compiler` */
 	interface CompileResult {
 		/** The compiled JavaScript */
@@ -1763,8 +1763,6 @@ declare module 'svelte/compiler' {
 		style?: Preprocessor;
 		script?: Preprocessor;
 	}
-
-	export { walk };
 }
 
 declare module 'svelte/easing' {

From 05ac8f4322a124fb4d8d064297f8aa47ca47b9a9 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Mon, 22 Apr 2024 08:30:06 -0400
Subject: [PATCH 09/18] Version Packages (next) (#11260)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
---
 .changeset/pre.json            |  8 ++++++++
 packages/svelte/CHANGELOG.md   | 20 ++++++++++++++++++++
 packages/svelte/package.json   |  2 +-
 packages/svelte/src/version.js |  2 +-
 4 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/.changeset/pre.json b/.changeset/pre.json
index 250b24d1b8..6a3cec722e 100644
--- a/.changeset/pre.json
+++ b/.changeset/pre.json
@@ -106,6 +106,7 @@
     "few-clouds-shop",
     "few-mugs-fail",
     "few-teachers-know",
+    "fifty-masks-give",
     "fifty-rice-wait",
     "fifty-steaks-float",
     "five-tigers-search",
@@ -197,6 +198,7 @@
     "light-badgers-glow",
     "light-days-clean",
     "light-humans-hang",
+    "light-penguins-invent",
     "light-pens-watch",
     "little-pans-jog",
     "long-buckets-lay",
@@ -211,6 +213,7 @@
     "lovely-houses-own",
     "lovely-items-turn",
     "lovely-rules-eat",
+    "lucky-colts-remember",
     "lucky-schools-hang",
     "lucky-toes-begin",
     "many-rockets-give",
@@ -303,6 +306,7 @@
     "selfish-socks-smile",
     "selfish-spies-help",
     "selfish-tools-hide",
+    "serious-crabs-punch",
     "serious-gorillas-eat",
     "serious-kids-deliver",
     "serious-needles-joke",
@@ -320,12 +324,14 @@
     "sharp-kids-happen",
     "sharp-tomatoes-learn",
     "shiny-baboons-play",
+    "shiny-mayflies-clean",
     "shiny-rats-heal",
     "shiny-shrimps-march",
     "short-buses-camp",
     "short-countries-rush",
     "shy-fishes-drive",
     "silent-apes-report",
+    "silent-hats-stare",
     "silly-laws-happen",
     "silly-lies-film",
     "silly-ways-wash",
@@ -341,6 +347,7 @@
     "slow-kids-sparkle",
     "slow-plums-chew",
     "slow-wombats-reply",
+    "small-apples-eat",
     "small-papayas-laugh",
     "small-sheep-type",
     "small-spiders-fail",
@@ -404,6 +411,7 @@
     "thick-cycles-rule",
     "thick-pans-tell",
     "thick-shirts-deliver",
+    "thick-swans-type",
     "thin-foxes-lick",
     "thirty-flowers-sit",
     "thirty-ghosts-fix",
diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index 45415364f3..a5a654eedb 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,25 @@
 # svelte
 
+## 5.0.0-next.111
+
+### Patch Changes
+
+- fix: run render functions for dynamic void elements ([#11258](https://github.com/sveltejs/svelte/pull/11258))
+
+- fix: allow events to continue propagating following an error ([#11263](https://github.com/sveltejs/svelte/pull/11263))
+
+- fix: resolve type definition error in `svelte/compiler` ([#11283](https://github.com/sveltejs/svelte/pull/11283))
+
+- feat: include `script` and `svelte:options` attributes in ast ([#11241](https://github.com/sveltejs/svelte/pull/11241))
+
+- fix: only destroy snippets when they have changed ([#11267](https://github.com/sveltejs/svelte/pull/11267))
+
+- fix: add type arguments to Map and Set ([#10820](https://github.com/sveltejs/svelte/pull/10820))
+
+- feat: implement `:global {...}` CSS blocks ([#11276](https://github.com/sveltejs/svelte/pull/11276))
+
+- feat: add read-only `bind:focused` ([#11271](https://github.com/sveltejs/svelte/pull/11271))
+
 ## 5.0.0-next.110
 
 ### Patch Changes
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 43d86f4d9d..709d74dd35 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.0.0-next.110",
+  "version": "5.0.0-next.111",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index 0056ca8180..b13963eb4d 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -6,5 +6,5 @@
  * https://svelte.dev/docs/svelte-compiler#svelte-version
  * @type {string}
  */
-export const VERSION = '5.0.0-next.110';
+export const VERSION = '5.0.0-next.111';
 export const PUBLIC_VERSION = '5';

From fe6e4e2b05b8099d27483b7b5f14c1d757c934d3 Mon Sep 17 00:00:00 2001
From: Craig Jennings <1683368+craig-jennings@users.noreply.github.com>
Date: Mon, 22 Apr 2024 13:16:02 -0500
Subject: [PATCH 10/18] fix: avoid hoisting error by using 'let' instead of
 'var' (#11291)

Fixes #11284
---
 .changeset/plenty-starfishes-dress.md               |  5 +++++
 .../src/internal/client/dom/elements/attributes.js  |  7 ++++---
 .../samples/event-attribute-after-spread/_config.js | 13 +++++++++++++
 .../event-attribute-after-spread/main.svelte        |  7 +++++++
 4 files changed, 29 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/plenty-starfishes-dress.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/main.svelte

diff --git a/.changeset/plenty-starfishes-dress.md b/.changeset/plenty-starfishes-dress.md
new file mode 100644
index 0000000000..38b2201e9e
--- /dev/null
+++ b/.changeset/plenty-starfishes-dress.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: avoid hoisting error by using 'let' instead of 'var'
diff --git a/packages/svelte/src/internal/client/dom/elements/attributes.js b/packages/svelte/src/internal/client/dom/elements/attributes.js
index 67e336744f..58519d9baa 100644
--- a/packages/svelte/src/internal/client/dom/elements/attributes.js
+++ b/packages/svelte/src/internal/client/dom/elements/attributes.js
@@ -111,7 +111,8 @@ export function set_attributes(element, prev, next, lowercase_attributes, css_ha
 	var events = [];
 
 	for (key in next) {
-		var value = next[key];
+		// let instead of var because referenced in a closure
+		let value = next[key];
 		if (value === prev?.[key]) continue;
 
 		var prefix = key[0] + key[1]; // this is faster than key.slice(0, 2)
@@ -119,8 +120,8 @@ export function set_attributes(element, prev, next, lowercase_attributes, css_ha
 
 		if (prefix === 'on') {
 			/** @type {{ capture?: true }} */
-			var opts = {};
-			var event_name = key.slice(2);
+			const opts = {};
+			let event_name = key.slice(2);
 			var delegated = DelegatedEvents.includes(event_name);
 
 			if (
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/_config.js b/packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/_config.js
new file mode 100644
index 0000000000..09975947e6
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/_config.js
@@ -0,0 +1,13 @@
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target }) {
+		const input = target.querySelector('input');
+
+		input?.dispatchEvent(new Event('input', { bubbles: true }));
+
+		await Promise.resolve();
+
+		assert.htmlEqual(target.innerHTML, 'true <input class="hello">');
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/main.svelte
new file mode 100644
index 0000000000..c854071f3e
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/event-attribute-after-spread/main.svelte
@@ -0,0 +1,7 @@
+<script lang="ts">
+	const props = {};
+	let changed = $state(false);
+</script>
+
+{changed}
+<input {...props} oninput={() => (changed = true)} class="hello" />

From e3c85897374a76812191464e7eca869e0aec3082 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Mon, 22 Apr 2024 16:46:28 -0400
Subject: [PATCH 11/18] Version Packages (next) (#11292)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
---
 .changeset/pre.json            | 1 +
 packages/svelte/CHANGELOG.md   | 6 ++++++
 packages/svelte/package.json   | 2 +-
 packages/svelte/src/version.js | 2 +-
 4 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/.changeset/pre.json b/.changeset/pre.json
index 6a3cec722e..91b0d77715 100644
--- a/.changeset/pre.json
+++ b/.changeset/pre.json
@@ -262,6 +262,7 @@
     "orange-yaks-protect",
     "pink-bikes-agree",
     "pink-mayflies-tie",
+    "plenty-starfishes-dress",
     "polite-dolphins-care",
     "polite-pumpkins-guess",
     "polite-ravens-study",
diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index a5a654eedb..109238e281 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,11 @@
 # svelte
 
+## 5.0.0-next.112
+
+### Patch Changes
+
+- fix: avoid hoisting error by using 'let' instead of 'var' ([#11291](https://github.com/sveltejs/svelte/pull/11291))
+
 ## 5.0.0-next.111
 
 ### Patch Changes
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 709d74dd35..f8bee6890b 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.0.0-next.111",
+  "version": "5.0.0-next.112",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index b13963eb4d..d17a9f204e 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -6,5 +6,5 @@
  * https://svelte.dev/docs/svelte-compiler#svelte-version
  * @type {string}
  */
-export const VERSION = '5.0.0-next.111';
+export const VERSION = '5.0.0-next.112';
 export const PUBLIC_VERSION = '5';

From 2d378bb76284d19ec843482086cf5d631ba238a7 Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Tue, 23 Apr 2024 15:29:02 +0200
Subject: [PATCH 12/18] breaking: disallow binding to component exports in
 runes mode (#11238)

* breaking: disallow binding to component exports in runes mode

Svelte 4 allowed you to have `export const foo = ..` in component A and then do `<A bind:foo />`. This is confusing because it's not clear whether the binding is for a property or an export, and we have to sanitize rest props from the export bindings.
This PR therefore introduces a breaking change in runes mode: You cannot bind to these exports anymore. Instead use `<A bind:this={a} />` and then do `a.foo` - makes things easier to reason about.

* Update sites/svelte-5-preview/src/routes/docs/content/03-appendix/02-breaking-changes.md

Co-authored-by: Rich Harris <rich.harris@vercel.com>

* tweak messages

* fix tests

* use component.name

* oops

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>
---
 .changeset/beige-seas-share.md                |  5 +++++
 .../3-transform/client/transform-client.js    | 14 ++++++++++--
 .../client/visitors/javascript-runes.js       |  3 ++-
 .../3-transform/server/transform-server.js    | 22 ++-----------------
 .../svelte/src/internal/client/validate.js    | 22 ++++++++++++++-----
 .../samples/export-binding/Counter.svelte     | 12 ----------
 .../samples/export-binding/_config.js         | 15 ++++---------
 .../export-binding/counter/index.svelte       |  8 +++++++
 .../samples/export-binding/main.svelte        |  4 ++--
 .../props-not-bindable-spread/_config.js      |  5 +++--
 .../samples/props-not-bindable/_config.js     |  5 +++--
 .../03-appendix/02-breaking-changes.md        |  4 ++--
 12 files changed, 59 insertions(+), 60 deletions(-)
 create mode 100644 .changeset/beige-seas-share.md
 delete mode 100644 packages/svelte/tests/runtime-runes/samples/export-binding/Counter.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/export-binding/counter/index.svelte

diff --git a/.changeset/beige-seas-share.md b/.changeset/beige-seas-share.md
new file mode 100644
index 0000000000..3758385c55
--- /dev/null
+++ b/.changeset/beige-seas-share.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+breaking: disallow binding to component exports in runes mode
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js b/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js
index f1de213a9b..70f981d3e6 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js
@@ -255,14 +255,24 @@ export function client_component(source, analysis, options) {
 	);
 
 	if (analysis.runes && options.dev) {
-		const bindable = analysis.exports.map(({ name, alias }) => b.literal(alias ?? name));
+		const exports = analysis.exports.map(({ name, alias }) => b.literal(alias ?? name));
+		/** @type {import('estree').Literal[]} */
+		const bindable = [];
 		for (const [name, binding] of properties) {
 			if (binding.kind === 'bindable_prop') {
 				bindable.push(b.literal(binding.prop_alias ?? name));
 			}
 		}
 		instance.body.unshift(
-			b.stmt(b.call('$.validate_prop_bindings', b.id('$$props'), b.array(bindable)))
+			b.stmt(
+				b.call(
+					'$.validate_prop_bindings',
+					b.id('$$props'),
+					b.array(bindable),
+					b.array(exports),
+					b.id(`${analysis.name}`)
+				)
+			)
 		);
 	}
 
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/javascript-runes.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/javascript-runes.js
index 7646ae78b7..5c5b177917 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/javascript-runes.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/javascript-runes.js
@@ -222,7 +222,8 @@ export const javascript_visitors_runes = {
 			if (rune === '$props') {
 				assert.equal(declarator.id.type, 'ObjectPattern');
 
-				const seen = state.analysis.exports.map(({ name, alias }) => alias ?? name);
+				/** @type {string[]} */
+				const seen = [];
 
 				for (const property of declarator.id.properties) {
 					if (property.type === 'Property') {
diff --git a/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js b/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js
index d5402351c7..4f631b8c70 100644
--- a/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js
+++ b/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js
@@ -692,8 +692,7 @@ const javascript_visitors_runes = {
 			}
 
 			if (rune === '$props') {
-				// remove $bindable() from props declaration and handle rest props
-				let uses_rest_props = false;
+				// remove $bindable() from props declaration
 				const id = walk(declarator.id, null, {
 					AssignmentPattern(node) {
 						if (
@@ -705,26 +704,9 @@ const javascript_visitors_runes = {
 								: b.id('undefined');
 							return b.assignment_pattern(node.left, right);
 						}
-					},
-					RestElement(node, { path }) {
-						if (path.at(-1) === declarator.id) {
-							uses_rest_props = true;
-						}
 					}
 				});
-
-				const exports = /** @type {import('../../types').ComponentAnalysis} */ (
-					state.analysis
-				).exports.map(({ name, alias }) => b.literal(alias ?? name));
-
-				declarations.push(
-					b.declarator(
-						id,
-						uses_rest_props && exports.length > 0
-							? b.call('$.rest_props', b.id('$$props'), b.array(exports))
-							: b.id('$$props')
-					)
-				);
+				declarations.push(b.declarator(id, b.id('$$props')));
 				continue;
 			}
 
diff --git a/packages/svelte/src/internal/client/validate.js b/packages/svelte/src/internal/client/validate.js
index add59ebe82..b2dfee7ab1 100644
--- a/packages/svelte/src/internal/client/validate.js
+++ b/packages/svelte/src/internal/client/validate.js
@@ -85,16 +85,26 @@ export function loop_guard(timeout) {
 /**
  * @param {Record<string, any>} $$props
  * @param {string[]} bindable
+ * @param {string[]} exports
+ * @param {Function & { filename: string }} component
  */
-export function validate_prop_bindings($$props, bindable) {
+export function validate_prop_bindings($$props, bindable, exports, component) {
 	for (const key in $$props) {
-		if (!bindable.includes(key)) {
-			var setter = get_descriptor($$props, key)?.set;
+		var setter = get_descriptor($$props, key)?.set;
+		var name = component.name;
 
-			if (setter) {
+		if (setter) {
+			if (exports.includes(key)) {
 				throw new Error(
-					`Cannot use bind:${key} on this component because the property was not declared as bindable. ` +
-						`To mark a property as bindable, use the $bindable() rune like this: \`let { ${key} = $bindable() } = $props()\``
+					`Component ${component.filename} has an export named ${key} that a consumer component is trying to access using bind:${key}, which is disallowed. ` +
+						`Instead, use bind:this (e.g. <${name} bind:this={component} />) ` +
+						`and then access the property on the bound component instance (e.g. component.${key}).`
+				);
+			}
+			if (!bindable.includes(key)) {
+				throw new Error(
+					`A component is binding to property ${key} of ${name}.svelte (i.e. <${name} bind:${key} />). This is disallowed because the property was not declared as bindable inside ${component.filename}. ` +
+						`To mark a property as bindable, use the $bindable() rune in ${name}.svelte like this: \`let { ${key} = $bindable() } = $props()\``
 				);
 			}
 		}
diff --git a/packages/svelte/tests/runtime-runes/samples/export-binding/Counter.svelte b/packages/svelte/tests/runtime-runes/samples/export-binding/Counter.svelte
deleted file mode 100644
index 94c822f31f..0000000000
--- a/packages/svelte/tests/runtime-runes/samples/export-binding/Counter.svelte
+++ /dev/null
@@ -1,12 +0,0 @@
-<script>
-	let { ...rest } = $props();
-	let count = $state(0);
-	export function increment() {
-		count++;
-	}
-</script>
-
-<!-- test that the binding isn't inside rest -->
-{Object.keys(rest).length}
-
-{count}
diff --git a/packages/svelte/tests/runtime-runes/samples/export-binding/_config.js b/packages/svelte/tests/runtime-runes/samples/export-binding/_config.js
index aa41757bd1..0f64998059 100644
--- a/packages/svelte/tests/runtime-runes/samples/export-binding/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/export-binding/_config.js
@@ -2,16 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	compileOptions: {
-		dev: true // to ensure we don't throw a false-positive "cannot bind to this" error
+		dev: true // to ensure we we catch the error
 	},
-	html: `0 0 <button>increment</button>`,
-
-	async test({ assert, target }) {
-		const btn = target.querySelector('button');
-
-		btn?.click();
-		await Promise.resolve();
-
-		assert.htmlEqual(target.innerHTML, `0 1 <button>increment</button>`);
-	}
+	error:
+		'Component .../export-binding/counter/index.svelte has an export named increment that a consumer component is trying to access using bind:increment, which is disallowed. ' +
+		'Instead, use bind:this (e.g. <Counter bind:this={component} />) and then access the property on the bound component instance (e.g. component.increment).'
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/export-binding/counter/index.svelte b/packages/svelte/tests/runtime-runes/samples/export-binding/counter/index.svelte
new file mode 100644
index 0000000000..14e0de961b
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/export-binding/counter/index.svelte
@@ -0,0 +1,8 @@
+<script>
+	let count = $state(0);
+	export function increment() {
+		count++;
+	}
+</script>
+
+{count}
diff --git a/packages/svelte/tests/runtime-runes/samples/export-binding/main.svelte b/packages/svelte/tests/runtime-runes/samples/export-binding/main.svelte
index 89f0aff9a0..4ad1684701 100644
--- a/packages/svelte/tests/runtime-runes/samples/export-binding/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/export-binding/main.svelte
@@ -1,7 +1,7 @@
 <script>
-    import Counter from './Counter.svelte';
+    import Counter from './counter/index.svelte';
     let increment;
 </script>
 
 <Counter bind:increment={increment} />
-<button onclick={increment}>increment</button>
\ No newline at end of file
+<button onclick={increment}>increment</button>
diff --git a/packages/svelte/tests/runtime-runes/samples/props-not-bindable-spread/_config.js b/packages/svelte/tests/runtime-runes/samples/props-not-bindable-spread/_config.js
index 4c3fdf5bd9..fc6b46d488 100644
--- a/packages/svelte/tests/runtime-runes/samples/props-not-bindable-spread/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/props-not-bindable-spread/_config.js
@@ -5,7 +5,8 @@ export default test({
 		dev: true
 	},
 	error:
-		'Cannot use bind:count on this component because the property was not declared as bindable. ' +
-		'To mark a property as bindable, use the $bindable() rune like this: `let { count = $bindable() } = $props()`',
+		'A component is binding to property count of Counter.svelte (i.e. <Counter bind:count />). This is disallowed because the property was ' +
+		'not declared as bindable inside .../samples/props-not-bindable-spread/Counter.svelte. To mark a property as bindable, use the $bindable() rune ' +
+		'in Counter.svelte like this: `let { count = $bindable() } = $props()`',
 	html: `0`
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/props-not-bindable/_config.js b/packages/svelte/tests/runtime-runes/samples/props-not-bindable/_config.js
index 4c3fdf5bd9..b3dcc7f23e 100644
--- a/packages/svelte/tests/runtime-runes/samples/props-not-bindable/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/props-not-bindable/_config.js
@@ -5,7 +5,8 @@ export default test({
 		dev: true
 	},
 	error:
-		'Cannot use bind:count on this component because the property was not declared as bindable. ' +
-		'To mark a property as bindable, use the $bindable() rune like this: `let { count = $bindable() } = $props()`',
+		'A component is binding to property count of Counter.svelte (i.e. <Counter bind:count />). This is disallowed because the property was ' +
+		'not declared as bindable inside .../samples/props-not-bindable/Counter.svelte. To mark a property as bindable, use the $bindable() rune ' +
+		'in Counter.svelte like this: `let { count = $bindable() } = $props()`',
 	html: `0`
 });
diff --git a/sites/svelte-5-preview/src/routes/docs/content/03-appendix/02-breaking-changes.md b/sites/svelte-5-preview/src/routes/docs/content/03-appendix/02-breaking-changes.md
index 25547f72ab..43a5c7134c 100644
--- a/sites/svelte-5-preview/src/routes/docs/content/03-appendix/02-breaking-changes.md
+++ b/sites/svelte-5-preview/src/routes/docs/content/03-appendix/02-breaking-changes.md
@@ -121,9 +121,9 @@ Content inside component tags becomes a [snippet prop](/docs/snippets) called `c
 
 Some breaking changes only apply once your component is in runes mode.
 
-### Bindings to component exports don't show up in rest props
+### Bindings to component exports are not allowed
 
-In runes mode, bindings to component exports don't show up in rest props. For example, `rest` in `let { foo, bar, ...rest } = $props();` would not contain `baz` if `baz` was defined as `export const baz = ...;` inside the component. In Svelte 4 syntax, the equivalent to `rest` would be `$$restProps`, which contains these component exports.
+Exports from runes mode components cannot be bound to directly. For example, having `export const foo = ...` in component `A` and then doing `<A bind:foo />` causes an error. Use `bind:this` instead — `<A bind:this={a} />` — and access the export as `a.foo`. This change makes things easier to reason about, as it enforces a clear separation between props and exports.
 
 ### Bindings need to be explicitly defined using `$bindable()`
 

From 3866887f3787a61c044448a7557a7f89489b293b Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Tue, 23 Apr 2024 09:56:58 -0400
Subject: [PATCH 13/18] Version Packages (next) (#11296)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
---
 .changeset/pre.json            | 1 +
 packages/svelte/CHANGELOG.md   | 6 ++++++
 packages/svelte/package.json   | 2 +-
 packages/svelte/src/version.js | 2 +-
 4 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/.changeset/pre.json b/.changeset/pre.json
index 91b0d77715..300038c872 100644
--- a/.changeset/pre.json
+++ b/.changeset/pre.json
@@ -19,6 +19,7 @@
     "beige-flies-wash",
     "beige-mirrors-listen",
     "beige-rabbits-shave",
+    "beige-seas-share",
     "big-cars-serve",
     "big-eggs-flash",
     "big-eyes-carry",
diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index 109238e281..0e57787e43 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,11 @@
 # svelte
 
+## 5.0.0-next.113
+
+### Patch Changes
+
+- breaking: disallow binding to component exports in runes mode ([#11238](https://github.com/sveltejs/svelte/pull/11238))
+
 ## 5.0.0-next.112
 
 ### Patch Changes
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index f8bee6890b..11b8c7a46c 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.0.0-next.112",
+  "version": "5.0.0-next.113",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index d17a9f204e..81de554c27 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -6,5 +6,5 @@
  * https://svelte.dev/docs/svelte-compiler#svelte-version
  * @type {string}
  */
-export const VERSION = '5.0.0-next.112';
+export const VERSION = '5.0.0-next.113';
 export const PUBLIC_VERSION = '5';

From 73490bbb8e3c0640ac72151d7e9aa8b5bf6604d6 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Tue, 23 Apr 2024 10:39:37 -0400
Subject: [PATCH 14/18] chore: markdown errors (#11294)

* rename errors.js to errors-tmp.js

* start porting errors

* generate markdown files for more errors

* convert parse errors

* convert css errors

* convert special_element errors

* convert runes errors

* convert element errors

* more

* more

* more

* more

* more

* more

* fix some tests

* fix some tests

* more tests

* remove unused error

* prettierignore

* weird

* ugh

* lint
---
 .prettierignore                               |    2 +
 eslint.config.js                              |    5 +-
 .../messages/compile-errors/attributes.md     |   59 +
 .../messages/compile-errors/bindings.md       |   35 +
 .../compile-errors/compiler_options.md        |    7 +
 .../messages/compile-errors/components.md     |    3 +
 .../messages/compile-errors/const_tag.md      |    3 +
 .../svelte/messages/compile-errors/css.md     |   51 +
 .../messages/compile-errors/elements.md       |   27 +
 .../compile-errors/legacy_reactivity.md       |    3 +
 .../svelte/messages/compile-errors/parse.md   |  147 ++
 .../svelte/messages/compile-errors/runes.md   |   95 +
 .../svelte/messages/compile-errors/slots.md   |   31 +
 .../compile-errors/special_elements.md        |   99 +
 .../messages/compile-errors/variables.md      |   19 +
 .../svelte/scripts/process-messages/index.js  |  213 ++
 .../templates/compile-errors.js               |   74 +
 packages/svelte/src/compiler/errors.js        | 1849 ++++++++++++-----
 .../src/compiler/phases/1-parse/index.js      |   22 +-
 .../compiler/phases/1-parse/read/context.js   |   10 +-
 .../phases/1-parse/read/expression.js         |    4 +-
 .../compiler/phases/1-parse/read/options.js   |   91 +-
 .../compiler/phases/1-parse/read/script.js    |    8 +-
 .../src/compiler/phases/1-parse/read/style.js |   22 +-
 .../compiler/phases/1-parse/state/element.js  |   74 +-
 .../src/compiler/phases/1-parse/state/tag.js  |   30 +-
 .../phases/2-analyze/css/css-analyze.js       |   27 +-
 .../src/compiler/phases/2-analyze/index.js    |   22 +-
 .../compiler/phases/2-analyze/validation.js   |  267 +--
 .../3-transform/client/transform-client.js    |   27 +-
 .../phases/3-transform/client/utils.js        |    3 +-
 .../3-transform/client/visitors/template.js   |    7 +-
 .../3-transform/server/transform-server.js    |   18 +-
 packages/svelte/src/compiler/phases/scope.js  |   12 +-
 packages/svelte/src/compiler/utils/assert.js  |    6 +-
 .../svelte/src/compiler/validate-options.js   |    9 +-
 .../samples/attribute-empty/_config.js        |    2 +-
 .../_config.js                                |    2 +-
 .../attribute-sequence-expression/_config.js  |    2 +-
 .../attribute-unique-binding/_config.js       |    2 +-
 .../attribute-unique-shorthand/_config.js     |    2 +-
 .../samples/attribute-unique/_config.js       |    2 +-
 .../samples/catch-before-closing/_config.js   |    2 +-
 .../samples/catch-without-await/_config.js    |    2 +-
 .../class-state-field-static/_config.js       |    5 +-
 .../samples/comment-unclosed/_config.js       |    4 +-
 .../_config.js                                |    2 +-
 .../_config.js                                |    2 +-
 .../_config.js                                |    2 +-
 .../_config.js                                |    2 +-
 .../_config.js                                |    2 +-
 .../component-slot-duplicate-error/_config.js |    2 +-
 .../component-slot-nested-error-2/_config.js  |    2 +-
 .../component-slot-nested-error-3/_config.js  |    2 +-
 .../component-slot-nested-error/_config.js    |    2 +-
 .../css-global-block-combinator/_config.js    |    2 +-
 .../css-global-block-declaration/_config.js   |    2 +-
 .../css-global-block-modifier/_config.js      |    2 +-
 .../css-global-block-multiple/_config.js      |    2 +-
 .../compiler-errors/samples/css/_config.js    |    2 +-
 .../dollar-binding-declaration/_config.js     |    2 +-
 .../dollar-binding-global-js/_config.js       |    4 +-
 .../samples/dollar-binding-global/_config.js  |    4 +-
 .../samples/dollar-binding-import/_config.js  |    2 +-
 .../_config.js                                |    4 +-
 .../samples/else-before-closing-2/_config.js  |    2 +-
 .../samples/else-before-closing-3/_config.js  |    2 +-
 .../samples/else-before-closing/_config.js    |    2 +-
 .../else-if-before-closing-2/_config.js       |    2 +-
 .../samples/else-if-before-closing/_config.js |    2 +-
 .../samples/else-if-without-if/_config.js     |    2 +-
 .../empty-attribute-shorthand/_config.js      |    2 +-
 .../empty-classname-binding/_config.js        |    2 +-
 .../samples/empty-directive-name/_config.js   |    2 +-
 .../samples/export-derived-state/_config.js   |    2 +-
 .../samples/export-state-module/_config.js    |    2 +-
 .../samples/export-state/_config.js           |    2 +-
 .../samples/illegal-expression/_config.js     |    2 +-
 .../invalid-snippet-binding/_config.js        |    2 +-
 .../invalid-snippet-mutation/_config.js       |    2 +-
 .../legacy-no-const-assignment/_config.js     |    4 +-
 .../samples/legacy-no-const-update/_config.js |    4 +-
 .../samples/multiple-styles/_config.js        |    4 +-
 .../samples/options-children/_config.js       |    2 +-
 .../raw-mustaches-whitespace/_config.js       |    2 +-
 .../render-tag-invalid-call/_config.js        |    2 +-
 .../runes-before-after-update/_config.js      |    2 +-
 .../samples/runes-duplicate-props/_config.js  |    4 +-
 .../samples/runes-export-let/_config.js       |    2 +-
 .../runes-export-named-state/_config.js       |    2 +-
 .../runes-invalid-each-binding/_config.js     |    4 +-
 .../runes-invalid-each-mutation/_config.js    |    4 +-
 .../runes-no-const-assignment/_config.js      |    4 +-
 .../samples/runes-no-const-update/_config.js  |    4 +-
 .../runes-no-derived-assignment/_config.js    |    4 +-
 .../runes-no-derived-binding/_config.js       |    4 +-
 .../_config.js                                |    4 +-
 .../_config.js                                |    4 +-
 .../runes-no-derived-update/_config.js        |    4 +-
 .../samples/runes-no-rune-each/_config.js     |    4 +-
 .../runes-prop-export-conflict/_config.js     |    2 +-
 .../runes-wrong-bindable-args/_config.js      |    4 +-
 .../runes-wrong-bindable-placement/_config.js |    4 +-
 .../runes-wrong-derived-args/_config.js       |    4 +-
 .../runes-wrong-derived-placement/_config.js  |    5 +-
 .../runes-wrong-effect-args/_config.js        |    4 +-
 .../runes-wrong-effect-placement/_config.js   |    4 +-
 .../runes-wrong-host-placement/_config.js     |    4 +-
 .../samples/runes-wrong-props-args/_config.js |    4 +-
 .../runes-wrong-props-placement/_config.js    |    4 +-
 .../samples/runes-wrong-state-args/_config.js |    4 +-
 .../runes-wrong-state-placement/_config.js    |    4 +-
 .../_config.js                                |    4 +-
 .../samples/script-unclosed-eof/_config.js    |    2 +-
 .../samples/script-unclosed/_config.js        |    4 +-
 .../samples/self-reference/_config.js         |    4 +-
 .../_config.js                                |    4 +-
 .../snippet-children-conflict/_config.js      |    2 +-
 .../store-autosub-context-module/_config.js   |    4 +-
 .../samples/store-contextual/_config.js       |    2 +-
 .../store-global-disallowed/_config.js        |    4 +-
 .../_config.js                                |    2 +-
 .../samples/store-shadow-scope-2/_config.js   |    2 +-
 .../samples/store-shadow-scope-3/_config.js   |    2 +-
 .../samples/store-shadow-scope/_config.js     |    2 +-
 .../_config.js                                |    2 +-
 .../samples/style-unclosed-eof/_config.js     |    2 +-
 .../samples/style-unclosed/_config.js         |    2 +-
 .../samples/svelte-selfdestructive/_config.js |    4 +-
 .../samples/then-before-closing/_config.js    |    2 +-
 .../samples/then-without-await/_config.js     |    2 +-
 .../_config.js                                |    2 +-
 .../unexpected-end-of-input-b/_config.js      |    2 +-
 .../unexpected-end-of-input-c/_config.js      |    2 +-
 .../unexpected-end-of-input-d/_config.js      |    2 +-
 .../unexpected-end-of-input/_config.js        |    4 +-
 .../_config.js                                |    2 +-
 .../_config.js                                |    2 +-
 .../samples/unmatched-closing-tag/_config.js  |    2 +-
 .../samples/void-closing/_config.js           |    2 +-
 .../samples/window-children/_config.js        |    2 +-
 .../samples/window-duplicate/_config.js       |    2 +-
 .../samples/window-inside-block/_config.js    |    2 +-
 .../samples/window-inside-element/_config.js  |    2 +-
 .../samples/action-on-component/errors.json   |    2 +-
 .../samples/animation-duplicate/errors.json   |    2 +-
 .../samples/animation-not-in-each/errors.json |    4 +-
 .../animation-not-in-keyed-each/errors.json   |    4 +-
 .../animation-on-component/errors.json        |    2 +-
 .../samples/animation-siblings/errors.json    |    4 +-
 .../samples/assignment-to-const-2/errors.json |    4 +-
 .../samples/assignment-to-const-3/errors.json |    4 +-
 .../samples/assignment-to-const-4/errors.json |    4 +-
 .../samples/assignment-to-const-5/errors.json |    4 +-
 .../samples/assignment-to-const-7/errors.json |    4 +-
 .../samples/assignment-to-const/errors.json   |    4 +-
 .../attribute-expected-equals/errors.json     |    2 +-
 .../attribute-invalid-name-2/errors.json      |    2 +-
 .../attribute-invalid-name-3/errors.json      |    2 +-
 .../attribute-invalid-name-4/errors.json      |    2 +-
 .../attribute-invalid-name-5/errors.json      |    2 +-
 .../attribute-invalid-name/errors.json        |    2 +-
 .../samples/binding-await-catch/errors.json   |   14 +-
 .../samples/binding-await-then-2/errors.json  |   14 +-
 .../samples/binding-await-then/errors.json    |   14 +-
 .../samples/binding-const/errors.json         |    4 +-
 .../binding-dimensions-svg/errors.json        |    4 +-
 .../samples/binding-input-checked/errors.json |    4 +-
 .../binding-input-type-boolean/errors.json    |    2 +-
 .../errors.json                               |    4 +-
 .../binding-invalid-on-element-2/errors.json  |    4 +-
 .../binding-invalid-on-element/errors.json    |    4 +-
 .../binding-invalid-value-global/errors.json  |    2 +-
 .../samples/binding-invalid-value/errors.json |    2 +-
 .../samples/binding-invalid/errors.json       |    4 +-
 .../validator/samples/binding-let/errors.json |    4 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |   12 +-
 .../errors.json                               |    4 +-
 .../errors.json                               |    2 +-
 .../component-slot-dynamic/errors.json        |    2 +-
 .../errors.json                               |   12 +-
 .../component-slotted-each-block/errors.json  |    2 +-
 .../component-slotted-if-block/errors.json    |    2 +-
 .../samples/const-tag-conflict-1/errors.json  |   14 +-
 .../samples/const-tag-conflict-2/errors.json  |   14 +-
 .../samples/const-tag-placement-1/errors.json |   12 +-
 .../samples/const-tag-placement-2/errors.json |   12 +-
 .../samples/const-tag-readonly-1/errors.json  |   14 +-
 .../samples/const-tag-readonly-2/errors.json  |   14 +-
 .../contenteditable-dynamic/errors.json       |    2 +-
 .../contenteditable-missing/errors.json       |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../css-invalid-global-placement/errors.json  |    2 +-
 .../css-invalid-global-selector-2/errors.json |    2 +-
 .../css-invalid-global-selector-3/errors.json |    2 +-
 .../css-invalid-global-selector-4/errors.json |    2 +-
 .../css-invalid-global-selector-5/errors.json |    2 +-
 .../css-invalid-global-selector-6/errors.json |    2 +-
 .../errors.json                               |    2 +-
 .../css-invalid-global-selector/errors.json   |    2 +-
 .../errors.json                               |    2 +-
 .../samples/css-mismatched-quotes/errors.json |    2 +-
 .../samples/debug-invalid-args/errors.json    |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../samples/default-export/errors.json        |    2 +-
 .../directive-non-expression/errors.json      |    2 +-
 .../errors.json                               |    4 +-
 .../errors.json                               |    4 +-
 .../dollar-global-in-markup/errors.json       |    4 +-
 .../dollar-global-in-script/errors.json       |    4 +-
 .../dynamic-element-invalid-tag/errors.json   |    2 +-
 .../dynamic-element-missing-tag/errors.json   |    4 +-
 .../samples/dynamic-element-this/errors.json  |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../each-block-invalid-context/errors.json    |    2 +-
 .../samples/event-attribute/errors.json       |    2 +-
 .../errors.json                               |    2 +-
 .../errors.json                               |    2 +-
 .../event-modifiers-invalid/errors.json       |    2 +-
 .../html-block-in-attribute/errors.json       |   12 +-
 .../html-block-in-textarea/errors.json        |   12 +-
 .../illegal-variable-declaration/errors.json  |    4 +-
 .../invalid-empty-css-declaration/errors.json |    2 +-
 .../invalid-node-placement-2/errors.json      |    2 +-
 .../invalid-node-placement/errors.json        |    2 +-
 .../samples/let-directive/errors.json         |   14 +-
 .../logic-block-in-attribute/errors.json      |   12 +-
 .../logic-block-in-textarea/errors.json       |   12 +-
 .../errors.json                               |    4 +-
 .../errors.json                               |    4 +-
 .../samples/namespace-invalid/errors.json     |    4 +-
 .../samples/namespace-non-literal/errors.json |    4 +-
 .../reactive-declaration-cyclical/errors.json |   12 +-
 .../script-invalid-context/errors.json        |    2 +-
 .../slot-attribute-invalid/errors.json        |    2 +-
 .../errors.json                               |    2 +-
 .../svelte-fragment-placement-2/errors.json   |   14 +-
 .../svelte-fragment-placement/errors.json     |   14 +-
 .../svelte-head-attributes/errors.json        |   14 +-
 .../validator/samples/tag-invalid/errors.json |    4 +-
 .../samples/tag-non-string/errors.json        |    2 +-
 .../textarea-value-children/errors.json       |    4 +-
 .../samples/title-no-attributes/errors.json   |    4 +-
 .../samples/title-no-children/errors.json     |    4 +-
 .../errors.json                               |    4 +-
 .../transition-duplicate-in/errors.json       |    4 +-
 .../errors.json                               |    4 +-
 .../transition-duplicate-out/errors.json      |    4 +-
 .../errors.json                               |    4 +-
 .../errors.json                               |    4 +-
 .../errors.json                               |    4 +-
 .../transition-on-component/errors.json       |    2 +-
 .../errors.json                               |    4 +-
 .../window-binding-invalid/errors.json        |    4 +-
 267 files changed, 3027 insertions(+), 1198 deletions(-)
 create mode 100644 packages/svelte/messages/compile-errors/attributes.md
 create mode 100644 packages/svelte/messages/compile-errors/bindings.md
 create mode 100644 packages/svelte/messages/compile-errors/compiler_options.md
 create mode 100644 packages/svelte/messages/compile-errors/components.md
 create mode 100644 packages/svelte/messages/compile-errors/const_tag.md
 create mode 100644 packages/svelte/messages/compile-errors/css.md
 create mode 100644 packages/svelte/messages/compile-errors/elements.md
 create mode 100644 packages/svelte/messages/compile-errors/legacy_reactivity.md
 create mode 100644 packages/svelte/messages/compile-errors/parse.md
 create mode 100644 packages/svelte/messages/compile-errors/runes.md
 create mode 100644 packages/svelte/messages/compile-errors/slots.md
 create mode 100644 packages/svelte/messages/compile-errors/special_elements.md
 create mode 100644 packages/svelte/messages/compile-errors/variables.md
 create mode 100644 packages/svelte/scripts/process-messages/index.js
 create mode 100644 packages/svelte/scripts/process-messages/templates/compile-errors.js

diff --git a/.prettierignore b/.prettierignore
index 48d37dc02f..77bdd29cf3 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -2,6 +2,8 @@ packages/**/dist/*.js
 packages/**/build/*.js
 packages/**/npm/**/*
 packages/**/config/*.js
+packages/svelte/messages/**/*.md
+packages/svelte/src/compiler/errors.js
 packages/svelte/tests/**/*.svelte
 packages/svelte/tests/**/_expected*
 packages/svelte/tests/**/_actual*
diff --git a/eslint.config.js b/eslint.config.js
index 75fcc7fa06..a86f724d34 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -33,13 +33,16 @@ export default [
 		ignores: [
 			'**/*.d.ts',
 			'**/tests',
+			'packages/svelte/scripts/process-messages/templates/*.js',
+			'packages/svelte/src/compiler/errors.js',
 			'packages/svelte/compiler/index.js',
 			// documentation can contain invalid examples
 			'documentation',
 			// contains a fork of the REPL which doesn't adhere to eslint rules
 			'sites/svelte-5-preview/**',
 			// wasn't checked previously, reenable at some point
-			'sites/svelte.dev/**'
+			'sites/svelte.dev/**',
+			'tmp/**'
 		]
 	}
 ];
diff --git a/packages/svelte/messages/compile-errors/attributes.md b/packages/svelte/messages/compile-errors/attributes.md
new file mode 100644
index 0000000000..9501080ee0
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/attributes.md
@@ -0,0 +1,59 @@
+## empty_attribute_shorthand
+
+Attribute shorthand cannot be empty
+
+## duplicate_attribute
+
+Attributes need to be unique
+
+## invalid_event_attribute_value
+
+Event attribute must be a JavaScript expression, not a string
+
+## invalid_attribute_name
+
+'%name%' is not a valid attribute name
+
+## animation_invalid_placement
+
+An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block
+
+## animation_missing_key
+
+An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block. Did you forget to add a key to your each block?
+
+## animation_duplicate
+
+An element can only have one 'animate' directive
+
+## invalid_event_modifier
+
+Valid event modifiers are %list%
+
+## invalid_component_event_modifier
+
+Event modifiers other than 'once' can only be used on DOM elements
+
+## invalid_event_modifier_combination
+
+The '%modifier1%' and '%modifier2%' modifiers cannot be used together
+
+## transition_duplicate
+
+Cannot use multiple `%type%:` directives on a single element
+
+## transition_conflict
+
+Cannot use `%type%:` alongside existing `%existing%:` directive
+
+## invalid_let_directive_placement
+
+`let:` directive at invalid position
+
+## invalid_style_directive_modifier
+
+Invalid 'style:' modifier. Valid modifiers are: 'important'
+
+## invalid_sequence_expression
+
+Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses
diff --git a/packages/svelte/messages/compile-errors/bindings.md b/packages/svelte/messages/compile-errors/bindings.md
new file mode 100644
index 0000000000..5e88c5890a
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/bindings.md
@@ -0,0 +1,35 @@
+## invalid_binding_expression
+
+Can only bind to an Identifier or MemberExpression
+
+## invalid_binding_value
+
+Can only bind to state or props
+
+## bind_invalid_target
+
+`bind:%name%` can only be used with %elements%
+
+## bind_invalid
+
+`bind:%name%` is not a valid binding
+
+## bind_invalid_detailed
+
+`bind:%name%` is not a valid binding. %explanation%
+
+## invalid_type_attribute
+
+'type' attribute must be a static text value if input uses two-way binding
+
+## invalid_multiple_attribute
+
+'multiple' attribute must be static if select uses two-way binding
+
+## missing_contenteditable_attribute
+
+'contenteditable' attribute is required for textContent, innerHTML and innerText two-way bindings
+
+## dynamic_contenteditable_attribute
+
+'contenteditable' attribute cannot be dynamic if element uses two-way binding
diff --git a/packages/svelte/messages/compile-errors/compiler_options.md b/packages/svelte/messages/compile-errors/compiler_options.md
new file mode 100644
index 0000000000..761d74c72a
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/compiler_options.md
@@ -0,0 +1,7 @@
+## invalid_compiler_option
+
+Invalid compiler option: %msg%
+
+## removed_compiler_option
+
+Invalid compiler option: %msg%
\ No newline at end of file
diff --git a/packages/svelte/messages/compile-errors/components.md b/packages/svelte/messages/compile-errors/components.md
new file mode 100644
index 0000000000..88a31a81c6
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/components.md
@@ -0,0 +1,3 @@
+## invalid_component_directive
+
+This type of directive is not valid on components
\ No newline at end of file
diff --git a/packages/svelte/messages/compile-errors/const_tag.md b/packages/svelte/messages/compile-errors/const_tag.md
new file mode 100644
index 0000000000..de8a8ca909
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/const_tag.md
@@ -0,0 +1,3 @@
+## invalid_const_placement
+
+{@const} must be the immediate child of {#snippet}, {#if}, {:else if}, {:else}, {#each}, {:then}, {:catch}, <svelte:fragment> or <Component>
\ No newline at end of file
diff --git a/packages/svelte/messages/compile-errors/css.md b/packages/svelte/messages/compile-errors/css.md
new file mode 100644
index 0000000000..33331cfac6
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/css.md
@@ -0,0 +1,51 @@
+## invalid_css_empty_declaration
+
+Declaration cannot be empty
+
+## invalid_css_global_block_list
+
+A :global {...} block cannot be part of a selector list with more than one item
+
+## invalid_css_global_block_modifier
+
+A :global {...} block cannot modify an existing selector
+
+## invalid_css_global_block_combinator
+
+A :global {...} block cannot follow a %name% combinator
+
+## invalid_css_global_block_declaration
+
+A :global {...} block can only contain rules, not declarations
+
+## invalid_css_global_placement
+
+:global(...) can be at the start or end of a selector sequence, but not in the middle
+
+## invalid_css_global_selector
+
+:global(...) must contain exactly one selector
+
+## invalid_css_global_selector_list
+
+:global(...) must not contain type or universal selectors when used in a compound selector
+
+## invalid_css_type_selector_placement
+
+:global(...) must not be followed with a type selector
+
+## invalid_css_selector
+
+Invalid selector
+
+## invalid_css_identifier
+
+Expected a valid CSS identifier
+
+## invalid_nesting_selector
+
+Nesting selectors can only be used inside a rule
+
+## invalid_css_declaration
+
+Declaration cannot be empty
diff --git a/packages/svelte/messages/compile-errors/elements.md b/packages/svelte/messages/compile-errors/elements.md
new file mode 100644
index 0000000000..466a26a7ac
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/elements.md
@@ -0,0 +1,27 @@
+## invalid_textarea_content
+
+A `<textarea>` can have either a value attribute or (equivalently) child content, but not both
+
+## invalid_void_content
+
+Void elements cannot have children or closing tags
+
+## invalid_element_content
+
+<%name%> cannot have children
+
+## invalid_tag_name
+
+Expected valid tag name
+
+## invalid_node_placement
+
+%thing% is invalid inside <%parent%>
+
+## illegal_title_attribute
+
+`<title>` cannot have attributes nor directives
+
+## invalid_title_content
+
+`<title>` can only contain text and {tags}
diff --git a/packages/svelte/messages/compile-errors/legacy_reactivity.md b/packages/svelte/messages/compile-errors/legacy_reactivity.md
new file mode 100644
index 0000000000..6f4234aa01
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/legacy_reactivity.md
@@ -0,0 +1,3 @@
+## cyclical_reactive_declaration
+
+Cyclical dependency detected: %cycle%
diff --git a/packages/svelte/messages/compile-errors/parse.md b/packages/svelte/messages/compile-errors/parse.md
new file mode 100644
index 0000000000..e09c61e419
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/parse.md
@@ -0,0 +1,147 @@
+## unclosed_element
+
+`<%name%>` was left open
+
+## unclosed_block
+
+Block was left open
+
+## unexpected_block_close
+
+Unexpected block closing tag
+
+## unexpected_eof
+
+Unexpected end of input
+
+## js_parse_error
+
+%message%
+
+## expected_token
+
+Expected token %token%
+
+## unexpected_reserved_word
+
+'%word%' is a reserved word in JavaScript and cannot be used here
+
+## missing_whitespace
+
+Expected whitespace
+
+## expected_pattern
+
+Expected identifier or destructure pattern
+
+## invalid_script_context
+
+If the context attribute is supplied, its value must be "module"
+
+## invalid_elseif
+
+'elseif' should be 'else if'
+
+## invalid_continuing_block_placement
+
+{:...} block is invalid at this position (did you forget to close the preceeding element or block?)
+
+## invalid_block_missing_parent
+
+%child% block must be a child of %parent%
+
+## duplicate_block_part
+
+%name% cannot appear more than once within a block
+
+## expected_block_type
+
+Expected 'if', 'each', 'await', 'key' or 'snippet'
+
+## expected_identifier
+
+Expected an identifier
+
+## invalid_debug
+
+{@debug ...} arguments must be identifiers, not arbitrary expressions
+
+## invalid_const
+
+{@const ...} must be an assignment
+
+## invalid_block_placement
+
+{#%name% ...} block cannot be %location%
+
+## invalid_tag_placement
+
+{@%name% ...} tag cannot be %location%
+
+## missing_attribute_value
+
+Expected attribute value
+
+## unclosed_attribute_value
+
+Expected closing %delimiter% character
+
+## invalid_directive_value
+
+Directive value must be a JavaScript expression enclosed in curly braces
+
+## empty_directive_name
+
+%type% name cannot be empty
+
+## invalid_closing_tag
+
+</%name%> attempted to close an element that was not open
+
+## invalid_closing_tag_after_autoclose
+
+</%name%> attempted to close element that was already automatically closed by <%reason%> (cannot nest <%reason%> inside <%name%>)
+
+## invalid_dollar_binding
+
+The $ name is reserved, and cannot be used for variables and imports
+
+## invalid_dollar_prefix
+
+The $ prefix is reserved, and cannot be used for variables and imports
+
+## invalid_dollar_global
+
+The $ name is reserved. To reference a global variable called $, use globalThis.$
+
+## illegal_subscription
+
+Cannot reference store value inside `<script context="module">`
+
+## duplicate_style_element
+
+A component can have a single top-level `<style>` element
+
+## duplicate_script_element
+
+A component can have a single top-level `<script>` element and/or a single top-level `<script context="module">` element
+
+## invalid_render_expression
+
+{@render ...} tags can only contain call expressions
+
+## invalid_render_arguments
+
+expected at most one argument
+
+## invalid_render_call
+
+Calling a snippet function using apply, bind or call is not allowed
+
+## invalid_render_spread_argument
+
+cannot use spread arguments in {@render ...} tags
+
+## invalid_snippet_rest_parameter
+
+snippets do not support rest parameters; use an array instead
diff --git a/packages/svelte/messages/compile-errors/runes.md b/packages/svelte/messages/compile-errors/runes.md
new file mode 100644
index 0000000000..c8efa4eefb
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/runes.md
@@ -0,0 +1,95 @@
+## invalid_legacy_props
+
+Cannot use `$$props` in runes mode
+
+## invalid_legacy_rest_props
+
+Cannot use `$$restProps` in runes mode
+
+## invalid_legacy_reactive_statement
+
+`$:` is not allowed in runes mode, use `$derived` or `$effect` instead
+
+## invalid_legacy_export
+
+Cannot use `export let` in runes mode — use $props instead
+
+## invalid_rune_usage
+
+Cannot use %rune% rune in non-runes mode
+
+## invalid_state_export
+
+Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties
+
+## invalid_derived_export
+
+Cannot export derived state from a module. To expose the current derived value, export a function returning its value
+
+## invalid_props_id
+
+`$props()` can only be used with an object destructuring pattern
+
+## invalid_props_pattern
+
+`$props()` assignment must not contain nested properties or computed keys
+
+## invalid_props_location
+
+`$props()` can only be used at the top level of components as a variable declaration initializer
+
+## invalid_bindable_location
+
+`$bindable()` can only be used inside a `$props()` declaration
+
+## invalid_state_location
+
+`%rune%(...)` can only be used as a variable declaration initializer or a class field
+
+## invalid_effect_location
+
+`$effect()` can only be used as an expression statement
+
+## invalid_host_location
+
+`$host()` can only be used inside custom element component instances
+
+## invalid_assignment
+
+Cannot assign to %thing%
+
+## invalid_binding
+
+Cannot bind to %thing%
+
+## invalid_rune_args
+
+`%rune%` cannot be called with arguments
+
+## invalid_rune_args_length
+
+`%rune%` must be called with %args%
+
+## invalid_runes_mode_import
+
+%name% cannot be used in runes mode
+
+## duplicate_props_rune
+
+Cannot use `$props()` more than once
+
+## invalid_each_assignment
+
+Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)
+
+## invalid_snippet_assignment
+
+Cannot reassign or bind to snippet parameter
+
+## invalid_derived_call
+
+`$derived.call(...)` has been replaced with `$derived.by(...)`
+
+## conflicting_property_name
+
+Cannot have a property and a component export with the same name
diff --git a/packages/svelte/messages/compile-errors/slots.md b/packages/svelte/messages/compile-errors/slots.md
new file mode 100644
index 0000000000..51213c5b5d
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/slots.md
@@ -0,0 +1,31 @@
+## invalid_slot_element_attribute
+
+`<slot>` can only receive attributes and (optionally) let directives
+
+## invalid_slot_attribute
+
+slot attribute must be a static value
+
+## invalid_slot_name_default
+
+`default` is a reserved word — it cannot be used as a slot name
+
+## invalid_slot_name
+
+slot attribute must be a static value
+
+## invalid_slot_placement
+
+Element with a slot='...' attribute must be a child of a component or a descendant of a custom element
+
+## duplicate_slot_name
+
+Duplicate slot name '%name%' in <%component%>
+
+## invalid_default_slot_content
+
+Found default slot content alongside an explicit slot="default"
+
+## conflicting_children_snippet
+
+Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block
diff --git a/packages/svelte/messages/compile-errors/special_elements.md b/packages/svelte/messages/compile-errors/special_elements.md
new file mode 100644
index 0000000000..6617d0e0fb
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/special_elements.md
@@ -0,0 +1,99 @@
+## invalid_svelte_option_attribute
+
+`<svelte:options>` can only receive static attributes
+
+## invalid_svelte_option_namespace
+
+Unsupported `<svelte:option>` value for "namespace". Valid values are "html", "svg" or "foreign"
+
+## tag_option_deprecated
+
+"tag" option is deprecated — use "customElement" instead
+
+## invalid_svelte_option_runes
+
+Unsupported `<svelte:option>` value for "runes". Valid values are true or false
+
+## invalid_svelte_option_accessors
+
+Unsupported `<svelte:option>` value for "accessors". Valid values are true or false
+
+## invalid_svelte_option_preserveWhitespace
+
+Unsupported `<svelte:option>` value for "preserveWhitespace". Valid values are true or false
+
+## invalid_svelte_option_immutable
+
+Unsupported `<svelte:option>` value for "immutable". Valid values are true or false
+
+## invalid_tag_property
+
+Tag name must be two or more words joined by the "-" character
+
+## invalid_svelte_option_customElement
+
+"customElement" must be a string literal defining a valid custom element name or an object of the form { tag: string; shadow?: "open" | "none"; props?: { [key: string]: { attribute?: string; reflect?: boolean; type: .. } } }
+
+## invalid_customElement_props_attribute
+
+"props" must be a statically analyzable object literal of the form "{ [key: string]: { attribute?: string; reflect?: boolean; type?: "String" | "Boolean" | "Number" | "Array" | "Object" }"
+
+## invalid_customElement_shadow_attribute
+
+"shadow" must be either "open" or "none"
+
+## unknown_svelte_option_attribute
+
+`<svelte:options>` unknown attribute '%name%'
+
+## illegal_svelte_head_attribute
+
+`<svelte:head>` cannot have attributes nor directives
+
+## invalid_svelte_fragment_attribute
+
+`<svelte:fragment>` can only have a slot attribute and (optionally) a let: directive
+
+## invalid_svelte_fragment_slot
+
+`<svelte:fragment>` slot attribute must have a static value
+
+## invalid_svelte_fragment_placement
+
+`<svelte:fragment>` must be the direct child of a component
+
+## invalid_svelte_element_placement
+
+<%name%> tags cannot be inside elements or blocks
+
+## duplicate_svelte_element
+
+A component can only have one <%name%> element
+
+## invalid_self_placement
+
+`<svelte:self>` components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components
+
+## missing_svelte_element_definition
+
+`<svelte:element>` must have a 'this' attribute
+
+## missing_svelte_component_definition
+
+`<svelte:component>` must have a 'this' attribute
+
+## invalid_svelte_element_definition
+
+Invalid element definition — must be an {expression}
+
+## invalid_svelte_component_definition
+
+Invalid component definition — must be an {expression}
+
+## invalid_svelte_tag
+
+Valid `<svelte:...>` tag names are %list%
+
+## conflicting_slot_usage
+
+Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migrate towards `{@render ...}` tags completely.
diff --git a/packages/svelte/messages/compile-errors/variables.md b/packages/svelte/messages/compile-errors/variables.md
new file mode 100644
index 0000000000..f1ac317b59
--- /dev/null
+++ b/packages/svelte/messages/compile-errors/variables.md
@@ -0,0 +1,19 @@
+## illegal_global
+
+`%name%` is an illegal variable name. To reference a global variable called `%name%`, use `globalThis.%name%`
+
+## duplicate_declaration
+
+`%name%` has already been declared
+
+## default_export
+
+A component cannot have a default export
+
+## illegal_variable_declaration
+
+Cannot declare same variable name which is imported inside `<script context="module">`
+
+## illegal_store_subscription
+
+Cannot subscribe to stores that are not declared at the top level of the component
diff --git a/packages/svelte/scripts/process-messages/index.js b/packages/svelte/scripts/process-messages/index.js
new file mode 100644
index 0000000000..52cb23aec3
--- /dev/null
+++ b/packages/svelte/scripts/process-messages/index.js
@@ -0,0 +1,213 @@
+// @ts-check
+import fs from 'node:fs';
+import * as acorn from 'acorn';
+import { walk } from 'zimmerframe';
+import * as esrap from 'esrap';
+
+const messages = {};
+const seen = new Set();
+
+for (const category of fs.readdirSync('messages')) {
+	messages[category] = {};
+
+	for (const file of fs.readdirSync(`messages/${category}`)) {
+		if (!file.endsWith('.md')) continue;
+
+		const markdown = fs.readFileSync(`messages/${category}/${file}`, 'utf-8');
+
+		for (const match of markdown.matchAll(/## ([\w]+)\n\n([^]+?)(?=$|\n\n## )/g)) {
+			const [_, code, text] = match;
+
+			if (seen.has(code)) {
+				throw new Error(`Duplicate message code ${category}/${code}`);
+			}
+
+			seen.add(code);
+			messages[category][code] = text.trim();
+		}
+	}
+}
+
+function transform(name, dest) {
+	const source = fs.readFileSync(new URL(`./templates/${name}.js`, import.meta.url), 'utf-8');
+
+	const comments = [];
+
+	const ast = acorn.parse(source, {
+		ecmaVersion: 'latest',
+		sourceType: 'module',
+		onComment: (block, value, start, end) => {
+			if (block && /\n/.test(value)) {
+				let a = start;
+				while (a > 0 && source[a - 1] !== '\n') a -= 1;
+
+				let b = a;
+				while (/[ \t]/.test(source[b])) b += 1;
+
+				const indentation = source.slice(a, b);
+				value = value.replace(new RegExp(`^${indentation}`, 'gm'), '');
+			}
+
+			comments.push({ type: block ? 'Block' : 'Line', value, start, end });
+		}
+	});
+
+	walk(ast, null, {
+		_(node, { next }) {
+			let comment;
+
+			while (comments[0] && comments[0].start < node.start) {
+				comment = comments.shift();
+				// @ts-expect-error
+				(node.leadingComments ||= []).push(comment);
+			}
+
+			next();
+
+			if (comments[0]) {
+				const slice = source.slice(node.end, comments[0].start);
+
+				if (/^[,) \t]*$/.test(slice)) {
+					// @ts-expect-error
+					node.trailingComments = [comments.shift()];
+				}
+			}
+		}
+	});
+
+	const category = messages[name];
+
+	// find the `export function CODE` node
+	const index = ast.body.findIndex((node) => {
+		if (
+			node.type === 'ExportNamedDeclaration' &&
+			node.declaration &&
+			node.declaration.type === 'FunctionDeclaration'
+		) {
+			return node.declaration.id.name === 'CODE';
+		}
+	});
+
+	if (index === -1) throw new Error(`missing export function CODE in ${name}.js`);
+
+	const template_node = ast.body[index];
+	ast.body.splice(index, 1);
+
+	for (const code in category) {
+		const message = category[code];
+		const vars = [];
+		for (const match of message.matchAll(/%(\w+)%/g)) {
+			const name = match[1];
+			if (!vars.includes(name)) {
+				vars.push(match[1]);
+			}
+		}
+
+		const clone = walk(/** @type {import('estree').Node} */ (template_node), null, {
+			// @ts-expect-error Block is a block comment, which is not recognised
+			Block(node, context) {
+				if (!node.value.includes('PARAMETER')) return;
+
+				const value = node.value
+					.split('\n')
+					.map((line) => {
+						if (line.includes('PARAMETER')) {
+							return vars.map((name) => ` * @param {string} ${name}`).join('\n');
+						}
+
+						return line;
+					})
+					.join('\n');
+
+				if (value !== node.value) {
+					return { ...node, value };
+				}
+			},
+			FunctionDeclaration(node, context) {
+				if (node.id.name !== 'CODE') return;
+
+				const params = [];
+
+				for (const param of node.params) {
+					if (param.type === 'Identifier' && param.name === 'PARAMETER') {
+						params.push(...vars.map((name) => ({ type: 'Identifier', name })));
+					} else {
+						params.push(param);
+					}
+				}
+
+				return /** @type {import('estree').FunctionDeclaration} */ ({
+					.../** @type {import('estree').FunctionDeclaration} */ (context.next()),
+					params,
+					id: {
+						...node.id,
+						name: code
+					}
+				});
+			},
+			Literal(node) {
+				if (node.value === 'CODE') {
+					return {
+						type: 'Literal',
+						value: code
+					};
+				}
+			},
+			Identifier(node) {
+				if (node.name !== 'MESSAGE') return;
+
+				if (/%\w+%/.test(message)) {
+					const parts = message.split(/(%\w+%)/);
+
+					/** @type {import('estree').Expression[]} */
+					const expressions = [];
+
+					/** @type {import('estree').TemplateElement[]} */
+					const quasis = [];
+
+					for (let i = 0; i < parts.length; i += 1) {
+						const part = parts[i];
+						if (i % 2 === 0) {
+							const str = part.replace(/(`|\$)/g, '\\$1');
+							quasis.push({
+								type: 'TemplateElement',
+								value: { raw: str, cooked: str },
+								tail: i === parts.length - 1
+							});
+						} else {
+							expressions.push({
+								type: 'Identifier',
+								name: part.slice(1, -1)
+							});
+						}
+					}
+
+					return {
+						type: 'TemplateLiteral',
+						expressions,
+						quasis
+					};
+				}
+
+				return {
+					type: 'Literal',
+					value: message
+				};
+			}
+		});
+
+		// @ts-expect-error
+		ast.body.push(clone);
+	}
+
+	// @ts-expect-error
+	const module = esrap.print(ast);
+
+	fs.writeFileSync(
+		dest,
+		`/* This file is generated by scripts/process-messages.js. Do not edit! */\n\n` + module.code,
+		'utf-8'
+	);
+}
+
+transform('compile-errors', 'src/compiler/errors.js');
diff --git a/packages/svelte/scripts/process-messages/templates/compile-errors.js b/packages/svelte/scripts/process-messages/templates/compile-errors.js
new file mode 100644
index 0000000000..96dcb72b3f
--- /dev/null
+++ b/packages/svelte/scripts/process-messages/templates/compile-errors.js
@@ -0,0 +1,74 @@
+/** @typedef {{ start?: number, end?: number }} NodeLike */
+
+// interface is duplicated between here (used internally) and ./interfaces.js
+// (exposed publicly), and I'm not sure how to avoid that
+export class CompileError extends Error {
+	name = 'CompileError';
+
+	/** @type {import('#compiler').CompileError['filename']} */
+	filename = undefined;
+
+	/** @type {import('#compiler').CompileError['position']} */
+	position = undefined;
+
+	/** @type {import('#compiler').CompileError['start']} */
+	start = undefined;
+
+	/** @type {import('#compiler').CompileError['end']} */
+	end = undefined;
+
+	/**
+	 *
+	 * @param {string} code
+	 * @param {string} message
+	 * @param {[number, number] | undefined} position
+	 */
+	constructor(code, message, position) {
+		super(message);
+		this.code = code;
+		this.position = position;
+	}
+
+	toString() {
+		let out = `${this.name}: ${this.message}`;
+
+		out += `\n(${this.code})`;
+
+		if (this.filename) {
+			out += `\n${this.filename}`;
+
+			if (this.start) {
+				out += `${this.start.line}:${this.start.column}`;
+			}
+		}
+
+		return out;
+	}
+}
+
+/**
+ *
+ * @param {null | number | NodeLike} node
+ * @param {string} code
+ * @param {string} message
+ * @returns {never}
+ */
+function e(node, code, message) {
+	const start = typeof node === 'number' ? node : node?.start;
+	const end = typeof node === 'number' ? node : node?.end;
+
+	throw new CompileError(
+		code,
+		message,
+		start !== undefined && end !== undefined ? [start, end] : undefined
+	);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} PARAMETER
+ * @returns {never}
+ */
+export function CODE(node, PARAMETER) {
+	e(node, 'CODE', MESSAGE);
+}
diff --git a/packages/svelte/src/compiler/errors.js b/packages/svelte/src/compiler/errors.js
index 71bc353336..ee2a961868 100644
--- a/packages/svelte/src/compiler/errors.js
+++ b/packages/svelte/src/compiler/errors.js
@@ -1,497 +1,16 @@
-/** @typedef {{ start?: number, end?: number }} NodeLike */
-/** @typedef {Record<string, (...args: any[]) => string>} Errors */
-
-/**
- * @param {Array<string | number>} items
- * @param {string} conjunction
- */
-function list(items, conjunction = 'or') {
-	if (items.length === 1) return items[0];
-	return `${items.slice(0, -1).join(', ')} ${conjunction} ${items[items.length - 1]}`;
-}
-
-/** @satisfies {Errors} */
-const internal = {
-	/** @param {string} message */
-	TODO: (message) => `TODO ${message}`,
-
-	/** @param {string} message */
-	INTERNAL: (message) =>
-		`Internal compiler error: ${message}. Please report this to https://github.com/sveltejs/svelte/issues`
-};
-
-/** @satisfies {Errors} */
-const parse = {
-	/** @param {string} name */
-	'unclosed-element': (name) => `<${name}> was left open`,
-	'unclosed-block': () => `Block was left open`,
-	'unexpected-block-close': () => `Unexpected block closing tag`,
-	/** @param {string} [expected]  */
-	'unexpected-eof': (expected) =>
-		`Unexpected end of input` + (expected ? ` (expected ${expected})` : ''),
-	/** @param {string} message */
-	'js-parse-error': (message) => message,
-	/** @param {string} token */
-	'expected-token': (token) => `Expected token ${token}`,
-	/** @param {string} word */
-	'unexpected-reserved-word': (word) =>
-		`'${word}' is a reserved word in JavaScript and cannot be used here`,
-	'missing-whitespace': () => `Expected whitespace`,
-	'expected-pattern': () => `Expected identifier or destructure pattern`,
-	'invalid-script-context': () =>
-		`If the context attribute is supplied, its value must be "module"`,
-	'invalid-elseif': () => `'elseif' should be 'else if'`,
-	'invalid-continuing-block-placement': () =>
-		`{:...} block is invalid at this position (did you forget to close the preceeding element or block?)`,
-	/**
-	 * @param {string} child
-	 * @param {string} parent
-	 */
-	'invalid-block-missing-parent': (child, parent) => `${child} block must be a child of ${parent}`,
-	/** @param {string} name */
-	'duplicate-block-part': (name) => `${name} cannot appear more than once within a block`,
-	'expected-block-type': () => `Expected 'if', 'each', 'await', 'key' or 'snippet'`,
-	'expected-identifier': () => `Expected an identifier`,
-	'invalid-debug': () => `{@debug ...} arguments must be identifiers, not arbitrary expressions`,
-	'invalid-const': () => `{@const ...} must be an assignment`,
-	/**
-	 * @param {string} location
-	 * @param {string} name
-	 */
-	'invalid-block-placement': (location, name) => `{#${name} ...} block cannot be ${location}`,
-	/**
-	 * @param {string} location
-	 * @param {string} name
-	 */
-	'invalid-tag-placement': (location, name) => `{@${name} ...} tag cannot be ${location}`,
-	'missing-attribute-value': () => `Expected attribute value`,
-	/** @param {string} delimiter */
-	'unclosed-attribute-value': (delimiter) => `Expected closing ${delimiter} character`,
-	'invalid-directive-value': () =>
-		`Directive value must be a JavaScript expression enclosed in curly braces`,
-	/** @param {string} type */
-	'empty-directive-name': (type) => `${type} name cannot be empty`,
-	/** @param {string} name */
-	'invalid-closing-tag': (name) => `</${name}> attempted to close an element that was not open`,
-	/**
-	 * @param {string} name
-	 * @param {string} reason
-	 */
-	'invalid-closing-tag-after-autoclose': (name, reason) =>
-		`</${name}> attempted to close element that was already automatically closed by <${reason}> (cannot nest <${reason}> inside <${name}>)`,
-	'invalid-dollar-binding': () =>
-		`The $ name is reserved, and cannot be used for variables and imports`,
-	'invalid-dollar-prefix': () =>
-		`The $ prefix is reserved, and cannot be used for variables and imports`,
-	'invalid-dollar-global': () =>
-		`The $ name is reserved. To reference a global variable called $, use globalThis.$`,
-	'illegal-subscription': () => `Cannot reference store value inside <script context="module">`,
-	'duplicate-style-element': () => `A component can have a single top-level <style> element`,
-	'duplicate-script-element': () =>
-		`A component can have a single top-level <script> element and/or a single top-level <script context="module"> element`,
-	'invalid-render-expression': () => '{@render ...} tags can only contain call expressions',
-	'invalid-render-arguments': () => 'expected at most one argument',
-	'invalid-render-call': () =>
-		'Calling a snippet function using apply, bind or call is not allowed',
-	'invalid-render-spread-argument': () => 'cannot use spread arguments in {@render ...} tags',
-	'invalid-snippet-rest-parameter': () =>
-		'snippets do not support rest parameters; use an array instead'
-};
-
-/** @satisfies {Errors} */
-const css = {
-	/** @param {string} message */
-	'css-parse-error': (message) => message,
-	'invalid-css-empty-declaration': () => `Declaration cannot be empty`,
-	'invalid-css-global-block-list': () =>
-		`A :global {...} block cannot be part of a selector list with more than one item`,
-	'invalid-css-global-block-modifier': () =>
-		`A :global {...} block cannot modify an existing selector`,
-	/** @param {string} name */
-	'invalid-css-global-block-combinator': (name) =>
-		`A :global {...} block cannot follow a ${name} combinator`,
-	'invalid-css-global-block-declaration': () =>
-		`A :global {...} block can only contain rules, not declarations`,
-	'invalid-css-global-placement': () =>
-		`:global(...) can be at the start or end of a selector sequence, but not in the middle`,
-	'invalid-css-global-selector': () => `:global(...) must contain exactly one selector`,
-	'invalid-css-global-selector-list': () =>
-		`:global(...) must not contain type or universal selectors when used in a compound selector`,
-	'invalid-css-type-selector-placement': () =>
-		`:global(...) must not be followed with a type selector`,
-	'invalid-css-selector': () => `Invalid selector`,
-	'invalid-css-identifier': () => 'Expected a valid CSS identifier',
-	'invalid-nesting-selector': () => `Nesting selectors can only be used inside a rule`,
-	'invalid-css-declaration': () => 'Declaration cannot be empty'
-};
-
-/** @satisfies {Errors} */
-const special_elements = {
-	'invalid-svelte-option-attribute': () => `<svelte:options> can only receive static attributes`,
-	'invalid-svelte-option-namespace': () =>
-		`Unsupported <svelte:option> value for "namespace". Valid values are "html", "svg" or "foreign".`,
-	'tag-option-deprecated': () => `"tag" option is deprecated — use "customElement" instead`,
-	'invalid-svelte-option-runes': () =>
-		`Unsupported <svelte:option> value for "runes". Valid values are true or false.`,
-	'invalid-svelte-option-accessors': () =>
-		'Unsupported <svelte:option> value for "accessors". Valid values are true or false.',
-	'invalid-svelte-option-preserveWhitespace': () =>
-		'Unsupported <svelte:option> value for "preserveWhitespace". Valid values are true or false.',
-	'invalid-svelte-option-immutable': () =>
-		'Unsupported <svelte:option> value for "immutable". Valid values are true or false.',
-	'invalid-tag-property': () => 'tag name must be two or more words joined by the "-" character',
-	'invalid-svelte-option-customElement': () =>
-		'"customElement" must be a string literal defining a valid custom element name or an object of the form ' +
-		'{ tag: string; shadow?: "open" | "none"; props?: { [key: string]: { attribute?: string; reflect?: boolean; type: .. } } }',
-	'invalid-customElement-props-attribute': () =>
-		'"props" must be a statically analyzable object literal of the form ' +
-		'"{ [key: string]: { attribute?: string; reflect?: boolean; type?: "String" | "Boolean" | "Number" | "Array" | "Object" }"',
-	'invalid-customElement-shadow-attribute': () => '"shadow" must be either "open" or "none"',
-	'unknown-svelte-option-attribute': /** @param {string} name */ (name) =>
-		`<svelte:options> unknown attribute '${name}'`,
-	'illegal-svelte-head-attribute': () => '<svelte:head> cannot have attributes nor directives',
-	'invalid-svelte-fragment-attribute': () =>
-		`<svelte:fragment> can only have a slot attribute and (optionally) a let: directive`,
-	'invalid-svelte-fragment-slot': () => `<svelte:fragment> slot attribute must have a static value`,
-	'invalid-svelte-fragment-placement': () =>
-		`<svelte:fragment> must be the direct child of a component`,
-	/** @param {string} name */
-	'invalid-svelte-element-placement': (name) =>
-		`<${name}> tags cannot be inside elements or blocks`,
-	/** @param {string} name */
-	'duplicate-svelte-element': (name) => `A component can only have one <${name}> element`,
-	'invalid-self-placement': () =>
-		`<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components`,
-	'missing-svelte-element-definition': () => `<svelte:element> must have a 'this' attribute`,
-	'missing-svelte-component-definition': () => `<svelte:component> must have a 'this' attribute`,
-	'invalid-svelte-element-definition': () => `Invalid element definition — must be an {expression}`,
-	'invalid-svelte-component-definition': () =>
-		`Invalid component definition — must be an {expression}`,
-	/**
-	 * @param {string[]} tags
-	 * @param {string | null} match
-	 */
-	'invalid-svelte-tag': (tags, match) =>
-		`Valid <svelte:...> tag names are ${list(tags)}${match ? ' (did you mean ' + match + '?)' : ''}`,
-	'conflicting-slot-usage': () =>
-		`Cannot use <slot> syntax and {@render ...} tags in the same component. Migrate towards {@render ...} tags completely.`
-};
-
-/** @satisfies {Errors} */
-const runes = {
-	'invalid-legacy-props': () => `Cannot use $$props in runes mode`,
-	'invalid-legacy-rest-props': () => `Cannot use $$restProps in runes mode`,
-	'invalid-legacy-reactive-statement': () =>
-		`$: is not allowed in runes mode, use $derived or $effect instead`,
-	'invalid-legacy-export': () => `Cannot use \`export let\` in runes mode — use $props instead`,
-	/** @param {string} rune */
-	'invalid-rune-usage': (rune) => `Cannot use ${rune} rune in non-runes mode`,
-	'invalid-state-export': () =>
-		`Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties`,
-	'invalid-derived-export': () =>
-		`Cannot export derived state from a module. To expose the current derived value, export a function returning its value`,
-	'invalid-props-id': () => `$props() can only be used with an object destructuring pattern`,
-	'invalid-props-pattern': () =>
-		`$props() assignment must not contain nested properties or computed keys`,
-	'invalid-props-location': () =>
-		`$props() can only be used at the top level of components as a variable declaration initializer`,
-	'invalid-bindable-location': () => `$bindable() can only be used inside a $props() declaration`,
-	/** @param {string} rune */
-	'invalid-state-location': (rune) =>
-		`${rune}(...) can only be used as a variable declaration initializer or a class field`,
-	'invalid-effect-location': () => `$effect() can only be used as an expression statement`,
-	'invalid-host-location': () =>
-		`$host() can only be used inside custom element component instances`,
-	/**
-	 * @param {boolean} is_binding
-	 * @param {boolean} show_details
-	 */
-	'invalid-const-assignment': (is_binding, show_details) =>
-		`Invalid ${is_binding ? 'binding' : 'assignment'} to const variable${
-			show_details
-				? ' ($derived values, let: directives, :then/:catch variables and @const declarations count as const)'
-				: ''
-		}`,
-	'invalid-derived-assignment': () => `Invalid assignment to derived state`,
-	'invalid-derived-binding': () => `Invalid binding to derived state`,
-	/**
-	 * @param {string} rune
-	 * @param {Array<number | string>} args
-	 */
-	'invalid-rune-args-length': (rune, args) =>
-		`${rune} can only be called with ${list(args, 'or')} ${
-			args.length === 1 && args[0] === 1 ? 'argument' : 'arguments'
-		}`,
-	/** @param {string} name */
-	'invalid-runes-mode-import': (name) => `${name} cannot be used in runes mode`,
-	'duplicate-props-rune': () => `Cannot use $props() more than once`,
-	'invalid-each-assignment': () =>
-		`Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. 'array[i] = value' instead of 'entry = value')`,
-	'invalid-snippet-assignment': () => `Cannot reassign or bind to snippet parameter`,
-	'invalid-derived-call': () => `$derived.call(...) has been replaced with $derived.by(...)`,
-	'conflicting-property-name': () =>
-		`Cannot have a property and a component export with the same name`
-};
-
-/** @satisfies {Errors} */
-const elements = {
-	'invalid-textarea-content': () =>
-		`A <textarea> can have either a value attribute or (equivalently) child content, but not both`,
-	'invalid-void-content': () => `Void elements cannot have children or closing tags`,
-	/** @param {string} name */
-	'invalid-element-content': (name) => `<${name}> cannot have children`,
-	'invalid-tag-name': () => 'Expected valid tag name',
-	/**
-	 * @param {string} node
-	 * @param {string} parent
-	 */
-	'invalid-node-placement': (node, parent) => `${node} is invalid inside <${parent}>`,
-	'illegal-title-attribute': () => '<title> cannot have attributes nor directives',
-	'invalid-title-content': () => '<title> can only contain text and {tags}'
-};
-
-/** @satisfies {Errors} */
-const components = {
-	'invalid-component-directive': () => `This type of directive is not valid on components`
-};
-
-/** @satisfies {Errors} */
-const attributes = {
-	'empty-attribute-shorthand': () => `Attribute shorthand cannot be empty`,
-	'duplicate-attribute': () => `Attributes need to be unique`,
-	'invalid-event-attribute-value': () =>
-		`Event attribute must be a JavaScript expression, not a string`,
-	/** @param {string} name */
-	'invalid-attribute-name': (name) => `'${name}' is not a valid attribute name`,
-	/** @param {'no-each' | 'each-key' | 'child'} type */
-	'invalid-animation': (type) =>
-		type === 'no-each'
-			? `An element that uses the animate directive must be the immediate child of a keyed each block`
-			: type === 'each-key'
-				? `An element that uses the animate directive must be used inside a keyed each block. Did you forget to add a key to your each block?`
-				: `An element that uses the animate directive must be the sole child of a keyed each block`,
-	'duplicate-animation': () => `An element can only have one 'animate' directive`,
-	/** @param {string[] | undefined} [modifiers] */
-	'invalid-event-modifier': (modifiers) =>
-		modifiers
-			? `Valid event modifiers are ${modifiers.slice(0, -1).join(', ')} or ${modifiers.slice(-1)}`
-			: `Event modifiers other than 'once' can only be used on DOM elements`,
-	/**
-	 * @param {string} modifier1
-	 * @param {string} modifier2
-	 */
-	'invalid-event-modifier-combination': (modifier1, modifier2) =>
-		`The '${modifier1}' and '${modifier2}' modifiers cannot be used together`,
-	/**
-	 * @param {string} directive1
-	 * @param {string} directive2
-	 */
-	'duplicate-transition': (directive1, directive2) => {
-		/** @param {string} _directive */
-		function describe(_directive) {
-			return _directive === 'transition' ? "a 'transition'" : `an '${_directive}'`;
-		}
-
-		return directive1 === directive2
-			? `An element can only have one '${directive1}' directive`
-			: `An element cannot have both ${describe(directive1)} directive and ${describe(
-					directive2
-				)} directive`;
-	},
-	'invalid-let-directive-placement': () => 'let directive at invalid position',
-	'invalid-style-directive-modifier': () =>
-		`Invalid 'style:' modifier. Valid modifiers are: 'important'`,
-	'invalid-sequence-expression': () =>
-		`Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses`
-};
-
-/** @satisfies {Errors} */
-const slots = {
-	'invalid-slot-element-attribute': () =>
-		`<slot> can only receive attributes and (optionally) let directives`,
-	'invalid-slot-attribute': () => `slot attribute must be a static value`,
-	/** @param {boolean} is_default */
-	'invalid-slot-name': (is_default) =>
-		is_default
-			? `default is a reserved word — it cannot be used as a slot name`
-			: `slot attribute must be a static value`,
-	'invalid-slot-placement': () =>
-		`Element with a slot='...' attribute must be a child of a component or a descendant of a custom element`,
-	/** @param {string} name @param {string} component */
-	'duplicate-slot-name': (name, component) => `Duplicate slot name '${name}' in <${component}>`,
-	'invalid-default-slot-content': () =>
-		`Found default slot content alongside an explicit slot="default"`,
-	'conflicting-children-snippet': () =>
-		`Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block`
-};
-
-/** @satisfies {Errors} */
-const bindings = {
-	'invalid-binding-expression': () => `Can only bind to an Identifier or MemberExpression`,
-	'invalid-binding-value': () => `Can only bind to state or props`,
-	/**
-	 * @param {string} binding
-	 * @param {string} [elements]
-	 * @param {string} [post]
-	 */
-	'invalid-binding': (binding, elements, post = '') =>
-		(elements
-			? `'${binding}' binding can only be used with ${elements}`
-			: `'${binding}' is not a valid binding`) + post,
-	'invalid-type-attribute': () =>
-		`'type' attribute must be a static text value if input uses two-way binding`,
-	'invalid-multiple-attribute': () =>
-		`'multiple' attribute must be static if select uses two-way binding`,
-	'missing-contenteditable-attribute': () =>
-		`'contenteditable' attribute is required for textContent, innerHTML and innerText two-way bindings`,
-	'dynamic-contenteditable-attribute': () =>
-		`'contenteditable' attribute cannot be dynamic if element uses two-way binding`
-};
-
-/** @satisfies {Errors} */
-const variables = {
-	'illegal-global': /** @param {string} name */ (name) =>
-		`${name} is an illegal variable name. To reference a global variable called ${name}, use globalThis.${name}`,
-	/** @param {string} name */
-	'duplicate-declaration': (name) => `'${name}' has already been declared`,
-	'default-export': () => `A component cannot have a default export`,
-	'illegal-variable-declaration': () =>
-		'Cannot declare same variable name which is imported inside <script context="module">',
-	'illegal-store-subscription': () =>
-		'Cannot subscribe to stores that are not declared at the top level of the component'
-};
-
-/** @satisfies {Errors} */
-const legacy_reactivity = {
-	'cyclical-reactive-declaration': /** @param {string[]} cycle */ (cycle) =>
-		`Cyclical dependency detected: ${cycle.join(' → ')}`
-};
-
-/** @satisfies {Errors} */
-const compiler_options = {
-	/** @param {string} msg */
-	'invalid-compiler-option': (msg) => `Invalid compiler option: ${msg}`,
-	/** @param {string} msg */
-	'removed-compiler-option': (msg) => `Invalid compiler option: ${msg}`
-};
-
-/** @satisfies {Errors} */
-const const_tag = {
-	'invalid-const-placement': () =>
-		`{@const} must be the immediate child of {#snippet}, {#if}, {:else if}, {:else}, {#each}, {:then}, {:catch}, <svelte:fragment> or <Component>`
-};
-
-/** @satisfies {Errors} */
-const errors = {
-	...internal,
-	...parse,
-	...css,
-	...special_elements,
-	...runes,
-	...elements,
-	...components,
-	...attributes,
-	...slots,
-	...bindings,
-	...variables,
-	...compiler_options,
-	...legacy_reactivity,
-	...const_tag
-
-	// missing_contenteditable_attribute: {
-	// 	code: 'missing-contenteditable-attribute',
-	// 	message:
-	// 		"'contenteditable' attribute is required for textContent, innerHTML and innerText two-way bindings"
-	// },
-	// textarea_duplicate_value: {
-	// 	code: 'textarea-duplicate-value',
-	// 	message:
-	// 		'A <textarea> can have either a value attribute or (equivalently) child content, but not both'
-	// },
-	// invalid_attribute_head: {
-	// 	code: 'invalid-attribute',
-	// 	message: '<svelte:head> should not have any attributes or directives'
-	// },
-	// invalid_action: {
-	// 	code: 'invalid-action',
-	// 	message: 'Actions can only be applied to DOM elements, not components'
-	// },
-	// invalid_class: {
-	// 	code: 'invalid-class',
-	// 	message: 'Classes can only be applied to DOM elements, not components'
-	// },
-	// invalid_transition: {
-	// 	code: 'invalid-transition',
-	// 	message: 'Transitions can only be applied to DOM elements, not components'
-	// },
-	// invalid_let: {
-	// 	code: 'invalid-let',
-	// 	message: 'let directive value must be an identifier or an object/array pattern'
-	// },
-	// invalid_slot_directive: {
-	// 	code: 'invalid-slot-directive',
-	// 	message: '<slot> cannot have directives'
-	// },
-	// dynamic_slot_name: {
-	// 	code: 'dynamic-slot-name',
-	// 	message: '<slot> name cannot be dynamic'
-	// },
-	// invalid_slot_attribute_value_missing: {
-	// 	code: 'invalid-slot-attribute',
-	// 	message: 'slot attribute value is missing'
-	// },
-	// illegal_structure_title: {
-	// 	code: 'illegal-structure',
-	// 	message: '<title> can only contain text and {tags}'
-	// },
-	// duplicate_transition: /**
-	//  * @param {string} directive
-	//  * @param {string} parent_directive
-	//  */ (directive, parent_directive) => {
-	// 	/** @param {string} _directive */
-	// 	function describe(_directive) {
-	// 		return _directive === 'transition' ? "a 'transition'" : `an '${_directive}'`;
-	// 	}
-	// 	const message =
-	// 		directive === parent_directive
-	// 			? `An element can only have one '${directive}' directive`
-	// 			: `An element cannot have both ${describe(parent_directive)} directive and ${describe(
-	// 					directive
-	// 			  )} directive`;
-	// 	return {
-	// 		code: 'duplicate-transition',
-	// 		message
-	// 	};
-	// },
-	// default_export: {
-	// 	code: 'default-export',
-	// 	message: 'A component cannot have a default export'
-	// },
-	// illegal_declaration: {
-	// 	code: 'illegal-declaration',
-	// 	message: 'The $ prefix is reserved, and cannot be used for variable and import names'
-	// },
-	// invalid_directive_value: {
-	// 	code: 'invalid-directive-value',
-	// 	message:
-	// 		'Can only bind to an identifier (e.g. `foo`) or a member expression (e.g. `foo.bar` or `foo[baz]`)'
-	// },
-};
+/* This file is generated by scripts/process-messages.js. Do not edit! */
 
+/** @typedef {{ start?: number, end?: number }} NodeLike */
 // interface is duplicated between here (used internally) and ./interfaces.js
 // (exposed publicly), and I'm not sure how to avoid that
 export class CompileError extends Error {
 	name = 'CompileError';
-
 	/** @type {import('#compiler').CompileError['filename']} */
 	filename = undefined;
-
 	/** @type {import('#compiler').CompileError['position']} */
 	position = undefined;
-
 	/** @type {import('#compiler').CompileError['start']} */
 	start = undefined;
-
 	/** @type {import('#compiler').CompileError['end']} */
 	end = undefined;
 
@@ -525,24 +44,1358 @@ export class CompileError extends Error {
 }
 
 /**
- * @template {Exclude<keyof typeof errors, 'TODO'>} T
- * @param {NodeLike | number | null} node
- * @param {T} code
- * @param  {Parameters<typeof errors[T]>} args
+ *
+ * @param {null | number | NodeLike} node
+ * @param {string} code
+ * @param {string} message
  * @returns {never}
  */
-export function error(node, code, ...args) {
-	const fn = errors[code];
-
-	// @ts-expect-error
-	const message = fn(...args);
-
+function e(node, code, message) {
 	const start = typeof node === 'number' ? node : node?.start;
 	const end = typeof node === 'number' ? node : node?.end;
 
-	throw new CompileError(
-		code,
-		message,
-		start !== undefined && end !== undefined ? [start, end] : undefined
-	);
+	throw new CompileError(code, message, start !== undefined && end !== undefined ? [start, end] : undefined);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function empty_attribute_shorthand(node) {
+	e(node, "empty_attribute_shorthand", "Attribute shorthand cannot be empty");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function duplicate_attribute(node) {
+	e(node, "duplicate_attribute", "Attributes need to be unique");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_event_attribute_value(node) {
+	e(node, "invalid_event_attribute_value", "Event attribute must be a JavaScript expression, not a string");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function invalid_attribute_name(node, name) {
+	e(node, "invalid_attribute_name", `'${name}' is not a valid attribute name`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function animation_invalid_placement(node) {
+	e(node, "animation_invalid_placement", "An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function animation_missing_key(node) {
+	e(node, "animation_missing_key", "An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block. Did you forget to add a key to your each block?");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function animation_duplicate(node) {
+	e(node, "animation_duplicate", "An element can only have one 'animate' directive");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} list
+ * @returns {never}
+ */
+export function invalid_event_modifier(node, list) {
+	e(node, "invalid_event_modifier", `Valid event modifiers are ${list}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_component_event_modifier(node) {
+	e(node, "invalid_component_event_modifier", "Event modifiers other than 'once' can only be used on DOM elements");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} modifier1
+ * @param {string} modifier2
+ * @returns {never}
+ */
+export function invalid_event_modifier_combination(node, modifier1, modifier2) {
+	e(node, "invalid_event_modifier_combination", `The '${modifier1}' and '${modifier2}' modifiers cannot be used together`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} type
+ * @returns {never}
+ */
+export function transition_duplicate(node, type) {
+	e(node, "transition_duplicate", `Cannot use multiple \`${type}:\` directives on a single element`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} type
+ * @param {string} existing
+ * @returns {never}
+ */
+export function transition_conflict(node, type, existing) {
+	e(node, "transition_conflict", `Cannot use \`${type}:\` alongside existing \`${existing}:\` directive`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_let_directive_placement(node) {
+	e(node, "invalid_let_directive_placement", "`let:` directive at invalid position");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_style_directive_modifier(node) {
+	e(node, "invalid_style_directive_modifier", "Invalid 'style:' modifier. Valid modifiers are: 'important'");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_sequence_expression(node) {
+	e(node, "invalid_sequence_expression", "Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_binding_expression(node) {
+	e(node, "invalid_binding_expression", "Can only bind to an Identifier or MemberExpression");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_binding_value(node) {
+	e(node, "invalid_binding_value", "Can only bind to state or props");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @param {string} elements
+ * @returns {never}
+ */
+export function bind_invalid_target(node, name, elements) {
+	e(node, "bind_invalid_target", `\`bind:${name}\` can only be used with ${elements}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function bind_invalid(node, name) {
+	e(node, "bind_invalid", `\`bind:${name}\` is not a valid binding`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @param {string} explanation
+ * @returns {never}
+ */
+export function bind_invalid_detailed(node, name, explanation) {
+	e(node, "bind_invalid_detailed", `\`bind:${name}\` is not a valid binding. ${explanation}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_type_attribute(node) {
+	e(node, "invalid_type_attribute", "'type' attribute must be a static text value if input uses two-way binding");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_multiple_attribute(node) {
+	e(node, "invalid_multiple_attribute", "'multiple' attribute must be static if select uses two-way binding");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function missing_contenteditable_attribute(node) {
+	e(node, "missing_contenteditable_attribute", "'contenteditable' attribute is required for textContent, innerHTML and innerText two-way bindings");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function dynamic_contenteditable_attribute(node) {
+	e(node, "dynamic_contenteditable_attribute", "'contenteditable' attribute cannot be dynamic if element uses two-way binding");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} msg
+ * @returns {never}
+ */
+export function invalid_compiler_option(node, msg) {
+	e(node, "invalid_compiler_option", `Invalid compiler option: ${msg}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} msg
+ * @returns {never}
+ */
+export function removed_compiler_option(node, msg) {
+	e(node, "removed_compiler_option", `Invalid compiler option: ${msg}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_component_directive(node) {
+	e(node, "invalid_component_directive", "This type of directive is not valid on components");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_const_placement(node) {
+	e(node, "invalid_const_placement", "{@const} must be the immediate child of {#snippet}, {#if}, {:else if}, {:else}, {#each}, {:then}, {:catch}, <svelte:fragment> or <Component>");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_empty_declaration(node) {
+	e(node, "invalid_css_empty_declaration", "Declaration cannot be empty");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_global_block_list(node) {
+	e(node, "invalid_css_global_block_list", "A :global {...} block cannot be part of a selector list with more than one item");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_global_block_modifier(node) {
+	e(node, "invalid_css_global_block_modifier", "A :global {...} block cannot modify an existing selector");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function invalid_css_global_block_combinator(node, name) {
+	e(node, "invalid_css_global_block_combinator", `A :global {...} block cannot follow a ${name} combinator`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_global_block_declaration(node) {
+	e(node, "invalid_css_global_block_declaration", "A :global {...} block can only contain rules, not declarations");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_global_placement(node) {
+	e(node, "invalid_css_global_placement", ":global(...) can be at the start or end of a selector sequence, but not in the middle");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_global_selector(node) {
+	e(node, "invalid_css_global_selector", ":global(...) must contain exactly one selector");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_global_selector_list(node) {
+	e(node, "invalid_css_global_selector_list", ":global(...) must not contain type or universal selectors when used in a compound selector");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_type_selector_placement(node) {
+	e(node, "invalid_css_type_selector_placement", ":global(...) must not be followed with a type selector");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_selector(node) {
+	e(node, "invalid_css_selector", "Invalid selector");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_identifier(node) {
+	e(node, "invalid_css_identifier", "Expected a valid CSS identifier");
 }
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_nesting_selector(node) {
+	e(node, "invalid_nesting_selector", "Nesting selectors can only be used inside a rule");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_css_declaration(node) {
+	e(node, "invalid_css_declaration", "Declaration cannot be empty");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_textarea_content(node) {
+	e(node, "invalid_textarea_content", "A `<textarea>` can have either a value attribute or (equivalently) child content, but not both");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_void_content(node) {
+	e(node, "invalid_void_content", "Void elements cannot have children or closing tags");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function invalid_element_content(node, name) {
+	e(node, "invalid_element_content", `<${name}> cannot have children`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_tag_name(node) {
+	e(node, "invalid_tag_name", "Expected valid tag name");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} thing
+ * @param {string} parent
+ * @returns {never}
+ */
+export function invalid_node_placement(node, thing, parent) {
+	e(node, "invalid_node_placement", `${thing} is invalid inside <${parent}>`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function illegal_title_attribute(node) {
+	e(node, "illegal_title_attribute", "`<title>` cannot have attributes nor directives");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_title_content(node) {
+	e(node, "invalid_title_content", "`<title>` can only contain text and {tags}");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} cycle
+ * @returns {never}
+ */
+export function cyclical_reactive_declaration(node, cycle) {
+	e(node, "cyclical_reactive_declaration", `Cyclical dependency detected: ${cycle}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function unclosed_element(node, name) {
+	e(node, "unclosed_element", `\`<${name}>\` was left open`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function unclosed_block(node) {
+	e(node, "unclosed_block", "Block was left open");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function unexpected_block_close(node) {
+	e(node, "unexpected_block_close", "Unexpected block closing tag");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function unexpected_eof(node) {
+	e(node, "unexpected_eof", "Unexpected end of input");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} message
+ * @returns {never}
+ */
+export function js_parse_error(node, message) {
+	e(node, "js_parse_error", `${message}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} token
+ * @returns {never}
+ */
+export function expected_token(node, token) {
+	e(node, "expected_token", `Expected token ${token}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} word
+ * @returns {never}
+ */
+export function unexpected_reserved_word(node, word) {
+	e(node, "unexpected_reserved_word", `'${word}' is a reserved word in JavaScript and cannot be used here`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function missing_whitespace(node) {
+	e(node, "missing_whitespace", "Expected whitespace");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function expected_pattern(node) {
+	e(node, "expected_pattern", "Expected identifier or destructure pattern");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_script_context(node) {
+	e(node, "invalid_script_context", "If the context attribute is supplied, its value must be \"module\"");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_elseif(node) {
+	e(node, "invalid_elseif", "'elseif' should be 'else if'");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_continuing_block_placement(node) {
+	e(node, "invalid_continuing_block_placement", "{:...} block is invalid at this position (did you forget to close the preceeding element or block?)");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} child
+ * @param {string} parent
+ * @returns {never}
+ */
+export function invalid_block_missing_parent(node, child, parent) {
+	e(node, "invalid_block_missing_parent", `${child} block must be a child of ${parent}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function duplicate_block_part(node, name) {
+	e(node, "duplicate_block_part", `${name} cannot appear more than once within a block`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function expected_block_type(node) {
+	e(node, "expected_block_type", "Expected 'if', 'each', 'await', 'key' or 'snippet'");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function expected_identifier(node) {
+	e(node, "expected_identifier", "Expected an identifier");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_debug(node) {
+	e(node, "invalid_debug", "{@debug ...} arguments must be identifiers, not arbitrary expressions");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_const(node) {
+	e(node, "invalid_const", "{@const ...} must be an assignment");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @param {string} location
+ * @returns {never}
+ */
+export function invalid_block_placement(node, name, location) {
+	e(node, "invalid_block_placement", `{#${name} ...} block cannot be ${location}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @param {string} location
+ * @returns {never}
+ */
+export function invalid_tag_placement(node, name, location) {
+	e(node, "invalid_tag_placement", `{@${name} ...} tag cannot be ${location}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function missing_attribute_value(node) {
+	e(node, "missing_attribute_value", "Expected attribute value");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} delimiter
+ * @returns {never}
+ */
+export function unclosed_attribute_value(node, delimiter) {
+	e(node, "unclosed_attribute_value", `Expected closing ${delimiter} character`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_directive_value(node) {
+	e(node, "invalid_directive_value", "Directive value must be a JavaScript expression enclosed in curly braces");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} type
+ * @returns {never}
+ */
+export function empty_directive_name(node, type) {
+	e(node, "empty_directive_name", `${type} name cannot be empty`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function invalid_closing_tag(node, name) {
+	e(node, "invalid_closing_tag", `</${name}> attempted to close an element that was not open`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @param {string} reason
+ * @returns {never}
+ */
+export function invalid_closing_tag_after_autoclose(node, name, reason) {
+	e(node, "invalid_closing_tag_after_autoclose", `</${name}> attempted to close element that was already automatically closed by <${reason}> (cannot nest <${reason}> inside <${name}>)`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_dollar_binding(node) {
+	e(node, "invalid_dollar_binding", "The $ name is reserved, and cannot be used for variables and imports");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_dollar_prefix(node) {
+	e(node, "invalid_dollar_prefix", "The $ prefix is reserved, and cannot be used for variables and imports");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_dollar_global(node) {
+	e(node, "invalid_dollar_global", "The $ name is reserved. To reference a global variable called $, use globalThis.$");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function illegal_subscription(node) {
+	e(node, "illegal_subscription", "Cannot reference store value inside `<script context=\"module\">`");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function duplicate_style_element(node) {
+	e(node, "duplicate_style_element", "A component can have a single top-level `<style>` element");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function duplicate_script_element(node) {
+	e(node, "duplicate_script_element", "A component can have a single top-level `<script>` element and/or a single top-level `<script context=\"module\">` element");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_render_expression(node) {
+	e(node, "invalid_render_expression", "{@render ...} tags can only contain call expressions");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_render_arguments(node) {
+	e(node, "invalid_render_arguments", "expected at most one argument");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_render_call(node) {
+	e(node, "invalid_render_call", "Calling a snippet function using apply, bind or call is not allowed");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_render_spread_argument(node) {
+	e(node, "invalid_render_spread_argument", "cannot use spread arguments in {@render ...} tags");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_snippet_rest_parameter(node) {
+	e(node, "invalid_snippet_rest_parameter", "snippets do not support rest parameters; use an array instead");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_legacy_props(node) {
+	e(node, "invalid_legacy_props", "Cannot use `$$props` in runes mode");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_legacy_rest_props(node) {
+	e(node, "invalid_legacy_rest_props", "Cannot use `$$restProps` in runes mode");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_legacy_reactive_statement(node) {
+	e(node, "invalid_legacy_reactive_statement", "`$:` is not allowed in runes mode, use `$derived` or `$effect` instead");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_legacy_export(node) {
+	e(node, "invalid_legacy_export", "Cannot use `export let` in runes mode — use $props instead");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} rune
+ * @returns {never}
+ */
+export function invalid_rune_usage(node, rune) {
+	e(node, "invalid_rune_usage", `Cannot use ${rune} rune in non-runes mode`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_state_export(node) {
+	e(node, "invalid_state_export", "Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_derived_export(node) {
+	e(node, "invalid_derived_export", "Cannot export derived state from a module. To expose the current derived value, export a function returning its value");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_props_id(node) {
+	e(node, "invalid_props_id", "`$props()` can only be used with an object destructuring pattern");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_props_pattern(node) {
+	e(node, "invalid_props_pattern", "`$props()` assignment must not contain nested properties or computed keys");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_props_location(node) {
+	e(node, "invalid_props_location", "`$props()` can only be used at the top level of components as a variable declaration initializer");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_bindable_location(node) {
+	e(node, "invalid_bindable_location", "`$bindable()` can only be used inside a `$props()` declaration");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} rune
+ * @returns {never}
+ */
+export function invalid_state_location(node, rune) {
+	e(node, "invalid_state_location", `\`${rune}(...)\` can only be used as a variable declaration initializer or a class field`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_effect_location(node) {
+	e(node, "invalid_effect_location", "`$effect()` can only be used as an expression statement");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_host_location(node) {
+	e(node, "invalid_host_location", "`$host()` can only be used inside custom element component instances");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} thing
+ * @returns {never}
+ */
+export function invalid_assignment(node, thing) {
+	e(node, "invalid_assignment", `Cannot assign to ${thing}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} thing
+ * @returns {never}
+ */
+export function invalid_binding(node, thing) {
+	e(node, "invalid_binding", `Cannot bind to ${thing}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} rune
+ * @returns {never}
+ */
+export function invalid_rune_args(node, rune) {
+	e(node, "invalid_rune_args", `\`${rune}\` cannot be called with arguments`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} rune
+ * @param {string} args
+ * @returns {never}
+ */
+export function invalid_rune_args_length(node, rune, args) {
+	e(node, "invalid_rune_args_length", `\`${rune}\` must be called with ${args}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function invalid_runes_mode_import(node, name) {
+	e(node, "invalid_runes_mode_import", `${name} cannot be used in runes mode`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function duplicate_props_rune(node) {
+	e(node, "duplicate_props_rune", "Cannot use `$props()` more than once");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_each_assignment(node) {
+	e(node, "invalid_each_assignment", "Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_snippet_assignment(node) {
+	e(node, "invalid_snippet_assignment", "Cannot reassign or bind to snippet parameter");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_derived_call(node) {
+	e(node, "invalid_derived_call", "`$derived.call(...)` has been replaced with `$derived.by(...)`");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function conflicting_property_name(node) {
+	e(node, "conflicting_property_name", "Cannot have a property and a component export with the same name");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_slot_element_attribute(node) {
+	e(node, "invalid_slot_element_attribute", "`<slot>` can only receive attributes and (optionally) let directives");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_slot_attribute(node) {
+	e(node, "invalid_slot_attribute", "slot attribute must be a static value");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_slot_name_default(node) {
+	e(node, "invalid_slot_name_default", "`default` is a reserved word — it cannot be used as a slot name");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_slot_name(node) {
+	e(node, "invalid_slot_name", "slot attribute must be a static value");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_slot_placement(node) {
+	e(node, "invalid_slot_placement", "Element with a slot='...' attribute must be a child of a component or a descendant of a custom element");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @param {string} component
+ * @returns {never}
+ */
+export function duplicate_slot_name(node, name, component) {
+	e(node, "duplicate_slot_name", `Duplicate slot name '${name}' in <${component}>`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_default_slot_content(node) {
+	e(node, "invalid_default_slot_content", "Found default slot content alongside an explicit slot=\"default\"");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function conflicting_children_snippet(node) {
+	e(node, "conflicting_children_snippet", "Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_attribute(node) {
+	e(node, "invalid_svelte_option_attribute", "`<svelte:options>` can only receive static attributes");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_namespace(node) {
+	e(node, "invalid_svelte_option_namespace", "Unsupported `<svelte:option>` value for \"namespace\". Valid values are \"html\", \"svg\" or \"foreign\"");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function tag_option_deprecated(node) {
+	e(node, "tag_option_deprecated", "\"tag\" option is deprecated — use \"customElement\" instead");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_runes(node) {
+	e(node, "invalid_svelte_option_runes", "Unsupported `<svelte:option>` value for \"runes\". Valid values are true or false");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_accessors(node) {
+	e(node, "invalid_svelte_option_accessors", "Unsupported `<svelte:option>` value for \"accessors\". Valid values are true or false");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_preserveWhitespace(node) {
+	e(node, "invalid_svelte_option_preserveWhitespace", "Unsupported `<svelte:option>` value for \"preserveWhitespace\". Valid values are true or false");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_immutable(node) {
+	e(node, "invalid_svelte_option_immutable", "Unsupported `<svelte:option>` value for \"immutable\". Valid values are true or false");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_tag_property(node) {
+	e(node, "invalid_tag_property", "Tag name must be two or more words joined by the \"-\" character");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_option_customElement(node) {
+	e(node, "invalid_svelte_option_customElement", "\"customElement\" must be a string literal defining a valid custom element name or an object of the form { tag: string; shadow?: \"open\" | \"none\"; props?: { [key: string]: { attribute?: string; reflect?: boolean; type: .. } } }");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_customElement_props_attribute(node) {
+	e(node, "invalid_customElement_props_attribute", "\"props\" must be a statically analyzable object literal of the form \"{ [key: string]: { attribute?: string; reflect?: boolean; type?: \"String\" | \"Boolean\" | \"Number\" | \"Array\" | \"Object\" }\"");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_customElement_shadow_attribute(node) {
+	e(node, "invalid_customElement_shadow_attribute", "\"shadow\" must be either \"open\" or \"none\"");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function unknown_svelte_option_attribute(node, name) {
+	e(node, "unknown_svelte_option_attribute", `\`<svelte:options>\` unknown attribute '${name}'`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function illegal_svelte_head_attribute(node) {
+	e(node, "illegal_svelte_head_attribute", "`<svelte:head>` cannot have attributes nor directives");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_fragment_attribute(node) {
+	e(node, "invalid_svelte_fragment_attribute", "`<svelte:fragment>` can only have a slot attribute and (optionally) a let: directive");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_fragment_slot(node) {
+	e(node, "invalid_svelte_fragment_slot", "`<svelte:fragment>` slot attribute must have a static value");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_fragment_placement(node) {
+	e(node, "invalid_svelte_fragment_placement", "`<svelte:fragment>` must be the direct child of a component");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function invalid_svelte_element_placement(node, name) {
+	e(node, "invalid_svelte_element_placement", `<${name}> tags cannot be inside elements or blocks`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function duplicate_svelte_element(node, name) {
+	e(node, "duplicate_svelte_element", `A component can only have one <${name}> element`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_self_placement(node) {
+	e(node, "invalid_self_placement", "`<svelte:self>` components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function missing_svelte_element_definition(node) {
+	e(node, "missing_svelte_element_definition", "`<svelte:element>` must have a 'this' attribute");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function missing_svelte_component_definition(node) {
+	e(node, "missing_svelte_component_definition", "`<svelte:component>` must have a 'this' attribute");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_element_definition(node) {
+	e(node, "invalid_svelte_element_definition", "Invalid element definition — must be an {expression}");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function invalid_svelte_component_definition(node) {
+	e(node, "invalid_svelte_component_definition", "Invalid component definition — must be an {expression}");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} list
+ * @returns {never}
+ */
+export function invalid_svelte_tag(node, list) {
+	e(node, "invalid_svelte_tag", `Valid \`<svelte:...>\` tag names are ${list}`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function conflicting_slot_usage(node) {
+	e(node, "conflicting_slot_usage", "Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migrate towards `{@render ...}` tags completely.");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function illegal_global(node, name) {
+	e(node, "illegal_global", `\`${name}\` is an illegal variable name. To reference a global variable called \`${name}\`, use \`globalThis.${name}\``);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+ * @param {string} name
+ * @returns {never}
+ */
+export function duplicate_declaration(node, name) {
+	e(node, "duplicate_declaration", `\`${name}\` has already been declared`);
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function default_export(node) {
+	e(node, "default_export", "A component cannot have a default export");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function illegal_variable_declaration(node) {
+	e(node, "illegal_variable_declaration", "Cannot declare same variable name which is imported inside `<script context=\"module\">`");
+}
+
+/**
+ * @param {null | number | NodeLike} node
+
+ * @returns {never}
+ */
+export function illegal_store_subscription(node) {
+	e(node, "illegal_store_subscription", "Cannot subscribe to stores that are not declared at the top level of the component");
+}
\ No newline at end of file
diff --git a/packages/svelte/src/compiler/phases/1-parse/index.js b/packages/svelte/src/compiler/phases/1-parse/index.js
index 5c77d36ea6..d5f5cda052 100644
--- a/packages/svelte/src/compiler/phases/1-parse/index.js
+++ b/packages/svelte/src/compiler/phases/1-parse/index.js
@@ -4,7 +4,7 @@ import fragment from './state/fragment.js';
 import { regex_whitespace } from '../patterns.js';
 import { reserved } from './utils/names.js';
 import full_char_code_at from './utils/full_char_code_at.js';
-import { error } from '../../errors.js';
+import * as e from '../../errors.js';
 import { create_fragment } from './utils/create.js';
 import read_options from './read/options.js';
 import { getLocator } from 'locate-character';
@@ -92,15 +92,15 @@ export class Parser {
 
 			if (current.type === 'RegularElement') {
 				current.end = current.start + 1;
-				error(current, 'unclosed-element', current.name);
+				e.unclosed_element(current, current.name);
 			} else {
 				current.end = current.start + 1;
-				error(current, 'unclosed-block');
+				e.unclosed_block(current);
 			}
 		}
 
 		if (state !== fragment) {
-			error(this.index, 'unexpected-eof');
+			e.unexpected_eof(this.index);
 		}
 
 		if (this.root.fragment.nodes.length) {
@@ -158,7 +158,7 @@ export class Parser {
 	 * @returns {never}
 	 */
 	acorn_error(err) {
-		error(err.pos, 'js-parse-error', err.message.replace(regex_position_indicator, ''));
+		e.js_parse_error(err.pos, err.message.replace(regex_position_indicator, ''));
 	}
 
 	/**
@@ -172,11 +172,7 @@ export class Parser {
 		}
 
 		if (required) {
-			if (this.index === this.template.length) {
-				error(this.index, 'unexpected-eof', str);
-			} else {
-				error(this.index, 'expected-token', str);
-			}
+			e.expected_token(this.index, str);
 		}
 
 		return false;
@@ -241,7 +237,7 @@ export class Parser {
 		const identifier = this.template.slice(this.index, (this.index = i));
 
 		if (!allow_reserved && reserved.includes(identifier)) {
-			error(start, 'unexpected-reserved-word', identifier);
+			e.unexpected_reserved_word(start, identifier);
 		}
 
 		return identifier;
@@ -250,7 +246,7 @@ export class Parser {
 	/** @param {RegExp} pattern */
 	read_until(pattern) {
 		if (this.index >= this.template.length) {
-			error(this.template.length, 'unexpected-eof');
+			e.unexpected_eof(this.template.length);
 		}
 
 		const start = this.index;
@@ -267,7 +263,7 @@ export class Parser {
 
 	require_whitespace() {
 		if (!regex_whitespace.test(this.template[this.index])) {
-			error(this.index, 'missing-whitespace');
+			e.missing_whitespace(this.index);
 		}
 
 		this.allow_whitespace();
diff --git a/packages/svelte/src/compiler/phases/1-parse/read/context.js b/packages/svelte/src/compiler/phases/1-parse/read/context.js
index b69c16d320..10cdaa44b7 100644
--- a/packages/svelte/src/compiler/phases/1-parse/read/context.js
+++ b/packages/svelte/src/compiler/phases/1-parse/read/context.js
@@ -9,7 +9,7 @@ import {
 } from '../utils/bracket.js';
 import { parse_expression_at } from '../acorn.js';
 import { regex_not_newline_characters } from '../../patterns.js';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 
 /**
  * @param {import('../index.js').Parser} parser
@@ -36,7 +36,7 @@ export default function read_pattern(parser, optional_allowed = false) {
 	}
 
 	if (!is_bracket_open(code)) {
-		error(i, 'expected-pattern');
+		e.expected_pattern(i);
 	}
 
 	const bracket_stack = [code];
@@ -49,11 +49,7 @@ export default function read_pattern(parser, optional_allowed = false) {
 		} else if (is_bracket_close(code)) {
 			const popped = /** @type {number} */ (bracket_stack.pop());
 			if (!is_bracket_pair(popped, code)) {
-				error(
-					i,
-					'expected-token',
-					String.fromCharCode(/** @type {number} */ (get_bracket_close(popped)))
-				);
+				e.expected_token(i, String.fromCharCode(/** @type {number} */ (get_bracket_close(popped))));
 			}
 			if (bracket_stack.length === 0) {
 				i += code <= 0xffff ? 1 : 2;
diff --git a/packages/svelte/src/compiler/phases/1-parse/read/expression.js b/packages/svelte/src/compiler/phases/1-parse/read/expression.js
index 21d4bb96fe..506fc354fb 100644
--- a/packages/svelte/src/compiler/phases/1-parse/read/expression.js
+++ b/packages/svelte/src/compiler/phases/1-parse/read/expression.js
@@ -1,6 +1,6 @@
 import { parse_expression_at } from '../acorn.js';
 import { regex_whitespace } from '../../patterns.js';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 
 /**
  * @param {import('../index.js').Parser} parser
@@ -23,7 +23,7 @@ export default function read_expression(parser) {
 			if (char === ')') {
 				num_parens -= 1;
 			} else if (!regex_whitespace.test(char)) {
-				error(index, 'expected-token', ')');
+				e.expected_token(index, ')');
 			}
 
 			index += 1;
diff --git a/packages/svelte/src/compiler/phases/1-parse/read/options.js b/packages/svelte/src/compiler/phases/1-parse/read/options.js
index c9262c54a8..18264ae9bc 100644
--- a/packages/svelte/src/compiler/phases/1-parse/read/options.js
+++ b/packages/svelte/src/compiler/phases/1-parse/read/options.js
@@ -1,5 +1,5 @@
 import { namespace_svg } from '../../../../constants.js';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 
 const regex_valid_tag_name = /^[a-zA-Z][a-zA-Z0-9]*-[a-zA-Z0-9-]+$/;
 
@@ -22,24 +22,18 @@ export default function read_options(node) {
 
 	for (const attribute of node.attributes) {
 		if (attribute.type !== 'Attribute') {
-			error(attribute, 'invalid-svelte-option-attribute');
+			e.invalid_svelte_option_attribute(attribute);
 		}
 
 		const { name } = attribute;
 
 		switch (name) {
 			case 'runes': {
-				const value = get_static_value(attribute, () =>
-					error(attribute, 'invalid-svelte-option-runes')
-				);
-				if (typeof value !== 'boolean') {
-					error(attribute, 'invalid-svelte-option-runes');
-				}
-				component_options.runes = value;
+				component_options.runes = get_boolean_value(attribute, e.invalid_svelte_option_runes);
 				break;
 			}
 			case 'tag': {
-				error(attribute, 'tag-option-deprecated');
+				e.tag_option_deprecated(attribute);
 				break; // eslint doesn't know this is unnecessary
 			}
 			case 'customElement': {
@@ -48,9 +42,9 @@ export default function read_options(node) {
 
 				const { value } = attribute;
 				if (value === true) {
-					error(attribute, 'invalid-svelte-option-customElement');
+					e.invalid_svelte_option_customElement(attribute);
 				} else if (value[0].type === 'Text') {
-					const tag = get_static_value(attribute, () => error(attribute, 'invalid-tag-property'));
+					const tag = get_static_value(attribute, () => e.invalid_tag_property(attribute));
 					validate_tag(attribute, tag);
 					ce.tag = tag;
 					component_options.customElement = ce;
@@ -61,7 +55,7 @@ export default function read_options(node) {
 					if (value[0].expression.type === 'Literal' && value[0].expression.value === null) {
 						break;
 					}
-					error(attribute, 'invalid-svelte-option-customElement');
+					e.invalid_svelte_option_customElement(attribute);
 				}
 
 				/** @type {Array<[string, any]>} */
@@ -72,7 +66,7 @@ export default function read_options(node) {
 						property.computed ||
 						property.key.type !== 'Identifier'
 					) {
-						error(attribute, 'invalid-svelte-option-customElement');
+						e.invalid_svelte_option_customElement(attribute);
 					}
 					properties.push([property.key.name, property.value]);
 				}
@@ -83,13 +77,13 @@ export default function read_options(node) {
 					validate_tag(tag, tag_value);
 					ce.tag = tag_value;
 				} else {
-					error(attribute, 'invalid-svelte-option-customElement');
+					e.invalid_svelte_option_customElement(attribute);
 				}
 
 				const props = properties.find(([name]) => name === 'props')?.[1];
 				if (props) {
 					if (props.type !== 'ObjectExpression') {
-						error(attribute, 'invalid-customElement-props-attribute');
+						e.invalid_customElement_props_attribute(attribute);
 					}
 					ce.props = {};
 					for (const property of /** @type {import('estree').ObjectExpression} */ (props)
@@ -100,7 +94,7 @@ export default function read_options(node) {
 							property.key.type !== 'Identifier' ||
 							property.value.type !== 'ObjectExpression'
 						) {
-							error(attribute, 'invalid-customElement-props-attribute');
+							e.invalid_customElement_props_attribute(attribute);
 						}
 						ce.props[property.key.name] = {};
 						for (const prop of property.value.properties) {
@@ -110,7 +104,7 @@ export default function read_options(node) {
 								prop.key.type !== 'Identifier' ||
 								prop.value.type !== 'Literal'
 							) {
-								error(attribute, 'invalid-customElement-props-attribute');
+								e.invalid_customElement_props_attribute(attribute);
 							}
 
 							if (prop.key.name === 'type') {
@@ -119,21 +113,21 @@ export default function read_options(node) {
 										/** @type {string} */ (prop.value.value)
 									) === -1
 								) {
-									error(attribute, 'invalid-customElement-props-attribute');
+									e.invalid_customElement_props_attribute(attribute);
 								}
 								ce.props[property.key.name].type = /** @type {any} */ (prop.value.value);
 							} else if (prop.key.name === 'reflect') {
 								if (typeof prop.value.value !== 'boolean') {
-									error(attribute, 'invalid-customElement-props-attribute');
+									e.invalid_customElement_props_attribute(attribute);
 								}
 								ce.props[property.key.name].reflect = prop.value.value;
 							} else if (prop.key.name === 'attribute') {
 								if (typeof prop.value.value !== 'string') {
-									error(attribute, 'invalid-customElement-props-attribute');
+									e.invalid_customElement_props_attribute(attribute);
 								}
 								ce.props[property.key.name].attribute = prop.value.value;
 							} else {
-								error(attribute, 'invalid-customElement-props-attribute');
+								e.invalid_customElement_props_attribute(attribute);
 							}
 						}
 					}
@@ -143,7 +137,7 @@ export default function read_options(node) {
 				if (shadow) {
 					const shadowdom = shadow?.value;
 					if (shadowdom !== 'open' && shadowdom !== 'none') {
-						error(shadow, 'invalid-customElement-shadow-attribute');
+						e.invalid_customElement_shadow_attribute(shadow);
 					}
 					ce.shadow = shadowdom;
 				}
@@ -158,10 +152,10 @@ export default function read_options(node) {
 			}
 			case 'namespace': {
 				const value = get_static_value(attribute, () =>
-					error(attribute, 'invalid-svelte-option-namespace')
+					e.invalid_svelte_option_namespace(attribute)
 				);
 				if (typeof value !== 'string') {
-					error(attribute, 'invalid-svelte-option-namespace');
+					e.invalid_svelte_option_namespace(attribute);
 				}
 
 				if (value === namespace_svg) {
@@ -169,43 +163,34 @@ export default function read_options(node) {
 				} else if (value === 'html' || value === 'svg' || value === 'foreign') {
 					component_options.namespace = value;
 				} else {
-					error(attribute, 'invalid-svelte-option-namespace');
+					e.invalid_svelte_option_namespace(attribute);
 				}
 
 				break;
 			}
 			case 'immutable': {
-				const value = get_static_value(attribute, () =>
-					error(attribute, 'invalid-svelte-option-immutable')
+				component_options.immutable = get_boolean_value(
+					attribute,
+					e.invalid_svelte_option_immutable
 				);
-				if (typeof value !== 'boolean') {
-					error(attribute, 'invalid-svelte-option-immutable');
-				}
-				component_options.immutable = value;
 				break;
 			}
 			case 'preserveWhitespace': {
-				const value = get_static_value(attribute, () =>
-					error(attribute, 'invalid-svelte-option-preserveWhitespace')
+				component_options.preserveWhitespace = get_boolean_value(
+					attribute,
+					e.invalid_svelte_option_preserveWhitespace
 				);
-				if (typeof value !== 'boolean') {
-					error(attribute, 'invalid-svelte-option-preserveWhitespace');
-				}
-				component_options.preserveWhitespace = value;
 				break;
 			}
 			case 'accessors': {
-				const value = get_static_value(attribute, () =>
-					error(attribute, 'invalid-svelte-option-accessors')
+				component_options.accessors = get_boolean_value(
+					attribute,
+					e.invalid_svelte_option_accessors
 				);
-				if (typeof value !== 'boolean') {
-					error(attribute, 'invalid-svelte-option-accessors');
-				}
-				component_options.accessors = value;
 				break;
 			}
 			default:
-				error(attribute, 'unknown-svelte-option-attribute', name);
+				e.unknown_svelte_option_attribute(attribute, name);
 		}
 	}
 
@@ -230,6 +215,18 @@ function get_static_value(attribute, error) {
 	return chunk.expression.value;
 }
 
+/**
+ * @param {any} attribute
+ * @param {(attribute: any) => never} error
+ */
+function get_boolean_value(attribute, error) {
+	const value = get_static_value(attribute, () => error(attribute));
+	if (typeof value !== 'boolean') {
+		error(attribute);
+	}
+	return value;
+}
+
 /**
  * @param {any} attribute
  * @param {string} tag
@@ -237,10 +234,10 @@ function get_static_value(attribute, error) {
  */
 function validate_tag(attribute, tag) {
 	if (typeof tag !== 'string' && tag !== null) {
-		error(attribute, 'invalid-tag-property');
+		e.invalid_tag_property(attribute);
 	}
 	if (tag && !regex_valid_tag_name.test(tag)) {
-		error(attribute, 'invalid-tag-property');
+		e.invalid_tag_property(attribute);
 	}
 	// TODO do we still need this?
 	// if (tag && !component.compile_options.customElement) {
diff --git a/packages/svelte/src/compiler/phases/1-parse/read/script.js b/packages/svelte/src/compiler/phases/1-parse/read/script.js
index cd9129e8b5..172e1dddf1 100644
--- a/packages/svelte/src/compiler/phases/1-parse/read/script.js
+++ b/packages/svelte/src/compiler/phases/1-parse/read/script.js
@@ -1,6 +1,6 @@
 import * as acorn from '../acorn.js';
 import { regex_not_newline_characters } from '../../patterns.js';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 
 const regex_closing_script_tag = /<\/script\s*>/;
 const regex_starts_with_closing_script_tag = /^<\/script\s*>/;
@@ -16,13 +16,13 @@ function get_context(attributes) {
 	if (!context) return 'default';
 
 	if (context.value.length !== 1 || context.value[0].type !== 'Text') {
-		error(context.start, 'invalid-script-context');
+		e.invalid_script_context(context.start);
 	}
 
 	const value = context.value[0].data;
 
 	if (value !== 'module') {
-		error(context.start, 'invalid-script-context');
+		e.invalid_script_context(context.start);
 	}
 
 	return value;
@@ -38,7 +38,7 @@ export function read_script(parser, start, attributes) {
 	const script_start = parser.index;
 	const data = parser.read_until(regex_closing_script_tag);
 	if (parser.index >= parser.template.length) {
-		error(parser.template.length, 'unclosed-element', 'script');
+		e.unclosed_element(parser.template.length, 'script');
 	}
 
 	const source =
diff --git a/packages/svelte/src/compiler/phases/1-parse/read/style.js b/packages/svelte/src/compiler/phases/1-parse/read/style.js
index 8ec00daff1..de5a457889 100644
--- a/packages/svelte/src/compiler/phases/1-parse/read/style.js
+++ b/packages/svelte/src/compiler/phases/1-parse/read/style.js
@@ -1,4 +1,4 @@
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 
 const REGEX_MATCHER = /^[~^$*|]?=/;
 const REGEX_CLOSING_BRACKET = /[\s\]]/;
@@ -64,7 +64,7 @@ function read_body(parser, close) {
 		}
 	}
 
-	error(parser.template.length, 'expected-token', close);
+	e.expected_token(parser.template.length, close);
 }
 
 /**
@@ -154,7 +154,7 @@ function read_selector_list(parser, inside_pseudo_class = false) {
 		}
 	}
 
-	error(parser.template.length, 'unexpected-eof');
+	e.unexpected_eof(parser.template.length);
 }
 
 /**
@@ -352,7 +352,7 @@ function read_selector(parser, inside_pseudo_class = false) {
 		if (combinator) {
 			if (relative_selector.selectors.length === 0) {
 				if (!inside_pseudo_class) {
-					error(start, 'invalid-css-selector');
+					e.invalid_css_selector(start);
 				}
 			} else {
 				relative_selector.end = index;
@@ -365,12 +365,12 @@ function read_selector(parser, inside_pseudo_class = false) {
 			parser.allow_whitespace();
 
 			if (parser.match(',') || (inside_pseudo_class ? parser.match(')') : parser.match('{'))) {
-				error(parser.index, 'invalid-css-selector');
+				e.invalid_css_selector(parser.index);
 			}
 		}
 	}
 
-	error(parser.template.length, 'unexpected-eof');
+	e.unexpected_eof(parser.template.length);
 }
 
 /**
@@ -476,7 +476,7 @@ function read_declaration(parser) {
 	const value = read_value(parser);
 
 	if (!value && !property.startsWith('--')) {
-		error(parser.index, 'invalid-css-declaration');
+		e.invalid_css_declaration(parser.index);
 	}
 
 	const end = parser.index;
@@ -531,7 +531,7 @@ function read_value(parser) {
 		parser.index++;
 	}
 
-	error(parser.template.length, 'unexpected-eof');
+	e.unexpected_eof(parser.template.length);
 }
 
 /**
@@ -564,7 +564,7 @@ function read_attribute_value(parser) {
 		parser.index++;
 	}
 
-	error(parser.template.length, 'unexpected-eof');
+	e.unexpected_eof(parser.template.length);
 }
 
 /**
@@ -577,7 +577,7 @@ function read_identifier(parser) {
 	let identifier = '';
 
 	if (parser.match('--') || parser.match_regex(REGEX_LEADING_HYPHEN_OR_DIGIT)) {
-		error(start, 'invalid-css-identifier');
+		e.invalid_css_identifier(start);
 	}
 
 	let escaped = false;
@@ -602,7 +602,7 @@ function read_identifier(parser) {
 	}
 
 	if (identifier === '') {
-		error(start, 'invalid-css-identifier');
+		e.invalid_css_identifier(start);
 	}
 
 	return identifier;
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/element.js b/packages/svelte/src/compiler/phases/1-parse/state/element.js
index bfaee9572d..134f322967 100644
--- a/packages/svelte/src/compiler/phases/1-parse/state/element.js
+++ b/packages/svelte/src/compiler/phases/1-parse/state/element.js
@@ -5,7 +5,7 @@ import read_expression from '../read/expression.js';
 import { read_script } from '../read/script.js';
 import read_style from '../read/style.js';
 import { closing_tag_omitted, decode_character_references } from '../utils/html.js';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 import { create_fragment } from '../utils/create.js';
 import { create_attribute } from '../../nodes.js';
 
@@ -104,19 +104,18 @@ export default function tag(parser) {
 				['svelte:options', 'svelte:window', 'svelte:body', 'svelte:document'].includes(name) &&
 				/** @type {import('#compiler').ElementLike} */ (parent).fragment.nodes.length
 			) {
-				error(
+				e.invalid_element_content(
 					/** @type {import('#compiler').ElementLike} */ (parent).fragment.nodes[0].start,
-					'invalid-element-content',
 					name
 				);
 			}
 		} else {
 			if (name in parser.meta_tags) {
-				error(start, 'duplicate-svelte-element', name);
+				e.duplicate_svelte_element(start, name);
 			}
 
 			if (parent.type !== 'Root') {
-				error(start, 'invalid-svelte-element-placement', name);
+				e.invalid_svelte_element_placement(start, name);
 			}
 
 			parser.meta_tags[name] = true;
@@ -168,7 +167,7 @@ export default function tag(parser) {
 
 	if (is_closing_tag) {
 		if (is_void(name)) {
-			error(start, 'invalid-void-content');
+			e.invalid_void_content(start);
 		}
 
 		parser.eat('>', true);
@@ -177,14 +176,9 @@ export default function tag(parser) {
 		while (/** @type {import('#compiler').RegularElement} */ (parent).name !== name) {
 			if (parent.type !== 'RegularElement') {
 				if (parser.last_auto_closed_tag && parser.last_auto_closed_tag.tag === name) {
-					error(
-						start,
-						'invalid-closing-tag-after-autoclose',
-						name,
-						parser.last_auto_closed_tag.reason
-					);
+					e.invalid_closing_tag_after_autoclose(start, name, parser.last_auto_closed_tag.reason);
 				} else {
-					error(start, 'invalid-closing-tag', name);
+					e.invalid_closing_tag(start, name);
 				}
 			}
 
@@ -225,7 +219,7 @@ export default function tag(parser) {
 	while ((attribute = read(parser))) {
 		if (attribute.type === 'Attribute' || attribute.type === 'BindDirective') {
 			if (unique_names.includes(attribute.name)) {
-				error(attribute.start, 'duplicate-attribute');
+				e.duplicate_attribute(attribute.start);
 				// <svelte:element bind:this this=..> is allowed
 			} else if (attribute.name !== 'this') {
 				unique_names.push(attribute.name);
@@ -242,7 +236,7 @@ export default function tag(parser) {
 			(attr) => attr.type === 'Attribute' && attr.name === 'this'
 		);
 		if (index === -1) {
-			error(start, 'missing-svelte-component-definition');
+			e.missing_svelte_component_definition(start);
 		}
 
 		const definition = /** @type {import('#compiler').Attribute} */ (
@@ -253,7 +247,7 @@ export default function tag(parser) {
 			definition.value.length !== 1 ||
 			definition.value[0].type === 'Text'
 		) {
-			error(definition.start, 'invalid-svelte-component-definition');
+			e.invalid_svelte_component_definition(definition.start);
 		}
 
 		element.expression = definition.value[0].expression;
@@ -265,14 +259,14 @@ export default function tag(parser) {
 			(attr) => attr.type === 'Attribute' && attr.name === 'this'
 		);
 		if (index === -1) {
-			error(start, 'missing-svelte-element-definition');
+			e.missing_svelte_element_definition(start);
 		}
 
 		const definition = /** @type {import('#compiler').Attribute} */ (
 			element.attributes.splice(index, 1)[0]
 		);
 		if (definition.value === true || definition.value.length !== 1) {
-			error(definition.start, 'invalid-svelte-element-definition');
+			e.invalid_svelte_element_definition(definition.start);
 		}
 		const chunk = definition.value[0];
 		element.tag =
@@ -311,17 +305,17 @@ export default function tag(parser) {
 			}
 
 			if (content.context === 'module') {
-				if (current.module) error(start, 'duplicate-script-element');
+				if (current.module) e.duplicate_script_element(start);
 				current.module = content;
 			} else {
-				if (current.instance) error(start, 'duplicate-script-element');
+				if (current.instance) e.duplicate_script_element(start);
 				current.instance = content;
 			}
 		} else {
 			const content = read_style(parser, start, element.attributes);
 			content.content.comment = prev_comment;
 
-			if (current.css) error(start, 'duplicate-style-element');
+			if (current.css) e.duplicate_style_element(start);
 			current.css = content;
 		}
 		return;
@@ -396,7 +390,7 @@ function read_tag_name(parser) {
 		}
 
 		if (!legal) {
-			error(start, 'invalid-self-placement');
+			e.invalid_self_placement(start);
 		}
 
 		return 'svelte:self';
@@ -412,12 +406,12 @@ function read_tag_name(parser) {
 	if (meta_tags.has(name)) return name;
 
 	if (name.startsWith('svelte:')) {
-		const match = fuzzymatch(name.slice(7), valid_meta_tags);
-		error(start, 'invalid-svelte-tag', valid_meta_tags, match);
+		const list = `${valid_meta_tags.slice(0, -1).join(', ')} or ${valid_meta_tags[valid_meta_tags.length - 1]}`;
+		e.invalid_svelte_tag(start, list);
 	}
 
 	if (!valid_tag_name.test(name)) {
-		error(start, 'invalid-tag-name');
+		e.invalid_tag_name(start);
 	}
 
 	return name;
@@ -445,7 +439,7 @@ function read_static_attribute(parser) {
 		parser.allow_whitespace();
 		let raw = parser.match_regex(regex_attribute_value);
 		if (!raw) {
-			error(parser.index, 'missing-attribute-value');
+			e.missing_attribute_value(parser.index);
 		}
 
 		parser.index += raw.length;
@@ -468,7 +462,7 @@ function read_static_attribute(parser) {
 	}
 
 	if (parser.match_regex(regex_starts_with_quote_characters)) {
-		error(parser.index, 'expected-token', '=');
+		e.expected_token(parser.index, '=');
 	}
 
 	return create_attribute(name, start, parser.index, value);
@@ -509,7 +503,7 @@ function read_attribute(parser) {
 			const name = parser.read_identifier();
 
 			if (name === null) {
-				error(start, 'empty-attribute-shorthand');
+				e.empty_attribute_shorthand(start);
 			}
 
 			parser.allow_whitespace();
@@ -554,14 +548,14 @@ function read_attribute(parser) {
 		value = read_attribute_value(parser);
 		end = parser.index;
 	} else if (parser.match_regex(regex_starts_with_quote_characters)) {
-		error(parser.index, 'expected-token', '=');
+		e.expected_token(parser.index, '=');
 	}
 
 	if (type) {
 		const [directive_name, ...modifiers] = name.slice(colon_index + 1).split('|');
 
 		if (directive_name === '') {
-			error(start + colon_index + 1, 'empty-directive-name', type);
+			e.empty_directive_name(start + colon_index + 1, type);
 		}
 
 		if (type === 'StyleDirective') {
@@ -586,7 +580,7 @@ function read_attribute(parser) {
 			const attribute_contains_text =
 				/** @type {any[]} */ (value).length > 1 || first_value.type === 'Text';
 			if (attribute_contains_text) {
-				error(/** @type {number} */ (first_value.start), 'invalid-directive-value');
+				e.invalid_directive_value(/** @type {number} */ (first_value.start));
 			} else {
 				expression = first_value.expression;
 			}
@@ -679,22 +673,22 @@ function read_attribute_value(parser) {
 			},
 			'in attribute value'
 		);
-	} catch (/** @type {any} e */ e) {
-		if (e.code === 'js-parse-error') {
+	} catch (/** @type {any} */ error) {
+		if (error.code === 'js_parse_error') {
 			// if the attribute value didn't close + self-closing tag
 			// eg: `<Component test={{a:1} />`
 			// acorn may throw a `Unterminated regular expression` because of `/>`
-			const pos = e.position?.[0];
+			const pos = error.position?.[0];
 			if (pos !== undefined && parser.template.slice(pos - 1, pos + 1) === '/>') {
 				parser.index = pos;
-				error(pos, 'unclosed-attribute-value', quote_mark || '}');
+				e.unclosed_attribute_value(pos, quote_mark || '}');
 			}
 		}
-		throw e;
+		throw error;
 	}
 
 	if (value.length === 0 && !quote_mark) {
-		error(parser.index, 'missing-attribute-value');
+		e.missing_attribute_value(parser.index);
 	}
 
 	if (quote_mark) parser.index += 1;
@@ -741,12 +735,12 @@ function read_sequence(parser, done, location) {
 				const index = parser.index - 1;
 				parser.eat('#');
 				const name = parser.read_until(/[^a-z]/);
-				error(index, 'invalid-block-placement', location, name);
+				e.invalid_block_placement(index, name, location);
 			} else if (parser.match('@')) {
 				const index = parser.index - 1;
 				parser.eat('@');
 				const name = parser.read_until(/[^a-z]/);
-				error(index, 'invalid-tag-placement', location, name);
+				e.invalid_tag_placement(index, name, location);
 			}
 
 			flush(parser.index - 1);
@@ -784,5 +778,5 @@ function read_sequence(parser, done, location) {
 		}
 	}
 
-	error(parser.template.length, 'unexpected-eof');
+	e.unexpected_eof(parser.template.length);
 }
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/tag.js b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
index 1c73427463..537e0b6b34 100644
--- a/packages/svelte/src/compiler/phases/1-parse/state/tag.js
+++ b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
@@ -1,6 +1,6 @@
 import read_pattern from '../read/context.js';
 import read_expression from '../read/expression.js';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 import { create_fragment } from '../utils/create.js';
 import { walk } from 'zimmerframe';
 
@@ -147,7 +147,7 @@ function open(parser) {
 			parser.allow_whitespace();
 			index = parser.read_identifier();
 			if (!index) {
-				error(parser.index, 'expected-identifier');
+				e.expected_identifier(parser.index);
 			}
 
 			parser.allow_whitespace();
@@ -265,7 +265,7 @@ function open(parser) {
 		const name_end = parser.index;
 
 		if (name === null) {
-			error(parser.index, 'expected-identifier');
+			e.expected_identifier(parser.index);
 		}
 
 		parser.eat('(', true);
@@ -320,7 +320,7 @@ function open(parser) {
 		return;
 	}
 
-	error(parser.index, 'expected-block-type');
+	e.expected_block_type(parser.index);
 }
 
 /** @param {import('../index.js').Parser} parser */
@@ -330,8 +330,8 @@ function next(parser) {
 	const block = parser.current(); // TODO type should not be TemplateNode, that's much too broad
 
 	if (block.type === 'IfBlock') {
-		if (!parser.eat('else')) error(start, 'expected-token', '{:else} or {:else if}');
-		if (parser.eat('if')) error(start, 'invalid-elseif');
+		if (!parser.eat('else')) e.expected_token(start, '{:else} or {:else if}');
+		if (parser.eat('if')) e.invalid_elseif(start);
 
 		parser.allow_whitespace();
 
@@ -373,7 +373,7 @@ function next(parser) {
 	}
 
 	if (block.type === 'EachBlock') {
-		if (!parser.eat('else')) error(start, 'expected-token', '{:else}');
+		if (!parser.eat('else')) e.expected_token(start, '{:else}');
 
 		parser.allow_whitespace();
 		parser.eat('}', true);
@@ -389,7 +389,7 @@ function next(parser) {
 	if (block.type === 'AwaitBlock') {
 		if (parser.eat('then')) {
 			if (block.then) {
-				error(start, 'duplicate-block-part', '{:then}');
+				e.duplicate_block_part(start, '{:then}');
 			}
 
 			if (!parser.eat('}')) {
@@ -408,7 +408,7 @@ function next(parser) {
 
 		if (parser.eat('catch')) {
 			if (block.catch) {
-				error(start, 'duplicate-block-part', '{:catch}');
+				e.duplicate_block_part(start, '{:catch}');
 			}
 
 			if (!parser.eat('}')) {
@@ -425,10 +425,10 @@ function next(parser) {
 			return;
 		}
 
-		error(start, 'expected-token', '{:then ...} or {:catch ...}');
+		e.expected_token(start, '{:then ...} or {:catch ...}');
 	}
 
-	error(start, 'invalid-continuing-block-placement');
+	e.invalid_continuing_block_placement(start);
 }
 
 /** @param {import('../index.js').Parser} parser */
@@ -466,11 +466,11 @@ function close(parser) {
 
 		case 'RegularElement':
 			// TODO handle implicitly closed elements
-			error(start, 'unexpected-block-close');
+			e.unexpected_block_close(start);
 			break;
 
 		default:
-			error(start, 'unexpected-block-close');
+			e.unexpected_block_close(start);
 	}
 
 	parser.allow_whitespace();
@@ -522,7 +522,7 @@ function special(parser) {
 			identifiers.forEach(
 				/** @param {any} node */ (node) => {
 					if (node.type !== 'Identifier') {
-						error(/** @type {number} */ (node.start), 'invalid-debug');
+						e.invalid_debug(/** @type {number} */ (node.start));
 					}
 				}
 			);
@@ -583,7 +583,7 @@ function special(parser) {
 				expression.expression.type !== 'CallExpression' ||
 				!expression.expression.optional)
 		) {
-			error(expression, 'invalid-render-expression');
+			e.invalid_render_expression(expression);
 		}
 
 		parser.allow_whitespace();
diff --git a/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js b/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js
index 38a62b9ca7..6f933ab55a 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/css/css-analyze.js
@@ -1,5 +1,5 @@
 import { walk } from 'zimmerframe';
-import { error } from '../../../errors.js';
+import * as e from '../../../errors.js';
 import { is_keyframes_node } from '../../css.js';
 import { merge } from '../../visitors.js';
 
@@ -98,31 +98,26 @@ const validation_visitors = {
 	Rule(node, context) {
 		if (node.metadata.is_global_block) {
 			if (node.prelude.children.length > 1) {
-				error(node.prelude, 'invalid-css-global-block-list');
+				e.invalid_css_global_block_list(node.prelude);
 			}
 
 			const complex_selector = node.prelude.children[0];
 			const relative_selector = complex_selector.children[complex_selector.children.length - 1];
 
 			if (relative_selector.selectors.length > 1) {
-				error(
-					relative_selector.selectors[relative_selector.selectors.length - 1],
-					'invalid-css-global-block-modifier'
+				e.invalid_css_global_block_modifier(
+					relative_selector.selectors[relative_selector.selectors.length - 1]
 				);
 			}
 
 			if (relative_selector.combinator && relative_selector.combinator.name !== ' ') {
-				error(
-					relative_selector,
-					'invalid-css-global-block-combinator',
-					relative_selector.combinator.name
-				);
+				e.invalid_css_global_block_combinator(relative_selector, relative_selector.combinator.name);
 			}
 
 			const declaration = node.block.children.find((child) => child.type === 'Declaration');
 
 			if (declaration) {
-				error(declaration, 'invalid-css-global-block-declaration');
+				e.invalid_css_global_block_declaration(declaration);
 			}
 		}
 
@@ -137,7 +132,7 @@ const validation_visitors = {
 			if (a !== b) {
 				for (let i = a; i <= b; i += 1) {
 					if (is_global(node.children[i])) {
-						error(node.children[i].selectors[0], 'invalid-css-global-placement');
+						e.invalid_css_global_placement(node.children[i].selectors[0]);
 					}
 				}
 			}
@@ -152,12 +147,12 @@ const validation_visitors = {
 					const child = selector.args?.children[0].children[0];
 					// ensure `:global(element)` to be at the first position in a compound selector
 					if (child?.selectors[0].type === 'TypeSelector' && i !== 0) {
-						error(selector, 'invalid-css-global-selector-list');
+						e.invalid_css_global_selector_list(selector);
 					}
 
 					// ensure `:global(.class)` is not followed by a type selector, eg: `:global(.class)element`
 					if (relative_selector.selectors[i + 1]?.type === 'TypeSelector') {
-						error(relative_selector.selectors[i + 1], 'invalid-css-type-selector-placement');
+						e.invalid_css_type_selector_placement(relative_selector.selectors[i + 1]);
 					}
 
 					// ensure `:global(...)`contains a single selector
@@ -167,7 +162,7 @@ const validation_visitors = {
 						selector.args.children.length > 1 &&
 						(node.children.length > 1 || relative_selector.selectors.length > 1)
 					) {
-						error(selector, 'invalid-css-global-selector');
+						e.invalid_css_global_selector(selector);
 					}
 				}
 			}
@@ -176,7 +171,7 @@ const validation_visitors = {
 	NestingSelector(node, context) {
 		const rule = /** @type {import('#compiler').Css.Rule} */ (context.state.rule);
 		if (!rule.metadata.parent_rule) {
-			error(node, 'invalid-nesting-selector');
+			e.invalid_nesting_selector(node);
 		}
 	}
 };
diff --git a/packages/svelte/src/compiler/phases/2-analyze/index.js b/packages/svelte/src/compiler/phases/2-analyze/index.js
index 37eb3a3c92..10091a7105 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/index.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/index.js
@@ -1,6 +1,6 @@
 import is_reference from 'is-reference';
 import { walk } from 'zimmerframe';
-import { error } from '../../errors.js';
+import * as e from '../../errors.js';
 import {
 	extract_identifiers,
 	extract_all_identifiers_from_expression,
@@ -229,7 +229,7 @@ export function analyze_module(ast, options) {
 	for (const [name, references] of scope.references) {
 		if (name[0] !== '$' || ReservedKeywords.includes(name)) continue;
 		if (name === '$' || name[1] === '$') {
-			error(references[0].node, 'illegal-global', name);
+			e.illegal_global(references[0].node, name);
 		}
 	}
 
@@ -281,7 +281,7 @@ export function analyze_component(root, source, options) {
 	for (const [name, references] of module.scope.references) {
 		if (name[0] !== '$' || ReservedKeywords.includes(name)) continue;
 		if (name === '$' || name[1] === '$') {
-			error(references[0].node, 'illegal-global', name);
+			e.illegal_global(references[0].node, name);
 		}
 
 		const store_name = name.slice(1);
@@ -321,12 +321,12 @@ export function analyze_component(root, source, options) {
 			}
 
 			if (is_nested_store_subscription_node) {
-				error(is_nested_store_subscription_node, 'illegal-store-subscription');
+				e.illegal_store_subscription(is_nested_store_subscription_node);
 			}
 
 			if (options.runes !== false) {
 				if (declaration === null && /[a-z]/.test(store_name[0])) {
-					error(references[0].node, 'illegal-global', name);
+					e.illegal_global(references[0].node, name);
 				} else if (declaration !== null && Runes.includes(/** @type {any} */ (name))) {
 					for (const { node, path } of references) {
 						if (path.at(-1)?.type === 'CallExpression') {
@@ -345,7 +345,7 @@ export function analyze_component(root, source, options) {
 						// const state = $state(0) is valid
 						get_rune(/** @type {import('estree').Node} */ (path.at(-1)), module.scope) === null
 					) {
-						error(node, 'illegal-subscription');
+						e.illegal_subscription(node);
 					}
 				}
 			}
@@ -413,12 +413,12 @@ export function analyze_component(root, source, options) {
 	if (analysis.runes) {
 		const props_refs = module.scope.references.get('$$props');
 		if (props_refs) {
-			error(props_refs[0].node, 'invalid-legacy-props');
+			e.invalid_legacy_props(props_refs[0].node);
 		}
 
 		const rest_props_refs = module.scope.references.get('$$restProps');
 		if (rest_props_refs) {
-			error(rest_props_refs[0].node, 'invalid-legacy-rest-props');
+			e.invalid_legacy_rest_props(rest_props_refs[0].node);
 		}
 
 		for (const { ast, scope, scopes } of [module, instance, template]) {
@@ -451,7 +451,7 @@ export function analyze_component(root, source, options) {
 							({ alias, name }) => (binding.prop_alias ?? binding.node.name) === (alias ?? name)
 						)
 					) {
-						error(binding.node, 'conflicting-property-name');
+						e.conflicting_property_name(binding.node);
 					}
 				}
 			}
@@ -504,7 +504,7 @@ export function analyze_component(root, source, options) {
 	}
 
 	if (analysis.uses_render_tags && (analysis.uses_slots || analysis.slot_names.size > 0)) {
-		error(analysis.slot_names.values().next().value, 'conflicting-slot-usage');
+		e.conflicting_slot_usage(analysis.slot_names.values().next().value);
 	}
 
 	// warn on any nonstate declarations that are a) reassigned and b) referenced in the template
@@ -1425,7 +1425,7 @@ function order_reactive_statements(unsorted_reactive_declarations) {
 	const cycle = check_graph_for_cycles(edges);
 	if (cycle?.length) {
 		const declaration = /** @type {Tuple[]} */ (lookup.get(cycle[0]))[0];
-		error(declaration[0], 'cyclical-reactive-declaration', cycle);
+		e.cyclical_reactive_declaration(declaration[0], cycle.join(' → '));
 	}
 
 	// We use a map and take advantage of the fact that the spec says insertion order is preserved when iterating
diff --git a/packages/svelte/src/compiler/phases/2-analyze/validation.js b/packages/svelte/src/compiler/phases/2-analyze/validation.js
index 0f6f1bf6dd..cd1aed4b2d 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/validation.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/validation.js
@@ -3,7 +3,7 @@ import {
 	interactive_elements,
 	is_tag_valid_with_parent
 } from '../../../constants.js';
-import { error } from '../../errors.js';
+import * as e from '../../errors.js';
 import {
 	extract_identifiers,
 	get_parent,
@@ -44,14 +44,14 @@ function validate_component(node, context) {
 			attribute.type !== 'OnDirective' &&
 			attribute.type !== 'BindDirective'
 		) {
-			error(attribute, 'invalid-component-directive');
+			e.invalid_component_directive(attribute);
 		}
 
 		if (
 			attribute.type === 'OnDirective' &&
 			(attribute.modifiers.length > 1 || attribute.modifiers.some((m) => m !== 'once'))
 		) {
-			error(attribute, 'invalid-event-modifier');
+			e.invalid_component_event_modifier(attribute);
 		}
 
 		if (attribute.type === 'Attribute') {
@@ -62,7 +62,7 @@ function validate_component(node, context) {
 					while (--i > 0) {
 						const char = context.state.analysis.source[i];
 						if (char === '(') break; // parenthesized sequence expressions are ok
-						if (char === '{') error(expression, 'invalid-sequence-expression');
+						if (char === '{') e.invalid_sequence_expression(expression);
 					}
 				}
 			}
@@ -93,8 +93,12 @@ const react_attributes = new Map([
  */
 function validate_element(node, context) {
 	let has_animate_directive = false;
-	let has_in_transition = false;
-	let has_out_transition = false;
+
+	/** @type {import('#compiler').TransitionDirective | null} */
+	let in_transition = null;
+
+	/** @type {import('#compiler').TransitionDirective | null} */
+	let out_transition = null;
 
 	for (const attribute of node.attributes) {
 		if (attribute.type === 'Attribute') {
@@ -107,18 +111,18 @@ function validate_element(node, context) {
 					while (--i > 0) {
 						const char = context.state.analysis.source[i];
 						if (char === '(') break; // parenthesized sequence expressions are ok
-						if (char === '{') error(expression, 'invalid-sequence-expression');
+						if (char === '{') e.invalid_sequence_expression(expression);
 					}
 				}
 			}
 
 			if (regex_illegal_attribute_character.test(attribute.name)) {
-				error(attribute, 'invalid-attribute-name', attribute.name);
+				e.invalid_attribute_name(attribute, attribute.name);
 			}
 
 			if (attribute.name.startsWith('on') && attribute.name.length > 2) {
 				if (!is_expression) {
-					error(attribute, 'invalid-event-attribute-value');
+					e.invalid_event_attribute_value(attribute);
 				}
 
 				const value = attribute.value[0].expression;
@@ -162,9 +166,9 @@ function validate_element(node, context) {
 		} else if (attribute.type === 'AnimateDirective') {
 			const parent = context.path.at(-2);
 			if (parent?.type !== 'EachBlock') {
-				error(attribute, 'invalid-animation', 'no-each');
+				e.animation_invalid_placement(attribute);
 			} else if (!parent.key) {
-				error(attribute, 'invalid-animation', 'each-key');
+				e.animation_missing_key(attribute);
 			} else if (
 				parent.body.nodes.filter(
 					(n) =>
@@ -173,34 +177,39 @@ function validate_element(node, context) {
 						(n.type !== 'Text' || n.data.trim() !== '')
 				).length > 1
 			) {
-				error(attribute, 'invalid-animation', 'child');
+				e.animation_invalid_placement(attribute);
 			}
 
 			if (has_animate_directive) {
-				error(attribute, 'duplicate-animation');
+				e.animation_duplicate(attribute);
 			} else {
 				has_animate_directive = true;
 			}
 		} else if (attribute.type === 'TransitionDirective') {
-			if ((attribute.outro && has_out_transition) || (attribute.intro && has_in_transition)) {
-				/** @param {boolean} _in @param {boolean} _out */
-				const type = (_in, _out) => (_in && _out ? 'transition' : _in ? 'in' : 'out');
-				error(
-					attribute,
-					'duplicate-transition',
-					type(has_in_transition, has_out_transition),
-					type(attribute.intro, attribute.outro)
-				);
+			const existing = /** @type {import('#compiler').TransitionDirective | null} */ (
+				(attribute.intro && in_transition) || (attribute.outro && out_transition)
+			);
+
+			if (existing) {
+				const a = existing.intro ? (existing.outro ? 'transition' : 'in') : 'out';
+				const b = attribute.intro ? (attribute.outro ? 'transition' : 'in') : 'out';
+
+				if (a === b) {
+					e.transition_duplicate(attribute, a);
+				} else {
+					e.transition_conflict(attribute, a, b);
+				}
 			}
 
-			has_in_transition = has_in_transition || attribute.intro;
-			has_out_transition = has_out_transition || attribute.outro;
+			if (attribute.intro) in_transition = attribute;
+			if (attribute.outro) out_transition = attribute;
 		} else if (attribute.type === 'OnDirective') {
 			let has_passive_modifier = false;
 			let conflicting_passive_modifier = '';
 			for (const modifier of attribute.modifiers) {
 				if (!EventModifiers.includes(modifier)) {
-					error(attribute, 'invalid-event-modifier', EventModifiers);
+					const list = `${EventModifiers.slice(0, -1).join(', ')} or ${EventModifiers.at(-1)}`;
+					e.invalid_event_modifier(attribute, list);
 				}
 				if (modifier === 'passive') {
 					has_passive_modifier = true;
@@ -208,12 +217,7 @@ function validate_element(node, context) {
 					conflicting_passive_modifier = modifier;
 				}
 				if (has_passive_modifier && conflicting_passive_modifier) {
-					error(
-						attribute,
-						'invalid-event-modifier-combination',
-						'passive',
-						conflicting_passive_modifier
-					);
+					e.invalid_event_modifier_combination(attribute, 'passive', conflicting_passive_modifier);
 				}
 			}
 		}
@@ -259,7 +263,7 @@ function validate_slot_attribute(context, attribute) {
 
 	if (owner) {
 		if (!is_text_attribute(attribute)) {
-			error(attribute, 'invalid-slot-attribute');
+			e.invalid_slot_attribute(attribute);
 		}
 
 		if (
@@ -268,13 +272,13 @@ function validate_slot_attribute(context, attribute) {
 			owner.type === 'SvelteSelf'
 		) {
 			if (owner !== context.path.at(-2)) {
-				error(attribute, 'invalid-slot-placement');
+				e.invalid_slot_placement(attribute);
 			}
 
 			const name = attribute.value[0].data;
 
 			if (context.state.component_slots.has(name)) {
-				error(attribute, 'duplicate-slot-name', name, owner.name);
+				e.duplicate_slot_name(attribute, name, owner.name);
 			}
 
 			context.state.component_slots.add(name);
@@ -291,12 +295,12 @@ function validate_slot_attribute(context, attribute) {
 						}
 					}
 
-					error(node, 'invalid-default-slot-content');
+					e.invalid_default_slot_content(node);
 				}
 			}
 		}
 	} else {
-		error(attribute, 'invalid-slot-placement');
+		e.invalid_slot_placement(attribute);
 	}
 }
 
@@ -327,7 +331,7 @@ const validation = {
 		const left = object(assignee);
 
 		if (left === null) {
-			error(node, 'invalid-binding-expression');
+			e.invalid_binding_expression(node);
 		}
 
 		const binding = context.state.scope.get(left.name);
@@ -347,25 +351,25 @@ const validation = {
 					binding.kind !== 'store_sub' &&
 					!binding.mutated)
 			) {
-				error(node.expression, 'invalid-binding-value');
+				e.invalid_binding_value(node.expression);
 			}
 
 			if (binding.kind === 'derived') {
-				error(node.expression, 'invalid-derived-binding');
+				e.invalid_binding(node.expression, 'derived state');
 			}
 
 			if (context.state.analysis.runes && binding.kind === 'each') {
-				error(node, 'invalid-each-assignment');
+				e.invalid_each_assignment(node);
 			}
 
 			if (binding.kind === 'snippet') {
-				error(node, 'invalid-snippet-assignment');
+				e.invalid_snippet_assignment(node);
 			}
 		}
 
 		if (node.name === 'group') {
 			if (!binding) {
-				error(node, 'INTERNAL', 'Cannot find declaration for bind:group');
+				throw new Error('Cannot find declaration for bind:group');
 			}
 		}
 
@@ -389,21 +393,14 @@ const validation = {
 			parent?.type === 'SvelteBody'
 		) {
 			if (context.state.options.namespace === 'foreign' && node.name !== 'this') {
-				error(
-					node,
-					'invalid-binding',
-					node.name,
-					undefined,
-					'. Foreign elements only support bind:this'
-				);
+				e.bind_invalid_detailed(node, node.name, 'Foreign elements only support `bind:this`');
 			}
 
 			if (node.name in binding_properties) {
 				const property = binding_properties[node.name];
 				if (property.valid_elements && !property.valid_elements.includes(parent.name)) {
-					error(
+					e.bind_invalid_target(
 						node,
-						'invalid-binding',
 						node.name,
 						property.valid_elements.map((valid_element) => `<${valid_element}>`).join(', ')
 					);
@@ -415,17 +412,17 @@ const validation = {
 					);
 					if (type && !is_text_attribute(type)) {
 						if (node.name !== 'value' || type.value === true) {
-							error(type, 'invalid-type-attribute');
+							e.invalid_type_attribute(type);
 						}
 						return; // bind:value can handle dynamic `type` attributes
 					}
 
 					if (node.name === 'checked' && type?.value[0].data !== 'checkbox') {
-						error(node, 'invalid-binding', node.name, '<input type="checkbox">');
+						e.bind_invalid_target(node, node.name, '<input type="checkbox">');
 					}
 
 					if (node.name === 'files' && type?.value[0].data !== 'file') {
-						error(node, 'invalid-binding', node.name, '<input type="file">');
+						e.bind_invalid_target(node, node.name, '<input type="file">');
 					}
 				}
 
@@ -438,14 +435,13 @@ const validation = {
 							a.value !== true
 					);
 					if (multiple) {
-						error(multiple, 'invalid-multiple-attribute');
+						e.invalid_multiple_attribute(multiple);
 					}
 				}
 
 				if (node.name === 'offsetWidth' && SVGElements.includes(parent.name)) {
-					error(
+					e.bind_invalid_target(
 						node,
-						'invalid-binding',
 						node.name,
 						`non-<svg> elements. Use 'clientWidth' for <svg> instead`
 					);
@@ -456,9 +452,9 @@ const validation = {
 						parent.attributes.find((a) => a.type === 'Attribute' && a.name === 'contenteditable')
 					);
 					if (!contenteditable) {
-						error(node, 'missing-contenteditable-attribute');
+						e.missing_contenteditable_attribute(node);
 					} else if (!is_text_attribute(contenteditable) && contenteditable.value !== true) {
-						error(contenteditable, 'dynamic-contenteditable-attribute');
+						e.dynamic_contenteditable_attribute(contenteditable);
 					}
 				}
 			} else {
@@ -466,15 +462,15 @@ const validation = {
 				if (match) {
 					const property = binding_properties[match];
 					if (!property.valid_elements || property.valid_elements.includes(parent.name)) {
-						error(node, 'invalid-binding', node.name, undefined, ` (did you mean '${match}'?)`);
+						e.bind_invalid_detailed(node, node.name, `Did you mean '${match}'?`);
 					}
 				}
-				error(node, 'invalid-binding', node.name);
+				e.bind_invalid(node, node.name);
 			}
 		}
 	},
 	ExportDefaultDeclaration(node) {
-		error(node, 'default-export');
+		e.default_export(node);
 	},
 	ConstTag(node, context) {
 		const parent = context.path.at(-1);
@@ -491,7 +487,7 @@ const validation = {
 				((grand_parent?.type !== 'RegularElement' && grand_parent?.type !== 'SvelteElement') ||
 					!grand_parent.attributes.some((a) => a.type === 'Attribute' && a.name === 'slot')))
 		) {
-			error(node, 'invalid-const-placement');
+			e.invalid_const_placement(node);
 		}
 	},
 	ImportDeclaration(node, context) {
@@ -502,7 +498,7 @@ const validation = {
 						specifier.imported.name === 'beforeUpdate' ||
 						specifier.imported.name === 'afterUpdate'
 					) {
-						error(specifier, 'invalid-runes-mode-import', specifier.imported.name);
+						e.invalid_runes_mode_import(specifier, specifier.imported.name);
 					}
 				}
 			}
@@ -520,14 +516,14 @@ const validation = {
 				parent.type !== 'SvelteSelf' &&
 				parent.type !== 'SvelteFragment')
 		) {
-			error(node, 'invalid-let-directive-placement');
+			e.invalid_let_directive_placement(node);
 		}
 	},
 	RegularElement(node, context) {
 		if (node.name === 'textarea' && node.fragment.nodes.length > 0) {
 			for (const attribute of node.attributes) {
 				if (attribute.type === 'Attribute' && attribute.name === 'value') {
-					error(node, 'invalid-textarea-content');
+					e.invalid_textarea_content(node);
 				}
 			}
 		}
@@ -551,7 +547,7 @@ const validation = {
 
 		if (context.state.parent_element) {
 			if (!is_tag_valid_with_parent(node.name, context.state.parent_element)) {
-				error(node, 'invalid-node-placement', `<${node.name}>`, context.state.parent_element);
+				e.invalid_node_placement(node, `<${node.name}>`, context.state.parent_element);
 			}
 		}
 
@@ -563,7 +559,7 @@ const validation = {
 					parent.name === node.name &&
 					interactive_elements.has(parent.name)
 				) {
-					error(node, 'invalid-node-placement', `<${node.name}>`, parent.name);
+					e.invalid_node_placement(node, `<${node.name}>`, parent.name);
 				}
 			}
 		}
@@ -572,7 +568,7 @@ const validation = {
 			const path = context.path;
 			for (let parent of path) {
 				if (parent.type === 'RegularElement' && parent.name === 'p') {
-					error(node, 'invalid-node-placement', `<${node.name}>`, parent.name);
+					e.invalid_node_placement(node, `<${node.name}>`, parent.name);
 				}
 			}
 		}
@@ -603,7 +599,7 @@ const validation = {
 		const raw_args = unwrap_optional(node.expression).arguments;
 		for (const arg of raw_args) {
 			if (arg.type === 'SpreadElement') {
-				error(arg, 'invalid-render-spread-argument');
+				e.invalid_render_spread_argument(arg);
 			}
 		}
 
@@ -613,7 +609,7 @@ const validation = {
 			callee.property.type === 'Identifier' &&
 			['bind', 'apply', 'call'].includes(callee.property.name)
 		) {
-			error(node, 'invalid-render-call');
+			e.invalid_render_call(node);
 		}
 
 		const is_inside_textarea = context.path.find((n) => {
@@ -625,9 +621,8 @@ const validation = {
 			);
 		});
 		if (is_inside_textarea) {
-			error(
+			e.invalid_tag_placement(
 				node,
-				'invalid-tag-placement',
 				'inside <textarea> or <svelte:element this="textarea">',
 				'render'
 			);
@@ -667,19 +662,19 @@ const validation = {
 					(node) => node.type !== 'SnippetBlock' && (node.type !== 'Text' || node.data.trim())
 				)
 			) {
-				error(node, 'conflicting-children-snippet');
+				e.conflicting_children_snippet(node);
 			}
 		}
 	},
 	StyleDirective(node) {
 		if (node.modifiers.length > 1 || (node.modifiers.length && node.modifiers[0] !== 'important')) {
-			error(node, 'invalid-style-directive-modifier');
+			e.invalid_style_directive_modifier(node);
 		}
 	},
 	SvelteHead(node) {
 		const attribute = node.attributes[0];
 		if (attribute) {
-			error(attribute, 'illegal-svelte-head-attribute');
+			e.illegal_svelte_head_attribute(attribute);
 		}
 	},
 	SvelteElement(node, context) {
@@ -692,7 +687,7 @@ const validation = {
 	SvelteFragment(node, context) {
 		const parent = context.path.at(-2);
 		if (parent?.type !== 'Component' && parent?.type !== 'SvelteComponent') {
-			error(node, 'invalid-svelte-fragment-placement');
+			e.invalid_svelte_fragment_placement(node);
 		}
 
 		for (const attribute of node.attributes) {
@@ -701,7 +696,7 @@ const validation = {
 					validate_slot_attribute(context, attribute);
 				}
 			} else if (attribute.type !== 'LetDirective') {
-				error(attribute, 'invalid-svelte-fragment-attribute');
+				e.invalid_svelte_fragment_attribute(attribute);
 			}
 		}
 	},
@@ -710,15 +705,15 @@ const validation = {
 			if (attribute.type === 'Attribute') {
 				if (attribute.name === 'name') {
 					if (!is_text_attribute(attribute)) {
-						error(attribute, 'invalid-slot-name', false);
+						e.invalid_slot_name(attribute);
 					}
 					const slot_name = attribute.value[0].data;
 					if (slot_name === 'default') {
-						error(attribute, 'invalid-slot-name', true);
+						e.invalid_slot_name_default(attribute);
 					}
 				}
 			} else if (attribute.type !== 'SpreadAttribute' && attribute.type !== 'LetDirective') {
-				error(attribute, 'invalid-slot-element-attribute');
+				e.invalid_slot_element_attribute(attribute);
 			}
 		}
 	},
@@ -729,19 +724,19 @@ const validation = {
 		if (!node.parent) return;
 		if (context.state.parent_element && regex_not_whitespace.test(node.data)) {
 			if (!is_tag_valid_with_parent('#text', context.state.parent_element)) {
-				error(node, 'invalid-node-placement', 'Text node', context.state.parent_element);
+				e.invalid_node_placement(node, 'Text node', context.state.parent_element);
 			}
 		}
 	},
 	TitleElement(node) {
 		const attribute = node.attributes[0];
 		if (attribute) {
-			error(attribute, 'illegal-title-attribute');
+			e.illegal_title_attribute(attribute);
 		}
 
 		const child = node.fragment.nodes.find((n) => n.type !== 'Text' && n.type !== 'ExpressionTag');
 		if (child) {
-			error(child, 'invalid-title-content');
+			e.invalid_title_content(child);
 		}
 	},
 	UpdateExpression(node, context) {
@@ -751,7 +746,7 @@ const validation = {
 		if (!node.parent) return;
 		if (context.state.parent_element) {
 			if (!is_tag_valid_with_parent('#text', context.state.parent_element)) {
-				error(node, 'invalid-node-placement', '{expression}', context.state.parent_element);
+				e.invalid_node_placement(node, '{expression}', context.state.parent_element);
 			}
 		}
 	}
@@ -772,7 +767,7 @@ export const validation_legacy = merge(validation, a11y_validators, {
 		}
 
 		if (state.scope.get(callee.name)?.kind !== 'store_sub') {
-			error(node.init, 'invalid-rune-usage', callee.name);
+			e.invalid_rune_usage(node.init, callee.name);
 		}
 	},
 	AssignmentExpression(node, { state, path }) {
@@ -805,11 +800,11 @@ function validate_export(node, scope, name) {
 	if (!binding) return;
 
 	if (binding.kind === 'derived') {
-		error(node, 'invalid-derived-export');
+		e.invalid_derived_export(node);
 	}
 
 	if ((binding.kind === 'state' || binding.kind === 'frozen_state') && binding.reassigned) {
-		error(node, 'invalid-state-export');
+		e.invalid_state_export(node);
 	}
 }
 
@@ -827,7 +822,7 @@ function validate_call_expression(node, scope, path) {
 
 	if (rune === '$props') {
 		if (parent.type === 'VariableDeclarator') return;
-		error(node, 'invalid-props-location');
+		e.invalid_props_location(node);
 	}
 
 	if (rune === '$bindable') {
@@ -840,7 +835,7 @@ function validate_call_expression(node, scope, path) {
 				return;
 			}
 		}
-		error(node, 'invalid-bindable-location');
+		e.invalid_bindable_location(node);
 	}
 
 	if (
@@ -851,46 +846,46 @@ function validate_call_expression(node, scope, path) {
 	) {
 		if (parent.type === 'VariableDeclarator') return;
 		if (parent.type === 'PropertyDefinition' && !parent.static && !parent.computed) return;
-		error(node, 'invalid-state-location', rune);
+		e.invalid_state_location(node, rune);
 	}
 
 	if (rune === '$effect' || rune === '$effect.pre') {
 		if (parent.type !== 'ExpressionStatement') {
-			error(node, 'invalid-effect-location');
+			e.invalid_effect_location(node);
 		}
 
 		if (node.arguments.length !== 1) {
-			error(node, 'invalid-rune-args-length', rune, [1]);
+			e.invalid_rune_args_length(node, rune, 'exactly one argument');
 		}
 	}
 
 	if (rune === '$effect.active') {
 		if (node.arguments.length !== 0) {
-			error(node, 'invalid-rune-args-length', rune, [0]);
+			e.invalid_rune_args(node, rune);
 		}
 	}
 
 	if (rune === '$effect.root') {
 		if (node.arguments.length !== 1) {
-			error(node, 'invalid-rune-args-length', rune, [1]);
+			e.invalid_rune_args_length(node, rune, 'exactly one argument');
 		}
 	}
 
 	if (rune === '$inspect') {
 		if (node.arguments.length < 1) {
-			error(node, 'invalid-rune-args-length', rune, [1, 'more']);
+			e.invalid_rune_args_length(node, rune, 'one or more arguments');
 		}
 	}
 
 	if (rune === '$inspect().with') {
 		if (node.arguments.length !== 1) {
-			error(node, 'invalid-rune-args-length', rune, [1]);
+			e.invalid_rune_args_length(node, rune, 'exactly one argument');
 		}
 	}
 
 	if (rune === '$state.snapshot') {
 		if (node.arguments.length !== 1) {
-			error(node, 'invalid-rune-args-length', rune, [1]);
+			e.invalid_rune_args_length(node, rune, 'exactly one argument');
 		}
 	}
 }
@@ -906,7 +901,7 @@ function ensure_no_module_import_conflict(node, state) {
 			state.scope === state.analysis.instance.scope &&
 			state.analysis.module.scope.get(id.name)?.declaration_kind === 'import'
 		) {
-			error(node.id, 'illegal-variable-declaration');
+			e.illegal_variable_declaration(node.id);
 		}
 	}
 }
@@ -932,7 +927,7 @@ export const validation_runes_js = {
 	},
 	CallExpression(node, { state, path }) {
 		if (get_rune(node, state.scope) === '$host') {
-			error(node, 'invalid-host-location');
+			e.invalid_host_location(node);
 		}
 		validate_call_expression(node, state.scope, path);
 	},
@@ -945,13 +940,13 @@ export const validation_runes_js = {
 		const args = /** @type {import('estree').CallExpression} */ (init).arguments;
 
 		if ((rune === '$derived' || rune === '$derived.by') && args.length !== 1) {
-			error(node, 'invalid-rune-args-length', rune, [1]);
+			e.invalid_rune_args_length(node, rune, 'exactly one argument');
 		} else if (rune === '$state' && args.length > 1) {
-			error(node, 'invalid-rune-args-length', rune, [0, 1]);
+			e.invalid_rune_args_length(node, rune, 'zero or one arguments');
 		} else if (rune === '$props') {
-			error(node, 'invalid-props-location');
+			e.invalid_props_location(node);
 		} else if (rune === '$bindable') {
-			error(node, 'invalid-bindable-location');
+			e.invalid_bindable_location(node);
 		}
 	},
 	AssignmentExpression(node, { state }) {
@@ -1021,16 +1016,24 @@ function validate_no_const_assignment(node, argument, scope, is_binding) {
 	} else if (argument.type === 'Identifier') {
 		const binding = scope.get(argument.name);
 		if (binding?.declaration_kind === 'const' && binding.kind !== 'each') {
-			error(
-				node,
-				'invalid-const-assignment',
-				is_binding,
-				// This takes advantage of the fact that we don't assign initial for let directives and then/catch variables.
-				// If we start doing that, we need another property on the binding to differentiate, or give up on the more precise error message.
-				binding.kind !== 'state' &&
-					binding.kind !== 'frozen_state' &&
-					(binding.kind !== 'normal' || !binding.initial)
-			);
+			// e.invalid_const_assignment(
+			// 	node,
+			// 	is_binding,
+			// 	// This takes advantage of the fact that we don't assign initial for let directives and then/catch variables.
+			// 	// If we start doing that, we need another property on the binding to differentiate, or give up on the more precise error message.
+			// 	binding.kind !== 'state' &&
+			// 		binding.kind !== 'frozen_state' &&
+			// 		(binding.kind !== 'normal' || !binding.initial)
+			// );
+
+			// TODO have a more specific error message for assignments to things like `{:then foo}`
+			const thing = 'constant';
+
+			if (is_binding) {
+				e.invalid_binding(node, thing);
+			} else {
+				e.invalid_assignment(node, thing);
+			}
 		}
 	}
 }
@@ -1048,16 +1051,16 @@ function validate_assignment(node, argument, state) {
 
 		if (state.analysis.runes) {
 			if (binding?.kind === 'derived') {
-				error(node, 'invalid-derived-assignment');
+				e.invalid_assignment(node, 'derived state');
 			}
 
 			if (binding?.kind === 'each') {
-				error(node, 'invalid-each-assignment');
+				e.invalid_each_assignment(node);
 			}
 		}
 
 		if (binding?.kind === 'snippet') {
-			error(node, 'invalid-snippet-assignment');
+			e.invalid_snippet_assignment(node);
 		}
 	}
 
@@ -1073,7 +1076,7 @@ function validate_assignment(node, argument, state) {
 
 	if (object.type === 'ThisExpression' && property?.type === 'PrivateIdentifier') {
 		if (state.private_derived_state.includes(property.name)) {
-			error(node, 'invalid-derived-assignment');
+			e.invalid_assignment(node, 'derived state');
 		}
 	}
 }
@@ -1081,7 +1084,7 @@ function validate_assignment(node, argument, state) {
 export const validation_runes = merge(validation, a11y_validators, {
 	LabeledStatement(node, { path }) {
 		if (node.label.name !== '$' || path.at(-1)?.type !== 'Program') return;
-		error(node, 'invalid-legacy-reactive-statement');
+		e.invalid_legacy_reactive_statement(node);
 	},
 	ExportNamedDeclaration(node, { state, next }) {
 		if (state.ast_type === 'module') {
@@ -1099,7 +1102,7 @@ export const validation_runes = merge(validation, a11y_validators, {
 			if (node.declaration?.type !== 'VariableDeclaration') return;
 			if (node.declaration.kind !== 'let') return;
 			if (state.analysis.instance.scope !== state.scope) return;
-			error(node, 'invalid-legacy-export');
+			e.invalid_legacy_export(node);
 		}
 	},
 	ExportSpecifier(node, { state }) {
@@ -1110,12 +1113,12 @@ export const validation_runes = merge(validation, a11y_validators, {
 	CallExpression(node, { state, path }) {
 		const rune = get_rune(node, state.scope);
 		if (rune === '$bindable' && node.arguments.length > 1) {
-			error(node, 'invalid-rune-args-length', '$bindable', [0, 1]);
+			e.invalid_rune_args_length(node, '$bindable', 'zero or one arguments');
 		} else if (rune === '$host') {
 			if (node.arguments.length > 0) {
-				error(node, 'invalid-rune-args-length', '$host', [0]);
+				e.invalid_rune_args(node, '$host');
 			} else if (state.ast_type === 'module' || !state.analysis.custom_element) {
-				error(node, 'invalid-host-location');
+				e.invalid_host_location(node);
 			}
 		}
 
@@ -1127,7 +1130,7 @@ export const validation_runes = merge(validation, a11y_validators, {
 			context.type === 'Identifier' &&
 			(context.name === '$state' || context.name === '$derived')
 		) {
-			error(node, 'invalid-state-location', context.name);
+			e.invalid_state_location(node, context.name);
 		}
 		next({ ...state });
 	},
@@ -1148,39 +1151,39 @@ export const validation_runes = merge(validation, a11y_validators, {
 
 		// TODO some of this is duplicated with above, seems off
 		if ((rune === '$derived' || rune === '$derived.by') && args.length !== 1) {
-			error(node, 'invalid-rune-args-length', rune, [1]);
+			e.invalid_rune_args_length(node, rune, 'exactly one argument');
 		} else if (rune === '$state' && args.length > 1) {
-			error(node, 'invalid-rune-args-length', rune, [0, 1]);
+			e.invalid_rune_args_length(node, rune, 'zero or one arguments');
 		} else if (rune === '$props') {
 			if (state.has_props_rune) {
-				error(node, 'duplicate-props-rune');
+				e.duplicate_props_rune(node);
 			}
 
 			state.has_props_rune = true;
 
 			if (args.length > 0) {
-				error(node, 'invalid-rune-args-length', rune, [0]);
+				e.invalid_rune_args(node, rune);
 			}
 
 			if (node.id.type !== 'ObjectPattern') {
-				error(node, 'invalid-props-id');
+				e.invalid_props_id(node);
 			}
 
 			if (state.scope !== state.analysis.instance.scope) {
-				error(node, 'invalid-props-location');
+				e.invalid_props_location(node);
 			}
 
 			for (const property of node.id.properties) {
 				if (property.type === 'Property') {
 					if (property.computed) {
-						error(property, 'invalid-props-pattern');
+						e.invalid_props_pattern(property);
 					}
 
 					const value =
 						property.value.type === 'AssignmentPattern' ? property.value.left : property.value;
 
 					if (value.type !== 'Identifier') {
-						error(property, 'invalid-props-pattern');
+						e.invalid_props_pattern(property);
 					}
 				}
 			}
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js b/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js
index 70f981d3e6..2498f24a69 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/transform-client.js
@@ -1,5 +1,4 @@
 import { walk } from 'zimmerframe';
-import { error } from '../../../errors.js';
 import * as b from '../../../utils/builders.js';
 import { set_scope } from '../../scope.js';
 import { template_visitors } from './visitors/template.js';
@@ -52,35 +51,41 @@ export function client_component(source, analysis, options) {
 		get before_init() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () =>
-				error(null, 'INTERNAL', 'before_init.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('before_init.push should not be called outside create_block');
+			};
 			return a;
 		},
 		get init() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () => error(null, 'INTERNAL', 'init.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('init.push should not be called outside create_block');
+			};
 			return a;
 		},
 		get update() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () =>
-				error(null, 'INTERNAL', 'update.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('update.push should not be called outside create_block');
+			};
 			return a;
 		},
 		get after_update() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () =>
-				error(null, 'INTERNAL', 'after_update.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('after_update.push should not be called outside create_block');
+			};
 			return a;
 		},
 		get template() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () =>
-				error(null, 'INTERNAL', 'template.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('template.push should not be called outside create_block');
+			};
 			return a;
 		},
 		legacy_reactive_statements: new Map(),
@@ -209,7 +214,7 @@ export function client_component(source, analysis, options) {
 	for (const [node] of analysis.reactive_statements) {
 		const statement = [...state.legacy_reactive_statements].find(([n]) => n === node);
 		if (statement === undefined) {
-			error(node, 'INTERNAL', 'Could not find reactive statement');
+			throw new Error('Could not find reactive statement');
 		}
 		instance.body.push(statement[1]);
 	}
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/utils.js b/packages/svelte/src/compiler/phases/3-transform/client/utils.js
index 17e3fedc1d..481caf6561 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/utils.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/utils.js
@@ -5,7 +5,6 @@ import {
 	is_simple_expression,
 	object
 } from '../../../utils/ast.js';
-import { error } from '../../../errors.js';
 import {
 	PROPS_IS_LAZY_INITIAL,
 	PROPS_IS_IMMUTABLE,
@@ -185,7 +184,7 @@ export function serialize_set_binding(node, context, fallback, options) {
 	}
 
 	if (assignee.type !== 'Identifier' && assignee.type !== 'MemberExpression') {
-		error(node, 'INTERNAL', `Unexpected assignment type ${assignee.type}`);
+		throw new Error(`Unexpected assignment type ${assignee.type}`);
 	}
 
 	// Handle class private/public state assignment cases
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
index e9d3b519c7..9c7706a17c 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
@@ -16,7 +16,6 @@ import {
 import { DOMProperties, PassiveEvents, VoidElements } from '../../../constants.js';
 import { is_custom_element_node, is_element_node } from '../../../nodes.js';
 import * as b from '../../../../utils/builders.js';
-import { error } from '../../../../errors.js';
 import {
 	with_loc,
 	function_visitor,
@@ -1776,10 +1775,10 @@ export const template_visitors = {
 		);
 	},
 	ClassDirective(node, { state, next }) {
-		error(node, 'INTERNAL', 'Node should have been handled elsewhere');
+		throw new Error('Node should have been handled elsewhere');
 	},
 	StyleDirective(node, { state, next }) {
-		error(node, 'INTERNAL', 'Node should have been handled elsewhere');
+		throw new Error('Node should have been handled elsewhere');
 	},
 	TransitionDirective(node, { state, visit }) {
 		let flags = node.modifiers.includes('global') ? TRANSITION_GLOBAL : 0;
@@ -2775,7 +2774,7 @@ export const template_visitors = {
 				}
 
 				default:
-					error(node, 'INTERNAL', 'unknown binding ' + node.name);
+					throw new Error('unknown binding ' + node.name);
 			}
 		}
 
diff --git a/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js b/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js
index 4f631b8c70..2f5ed1d4aa 100644
--- a/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js
+++ b/packages/svelte/src/compiler/phases/3-transform/server/transform-server.js
@@ -22,7 +22,6 @@ import {
 	transform_inspect_rune
 } from '../utils.js';
 import { create_attribute, is_custom_element_node, is_element_node } from '../../nodes.js';
-import { error } from '../../../errors.js';
 import { binding_properties } from '../../bindings.js';
 import { regex_starts_with_newline, regex_whitespaces_strict } from '../../patterns.js';
 import {
@@ -419,7 +418,7 @@ function serialize_set_binding(node, context, fallback) {
 	}
 
 	if (node.left.type !== 'Identifier' && node.left.type !== 'MemberExpression') {
-		error(node, 'INTERNAL', `Unexpected assignment type ${node.left.type}`);
+		throw new Error(`Unexpected assignment type ${node.left.type}`);
 	}
 
 	let left = node.left;
@@ -1311,10 +1310,10 @@ const template_visitors = {
 		state.template.push(block_close);
 	},
 	ClassDirective(node) {
-		error(node, 'INTERNAL', 'Node should have been handled elsewhere');
+		throw new Error('Node should have been handled elsewhere');
 	},
 	StyleDirective(node) {
-		error(node, 'INTERNAL', 'Node should have been handled elsewhere');
+		throw new Error('Node should have been handled elsewhere');
 	},
 	RegularElement(node, context) {
 		const metadata = {
@@ -2106,14 +2105,17 @@ export function server_component(analysis, options) {
 		get init() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () => error(null, 'INTERNAL', 'init.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('init.push should not be called outside create_block');
+			};
 			return a;
 		},
 		get template() {
 			/** @type {any[]} */
 			const a = [];
-			a.push = () =>
-				error(null, 'INTERNAL', 'template.push should not be called outside create_block');
+			a.push = () => {
+				throw new Error('template.push should not be called outside create_block');
+			};
 			return a;
 		},
 		metadata: {
@@ -2181,7 +2183,7 @@ export function server_component(analysis, options) {
 	for (const [node] of analysis.reactive_statements) {
 		const statement = [...state.legacy_reactive_statements].find(([n]) => n === node);
 		if (statement === undefined) {
-			error(node, 'INTERNAL', 'Could not find reactive statement');
+			throw new Error('Could not find reactive statement');
 		}
 
 		if (
diff --git a/packages/svelte/src/compiler/phases/scope.js b/packages/svelte/src/compiler/phases/scope.js
index cfc2f0bb44..d815ff88fd 100644
--- a/packages/svelte/src/compiler/phases/scope.js
+++ b/packages/svelte/src/compiler/phases/scope.js
@@ -2,7 +2,7 @@ import is_reference from 'is-reference';
 import { walk } from 'zimmerframe';
 import { is_element_node } from './nodes.js';
 import * as b from '../utils/builders.js';
-import { error } from '../errors.js';
+import * as e from '../errors.js';
 import { extract_identifiers, extract_identifiers_from_destructuring } from '../utils/ast.js';
 import { JsKeywords, Runes } from './constants.js';
 
@@ -70,7 +70,7 @@ export class Scope {
 	 */
 	declare(node, kind, declaration_kind, initial = null) {
 		if (node.name === '$') {
-			error(node, 'invalid-dollar-binding');
+			e.invalid_dollar_binding(node);
 		}
 
 		if (
@@ -80,7 +80,7 @@ export class Scope {
 			declaration_kind !== 'rest_param' &&
 			this.function_depth <= 1
 		) {
-			error(node, 'invalid-dollar-prefix');
+			e.invalid_dollar_prefix(node);
 		}
 
 		if (this.parent) {
@@ -95,7 +95,7 @@ export class Scope {
 
 		if (this.declarations.has(node.name)) {
 			// This also errors on var/function types, but that's arguably a good thing
-			error(node, 'duplicate-declaration', node.name);
+			e.duplicate_declaration(node, node.name);
 		}
 
 		/** @type {import('#compiler').Binding} */
@@ -166,7 +166,7 @@ export class Scope {
 	get_bindings(node) {
 		const bindings = this.declarators.get(node);
 		if (!bindings) {
-			error(node, 'INTERNAL', 'No binding found for declarator');
+			throw new Error('No binding found for declarator');
 		}
 		return bindings;
 	}
@@ -767,7 +767,7 @@ export function get_rune(node, scope) {
 
 	joined = n.name + joined;
 
-	if (joined === '$derived.call') error(node, 'invalid-derived-call');
+	if (joined === '$derived.call') e.invalid_derived_call(node);
 	if (!Runes.includes(/** @type {any} */ (joined))) return null;
 
 	const binding = scope.get(n.name);
diff --git a/packages/svelte/src/compiler/utils/assert.js b/packages/svelte/src/compiler/utils/assert.js
index ac1cc2bd47..b6dc6bf90c 100644
--- a/packages/svelte/src/compiler/utils/assert.js
+++ b/packages/svelte/src/compiler/utils/assert.js
@@ -1,12 +1,10 @@
-import { error } from '../errors.js';
-
 /**
  * @template T
  * @param {T} value
  * @returns {asserts value is NonNullable<T>}
  */
 export function ok(value) {
-	if (!value) error(null, 'INTERNAL', 'Assertion failed');
+	if (!value) throw new Error('Assertion failed');
 }
 
 /**
@@ -16,5 +14,5 @@ export function ok(value) {
  * @returns {asserts actual is T}
  */
 export function equal(actual, expected) {
-	if (actual !== expected) error(null, 'INTERNAL', 'Assertion failed');
+	if (actual !== expected) throw new Error('Assertion failed');
 }
diff --git a/packages/svelte/src/compiler/validate-options.js b/packages/svelte/src/compiler/validate-options.js
index 6c12a43e2b..d9b0e9b1c3 100644
--- a/packages/svelte/src/compiler/validate-options.js
+++ b/packages/svelte/src/compiler/validate-options.js
@@ -1,4 +1,4 @@
-import { error } from './errors.js';
+import * as e from './errors.js';
 
 /**
  * @template [Input=any]
@@ -141,7 +141,7 @@ export const validate_component_options =
 function removed(msg) {
 	return (input) => {
 		if (input !== undefined) {
-			error(null, 'removed-compiler-option', msg);
+			e.removed_compiler_option(null, msg);
 		}
 		return /** @type {any} */ (undefined);
 	};
@@ -200,9 +200,8 @@ function object(children, allow_unknown = false) {
 				if (allow_unknown) {
 					output[key] = input[key];
 				} else {
-					error(
+					e.invalid_compiler_option(
 						null,
-						'invalid-compiler-option',
 						`Unexpected option ${keypath ? `${keypath}.${key}` : key}`
 					);
 				}
@@ -307,5 +306,5 @@ function fun(fallback) {
 
 /** @param {string} msg */
 function throw_error(msg) {
-	error(null, 'invalid-compiler-option', msg);
+	e.invalid_compiler_option(null, msg);
 }
diff --git a/packages/svelte/tests/compiler-errors/samples/attribute-empty/_config.js b/packages/svelte/tests/compiler-errors/samples/attribute-empty/_config.js
index 248fc1107e..9c29f505ee 100644
--- a/packages/svelte/tests/compiler-errors/samples/attribute-empty/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/attribute-empty/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'missing-attribute-value',
+		code: 'missing_attribute_value',
 		message: 'Expected attribute value',
 		position: [12, 12]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression-2/_config.js b/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression-2/_config.js
index 5fc3e7b5fa..e655d40aae 100644
--- a/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-sequence-expression',
+		code: 'invalid_sequence_expression',
 		message:
 			'Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses',
 		position: [124, 131]
diff --git a/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression/_config.js b/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression/_config.js
index 79ddec267b..15549974d3 100644
--- a/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-sequence-expression',
+		code: 'invalid_sequence_expression',
 		message:
 			'Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses',
 		position: [163, 170]
diff --git a/packages/svelte/tests/compiler-errors/samples/attribute-unique-binding/_config.js b/packages/svelte/tests/compiler-errors/samples/attribute-unique-binding/_config.js
index e933cebbf5..5fb31858b7 100644
--- a/packages/svelte/tests/compiler-errors/samples/attribute-unique-binding/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/attribute-unique-binding/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-attribute',
+		code: 'duplicate_attribute',
 		message: 'Attributes need to be unique',
 		position: [17, 17]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/attribute-unique-shorthand/_config.js b/packages/svelte/tests/compiler-errors/samples/attribute-unique-shorthand/_config.js
index e933cebbf5..5fb31858b7 100644
--- a/packages/svelte/tests/compiler-errors/samples/attribute-unique-shorthand/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/attribute-unique-shorthand/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-attribute',
+		code: 'duplicate_attribute',
 		message: 'Attributes need to be unique',
 		position: [17, 17]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/attribute-unique/_config.js b/packages/svelte/tests/compiler-errors/samples/attribute-unique/_config.js
index e933cebbf5..5fb31858b7 100644
--- a/packages/svelte/tests/compiler-errors/samples/attribute-unique/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/attribute-unique/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-attribute',
+		code: 'duplicate_attribute',
 		message: 'Attributes need to be unique',
 		position: [17, 17]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/catch-before-closing/_config.js b/packages/svelte/tests/compiler-errors/samples/catch-before-closing/_config.js
index 1a50076da4..52786af6d8 100644
--- a/packages/svelte/tests/compiler-errors/samples/catch-before-closing/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/catch-before-closing/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:else}',
 		position: [35, 35]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/catch-without-await/_config.js b/packages/svelte/tests/compiler-errors/samples/catch-without-await/_config.js
index 64c85f85c9..b24874f1b4 100644
--- a/packages/svelte/tests/compiler-errors/samples/catch-without-await/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/catch-without-await/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [1, 1]
diff --git a/packages/svelte/tests/compiler-errors/samples/class-state-field-static/_config.js b/packages/svelte/tests/compiler-errors/samples/class-state-field-static/_config.js
index dca19b4606..d212e197f0 100644
--- a/packages/svelte/tests/compiler-errors/samples/class-state-field-static/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/class-state-field-static/_config.js
@@ -2,8 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$state(...) can only be used as a variable declaration initializer or a class field',
+		code: 'invalid_state_location',
+		message:
+			'`$state(...)` can only be used as a variable declaration initializer or a class field',
 		position: [33, 41]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/comment-unclosed/_config.js b/packages/svelte/tests/compiler-errors/samples/comment-unclosed/_config.js
index 7c00375ad6..38bc06f415 100644
--- a/packages/svelte/tests/compiler-errors/samples/comment-unclosed/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/comment-unclosed/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unexpected-eof',
-		message: 'Unexpected end of input (expected -->)',
+		code: 'expected_token',
+		message: 'Expected token -->',
 		position: [24, 24]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-2/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-2/_config.js
index 0085693908..2dafcd66b1 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-3/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-3/_config.js
index 0085693908..2dafcd66b1 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-3/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-3/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-4/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-4/_config.js
index 78e10808bd..1a8d68c564 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-4/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-4/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-default-slot-content',
+		code: 'invalid_default_slot_content',
 		message: 'Found default slot content alongside an explicit slot="default"'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-5/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-5/_config.js
index 0085693908..2dafcd66b1 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-5/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-5/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-6/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-6/_config.js
index 0085693908..2dafcd66b1 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-6/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-6/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error/_config.js
index 0085693908..2dafcd66b1 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-2/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-2/_config.js
index 69c2adb23c..727e0c8bda 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-slot-placement',
+		code: 'invalid_slot_placement',
 		message:
 			"Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-3/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-3/_config.js
index 69c2adb23c..727e0c8bda 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-3/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-3/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-slot-placement',
+		code: 'invalid_slot_placement',
 		message:
 			"Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error/_config.js b/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error/_config.js
index 69c2adb23c..727e0c8bda 100644
--- a/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/component-slot-nested-error/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-slot-placement',
+		code: 'invalid_slot_placement',
 		message:
 			"Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js
index 6a11aa63ec..77baf5a87e 100644
--- a/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-combinator',
+		code: 'invalid_css_global_block_combinator',
 		message: 'A :global {...} block cannot follow a > combinator',
 		position: [12, 21]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js
index 7b637ca42e..5d2a52465f 100644
--- a/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-declaration',
+		code: 'invalid_css_global_block_declaration',
 		message: 'A :global {...} block can only contain rules, not declarations',
 		position: [24, 34]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js
index 9e7cac667f..63b20e7e36 100644
--- a/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-modifier',
+		code: 'invalid_css_global_block_modifier',
 		message: 'A :global {...} block cannot modify an existing selector',
 		position: [14, 21]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js b/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js
index 8021a9c677..bb189b05f5 100644
--- a/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-list',
+		code: 'invalid_css_global_block_list',
 		message: 'A :global {...} block cannot be part of a selector list with more than one item',
 		position: [9, 31]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/css/_config.js b/packages/svelte/tests/compiler-errors/samples/css/_config.js
index 9705cde6b5..74ef4c9c6c 100644
--- a/packages/svelte/tests/compiler-errors/samples/css/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/css/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-identifier',
+		code: 'invalid_css_identifier',
 		message: 'Expected a valid CSS identifier',
 		position: [25, 25]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/dollar-binding-declaration/_config.js b/packages/svelte/tests/compiler-errors/samples/dollar-binding-declaration/_config.js
index a49d35d090..7141ff1efd 100644
--- a/packages/svelte/tests/compiler-errors/samples/dollar-binding-declaration/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/dollar-binding-declaration/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-dollar-binding',
+		code: 'invalid_dollar_binding',
 		message: 'The $ name is reserved, and cannot be used for variables and imports'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/dollar-binding-global-js/_config.js b/packages/svelte/tests/compiler-errors/samples/dollar-binding-global-js/_config.js
index 666b798323..ae86ca8d6b 100644
--- a/packages/svelte/tests/compiler-errors/samples/dollar-binding-global-js/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/dollar-binding-global-js/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-global',
+		code: 'illegal_global',
 		message:
-			'$ is an illegal variable name. To reference a global variable called $, use globalThis.$'
+			'`$` is an illegal variable name. To reference a global variable called `$`, use `globalThis.$`'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/dollar-binding-global/_config.js b/packages/svelte/tests/compiler-errors/samples/dollar-binding-global/_config.js
index 666b798323..ae86ca8d6b 100644
--- a/packages/svelte/tests/compiler-errors/samples/dollar-binding-global/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/dollar-binding-global/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-global',
+		code: 'illegal_global',
 		message:
-			'$ is an illegal variable name. To reference a global variable called $, use globalThis.$'
+			'`$` is an illegal variable name. To reference a global variable called `$`, use `globalThis.$`'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/dollar-binding-import/_config.js b/packages/svelte/tests/compiler-errors/samples/dollar-binding-import/_config.js
index a49d35d090..7141ff1efd 100644
--- a/packages/svelte/tests/compiler-errors/samples/dollar-binding-import/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/dollar-binding-import/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-dollar-binding',
+		code: 'invalid_dollar_binding',
 		message: 'The $ name is reserved, and cannot be used for variables and imports'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/dynamic-element-binding-invalid/_config.js b/packages/svelte/tests/compiler-errors/samples/dynamic-element-binding-invalid/_config.js
index 6934ea4c55..4bb3edc27b 100644
--- a/packages/svelte/tests/compiler-errors/samples/dynamic-element-binding-invalid/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/dynamic-element-binding-invalid/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-binding',
-		message: "'value' binding can only be used with <input>, <textarea>, <select>"
+		code: 'bind_invalid_target',
+		message: '`bind:value` can only be used with <input>, <textarea>, <select>'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/else-before-closing-2/_config.js b/packages/svelte/tests/compiler-errors/samples/else-before-closing-2/_config.js
index dc9aff145c..54ef1afa7b 100644
--- a/packages/svelte/tests/compiler-errors/samples/else-before-closing-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/else-before-closing-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:then ...} or {:catch ...}',
 		position: [24, 24]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/else-before-closing-3/_config.js b/packages/svelte/tests/compiler-errors/samples/else-before-closing-3/_config.js
index 80a2a136db..c052f05a18 100644
--- a/packages/svelte/tests/compiler-errors/samples/else-before-closing-3/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/else-before-closing-3/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [6, 6]
diff --git a/packages/svelte/tests/compiler-errors/samples/else-before-closing/_config.js b/packages/svelte/tests/compiler-errors/samples/else-before-closing/_config.js
index 87c1296f49..6883152c09 100644
--- a/packages/svelte/tests/compiler-errors/samples/else-before-closing/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/else-before-closing/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [18, 18]
diff --git a/packages/svelte/tests/compiler-errors/samples/else-if-before-closing-2/_config.js b/packages/svelte/tests/compiler-errors/samples/else-if-before-closing-2/_config.js
index 4b4059cf3b..d2ab9b9090 100644
--- a/packages/svelte/tests/compiler-errors/samples/else-if-before-closing-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/else-if-before-closing-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [17, 17]
diff --git a/packages/svelte/tests/compiler-errors/samples/else-if-before-closing/_config.js b/packages/svelte/tests/compiler-errors/samples/else-if-before-closing/_config.js
index ae20d2da8c..da19e5e806 100644
--- a/packages/svelte/tests/compiler-errors/samples/else-if-before-closing/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/else-if-before-closing/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:then ...} or {:catch ...}',
 		position: [26, 26]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/else-if-without-if/_config.js b/packages/svelte/tests/compiler-errors/samples/else-if-without-if/_config.js
index 04d8342f20..706e610cba 100644
--- a/packages/svelte/tests/compiler-errors/samples/else-if-without-if/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/else-if-without-if/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:then ...} or {:catch ...}',
 		position: [27, 27]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/empty-attribute-shorthand/_config.js b/packages/svelte/tests/compiler-errors/samples/empty-attribute-shorthand/_config.js
index 5c6855f41b..fd20583e57 100644
--- a/packages/svelte/tests/compiler-errors/samples/empty-attribute-shorthand/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/empty-attribute-shorthand/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'empty-attribute-shorthand',
+		code: 'empty_attribute_shorthand',
 		message: 'Attribute shorthand cannot be empty',
 		position: [6, 6]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/empty-classname-binding/_config.js b/packages/svelte/tests/compiler-errors/samples/empty-classname-binding/_config.js
index bd1d1d7682..087c2e55d9 100644
--- a/packages/svelte/tests/compiler-errors/samples/empty-classname-binding/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/empty-classname-binding/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'empty-directive-name',
+		code: 'empty_directive_name',
 		message: 'ClassDirective name cannot be empty',
 		position: [10, 10]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/empty-directive-name/_config.js b/packages/svelte/tests/compiler-errors/samples/empty-directive-name/_config.js
index 48a0eb32c4..22338ec818 100644
--- a/packages/svelte/tests/compiler-errors/samples/empty-directive-name/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/empty-directive-name/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'empty-directive-name',
+		code: 'empty_directive_name',
 		message: 'UseDirective name cannot be empty',
 		position: [8, 8]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/export-derived-state/_config.js b/packages/svelte/tests/compiler-errors/samples/export-derived-state/_config.js
index fd70495836..9e77a92f52 100644
--- a/packages/svelte/tests/compiler-errors/samples/export-derived-state/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/export-derived-state/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-export',
+		code: 'invalid_derived_export',
 		message:
 			'Cannot export derived state from a module. To expose the current derived value, export a function returning its value',
 		position: [24, 66]
diff --git a/packages/svelte/tests/compiler-errors/samples/export-state-module/_config.js b/packages/svelte/tests/compiler-errors/samples/export-state-module/_config.js
index f1bad80670..3cc26ce501 100644
--- a/packages/svelte/tests/compiler-errors/samples/export-state-module/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/export-state-module/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-export',
+		code: 'invalid_state_export',
 		message:
 			"Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties",
 		position: [76, 114]
diff --git a/packages/svelte/tests/compiler-errors/samples/export-state/_config.js b/packages/svelte/tests/compiler-errors/samples/export-state/_config.js
index 1f7bd0f767..94d31700f2 100644
--- a/packages/svelte/tests/compiler-errors/samples/export-state/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/export-state/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-export',
+		code: 'invalid_state_export',
 		message:
 			"Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties",
 		position: [46, 86]
diff --git a/packages/svelte/tests/compiler-errors/samples/illegal-expression/_config.js b/packages/svelte/tests/compiler-errors/samples/illegal-expression/_config.js
index 887f11e882..bef5afd00d 100644
--- a/packages/svelte/tests/compiler-errors/samples/illegal-expression/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/illegal-expression/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'js-parse-error',
+		code: 'js_parse_error',
 		message: 'Assigning to rvalue',
 		position: [1, 1]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/invalid-snippet-binding/_config.js b/packages/svelte/tests/compiler-errors/samples/invalid-snippet-binding/_config.js
index a507812928..b0ee9ddfd4 100644
--- a/packages/svelte/tests/compiler-errors/samples/invalid-snippet-binding/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/invalid-snippet-binding/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-snippet-assignment',
+		code: 'invalid_snippet_assignment',
 		message: 'Cannot reassign or bind to snippet parameter'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/invalid-snippet-mutation/_config.js b/packages/svelte/tests/compiler-errors/samples/invalid-snippet-mutation/_config.js
index a507812928..b0ee9ddfd4 100644
--- a/packages/svelte/tests/compiler-errors/samples/invalid-snippet-mutation/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/invalid-snippet-mutation/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-snippet-assignment',
+		code: 'invalid_snippet_assignment',
 		message: 'Cannot reassign or bind to snippet parameter'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/legacy-no-const-assignment/_config.js b/packages/svelte/tests/compiler-errors/samples/legacy-no-const-assignment/_config.js
index f2503be0e3..247cc5b09f 100644
--- a/packages/svelte/tests/compiler-errors/samples/legacy-no-const-assignment/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/legacy-no-const-assignment/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/legacy-no-const-update/_config.js b/packages/svelte/tests/compiler-errors/samples/legacy-no-const-update/_config.js
index f2503be0e3..247cc5b09f 100644
--- a/packages/svelte/tests/compiler-errors/samples/legacy-no-const-update/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/legacy-no-const-update/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/multiple-styles/_config.js b/packages/svelte/tests/compiler-errors/samples/multiple-styles/_config.js
index 50cf2583af..f42fd1af86 100644
--- a/packages/svelte/tests/compiler-errors/samples/multiple-styles/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/multiple-styles/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-style-element',
-		message: 'A component can have a single top-level <style> element',
+		code: 'duplicate_style_element',
+		message: 'A component can have a single top-level `<style>` element',
 		position: [58, 58]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/options-children/_config.js b/packages/svelte/tests/compiler-errors/samples/options-children/_config.js
index d08406c499..5ec5f02752 100644
--- a/packages/svelte/tests/compiler-errors/samples/options-children/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/options-children/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-element-content',
+		code: 'invalid_element_content',
 		message: '<svelte:options> cannot have children',
 		position: [16, 16]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/raw-mustaches-whitespace/_config.js b/packages/svelte/tests/compiler-errors/samples/raw-mustaches-whitespace/_config.js
index 67d197780e..06adb4706c 100644
--- a/packages/svelte/tests/compiler-errors/samples/raw-mustaches-whitespace/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/raw-mustaches-whitespace/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'missing-whitespace',
+		code: 'missing_whitespace',
 		message: 'Expected whitespace',
 		position: [6, 6]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/render-tag-invalid-call/_config.js b/packages/svelte/tests/compiler-errors/samples/render-tag-invalid-call/_config.js
index 47bd37699c..f1380710e2 100644
--- a/packages/svelte/tests/compiler-errors/samples/render-tag-invalid-call/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/render-tag-invalid-call/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-render-call',
+		code: 'invalid_render_call',
 		message: 'Calling a snippet function using apply, bind or call is not allowed'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-before-after-update/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-before-after-update/_config.js
index d597478bb2..7b2f863d7c 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-before-after-update/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-before-after-update/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-runes-mode-import',
+		code: 'invalid_runes_mode_import',
 		message: 'beforeUpdate cannot be used in runes mode'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-duplicate-props/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-duplicate-props/_config.js
index d2a4eab786..9620704d61 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-duplicate-props/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-duplicate-props/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-props-rune',
-		message: 'Cannot use $props() more than once'
+		code: 'duplicate_props_rune',
+		message: 'Cannot use `$props()` more than once'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-export-let/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-export-let/_config.js
index 800bdbe853..50cfed6032 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-export-let/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-export-let/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-legacy-export',
+		code: 'invalid_legacy_export',
 		message: 'Cannot use `export let` in runes mode — use $props instead'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-export-named-state/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-export-named-state/_config.js
index fb1be5730b..22f2f6596a 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-export-named-state/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-export-named-state/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-export',
+		code: 'invalid_state_export',
 		message:
 			"Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties",
 		position: [28, 53]
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-binding/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-binding/_config.js
index 55eb0280ae..e60f4e86e7 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-binding/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-binding/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-each-assignment',
+		code: 'invalid_each_assignment',
 		message:
-			"Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. 'array[i] = value' instead of 'entry = value')"
+			'Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-mutation/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-mutation/_config.js
index 55eb0280ae..e60f4e86e7 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-mutation/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-invalid-each-mutation/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-each-assignment',
+		code: 'invalid_each_assignment',
 		message:
-			"Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. 'array[i] = value' instead of 'entry = value')"
+			'Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-const-assignment/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-const-assignment/_config.js
index f2503be0e3..247cc5b09f 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-const-assignment/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-const-assignment/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-const-update/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-const-update/_config.js
index f2503be0e3..247cc5b09f 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-const-update/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-const-update/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-assignment/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-assignment/_config.js
index 6e40da1a81..1fae570f91 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-assignment/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-assignment/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-binding/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-binding/_config.js
index 3a27b1f9bd..b2f418e384 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-binding/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-binding/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-binding',
-		message: 'Invalid binding to derived state'
+		code: 'invalid_binding',
+		message: 'Cannot bind to derived state'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-assignment/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-assignment/_config.js
index 6e40da1a81..1fae570f91 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-assignment/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-assignment/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-update/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-update/_config.js
index 6e40da1a81..1fae570f91 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-update/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-update/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-update/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-update/_config.js
index 6e40da1a81..1fae570f91 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-derived-update/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-derived-update/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-no-rune-each/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-no-rune-each/_config.js
index 9089b6acca..00edfe51b3 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-no-rune-each/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-no-rune-each/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$state(...) can only be used as a variable declaration initializer or a class field'
+		code: 'invalid_state_location',
+		message: '`$state(...)` can only be used as a variable declaration initializer or a class field'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-prop-export-conflict/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-prop-export-conflict/_config.js
index a6e4a4c018..cfd4f2cb67 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-prop-export-conflict/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-prop-export-conflict/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'conflicting-property-name',
+		code: 'conflicting_property_name',
 		message: 'Cannot have a property and a component export with the same name'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-args/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-args/_config.js
index 0d1d0e0709..1024076a6a 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-args/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-args/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$bindable can only be called with 0 or 1 arguments'
+		code: 'invalid_rune_args_length',
+		message: '`$bindable` must be called with zero or one arguments'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-placement/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-placement/_config.js
index bc92ee9ced..76d48b43be 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-placement/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-placement/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-bindable-location',
-		message: '$bindable() can only be used inside a $props() declaration'
+		code: 'invalid_bindable_location',
+		message: '`$bindable()` can only be used inside a `$props()` declaration'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-args/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-args/_config.js
index 7a37736485..4b9ad2c572 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-args/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-args/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$derived can only be called with 1 argument'
+		code: 'invalid_rune_args_length',
+		message: '`$derived` must be called with exactly one argument'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-placement/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-placement/_config.js
index 73c8bf1299..5bde7150ec 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-placement/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-placement/_config.js
@@ -2,7 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$derived(...) can only be used as a variable declaration initializer or a class field'
+		code: 'invalid_state_location',
+		message:
+			'`$derived(...)` can only be used as a variable declaration initializer or a class field'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-args/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-args/_config.js
index 3ebcd022a9..ed08b7682a 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-args/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-args/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$effect can only be called with 1 argument'
+		code: 'invalid_rune_args_length',
+		message: '`$effect` must be called with exactly one argument'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-placement/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-placement/_config.js
index 529fe44137..b8c4ad0c05 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-placement/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-placement/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-effect-location',
-		message: '$effect() can only be used as an expression statement'
+		code: 'invalid_effect_location',
+		message: '`$effect()` can only be used as an expression statement'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-host-placement/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-host-placement/_config.js
index f848528c6c..37c34a7384 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-host-placement/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-host-placement/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-host-location',
-		message: '$host() can only be used inside custom element component instances'
+		code: 'invalid_host_location',
+		message: '`$host()` can only be used inside custom element component instances'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-args/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-args/_config.js
index c37b3486bd..eb6bc22ed5 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-args/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-args/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$props can only be called with 0 arguments'
+		code: 'invalid_rune_args',
+		message: '`$props` cannot be called with arguments'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-placement/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-placement/_config.js
index 0067f4f986..ebf5040fff 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-placement/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-props-placement/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-props-location',
+		code: 'invalid_props_location',
 		message:
-			'$props() can only be used at the top level of components as a variable declaration initializer'
+			'`$props()` can only be used at the top level of components as a variable declaration initializer'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-args/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-args/_config.js
index 2d995aa0c1..30fd430140 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-args/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-args/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$state can only be called with 0 or 1 arguments'
+		code: 'invalid_rune_args_length',
+		message: '`$state` must be called with zero or one arguments'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-placement/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-placement/_config.js
index 9089b6acca..00edfe51b3 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-placement/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-placement/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$state(...) can only be used as a variable declaration initializer or a class field'
+		code: 'invalid_state_location',
+		message: '`$state(...)` can only be used as a variable declaration initializer or a class field'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-snapshot-args/_config.js b/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-snapshot-args/_config.js
index c701cfac7e..ab7ce7b201 100644
--- a/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-snapshot-args/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/runes-wrong-state-snapshot-args/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$state.snapshot can only be called with 1 argument'
+		code: 'invalid_rune_args_length',
+		message: '`$state.snapshot` must be called with exactly one argument'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/script-unclosed-eof/_config.js b/packages/svelte/tests/compiler-errors/samples/script-unclosed-eof/_config.js
index c8b496e41e..5c2c74eb54 100644
--- a/packages/svelte/tests/compiler-errors/samples/script-unclosed-eof/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/script-unclosed-eof/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unexpected-eof',
+		code: 'unexpected_eof',
 		message: 'Unexpected end of input',
 		position: [32, 32]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/script-unclosed/_config.js b/packages/svelte/tests/compiler-errors/samples/script-unclosed/_config.js
index 30c59d6f28..04ec9db510 100644
--- a/packages/svelte/tests/compiler-errors/samples/script-unclosed/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/script-unclosed/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unclosed-element',
-		message: '<script> was left open',
+		code: 'unclosed_element',
+		message: '`<script>` was left open',
 		position: [32, 32]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js b/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js
index 8148e18332..be27484ce6 100644
--- a/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/self-reference/_config.js
@@ -2,9 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-self-placement',
+		code: 'invalid_self_placement',
 		message:
-			'<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components',
+			'`<svelte:self>` components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components',
 		position: [1, 1]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/slot-conflicting-with-render-tag/_config.js b/packages/svelte/tests/compiler-errors/samples/slot-conflicting-with-render-tag/_config.js
index c027d4fd5b..d85305d319 100644
--- a/packages/svelte/tests/compiler-errors/samples/slot-conflicting-with-render-tag/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/slot-conflicting-with-render-tag/_config.js
@@ -2,9 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'conflicting-slot-usage',
+		code: 'conflicting_slot_usage',
 		message:
-			'Cannot use <slot> syntax and {@render ...} tags in the same component. Migrate towards {@render ...} tags completely.',
+			'Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migrate towards `{@render ...}` tags completely.',
 		position: [71, 84]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/snippet-children-conflict/_config.js b/packages/svelte/tests/compiler-errors/samples/snippet-children-conflict/_config.js
index 3fd2caaeda..747c75ad3a 100644
--- a/packages/svelte/tests/compiler-errors/samples/snippet-children-conflict/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/snippet-children-conflict/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'conflicting-children-snippet',
+		code: 'conflicting_children_snippet',
 		message:
 			'Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block',
 		position: [320, 353]
diff --git a/packages/svelte/tests/compiler-errors/samples/store-autosub-context-module/_config.js b/packages/svelte/tests/compiler-errors/samples/store-autosub-context-module/_config.js
index 526d292530..5f45a792bf 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-autosub-context-module/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-autosub-context-module/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-subscription',
-		message: 'Cannot reference store value inside <script context="module">',
+		code: 'illegal_subscription',
+		message: 'Cannot reference store value inside `<script context="module">`',
 		position: [164, 168]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/store-contextual/_config.js b/packages/svelte/tests/compiler-errors/samples/store-contextual/_config.js
index 2a7d0fa0ec..6a49672737 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-contextual/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-contextual/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/store-global-disallowed/_config.js b/packages/svelte/tests/compiler-errors/samples/store-global-disallowed/_config.js
index 94a461f3aa..649aeffd37 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-global-disallowed/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-global-disallowed/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-global',
+		code: 'illegal_global',
 		message:
-			'$foo is an illegal variable name. To reference a global variable called $foo, use globalThis.$foo'
+			'`$foo` is an illegal variable name. To reference a global variable called `$foo`, use `globalThis.$foo`'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/store-prevent-user-declarations/_config.js b/packages/svelte/tests/compiler-errors/samples/store-prevent-user-declarations/_config.js
index 97bc9d4c3d..d2ef4fa288 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-prevent-user-declarations/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-prevent-user-declarations/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-dollar-prefix',
+		code: 'invalid_dollar_prefix',
 		message: 'The $ prefix is reserved, and cannot be used for variables and imports'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-2/_config.js b/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-2/_config.js
index f320abac21..85112aa728 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component',
 		position: [142, 147]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-3/_config.js b/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-3/_config.js
index 74e25f3bf1..dea59242b9 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-3/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-shadow-scope-3/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component',
 		position: [167, 172]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/store-shadow-scope/_config.js b/packages/svelte/tests/compiler-errors/samples/store-shadow-scope/_config.js
index 2a7d0fa0ec..6a49672737 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-shadow-scope/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-shadow-scope/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/store-template-expression-scope/_config.js b/packages/svelte/tests/compiler-errors/samples/store-template-expression-scope/_config.js
index 2a7d0fa0ec..6a49672737 100644
--- a/packages/svelte/tests/compiler-errors/samples/store-template-expression-scope/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/store-template-expression-scope/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component'
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/style-unclosed-eof/_config.js b/packages/svelte/tests/compiler-errors/samples/style-unclosed-eof/_config.js
index 8d27a7297d..e915428ca6 100644
--- a/packages/svelte/tests/compiler-errors/samples/style-unclosed-eof/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/style-unclosed-eof/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token </style',
 		position: [31, 31]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/style-unclosed/_config.js b/packages/svelte/tests/compiler-errors/samples/style-unclosed/_config.js
index 602f196039..294867d7f5 100644
--- a/packages/svelte/tests/compiler-errors/samples/style-unclosed/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/style-unclosed/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-identifier',
+		code: 'invalid_css_identifier',
 		message: 'Expected a valid CSS identifier',
 		position: [9, 9]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/svelte-selfdestructive/_config.js b/packages/svelte/tests/compiler-errors/samples/svelte-selfdestructive/_config.js
index b88609ffe9..f5ff354027 100644
--- a/packages/svelte/tests/compiler-errors/samples/svelte-selfdestructive/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/svelte-selfdestructive/_config.js
@@ -2,9 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-svelte-tag',
+		code: 'invalid_svelte_tag',
 		message:
-			'Valid <svelte:...> tag names are svelte:head, svelte:options, svelte:window, svelte:document, svelte:body, svelte:element, svelte:component, svelte:self or svelte:fragment',
+			'Valid `<svelte:...>` tag names are svelte:head, svelte:options, svelte:window, svelte:document, svelte:body, svelte:element, svelte:component, svelte:self or svelte:fragment',
 		position: [10, 10]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/then-before-closing/_config.js b/packages/svelte/tests/compiler-errors/samples/then-before-closing/_config.js
index 7c1ea02cc1..cef6538067 100644
--- a/packages/svelte/tests/compiler-errors/samples/then-before-closing/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/then-before-closing/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [21, 21]
diff --git a/packages/svelte/tests/compiler-errors/samples/then-without-await/_config.js b/packages/svelte/tests/compiler-errors/samples/then-without-await/_config.js
index 64c85f85c9..b24874f1b4 100644
--- a/packages/svelte/tests/compiler-errors/samples/then-without-await/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/then-without-await/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [1, 1]
diff --git a/packages/svelte/tests/compiler-errors/samples/unclosed-attribute-self-close-tag/_config.js b/packages/svelte/tests/compiler-errors/samples/unclosed-attribute-self-close-tag/_config.js
index 2f4ec8835f..5a33a0c237 100644
--- a/packages/svelte/tests/compiler-errors/samples/unclosed-attribute-self-close-tag/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unclosed-attribute-self-close-tag/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unclosed-attribute-value',
+		code: 'unclosed_attribute_value',
 		message: 'Expected closing } character',
 		position: [19, 19]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-b/_config.js b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-b/_config.js
index e69ada8861..25dbf88c64 100644
--- a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-b/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-b/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unexpected-eof',
+		code: 'unexpected_eof',
 		message: 'Unexpected end of input',
 		position: [2, 2]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-c/_config.js b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-c/_config.js
index 47a1b49f03..edaeb89e40 100644
--- a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-c/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-c/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unexpected-eof',
+		code: 'unexpected_eof',
 		message: 'Unexpected end of input',
 		position: [1, 1]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-d/_config.js b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-d/_config.js
index b10de772d3..5099013e16 100644
--- a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-d/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input-d/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unclosed-block',
+		code: 'unclosed_block',
 		message: 'Block was left open',
 		position: [0, 1]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input/_config.js b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input/_config.js
index 8ff85b7243..6ab0c7f716 100644
--- a/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unexpected-end-of-input/_config.js
@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unclosed-element',
-		message: '<div> was left open',
+		code: 'unclosed_element',
+		message: '`<div>` was left open',
 		position: [0, 1]
 	}
 });
diff --git a/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose-2/_config.js b/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose-2/_config.js
index e0b8622711..824db2ae2e 100644
--- a/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose-2/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose-2/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-closing-tag',
+		code: 'invalid_closing_tag',
 		message: '</p> attempted to close an element that was not open',
 		position: [38, 38]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose/_config.js b/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose/_config.js
index 38731fed64..bfd76bff4f 100644
--- a/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag-autoclose/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-closing-tag-after-autoclose',
+		code: 'invalid_closing_tag_after_autoclose',
 		message:
 			'</p> attempted to close element that was already automatically closed by <pre> (cannot nest <pre> inside <p>)',
 		position: [24, 24]
diff --git a/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag/_config.js b/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag/_config.js
index dd6995d832..6609a11e42 100644
--- a/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/unmatched-closing-tag/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-closing-tag',
+		code: 'invalid_closing_tag',
 		message: '</div> attempted to close an element that was not open',
 		position: [0, 0]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/void-closing/_config.js b/packages/svelte/tests/compiler-errors/samples/void-closing/_config.js
index 704d8c6029..360fcec971 100644
--- a/packages/svelte/tests/compiler-errors/samples/void-closing/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/void-closing/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-void-content',
+		code: 'invalid_void_content',
 		message: 'Void elements cannot have children or closing tags',
 		position: [23, 23]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/window-children/_config.js b/packages/svelte/tests/compiler-errors/samples/window-children/_config.js
index 33b57bf5f6..a788c01ad5 100644
--- a/packages/svelte/tests/compiler-errors/samples/window-children/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/window-children/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-element-content',
+		code: 'invalid_element_content',
 		message: '<svelte:window> cannot have children',
 		position: [15, 15]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/window-duplicate/_config.js b/packages/svelte/tests/compiler-errors/samples/window-duplicate/_config.js
index 9c068c0297..fed30e9475 100644
--- a/packages/svelte/tests/compiler-errors/samples/window-duplicate/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/window-duplicate/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-svelte-element',
+		code: 'duplicate_svelte_element',
 		message: 'A component can only have one <svelte:window> element',
 		position: [17, 17]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/window-inside-block/_config.js b/packages/svelte/tests/compiler-errors/samples/window-inside-block/_config.js
index 698c3813e6..36bda11a77 100644
--- a/packages/svelte/tests/compiler-errors/samples/window-inside-block/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/window-inside-block/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-svelte-element-placement',
+		code: 'invalid_svelte_element_placement',
 		message: '<svelte:window> tags cannot be inside elements or blocks',
 		position: [11, 11]
 	}
diff --git a/packages/svelte/tests/compiler-errors/samples/window-inside-element/_config.js b/packages/svelte/tests/compiler-errors/samples/window-inside-element/_config.js
index 04aba56e54..844353ac1b 100644
--- a/packages/svelte/tests/compiler-errors/samples/window-inside-element/_config.js
+++ b/packages/svelte/tests/compiler-errors/samples/window-inside-element/_config.js
@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-svelte-element-placement',
+		code: 'invalid_svelte_element_placement',
 		message: '<svelte:window> tags cannot be inside elements or blocks',
 		position: [7, 7]
 	}
diff --git a/packages/svelte/tests/validator/samples/action-on-component/errors.json b/packages/svelte/tests/validator/samples/action-on-component/errors.json
index 6516cf9108..f190f2282f 100644
--- a/packages/svelte/tests/validator/samples/action-on-component/errors.json
+++ b/packages/svelte/tests/validator/samples/action-on-component/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-component-directive",
+		"code": "invalid_component_directive",
 		"message": "This type of directive is not valid on components",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/animation-duplicate/errors.json b/packages/svelte/tests/validator/samples/animation-duplicate/errors.json
index 2a1ba6b5ac..03229646be 100644
--- a/packages/svelte/tests/validator/samples/animation-duplicate/errors.json
+++ b/packages/svelte/tests/validator/samples/animation-duplicate/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "duplicate-animation",
+		"code": "animation_duplicate",
 		"message": "An element can only have one 'animate' directive",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/animation-not-in-each/errors.json b/packages/svelte/tests/validator/samples/animation-not-in-each/errors.json
index d296c8994d..2b5f73585d 100644
--- a/packages/svelte/tests/validator/samples/animation-not-in-each/errors.json
+++ b/packages/svelte/tests/validator/samples/animation-not-in-each/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-animation",
-		"message": "An element that uses the animate directive must be the immediate child of a keyed each block",
+		"code": "animation_invalid_placement",
+		"message": "An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/animation-not-in-keyed-each/errors.json b/packages/svelte/tests/validator/samples/animation-not-in-keyed-each/errors.json
index 709ad5e196..945376a1b1 100644
--- a/packages/svelte/tests/validator/samples/animation-not-in-keyed-each/errors.json
+++ b/packages/svelte/tests/validator/samples/animation-not-in-keyed-each/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-animation",
-		"message": "An element that uses the animate directive must be used inside a keyed each block. Did you forget to add a key to your each block?",
+		"code": "animation_missing_key",
+		"message": "An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block. Did you forget to add a key to your each block?",
 		"start": {
 			"line": 6,
 			"column": 6
diff --git a/packages/svelte/tests/validator/samples/animation-on-component/errors.json b/packages/svelte/tests/validator/samples/animation-on-component/errors.json
index eabf72bb02..f904517a89 100644
--- a/packages/svelte/tests/validator/samples/animation-on-component/errors.json
+++ b/packages/svelte/tests/validator/samples/animation-on-component/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-component-directive",
+		"code": "invalid_component_directive",
 		"message": "This type of directive is not valid on components",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/animation-siblings/errors.json b/packages/svelte/tests/validator/samples/animation-siblings/errors.json
index 709f7006ce..b6412ebca4 100644
--- a/packages/svelte/tests/validator/samples/animation-siblings/errors.json
+++ b/packages/svelte/tests/validator/samples/animation-siblings/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-animation",
-		"message": "An element that uses the animate directive must be the sole child of a keyed each block",
+		"code": "animation_invalid_placement",
+		"message": "An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block",
 		"start": {
 			"line": 6,
 			"column": 6
diff --git a/packages/svelte/tests/validator/samples/assignment-to-const-2/errors.json b/packages/svelte/tests/validator/samples/assignment-to-const-2/errors.json
index 1b74f51563..e4b6b6b329 100644
--- a/packages/svelte/tests/validator/samples/assignment-to-const-2/errors.json
+++ b/packages/svelte/tests/validator/samples/assignment-to-const-2/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable",
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
 		"start": {
 			"line": 13,
 			"column": 24
diff --git a/packages/svelte/tests/validator/samples/assignment-to-const-3/errors.json b/packages/svelte/tests/validator/samples/assignment-to-const-3/errors.json
index b00dd32495..7c92566f1f 100644
--- a/packages/svelte/tests/validator/samples/assignment-to-const-3/errors.json
+++ b/packages/svelte/tests/validator/samples/assignment-to-const-3/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable",
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
 		"start": {
 			"line": 14,
 			"column": 3
diff --git a/packages/svelte/tests/validator/samples/assignment-to-const-4/errors.json b/packages/svelte/tests/validator/samples/assignment-to-const-4/errors.json
index 1fcfaf2406..e714e99a38 100644
--- a/packages/svelte/tests/validator/samples/assignment-to-const-4/errors.json
+++ b/packages/svelte/tests/validator/samples/assignment-to-const-4/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable",
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
 		"start": {
 			"line": 17,
 			"column": 2
diff --git a/packages/svelte/tests/validator/samples/assignment-to-const-5/errors.json b/packages/svelte/tests/validator/samples/assignment-to-const-5/errors.json
index 9bff01645a..41002cd83e 100644
--- a/packages/svelte/tests/validator/samples/assignment-to-const-5/errors.json
+++ b/packages/svelte/tests/validator/samples/assignment-to-const-5/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable",
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
 		"start": {
 			"line": 3,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/assignment-to-const-7/errors.json b/packages/svelte/tests/validator/samples/assignment-to-const-7/errors.json
index 02e5503b16..01c1aefb7e 100644
--- a/packages/svelte/tests/validator/samples/assignment-to-const-7/errors.json
+++ b/packages/svelte/tests/validator/samples/assignment-to-const-7/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable",
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
 		"start": {
 			"line": 3,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/assignment-to-const/errors.json b/packages/svelte/tests/validator/samples/assignment-to-const/errors.json
index 88d6b728b9..6963a3737b 100644
--- a/packages/svelte/tests/validator/samples/assignment-to-const/errors.json
+++ b/packages/svelte/tests/validator/samples/assignment-to-const/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable",
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
 		"start": {
 			"line": 16,
 			"column": 2
diff --git a/packages/svelte/tests/validator/samples/attribute-expected-equals/errors.json b/packages/svelte/tests/validator/samples/attribute-expected-equals/errors.json
index deb2331622..f3b90628ab 100644
--- a/packages/svelte/tests/validator/samples/attribute-expected-equals/errors.json
+++ b/packages/svelte/tests/validator/samples/attribute-expected-equals/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "expected-token",
+		"code": "expected_token",
 		"message": "Expected token =",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/attribute-invalid-name-2/errors.json b/packages/svelte/tests/validator/samples/attribute-invalid-name-2/errors.json
index 0e4afb3009..f99b36ff36 100644
--- a/packages/svelte/tests/validator/samples/attribute-invalid-name-2/errors.json
+++ b/packages/svelte/tests/validator/samples/attribute-invalid-name-2/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-attribute-name",
+		"code": "invalid_attribute_name",
 		"message": "'3aa' is not a valid attribute name",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/attribute-invalid-name-3/errors.json b/packages/svelte/tests/validator/samples/attribute-invalid-name-3/errors.json
index c13a5c5b90..7c49600412 100644
--- a/packages/svelte/tests/validator/samples/attribute-invalid-name-3/errors.json
+++ b/packages/svelte/tests/validator/samples/attribute-invalid-name-3/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-attribute-name",
+		"code": "invalid_attribute_name",
 		"message": "'a*a' is not a valid attribute name",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/attribute-invalid-name-4/errors.json b/packages/svelte/tests/validator/samples/attribute-invalid-name-4/errors.json
index 4cccb34b28..693c080dd1 100644
--- a/packages/svelte/tests/validator/samples/attribute-invalid-name-4/errors.json
+++ b/packages/svelte/tests/validator/samples/attribute-invalid-name-4/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-attribute-name",
+		"code": "invalid_attribute_name",
 		"message": "'-a' is not a valid attribute name",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/attribute-invalid-name-5/errors.json b/packages/svelte/tests/validator/samples/attribute-invalid-name-5/errors.json
index b99bb946ae..4a5b59bbe8 100644
--- a/packages/svelte/tests/validator/samples/attribute-invalid-name-5/errors.json
+++ b/packages/svelte/tests/validator/samples/attribute-invalid-name-5/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-attribute-name",
+		"code": "invalid_attribute_name",
 		"message": "'a;' is not a valid attribute name",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/attribute-invalid-name/errors.json b/packages/svelte/tests/validator/samples/attribute-invalid-name/errors.json
index 5b674a6f7d..6e9e2dc0f1 100644
--- a/packages/svelte/tests/validator/samples/attribute-invalid-name/errors.json
+++ b/packages/svelte/tests/validator/samples/attribute-invalid-name/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-attribute-name",
+		"code": "invalid_attribute_name",
 		"message": "'}' is not a valid attribute name",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/binding-await-catch/errors.json b/packages/svelte/tests/validator/samples/binding-await-catch/errors.json
index 8cdef47534..4da88c4576 100644
--- a/packages/svelte/tests/validator/samples/binding-await-catch/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-await-catch/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid binding to const variable ($derived values, let: directives, :then/:catch variables and @const declarations count as const)",
-		"start": { "line": 6, "column": 9 },
-		"end": { "line": 6, "column": 27 }
+		"code": "invalid_binding",
+		"message": "Cannot bind to constant",
+		"start": {
+			"line": 6,
+			"column": 9
+		},
+		"end": {
+			"line": 6,
+			"column": 27
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/binding-await-then-2/errors.json b/packages/svelte/tests/validator/samples/binding-await-then-2/errors.json
index 050d02f42b..a5c222822c 100644
--- a/packages/svelte/tests/validator/samples/binding-await-then-2/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-await-then-2/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid binding to const variable ($derived values, let: directives, :then/:catch variables and @const declarations count as const)",
-		"start": { "line": 6, "column": 9 },
-		"end": { "line": 6, "column": 19 }
+		"code": "invalid_binding",
+		"message": "Cannot bind to constant",
+		"start": {
+			"line": 6,
+			"column": 9
+		},
+		"end": {
+			"line": 6,
+			"column": 19
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/binding-await-then/errors.json b/packages/svelte/tests/validator/samples/binding-await-then/errors.json
index ec6467441e..69675cf0e7 100644
--- a/packages/svelte/tests/validator/samples/binding-await-then/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-await-then/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid binding to const variable ($derived values, let: directives, :then/:catch variables and @const declarations count as const)",
-		"start": { "line": 5, "column": 9 },
-		"end": { "line": 5, "column": 19 }
+		"code": "invalid_binding",
+		"message": "Cannot bind to constant",
+		"start": {
+			"line": 5,
+			"column": 9
+		},
+		"end": {
+			"line": 5,
+			"column": 19
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/binding-const/errors.json b/packages/svelte/tests/validator/samples/binding-const/errors.json
index cf3522eef1..d2f8b1a8b3 100644
--- a/packages/svelte/tests/validator/samples/binding-const/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-const/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid binding to const variable",
+		"code": "invalid_binding",
+		"message": "Cannot bind to constant",
 		"start": {
 			"line": 5,
 			"column": 7
diff --git a/packages/svelte/tests/validator/samples/binding-dimensions-svg/errors.json b/packages/svelte/tests/validator/samples/binding-dimensions-svg/errors.json
index b1969bfd5f..4d3819453c 100644
--- a/packages/svelte/tests/validator/samples/binding-dimensions-svg/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-dimensions-svg/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'offsetWidth' binding can only be used with non-<svg> elements. Use 'clientWidth' for <svg> instead",
+		"code": "bind_invalid_target",
+		"message": "`bind:offsetWidth` can only be used with non-<svg> elements. Use 'clientWidth' for <svg> instead",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/binding-input-checked/errors.json b/packages/svelte/tests/validator/samples/binding-input-checked/errors.json
index 50abdd6df9..574b25e06f 100644
--- a/packages/svelte/tests/validator/samples/binding-input-checked/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-input-checked/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'checked' binding can only be used with <input type=\"checkbox\">",
+		"code": "bind_invalid_target",
+		"message": "`bind:checked` can only be used with <input type=\"checkbox\">",
 		"start": {
 			"line": 5,
 			"column": 7
diff --git a/packages/svelte/tests/validator/samples/binding-input-type-boolean/errors.json b/packages/svelte/tests/validator/samples/binding-input-type-boolean/errors.json
index 6a4807a7b1..87a3f6f8ea 100644
--- a/packages/svelte/tests/validator/samples/binding-input-type-boolean/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-input-type-boolean/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-type-attribute",
+		"code": "invalid_type_attribute",
 		"message": "'type' attribute must be a static text value if input uses two-way binding",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/binding-invalid-foreign-namespace/errors.json b/packages/svelte/tests/validator/samples/binding-invalid-foreign-namespace/errors.json
index 7b6d4f51db..de997e5394 100644
--- a/packages/svelte/tests/validator/samples/binding-invalid-foreign-namespace/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-invalid-foreign-namespace/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'value' is not a valid binding. Foreign elements only support bind:this",
+		"code": "bind_invalid_detailed",
+		"message": "`bind:value` is not a valid binding. Foreign elements only support `bind:this`",
 		"start": {
 			"line": 6,
 			"column": 7
diff --git a/packages/svelte/tests/validator/samples/binding-invalid-on-element-2/errors.json b/packages/svelte/tests/validator/samples/binding-invalid-on-element-2/errors.json
index c379a94d5a..92111a4ec2 100644
--- a/packages/svelte/tests/validator/samples/binding-invalid-on-element-2/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-invalid-on-element-2/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'open' binding can only be used with <details>",
+		"code": "bind_invalid_target",
+		"message": "`bind:open` can only be used with <details>",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/binding-invalid-on-element/errors.json b/packages/svelte/tests/validator/samples/binding-invalid-on-element/errors.json
index 9898ad8fa5..6626afc1d0 100644
--- a/packages/svelte/tests/validator/samples/binding-invalid-on-element/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-invalid-on-element/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'value' binding can only be used with <input>, <textarea>, <select>",
+		"code": "bind_invalid_target",
+		"message": "`bind:value` can only be used with <input>, <textarea>, <select>",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/binding-invalid-value-global/errors.json b/packages/svelte/tests/validator/samples/binding-invalid-value-global/errors.json
index cff83b012e..82e86887bd 100644
--- a/packages/svelte/tests/validator/samples/binding-invalid-value-global/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-invalid-value-global/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-binding-value",
+		"code": "invalid_binding_value",
 		"message": "Can only bind to state or props",
 		"start": {
 			"line": 4,
diff --git a/packages/svelte/tests/validator/samples/binding-invalid-value/errors.json b/packages/svelte/tests/validator/samples/binding-invalid-value/errors.json
index a6e53e4e36..34026c52ac 100644
--- a/packages/svelte/tests/validator/samples/binding-invalid-value/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-invalid-value/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-binding-value",
+		"code": "invalid_binding_value",
 		"message": "Can only bind to state or props",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/binding-invalid/errors.json b/packages/svelte/tests/validator/samples/binding-invalid/errors.json
index fdd0ada258..9e0e455eaf 100644
--- a/packages/svelte/tests/validator/samples/binding-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'whatever' is not a valid binding",
+		"code": "bind_invalid",
+		"message": "`bind:whatever` is not a valid binding",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/binding-let/errors.json b/packages/svelte/tests/validator/samples/binding-let/errors.json
index c6c734cf91..88e038bba5 100644
--- a/packages/svelte/tests/validator/samples/binding-let/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-let/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid binding to const variable ($derived values, let: directives, :then/:catch variables and @const declarations count as const)",
+		"code": "invalid_binding",
+		"message": "Cannot bind to constant",
 		"start": {
 			"line": 6,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/binding-select-multiple-dynamic/errors.json b/packages/svelte/tests/validator/samples/binding-select-multiple-dynamic/errors.json
index 95ab7f91d4..b280929333 100644
--- a/packages/svelte/tests/validator/samples/binding-select-multiple-dynamic/errors.json
+++ b/packages/svelte/tests/validator/samples/binding-select-multiple-dynamic/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-multiple-attribute",
+		"code": "invalid_multiple_attribute",
 		"message": "'multiple' attribute must be static if select uses two-way binding",
 		"start": {
 			"line": 6,
diff --git a/packages/svelte/tests/validator/samples/component-event-modifiers-invalid/errors.json b/packages/svelte/tests/validator/samples/component-event-modifiers-invalid/errors.json
index 3edd0059a3..14288a1385 100644
--- a/packages/svelte/tests/validator/samples/component-event-modifiers-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/component-event-modifiers-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
 		"message": "Event modifiers other than 'once' can only be used on DOM elements",
-		"code": "invalid-event-modifier",
+		"code": "invalid_component_event_modifier",
 		"start": {
 			"line": 6,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/component-invalid-style-directive/errors.json b/packages/svelte/tests/validator/samples/component-invalid-style-directive/errors.json
index 6c37a888ff..3eeb050cdb 100644
--- a/packages/svelte/tests/validator/samples/component-invalid-style-directive/errors.json
+++ b/packages/svelte/tests/validator/samples/component-invalid-style-directive/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-component-directive",
+		"code": "invalid_component_directive",
 		"message": "This type of directive is not valid on components",
-		"start": { "line": 7, "column": 19 },
-		"end": { "line": 7, "column": 36 }
+		"start": {
+			"line": 7,
+			"column": 19
+		},
+		"end": {
+			"line": 7,
+			"column": 36
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/component-slot-default-reserved/errors.json b/packages/svelte/tests/validator/samples/component-slot-default-reserved/errors.json
index 5347d4737f..190c4d81a2 100644
--- a/packages/svelte/tests/validator/samples/component-slot-default-reserved/errors.json
+++ b/packages/svelte/tests/validator/samples/component-slot-default-reserved/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-slot-name",
-		"message": "default is a reserved word — it cannot be used as a slot name",
+		"code": "invalid_slot_name_default",
+		"message": "`default` is a reserved word — it cannot be used as a slot name",
 		"start": {
 			"line": 1,
 			"column": 6
diff --git a/packages/svelte/tests/validator/samples/component-slot-dynamic-attribute/errors.json b/packages/svelte/tests/validator/samples/component-slot-dynamic-attribute/errors.json
index 9194e8aa9b..238bd48d90 100644
--- a/packages/svelte/tests/validator/samples/component-slot-dynamic-attribute/errors.json
+++ b/packages/svelte/tests/validator/samples/component-slot-dynamic-attribute/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-slot-attribute",
+		"code": "invalid_slot_attribute",
 		"message": "slot attribute must be a static value",
 		"start": {
 			"line": 6,
diff --git a/packages/svelte/tests/validator/samples/component-slot-dynamic/errors.json b/packages/svelte/tests/validator/samples/component-slot-dynamic/errors.json
index 963cb1f40d..0c08ef2dad 100644
--- a/packages/svelte/tests/validator/samples/component-slot-dynamic/errors.json
+++ b/packages/svelte/tests/validator/samples/component-slot-dynamic/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-slot-name",
+		"code": "invalid_slot_name",
 		"message": "slot attribute must be a static value",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/component-slotted-custom-element-2/errors.json b/packages/svelte/tests/validator/samples/component-slotted-custom-element-2/errors.json
index da10838a69..63960b846b 100644
--- a/packages/svelte/tests/validator/samples/component-slotted-custom-element-2/errors.json
+++ b/packages/svelte/tests/validator/samples/component-slotted-custom-element-2/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-slot-placement",
+		"code": "invalid_slot_placement",
 		"message": "Element with a slot='...' attribute must be a child of a component or a descendant of a custom element",
-		"start": { "line": 10, "column": 9 },
-		"end": { "line": 10, "column": 19 }
+		"start": {
+			"line": 10,
+			"column": 9
+		},
+		"end": {
+			"line": 10,
+			"column": 19
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/component-slotted-each-block/errors.json b/packages/svelte/tests/validator/samples/component-slotted-each-block/errors.json
index 12d2407540..b04ef9e4aa 100644
--- a/packages/svelte/tests/validator/samples/component-slotted-each-block/errors.json
+++ b/packages/svelte/tests/validator/samples/component-slotted-each-block/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-slot-placement",
+		"code": "invalid_slot_placement",
 		"message": "Element with a slot='...' attribute must be a child of a component or a descendant of a custom element",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/component-slotted-if-block/errors.json b/packages/svelte/tests/validator/samples/component-slotted-if-block/errors.json
index 12d2407540..b04ef9e4aa 100644
--- a/packages/svelte/tests/validator/samples/component-slotted-if-block/errors.json
+++ b/packages/svelte/tests/validator/samples/component-slotted-if-block/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-slot-placement",
+		"code": "invalid_slot_placement",
 		"message": "Element with a slot='...' attribute must be a child of a component or a descendant of a custom element",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/const-tag-conflict-1/errors.json b/packages/svelte/tests/validator/samples/const-tag-conflict-1/errors.json
index 78beca08c7..07c6cbadca 100644
--- a/packages/svelte/tests/validator/samples/const-tag-conflict-1/errors.json
+++ b/packages/svelte/tests/validator/samples/const-tag-conflict-1/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "duplicate-declaration",
-		"message": "'a' has already been declared",
-		"start": { "line": 7, "column": 10 },
-		"end": { "line": 7, "column": 11 }
+		"code": "duplicate_declaration",
+		"message": "`a` has already been declared",
+		"start": {
+			"line": 7,
+			"column": 10
+		},
+		"end": {
+			"line": 7,
+			"column": 11
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/const-tag-conflict-2/errors.json b/packages/svelte/tests/validator/samples/const-tag-conflict-2/errors.json
index dc3c1322c7..543f2a0217 100644
--- a/packages/svelte/tests/validator/samples/const-tag-conflict-2/errors.json
+++ b/packages/svelte/tests/validator/samples/const-tag-conflict-2/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "duplicate-declaration",
-		"message": "'item' has already been declared",
-		"start": { "line": 6, "column": 10 },
-		"end": { "line": 6, "column": 14 }
+		"code": "duplicate_declaration",
+		"message": "`item` has already been declared",
+		"start": {
+			"line": 6,
+			"column": 10
+		},
+		"end": {
+			"line": 6,
+			"column": 14
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/const-tag-placement-1/errors.json b/packages/svelte/tests/validator/samples/const-tag-placement-1/errors.json
index 66ff86663f..4db0868c16 100644
--- a/packages/svelte/tests/validator/samples/const-tag-placement-1/errors.json
+++ b/packages/svelte/tests/validator/samples/const-tag-placement-1/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-placement",
+		"code": "invalid_const_placement",
 		"message": "{@const} must be the immediate child of {#snippet}, {#if}, {:else if}, {:else}, {#each}, {:then}, {:catch}, <svelte:fragment> or <Component>",
-		"start": { "line": 5, "column": 0 },
-		"end": { "line": 5, "column": 18 }
+		"start": {
+			"line": 5,
+			"column": 0
+		},
+		"end": {
+			"line": 5,
+			"column": 18
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/const-tag-placement-2/errors.json b/packages/svelte/tests/validator/samples/const-tag-placement-2/errors.json
index 6c14fdbaf7..33b24f369e 100644
--- a/packages/svelte/tests/validator/samples/const-tag-placement-2/errors.json
+++ b/packages/svelte/tests/validator/samples/const-tag-placement-2/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-placement",
+		"code": "invalid_const_placement",
 		"message": "{@const} must be the immediate child of {#snippet}, {#if}, {:else if}, {:else}, {#each}, {:then}, {:catch}, <svelte:fragment> or <Component>",
-		"start": { "line": 7, "column": 4 },
-		"end": { "line": 7, "column": 18 }
+		"start": {
+			"line": 7,
+			"column": 4
+		},
+		"end": {
+			"line": 7,
+			"column": 18
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/const-tag-readonly-1/errors.json b/packages/svelte/tests/validator/samples/const-tag-readonly-1/errors.json
index abe738f6cf..42f9deb4df 100644
--- a/packages/svelte/tests/validator/samples/const-tag-readonly-1/errors.json
+++ b/packages/svelte/tests/validator/samples/const-tag-readonly-1/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid assignment to const variable ($derived values, let: directives, :then/:catch variables and @const declarations count as const)",
-		"start": { "line": 7, "column": 26 },
-		"end": { "line": 7, "column": 30 }
+		"code": "invalid_assignment",
+		"message": "Cannot assign to constant",
+		"start": {
+			"line": 7,
+			"column": 26
+		},
+		"end": {
+			"line": 7,
+			"column": 30
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/const-tag-readonly-2/errors.json b/packages/svelte/tests/validator/samples/const-tag-readonly-2/errors.json
index a8c60a8b56..9f0d1d51e8 100644
--- a/packages/svelte/tests/validator/samples/const-tag-readonly-2/errors.json
+++ b/packages/svelte/tests/validator/samples/const-tag-readonly-2/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-const-assignment",
-		"message": "Invalid binding to const variable ($derived values, let: directives, :then/:catch variables and @const declarations count as const)",
-		"start": { "line": 7, "column": 9 },
-		"end": { "line": 7, "column": 23 }
+		"code": "invalid_binding",
+		"message": "Cannot bind to constant",
+		"start": {
+			"line": 7,
+			"column": 9
+		},
+		"end": {
+			"line": 7,
+			"column": 23
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/contenteditable-dynamic/errors.json b/packages/svelte/tests/validator/samples/contenteditable-dynamic/errors.json
index 27cc3e98c7..285a6f921d 100644
--- a/packages/svelte/tests/validator/samples/contenteditable-dynamic/errors.json
+++ b/packages/svelte/tests/validator/samples/contenteditable-dynamic/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "dynamic-contenteditable-attribute",
+		"code": "dynamic_contenteditable_attribute",
 		"message": "'contenteditable' attribute cannot be dynamic if element uses two-way binding",
 		"start": {
 			"line": 11,
diff --git a/packages/svelte/tests/validator/samples/contenteditable-missing/errors.json b/packages/svelte/tests/validator/samples/contenteditable-missing/errors.json
index 24a072dac8..616c45021b 100644
--- a/packages/svelte/tests/validator/samples/contenteditable-missing/errors.json
+++ b/packages/svelte/tests/validator/samples/contenteditable-missing/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "missing-contenteditable-attribute",
+		"code": "missing_contenteditable_attribute",
 		"message": "'contenteditable' attribute is required for textContent, innerHTML and innerText two-way bindings",
 		"start": {
 			"line": 4,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-1/errors.json b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-1/errors.json
index d49bf7437a..eccbf62094 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-1/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-1/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-selector",
+		"code": "invalid_css_selector",
 		"message": "Invalid selector",
 		"start": {
 			"line": 10,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-2/errors.json b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-2/errors.json
index 2fdf3e96d1..37cfb99c87 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-2/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-2/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-selector",
+		"code": "invalid_css_selector",
 		"message": "Invalid selector",
 		"start": {
 			"line": 8,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-3/errors.json b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-3/errors.json
index b355260623..74fd26a692 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-3/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-3/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-selector",
+		"code": "invalid_css_selector",
 		"message": "Invalid selector",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-4/errors.json b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-4/errors.json
index aab0a130c7..24f83fee73 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-4/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-combinator-selector-4/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-selector",
+		"code": "invalid_css_selector",
 		"message": "Invalid selector",
 		"start": {
 			"line": 4,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-placement-2/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-placement-2/errors.json
index 1d359c01b3..1a11759e43 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-placement-2/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-placement-2/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-placement",
+		"code": "invalid_css_global_placement",
 		"message": ":global(...) can be at the start or end of a selector sequence, but not in the middle",
 		"start": {
 			"line": 8,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-placement-3/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-placement-3/errors.json
index 53e24d8d81..14fe638188 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-placement-3/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-placement-3/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-placement",
+		"code": "invalid_css_global_placement",
 		"message": ":global(...) can be at the start or end of a selector sequence, but not in the middle",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-placement-4/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-placement-4/errors.json
index fcc96361dd..539d91fb4d 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-placement-4/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-placement-4/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector-list",
+		"code": "invalid_css_global_selector_list",
 		"message": ":global(...) must not contain type or universal selectors when used in a compound selector",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-placement-5/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-placement-5/errors.json
index fbbdefb60e..a3a6a13b77 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-placement-5/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-placement-5/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector-list",
+		"code": "invalid_css_global_selector_list",
 		"message": ":global(...) must not contain type or universal selectors when used in a compound selector",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-placement-6/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-placement-6/errors.json
index 2b03fa8c2b..008a8ec266 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-placement-6/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-placement-6/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector-list",
+		"code": "invalid_css_global_selector_list",
 		"message": ":global(...) must not contain type or universal selectors when used in a compound selector",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-placement/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-placement/errors.json
index 7ba32a53fb..a2c76f2366 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-placement/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-placement/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-placement",
+		"code": "invalid_css_global_placement",
 		"message": ":global(...) can be at the start or end of a selector sequence, but not in the middle",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector-2/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector-2/errors.json
index 36b3ec4753..e6952aca16 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector-2/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector-2/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector",
+		"code": "invalid_css_global_selector",
 		"message": ":global(...) must contain exactly one selector",
 		"start": {
 			"line": 11,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector-3/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector-3/errors.json
index f4a75dcb17..5eaaee69d3 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector-3/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector-3/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector",
+		"code": "invalid_css_global_selector",
 		"message": ":global(...) must contain exactly one selector",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector-4/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector-4/errors.json
index a6ae2d595b..d3f84026d6 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector-4/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector-4/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector",
+		"code": "invalid_css_global_selector",
 		"message": ":global(...) must contain exactly one selector",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector-5/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector-5/errors.json
index 5ac729aa23..06ad62ef10 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector-5/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector-5/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector",
+		"code": "invalid_css_global_selector",
 		"message": ":global(...) must contain exactly one selector",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector-6/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector-6/errors.json
index 5ac729aa23..06ad62ef10 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector-6/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector-6/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector",
+		"code": "invalid_css_global_selector",
 		"message": ":global(...) must contain exactly one selector",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector-list/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector-list/errors.json
index 25399f6369..41fc6235e2 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector-list/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector-list/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector-list",
+		"code": "invalid_css_global_selector_list",
 		"message": ":global(...) must not contain type or universal selectors when used in a compound selector",
 		"start": {
 			"line": 20,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-global-selector/errors.json b/packages/svelte/tests/validator/samples/css-invalid-global-selector/errors.json
index 40bae7d4d7..50dfec051b 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-global-selector/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-global-selector/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-global-selector",
+		"code": "invalid_css_global_selector",
 		"message": ":global(...) must contain exactly one selector",
 		"start": {
 			"line": 11,
diff --git a/packages/svelte/tests/validator/samples/css-invalid-type-selector-placement/errors.json b/packages/svelte/tests/validator/samples/css-invalid-type-selector-placement/errors.json
index f58f92d6ee..d5a2602fb6 100644
--- a/packages/svelte/tests/validator/samples/css-invalid-type-selector-placement/errors.json
+++ b/packages/svelte/tests/validator/samples/css-invalid-type-selector-placement/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-type-selector-placement",
+		"code": "invalid_css_type_selector_placement",
 		"message": ":global(...) must not be followed with a type selector",
 		"start": {
 			"line": 17,
diff --git a/packages/svelte/tests/validator/samples/css-mismatched-quotes/errors.json b/packages/svelte/tests/validator/samples/css-mismatched-quotes/errors.json
index 6919f50ce9..cf5ade9b0e 100644
--- a/packages/svelte/tests/validator/samples/css-mismatched-quotes/errors.json
+++ b/packages/svelte/tests/validator/samples/css-mismatched-quotes/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "unexpected-eof",
+		"code": "unexpected_eof",
 		"message": "Unexpected end of input",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/debug-invalid-args/errors.json b/packages/svelte/tests/validator/samples/debug-invalid-args/errors.json
index b21af2c438..40d459912c 100644
--- a/packages/svelte/tests/validator/samples/debug-invalid-args/errors.json
+++ b/packages/svelte/tests/validator/samples/debug-invalid-args/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-debug",
+		"code": "invalid_debug",
 		"message": "{@debug ...} arguments must be identifiers, not arbitrary expressions",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/default-export-anonymous-class/errors.json b/packages/svelte/tests/validator/samples/default-export-anonymous-class/errors.json
index 064c5a4f5a..4615556188 100644
--- a/packages/svelte/tests/validator/samples/default-export-anonymous-class/errors.json
+++ b/packages/svelte/tests/validator/samples/default-export-anonymous-class/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "default-export",
+		"code": "default_export",
 		"message": "A component cannot have a default export",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/default-export-anonymous-function/errors.json b/packages/svelte/tests/validator/samples/default-export-anonymous-function/errors.json
index 7e20c7c9d4..652aff0e54 100644
--- a/packages/svelte/tests/validator/samples/default-export-anonymous-function/errors.json
+++ b/packages/svelte/tests/validator/samples/default-export-anonymous-function/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "default-export",
+		"code": "default_export",
 		"message": "A component cannot have a default export",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/default-export/errors.json b/packages/svelte/tests/validator/samples/default-export/errors.json
index 6131408037..5b786d2222 100644
--- a/packages/svelte/tests/validator/samples/default-export/errors.json
+++ b/packages/svelte/tests/validator/samples/default-export/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "default-export",
+		"code": "default_export",
 		"message": "A component cannot have a default export",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/directive-non-expression/errors.json b/packages/svelte/tests/validator/samples/directive-non-expression/errors.json
index 4d36ab28b3..f7a825454e 100644
--- a/packages/svelte/tests/validator/samples/directive-non-expression/errors.json
+++ b/packages/svelte/tests/validator/samples/directive-non-expression/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-directive-value",
+		"code": "invalid_directive_value",
 		"message": "Directive value must be a JavaScript expression enclosed in curly braces",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/dollar-dollar-global-in-markup/errors.json b/packages/svelte/tests/validator/samples/dollar-dollar-global-in-markup/errors.json
index 5624217e87..630f8c5ea2 100644
--- a/packages/svelte/tests/validator/samples/dollar-dollar-global-in-markup/errors.json
+++ b/packages/svelte/tests/validator/samples/dollar-dollar-global-in-markup/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "illegal-global",
-		"message": "$$billsyall is an illegal variable name. To reference a global variable called $$billsyall, use globalThis.$$billsyall",
+		"code": "illegal_global",
+		"message": "`$$billsyall` is an illegal variable name. To reference a global variable called `$$billsyall`, use `globalThis.$$billsyall`",
 		"start": {
 			"line": 1,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/dollar-dollar-global-in-script/errors.json b/packages/svelte/tests/validator/samples/dollar-dollar-global-in-script/errors.json
index fac768b195..5876bcae80 100644
--- a/packages/svelte/tests/validator/samples/dollar-dollar-global-in-script/errors.json
+++ b/packages/svelte/tests/validator/samples/dollar-dollar-global-in-script/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "illegal-global",
-		"message": "$$billsyall is an illegal variable name. To reference a global variable called $$billsyall, use globalThis.$$billsyall",
+		"code": "illegal_global",
+		"message": "`$$billsyall` is an illegal variable name. To reference a global variable called `$$billsyall`, use `globalThis.$$billsyall`",
 		"start": {
 			"line": 2,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/dollar-global-in-markup/errors.json b/packages/svelte/tests/validator/samples/dollar-global-in-markup/errors.json
index 847dacbca8..1623518ca0 100644
--- a/packages/svelte/tests/validator/samples/dollar-global-in-markup/errors.json
+++ b/packages/svelte/tests/validator/samples/dollar-global-in-markup/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "illegal-global",
-		"message": "$ is an illegal variable name. To reference a global variable called $, use globalThis.$",
+		"code": "illegal_global",
+		"message": "`$` is an illegal variable name. To reference a global variable called `$`, use `globalThis.$`",
 		"start": {
 			"line": 1,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/dollar-global-in-script/errors.json b/packages/svelte/tests/validator/samples/dollar-global-in-script/errors.json
index b924a535d8..5d33dc3d83 100644
--- a/packages/svelte/tests/validator/samples/dollar-global-in-script/errors.json
+++ b/packages/svelte/tests/validator/samples/dollar-global-in-script/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "illegal-global",
-		"message": "$ is an illegal variable name. To reference a global variable called $, use globalThis.$",
+		"code": "illegal_global",
+		"message": "`$` is an illegal variable name. To reference a global variable called `$`, use `globalThis.$`",
 		"start": {
 			"line": 2,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/dynamic-element-invalid-tag/errors.json b/packages/svelte/tests/validator/samples/dynamic-element-invalid-tag/errors.json
index 752d26e1b3..ccd34029d2 100644
--- a/packages/svelte/tests/validator/samples/dynamic-element-invalid-tag/errors.json
+++ b/packages/svelte/tests/validator/samples/dynamic-element-invalid-tag/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-svelte-element-definition",
+		"code": "invalid_svelte_element_definition",
 		"message": "Invalid element definition — must be an {expression}",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/dynamic-element-missing-tag/errors.json b/packages/svelte/tests/validator/samples/dynamic-element-missing-tag/errors.json
index 58c8af5c66..d31bd1964c 100644
--- a/packages/svelte/tests/validator/samples/dynamic-element-missing-tag/errors.json
+++ b/packages/svelte/tests/validator/samples/dynamic-element-missing-tag/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "missing-svelte-element-definition",
-		"message": "<svelte:element> must have a 'this' attribute",
+		"code": "missing_svelte_element_definition",
+		"message": "`<svelte:element>` must have a 'this' attribute",
 		"start": {
 			"line": 2,
 			"column": 1
diff --git a/packages/svelte/tests/validator/samples/dynamic-element-this/errors.json b/packages/svelte/tests/validator/samples/dynamic-element-this/errors.json
index 4efad529ff..78ee8835be 100644
--- a/packages/svelte/tests/validator/samples/dynamic-element-this/errors.json
+++ b/packages/svelte/tests/validator/samples/dynamic-element-this/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "unexpected-reserved-word",
+		"code": "unexpected_reserved_word",
 		"message": "'this' is a reserved word in JavaScript and cannot be used here",
 		"start": {
 			"line": 2,
diff --git a/packages/svelte/tests/validator/samples/each-block-destructured-object-rest-comma-after/errors.json b/packages/svelte/tests/validator/samples/each-block-destructured-object-rest-comma-after/errors.json
index 13c3d150db..62494b230e 100644
--- a/packages/svelte/tests/validator/samples/each-block-destructured-object-rest-comma-after/errors.json
+++ b/packages/svelte/tests/validator/samples/each-block-destructured-object-rest-comma-after/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "js-parse-error",
+		"code": "js_parse_error",
 		"message": "Comma is not permitted after the rest element",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured-object/errors.json b/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured-object/errors.json
index 3cb3bbe0db..7800f62247 100644
--- a/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured-object/errors.json
+++ b/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured-object/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "js-parse-error",
+		"code": "js_parse_error",
 		"message": "Unexpected keyword 'case'",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured/errors.json b/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured/errors.json
index 888bc761ac..42c0eb3883 100644
--- a/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured/errors.json
+++ b/packages/svelte/tests/validator/samples/each-block-invalid-context-destructured/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "js-parse-error",
+		"code": "js_parse_error",
 		"message": "Unexpected token",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/each-block-invalid-context/errors.json b/packages/svelte/tests/validator/samples/each-block-invalid-context/errors.json
index 72c68836a3..7b6d28004b 100644
--- a/packages/svelte/tests/validator/samples/each-block-invalid-context/errors.json
+++ b/packages/svelte/tests/validator/samples/each-block-invalid-context/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "unexpected-reserved-word",
+		"code": "unexpected_reserved_word",
 		"message": "'case' is a reserved word in JavaScript and cannot be used here",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/event-attribute/errors.json b/packages/svelte/tests/validator/samples/event-attribute/errors.json
index 28a8f9f11a..7204ea671b 100644
--- a/packages/svelte/tests/validator/samples/event-attribute/errors.json
+++ b/packages/svelte/tests/validator/samples/event-attribute/errors.json
@@ -1,7 +1,7 @@
 [
 	{
 		"message": "Event attribute must be a JavaScript expression, not a string",
-		"code": "invalid-event-attribute-value",
+		"code": "invalid_event_attribute_value",
 		"start": {
 			"line": 4,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/event-modifiers-invalid-nonpassive/errors.json b/packages/svelte/tests/validator/samples/event-modifiers-invalid-nonpassive/errors.json
index 0230959777..c53951cb67 100644
--- a/packages/svelte/tests/validator/samples/event-modifiers-invalid-nonpassive/errors.json
+++ b/packages/svelte/tests/validator/samples/event-modifiers-invalid-nonpassive/errors.json
@@ -1,7 +1,7 @@
 [
 	{
 		"message": "The 'passive' and 'nonpassive' modifiers cannot be used together",
-		"code": "invalid-event-modifier-combination",
+		"code": "invalid_event_modifier_combination",
 		"start": {
 			"line": 1,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/event-modifiers-invalid-passive/errors.json b/packages/svelte/tests/validator/samples/event-modifiers-invalid-passive/errors.json
index db8289791a..d1def4dcb3 100644
--- a/packages/svelte/tests/validator/samples/event-modifiers-invalid-passive/errors.json
+++ b/packages/svelte/tests/validator/samples/event-modifiers-invalid-passive/errors.json
@@ -1,7 +1,7 @@
 [
 	{
 		"message": "The 'passive' and 'preventDefault' modifiers cannot be used together",
-		"code": "invalid-event-modifier-combination",
+		"code": "invalid_event_modifier_combination",
 		"start": {
 			"line": 1,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/event-modifiers-invalid/errors.json b/packages/svelte/tests/validator/samples/event-modifiers-invalid/errors.json
index b398cea5e4..178a5b5543 100644
--- a/packages/svelte/tests/validator/samples/event-modifiers-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/event-modifiers-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
 		"message": "Valid event modifiers are preventDefault, stopPropagation, stopImmediatePropagation, capture, once, passive, nonpassive, self or trusted",
-		"code": "invalid-event-modifier",
+		"code": "invalid_event_modifier",
 		"start": {
 			"line": 1,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/html-block-in-attribute/errors.json b/packages/svelte/tests/validator/samples/html-block-in-attribute/errors.json
index 6c7237f030..5eedfb8971 100644
--- a/packages/svelte/tests/validator/samples/html-block-in-attribute/errors.json
+++ b/packages/svelte/tests/validator/samples/html-block-in-attribute/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-tag-placement",
+		"code": "invalid_tag_placement",
 		"message": "{@html ...} tag cannot be in attribute value",
-		"start": { "line": 1, "column": 12 },
-		"end": { "line": 1, "column": 12 }
+		"start": {
+			"line": 1,
+			"column": 12
+		},
+		"end": {
+			"line": 1,
+			"column": 12
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/html-block-in-textarea/errors.json b/packages/svelte/tests/validator/samples/html-block-in-textarea/errors.json
index 8d98066d55..c0e5d0e66a 100644
--- a/packages/svelte/tests/validator/samples/html-block-in-textarea/errors.json
+++ b/packages/svelte/tests/validator/samples/html-block-in-textarea/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-tag-placement",
+		"code": "invalid_tag_placement",
 		"message": "{@html ...} tag cannot be inside <textarea>",
-		"start": { "line": 2, "column": 1 },
-		"end": { "line": 2, "column": 1 }
+		"start": {
+			"line": 2,
+			"column": 1
+		},
+		"end": {
+			"line": 2,
+			"column": 1
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/illegal-variable-declaration/errors.json b/packages/svelte/tests/validator/samples/illegal-variable-declaration/errors.json
index 788784d1d8..d55986ec5a 100644
--- a/packages/svelte/tests/validator/samples/illegal-variable-declaration/errors.json
+++ b/packages/svelte/tests/validator/samples/illegal-variable-declaration/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "illegal-variable-declaration",
-		"message": "Cannot declare same variable name which is imported inside <script context=\"module\">",
+		"code": "illegal_variable_declaration",
+		"message": "Cannot declare same variable name which is imported inside `<script context=\"module\">`",
 		"start": {
 			"line": 12,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/invalid-empty-css-declaration/errors.json b/packages/svelte/tests/validator/samples/invalid-empty-css-declaration/errors.json
index 2ceb3a3694..299cb2fff5 100644
--- a/packages/svelte/tests/validator/samples/invalid-empty-css-declaration/errors.json
+++ b/packages/svelte/tests/validator/samples/invalid-empty-css-declaration/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-css-declaration",
+		"code": "invalid_css_declaration",
 		"message": "Declaration cannot be empty",
 		"start": {
 			"line": 5,
diff --git a/packages/svelte/tests/validator/samples/invalid-node-placement-2/errors.json b/packages/svelte/tests/validator/samples/invalid-node-placement-2/errors.json
index fdd8af19c2..99fce66db0 100644
--- a/packages/svelte/tests/validator/samples/invalid-node-placement-2/errors.json
+++ b/packages/svelte/tests/validator/samples/invalid-node-placement-2/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-node-placement",
+		"code": "invalid_node_placement",
 		"message": "<div> is invalid inside <p>",
 		"start": {
 			"line": 4,
diff --git a/packages/svelte/tests/validator/samples/invalid-node-placement/errors.json b/packages/svelte/tests/validator/samples/invalid-node-placement/errors.json
index 259b8f613b..1b43c778ee 100644
--- a/packages/svelte/tests/validator/samples/invalid-node-placement/errors.json
+++ b/packages/svelte/tests/validator/samples/invalid-node-placement/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-node-placement",
+		"code": "invalid_node_placement",
 		"message": "<a> is invalid inside <a>",
 		"start": {
 			"line": 4,
diff --git a/packages/svelte/tests/validator/samples/let-directive/errors.json b/packages/svelte/tests/validator/samples/let-directive/errors.json
index bb239bafa7..5e4138812e 100644
--- a/packages/svelte/tests/validator/samples/let-directive/errors.json
+++ b/packages/svelte/tests/validator/samples/let-directive/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-let-directive-placement",
-		"message": "let directive at invalid position",
-		"start": { "line": 6, "column": 15 },
-		"end": { "line": 6, "column": 20 }
+		"code": "invalid_let_directive_placement",
+		"message": "`let:` directive at invalid position",
+		"start": {
+			"line": 6,
+			"column": 15
+		},
+		"end": {
+			"line": 6,
+			"column": 20
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/logic-block-in-attribute/errors.json b/packages/svelte/tests/validator/samples/logic-block-in-attribute/errors.json
index 883fc0e479..c1169837ea 100644
--- a/packages/svelte/tests/validator/samples/logic-block-in-attribute/errors.json
+++ b/packages/svelte/tests/validator/samples/logic-block-in-attribute/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-block-placement",
+		"code": "invalid_block_placement",
 		"message": "{#if ...} block cannot be in attribute value",
-		"start": { "line": 1, "column": 12 },
-		"end": { "line": 1, "column": 12 }
+		"start": {
+			"line": 1,
+			"column": 12
+		},
+		"end": {
+			"line": 1,
+			"column": 12
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/logic-block-in-textarea/errors.json b/packages/svelte/tests/validator/samples/logic-block-in-textarea/errors.json
index a371f9b76b..e9f8a9decf 100644
--- a/packages/svelte/tests/validator/samples/logic-block-in-textarea/errors.json
+++ b/packages/svelte/tests/validator/samples/logic-block-in-textarea/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-block-placement",
+		"code": "invalid_block_placement",
 		"message": "{#each ...} block cannot be inside <textarea>",
-		"start": { "line": 2, "column": 1 },
-		"end": { "line": 2, "column": 1 }
+		"start": {
+			"line": 2,
+			"column": 1
+		},
+		"end": {
+			"line": 2,
+			"column": 1
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/multiple-script-default-context/errors.json b/packages/svelte/tests/validator/samples/multiple-script-default-context/errors.json
index 58eb092928..ab06795527 100644
--- a/packages/svelte/tests/validator/samples/multiple-script-default-context/errors.json
+++ b/packages/svelte/tests/validator/samples/multiple-script-default-context/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-script-element",
-		"message": "A component can have a single top-level <script> element and/or a single top-level <script context=\"module\"> element",
+		"code": "duplicate_script_element",
+		"message": "A component can have a single top-level `<script>` element and/or a single top-level `<script context=\"module\">` element",
 		"start": {
 			"line": 5,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/multiple-script-module-context/errors.json b/packages/svelte/tests/validator/samples/multiple-script-module-context/errors.json
index 58eb092928..ab06795527 100644
--- a/packages/svelte/tests/validator/samples/multiple-script-module-context/errors.json
+++ b/packages/svelte/tests/validator/samples/multiple-script-module-context/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-script-element",
-		"message": "A component can have a single top-level <script> element and/or a single top-level <script context=\"module\"> element",
+		"code": "duplicate_script_element",
+		"message": "A component can have a single top-level `<script>` element and/or a single top-level `<script context=\"module\">` element",
 		"start": {
 			"line": 5,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/namespace-invalid/errors.json b/packages/svelte/tests/validator/samples/namespace-invalid/errors.json
index 7081b9da27..e381545dc0 100644
--- a/packages/svelte/tests/validator/samples/namespace-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/namespace-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-svelte-option-namespace",
-		"message": "Unsupported <svelte:option> value for \"namespace\". Valid values are \"html\", \"svg\" or \"foreign\".",
+		"code": "invalid_svelte_option_namespace",
+		"message": "Unsupported `<svelte:option>` value for \"namespace\". Valid values are \"html\", \"svg\" or \"foreign\"",
 		"start": {
 			"line": 1,
 			"column": 16
diff --git a/packages/svelte/tests/validator/samples/namespace-non-literal/errors.json b/packages/svelte/tests/validator/samples/namespace-non-literal/errors.json
index 30c7ea279e..f8b2c75f05 100644
--- a/packages/svelte/tests/validator/samples/namespace-non-literal/errors.json
+++ b/packages/svelte/tests/validator/samples/namespace-non-literal/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-svelte-option-namespace",
-		"message": "Unsupported <svelte:option> value for \"namespace\". Valid values are \"html\", \"svg\" or \"foreign\".",
+		"code": "invalid_svelte_option_namespace",
+		"message": "Unsupported `<svelte:option>` value for \"namespace\". Valid values are \"html\", \"svg\" or \"foreign\"",
 		"start": {
 			"line": 1,
 			"column": 16
diff --git a/packages/svelte/tests/validator/samples/reactive-declaration-cyclical/errors.json b/packages/svelte/tests/validator/samples/reactive-declaration-cyclical/errors.json
index b4e3161be6..26fbd26534 100644
--- a/packages/svelte/tests/validator/samples/reactive-declaration-cyclical/errors.json
+++ b/packages/svelte/tests/validator/samples/reactive-declaration-cyclical/errors.json
@@ -1,8 +1,14 @@
 [
 	{
 		"message": "Cyclical dependency detected: a → b → a",
-		"code": "cyclical-reactive-declaration",
-		"start": { "line": 5, "column": 1 },
-		"end": { "line": 5, "column": 14 }
+		"code": "cyclical_reactive_declaration",
+		"start": {
+			"line": 5,
+			"column": 1
+		},
+		"end": {
+			"line": 5,
+			"column": 14
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/script-invalid-context/errors.json b/packages/svelte/tests/validator/samples/script-invalid-context/errors.json
index d7a502a2f7..173958d6c6 100644
--- a/packages/svelte/tests/validator/samples/script-invalid-context/errors.json
+++ b/packages/svelte/tests/validator/samples/script-invalid-context/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-script-context",
+		"code": "invalid_script_context",
 		"message": "If the context attribute is supplied, its value must be \"module\"",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/slot-attribute-invalid/errors.json b/packages/svelte/tests/validator/samples/slot-attribute-invalid/errors.json
index a5a3855787..e421039874 100644
--- a/packages/svelte/tests/validator/samples/slot-attribute-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/slot-attribute-invalid/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-slot-placement",
+		"code": "invalid_slot_placement",
 		"message": "Element with a slot='...' attribute must be a child of a component or a descendant of a custom element",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/style-directive-modifiers-invalid/errors.json b/packages/svelte/tests/validator/samples/style-directive-modifiers-invalid/errors.json
index ba88102f40..3d1373e8cd 100644
--- a/packages/svelte/tests/validator/samples/style-directive-modifiers-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/style-directive-modifiers-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
 		"message": "Invalid 'style:' modifier. Valid modifiers are: 'important'",
-		"code": "invalid-style-directive-modifier",
+		"code": "invalid_style_directive_modifier",
 		"start": {
 			"line": 1,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/svelte-fragment-placement-2/errors.json b/packages/svelte/tests/validator/samples/svelte-fragment-placement-2/errors.json
index 955d756a6d..cf34adc56b 100644
--- a/packages/svelte/tests/validator/samples/svelte-fragment-placement-2/errors.json
+++ b/packages/svelte/tests/validator/samples/svelte-fragment-placement-2/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-svelte-fragment-placement",
-		"message": "<svelte:fragment> must be the direct child of a component",
-		"start": { "line": 5, "column": 0 },
-		"end": { "line": 7, "column": 18 }
+		"code": "invalid_svelte_fragment_placement",
+		"message": "`<svelte:fragment>` must be the direct child of a component",
+		"start": {
+			"line": 5,
+			"column": 0
+		},
+		"end": {
+			"line": 7,
+			"column": 18
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/svelte-fragment-placement/errors.json b/packages/svelte/tests/validator/samples/svelte-fragment-placement/errors.json
index 2ad4c8390f..195b0fca19 100644
--- a/packages/svelte/tests/validator/samples/svelte-fragment-placement/errors.json
+++ b/packages/svelte/tests/validator/samples/svelte-fragment-placement/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-svelte-fragment-placement",
-		"message": "<svelte:fragment> must be the direct child of a component",
-		"start": { "line": 7, "column": 2 },
-		"end": { "line": 9, "column": 20 }
+		"code": "invalid_svelte_fragment_placement",
+		"message": "`<svelte:fragment>` must be the direct child of a component",
+		"start": {
+			"line": 7,
+			"column": 2
+		},
+		"end": {
+			"line": 9,
+			"column": 20
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/svelte-head-attributes/errors.json b/packages/svelte/tests/validator/samples/svelte-head-attributes/errors.json
index 026ba121ab..f230f20788 100644
--- a/packages/svelte/tests/validator/samples/svelte-head-attributes/errors.json
+++ b/packages/svelte/tests/validator/samples/svelte-head-attributes/errors.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "illegal-svelte-head-attribute",
-		"message": "<svelte:head> cannot have attributes nor directives",
-		"start": { "line": 1, "column": 13 },
-		"end": { "line": 1, "column": 14 }
+		"code": "illegal_svelte_head_attribute",
+		"message": "`<svelte:head>` cannot have attributes nor directives",
+		"start": {
+			"line": 1,
+			"column": 13
+		},
+		"end": {
+			"line": 1,
+			"column": 14
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/tag-invalid/errors.json b/packages/svelte/tests/validator/samples/tag-invalid/errors.json
index 7fc929b226..84d7f49de6 100644
--- a/packages/svelte/tests/validator/samples/tag-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/tag-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-tag-property",
-		"message": "tag name must be two or more words joined by the \"-\" character",
+		"code": "invalid_tag_property",
+		"message": "Tag name must be two or more words joined by the \"-\" character",
 		"start": {
 			"line": 1,
 			"column": 16
diff --git a/packages/svelte/tests/validator/samples/tag-non-string/errors.json b/packages/svelte/tests/validator/samples/tag-non-string/errors.json
index 46c98b70d5..0a41e50b9d 100644
--- a/packages/svelte/tests/validator/samples/tag-non-string/errors.json
+++ b/packages/svelte/tests/validator/samples/tag-non-string/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-svelte-option-customElement",
+		"code": "invalid_svelte_option_customElement",
 		"message": "\"customElement\" must be a string literal defining a valid custom element name or an object of the form { tag: string; shadow?: \"open\" | \"none\"; props?: { [key: string]: { attribute?: string; reflect?: boolean; type: .. } } }",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/textarea-value-children/errors.json b/packages/svelte/tests/validator/samples/textarea-value-children/errors.json
index c4aed6b426..e2ea3e48fc 100644
--- a/packages/svelte/tests/validator/samples/textarea-value-children/errors.json
+++ b/packages/svelte/tests/validator/samples/textarea-value-children/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-textarea-content",
-		"message": "A <textarea> can have either a value attribute or (equivalently) child content, but not both",
+		"code": "invalid_textarea_content",
+		"message": "A `<textarea>` can have either a value attribute or (equivalently) child content, but not both",
 		"start": {
 			"line": 1,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/title-no-attributes/errors.json b/packages/svelte/tests/validator/samples/title-no-attributes/errors.json
index 3f0410a6b0..85768c1fa9 100644
--- a/packages/svelte/tests/validator/samples/title-no-attributes/errors.json
+++ b/packages/svelte/tests/validator/samples/title-no-attributes/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "illegal-title-attribute",
-		"message": "<title> cannot have attributes nor directives",
+		"code": "illegal_title_attribute",
+		"message": "`<title>` cannot have attributes nor directives",
 		"start": {
 			"line": 2,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/title-no-children/errors.json b/packages/svelte/tests/validator/samples/title-no-children/errors.json
index 9d7a7667a1..6a4d2475e1 100644
--- a/packages/svelte/tests/validator/samples/title-no-children/errors.json
+++ b/packages/svelte/tests/validator/samples/title-no-children/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-title-content",
-		"message": "<title> can only contain text and {tags}",
+		"code": "invalid_title_content",
+		"message": "`<title>` can only contain text and {tags}",
 		"start": {
 			"line": 2,
 			"column": 11
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-in-transition/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-in-transition/errors.json
index 2af6bfca8b..f4d13f4f54 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-in-transition/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-in-transition/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element cannot have both an 'in' directive and a 'transition' directive",
+		"code": "transition_conflict",
+		"message": "Cannot use `in:` alongside existing `transition:` directive",
 		"start": {
 			"line": 6,
 			"column": 12
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-in/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-in/errors.json
index eba48be226..1f1690d256 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-in/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-in/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element can only have one 'in' directive",
+		"code": "transition_duplicate",
+		"message": "Cannot use multiple `in:` directives on a single element",
 		"start": {
 			"line": 6,
 			"column": 12
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-out-transition/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-out-transition/errors.json
index cb1a474216..16e4e09e8d 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-out-transition/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-out-transition/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element cannot have both an 'out' directive and a 'transition' directive",
+		"code": "transition_conflict",
+		"message": "Cannot use `out:` alongside existing `transition:` directive",
 		"start": {
 			"line": 6,
 			"column": 13
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-out/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-out/errors.json
index 34c57ab1b8..1dd1acde96 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-out/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-out/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element can only have one 'out' directive",
+		"code": "transition_duplicate",
+		"message": "Cannot use multiple `out:` directives on a single element",
 		"start": {
 			"line": 6,
 			"column": 13
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-transition-in/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-transition-in/errors.json
index c88dd30d16..89c6414100 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-transition-in/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-transition-in/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element cannot have both a 'transition' directive and an 'in' directive",
+		"code": "transition_conflict",
+		"message": "Cannot use `transition:` alongside existing `in:` directive",
 		"start": {
 			"line": 6,
 			"column": 20
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-transition-out/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-transition-out/errors.json
index 8c1a2a2706..3f0cbc0eee 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-transition-out/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-transition-out/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element cannot have both a 'transition' directive and an 'out' directive",
+		"code": "transition_conflict",
+		"message": "Cannot use `transition:` alongside existing `out:` directive",
 		"start": {
 			"line": 6,
 			"column": 20
diff --git a/packages/svelte/tests/validator/samples/transition-duplicate-transition/errors.json b/packages/svelte/tests/validator/samples/transition-duplicate-transition/errors.json
index 1c93b5cb87..6e9d2f900a 100644
--- a/packages/svelte/tests/validator/samples/transition-duplicate-transition/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-duplicate-transition/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "duplicate-transition",
-		"message": "An element can only have one 'transition' directive",
+		"code": "transition_duplicate",
+		"message": "Cannot use multiple `transition:` directives on a single element",
 		"start": {
 			"line": 6,
 			"column": 20
diff --git a/packages/svelte/tests/validator/samples/transition-on-component/errors.json b/packages/svelte/tests/validator/samples/transition-on-component/errors.json
index 7b2403bee6..52155a1480 100644
--- a/packages/svelte/tests/validator/samples/transition-on-component/errors.json
+++ b/packages/svelte/tests/validator/samples/transition-on-component/errors.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-component-directive",
+		"code": "invalid_component_directive",
 		"message": "This type of directive is not valid on components",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/window-binding-invalid-innerwidth/errors.json b/packages/svelte/tests/validator/samples/window-binding-invalid-innerwidth/errors.json
index 7f7a7eb6f9..99a1c892d3 100644
--- a/packages/svelte/tests/validator/samples/window-binding-invalid-innerwidth/errors.json
+++ b/packages/svelte/tests/validator/samples/window-binding-invalid-innerwidth/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'innerwidth' is not a valid binding (did you mean 'innerWidth'?)",
+		"code": "bind_invalid_detailed",
+		"message": "`bind:innerwidth` is not a valid binding. Did you mean 'innerWidth'?",
 		"start": {
 			"line": 5,
 			"column": 15
diff --git a/packages/svelte/tests/validator/samples/window-binding-invalid/errors.json b/packages/svelte/tests/validator/samples/window-binding-invalid/errors.json
index dc1fadfc08..fc6c219444 100644
--- a/packages/svelte/tests/validator/samples/window-binding-invalid/errors.json
+++ b/packages/svelte/tests/validator/samples/window-binding-invalid/errors.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-binding",
-		"message": "'potato' is not a valid binding",
+		"code": "bind_invalid",
+		"message": "`bind:potato` is not a valid binding",
 		"start": {
 			"line": 5,
 			"column": 15

From 5405ec6c91911f66f71a05b4fe79aef077896d9e Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Tue, 23 Apr 2024 13:34:06 -0400
Subject: [PATCH 15/18] chore: refactor logic for ignoring warnings (#11300)

* reimplement svelte-ignore logic

* simplify

* remove unused code

* remove ignores array from comment node

* unused

* regenerate types

* types

* oops, again
---
 packages/svelte/src/compiler/legacy.js        |  9 +-
 .../compiler/phases/1-parse/state/element.js  |  5 +-
 .../src/compiler/phases/2-analyze/a11y.js     | 10 +--
 .../compiler/phases/2-analyze/css/css-warn.js |  2 +-
 .../src/compiler/phases/2-analyze/index.js    | 88 ++++++++++++++++---
 .../src/compiler/phases/2-analyze/types.d.ts  |  1 +
 .../compiler/phases/2-analyze/validation.js   | 47 ++++------
 .../src/compiler/types/legacy-nodes.d.ts      |  9 ++
 .../svelte/src/compiler/types/template.d.ts   |  2 -
 .../compiler/utils/extract_svelte_ignore.js   | 38 --------
 packages/svelte/src/compiler/warnings.js      | 50 +----------
 .../samples/comment-before-script/output.json |  3 +-
 packages/svelte/types/index.d.ts              | 11 ++-
 13 files changed, 132 insertions(+), 143 deletions(-)

diff --git a/packages/svelte/src/compiler/legacy.js b/packages/svelte/src/compiler/legacy.js
index 49d2f78260..0357953060 100644
--- a/packages/svelte/src/compiler/legacy.js
+++ b/packages/svelte/src/compiler/legacy.js
@@ -4,6 +4,7 @@ import {
 	regex_not_whitespace,
 	regex_starts_with_whitespaces
 } from './phases/patterns.js';
+import { extract_svelte_ignore } from './utils/extract_svelte_ignore.js';
 
 /**
  * Some of the legacy Svelte AST nodes remove whitespace from the start and end of their children.
@@ -197,7 +198,13 @@ export function convert(source, ast) {
 			ClassDirective(node) {
 				return { ...node, type: 'Class' };
 			},
-			ComplexSelector(node, { visit }) {
+			Comment(node) {
+				return {
+					...node,
+					ignores: extract_svelte_ignore(node.data)
+				};
+			},
+			ComplexSelector(node) {
 				const children = [];
 
 				for (const child of node.children) {
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/element.js b/packages/svelte/src/compiler/phases/1-parse/state/element.js
index 134f322967..7696b23a66 100644
--- a/packages/svelte/src/compiler/phases/1-parse/state/element.js
+++ b/packages/svelte/src/compiler/phases/1-parse/state/element.js
@@ -1,5 +1,3 @@
-import { extract_svelte_ignore } from '../../../utils/extract_svelte_ignore.js';
-import fuzzymatch from '../utils/fuzzymatch.js';
 import { is_void } from '../utils/names.js';
 import read_expression from '../read/expression.js';
 import { read_script } from '../read/script.js';
@@ -87,8 +85,7 @@ export default function tag(parser) {
 			type: 'Comment',
 			start,
 			end: parser.index,
-			data,
-			ignores: extract_svelte_ignore(data)
+			data
 		});
 
 		return;
diff --git a/packages/svelte/src/compiler/phases/2-analyze/a11y.js b/packages/svelte/src/compiler/phases/2-analyze/a11y.js
index eb87b5ddbf..7d01c6fdb3 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/a11y.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/a11y.js
@@ -667,9 +667,8 @@ function get_static_text_value(attribute) {
 /**
  * @param {import('#compiler').RegularElement | import('#compiler').SvelteElement} node
  * @param {import('./types.js').AnalysisState} state
- * @param {import('#compiler').SvelteNode[]} path
  */
-function check_element(node, state, path) {
+function check_element(node, state) {
 	// foreign namespace means elements can have completely different meanings, therefore we don't check them
 	if (state.options.namespace === 'foreign') return;
 
@@ -680,8 +679,7 @@ function check_element(node, state, path) {
 	 * @param  {Parameters<import('../../warnings.js').AllWarnings[T]>} args
 	 * @returns {void}
 	 */
-	const push_warning = (node, code, ...args) =>
-		warn(state.analysis.warnings, node, path, code, ...args);
+	const push_warning = (node, code, ...args) => warn(state.analysis.warnings, node, code, ...args);
 
 	/** @type {Map<string, import('#compiler').Attribute>} */
 	const attribute_map = new Map();
@@ -1165,9 +1163,9 @@ function check_element(node, state, path) {
  */
 export const a11y_validators = {
 	RegularElement(node, context) {
-		check_element(node, context.state, context.path);
+		check_element(node, context.state);
 	},
 	SvelteElement(node, context) {
-		check_element(node, context.state, context.path);
+		check_element(node, context.state);
 	}
 };
diff --git a/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js b/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
index 3aa2382205..e2d137198b 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
@@ -26,7 +26,7 @@ const visitors = {
 		if (!node.metadata.used) {
 			const content = context.state.stylesheet.content;
 			const text = content.styles.substring(node.start - content.start, node.end - content.start);
-			warn(context.state.warnings, node, context.path, 'css-unused-selector', text);
+			warn(context.state.warnings, node, 'css-unused-selector', text);
 		}
 
 		context.next();
diff --git a/packages/svelte/src/compiler/phases/2-analyze/index.js b/packages/svelte/src/compiler/phases/2-analyze/index.js
index 10091a7105..d2a331e253 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/index.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/index.js
@@ -24,6 +24,7 @@ import { analyze_css } from './css/css-analyze.js';
 import { prune } from './css/css-prune.js';
 import { hash } from './utils.js';
 import { warn_unused } from './css/css-warn.js';
+import { extract_svelte_ignore } from '../../utils/extract_svelte_ignore.js';
 
 /**
  * @param {import('#compiler').Script | null} script
@@ -330,7 +331,7 @@ export function analyze_component(root, source, options) {
 				} else if (declaration !== null && Runes.includes(/** @type {any} */ (name))) {
 					for (const { node, path } of references) {
 						if (path.at(-1)?.type === 'CallExpression') {
-							warn(warnings, node, [], 'store-with-rune-name', store_name);
+							warn(warnings, node, 'store-with-rune-name', store_name);
 						}
 					}
 				}
@@ -407,7 +408,7 @@ export function analyze_component(root, source, options) {
 	};
 
 	if (!options.customElement && root.options?.customElement) {
-		warn(analysis.warnings, root.options, [], 'missing-custom-element-compile-option');
+		warn(analysis.warnings, root.options, 'missing-custom-element-compile-option');
 	}
 
 	if (analysis.runes) {
@@ -433,7 +434,8 @@ export function analyze_component(root, source, options) {
 				component_slots: new Set(),
 				expression: null,
 				private_derived_state: [],
-				function_depth: scope.function_depth
+				function_depth: scope.function_depth,
+				ignores: new Set()
 			};
 
 			walk(
@@ -475,7 +477,8 @@ export function analyze_component(root, source, options) {
 				component_slots: new Set(),
 				expression: null,
 				private_derived_state: [],
-				function_depth: scope.function_depth
+				function_depth: scope.function_depth,
+				ignores: new Set()
 			};
 
 			walk(
@@ -495,7 +498,7 @@ export function analyze_component(root, source, options) {
 					(r) => r.node !== binding.node && r.path.at(-1)?.type !== 'ExportSpecifier'
 				);
 				if (!references.length && !instance.scope.declarations.has(`$${name}`)) {
-					warn(warnings, binding.node, [], 'unused-export-let', name);
+					warn(warnings, binding.node, 'unused-export-let', name);
 				}
 			}
 		}
@@ -535,7 +538,7 @@ export function analyze_component(root, source, options) {
 									type === 'AwaitBlock' ||
 									type === 'KeyBlock'
 								) {
-									warn(warnings, binding.node, [], 'non-state-reference', name);
+									warn(warnings, binding.node, 'non-state-reference', name);
 									continue outer;
 								}
 							}
@@ -543,7 +546,7 @@ export function analyze_component(root, source, options) {
 						}
 					}
 
-					warn(warnings, binding.node, [], 'non-state-reference', name);
+					warn(warnings, binding.node, 'non-state-reference', name);
 					continue outer;
 				}
 			}
@@ -557,7 +560,13 @@ export function analyze_component(root, source, options) {
 		for (const element of analysis.elements) {
 			prune(analysis.css.ast, element);
 		}
-		warn_unused(analysis.css.ast, analysis.warnings);
+
+		if (
+			!analysis.css.ast.content.comment ||
+			!extract_svelte_ignore(analysis.css.ast.content.comment.data).includes('css-unused-selector')
+		) {
+			warn_unused(analysis.css.ast, analysis.warnings);
+		}
 
 		outer: for (const element of analysis.elements) {
 			if (element.metadata.scoped) {
@@ -679,7 +688,7 @@ const legacy_scope_tweaker = {
 				(d) => d.scope === state.analysis.module.scope && d.declaration_kind !== 'const'
 			)
 		) {
-			warn(state.analysis.warnings, node, path, 'module-script-reactive-declaration');
+			warn(state.analysis.warnings, node, 'module-script-reactive-declaration');
 		}
 
 		if (
@@ -1045,6 +1054,65 @@ const function_visitor = (node, context) => {
 
 /** @type {import('./types').Visitors} */
 const common_visitors = {
+	_(node, context) {
+		// @ts-expect-error
+		const comments = /** @type {import('estree').Comment[]} */ (node.leadingComments);
+
+		if (comments) {
+			/** @type {string[]} */
+			const ignores = [];
+
+			for (const comment of comments) {
+				ignores.push(...extract_svelte_ignore(comment.value));
+			}
+
+			if (ignores.length > 0) {
+				// @ts-expect-error see below
+				node.ignores = new Set([...context.state.ignores, ...ignores]);
+			}
+		}
+
+		// @ts-expect-error
+		if (node.ignores) {
+			context.next({
+				...context.state,
+				// @ts-expect-error see below
+				ignores: node.ignores
+			});
+		} else if (context.state.ignores.size > 0) {
+			// @ts-expect-error
+			node.ignores = context.state.ignores;
+		}
+	},
+	Fragment(node, context) {
+		/** @type {string[]} */
+		let ignores = [];
+
+		for (const child of node.nodes) {
+			if (child.type === 'Text' && child.data.trim() === '') {
+				continue;
+			}
+
+			if (child.type === 'Comment') {
+				ignores.push(...extract_svelte_ignore(child.data));
+			} else {
+				const combined_ignores = new Set(context.state.ignores);
+				for (const ignore of ignores) combined_ignores.add(ignore);
+
+				if (combined_ignores.size > 0) {
+					// TODO this is a grotesque hack that's made necessary by the fact that
+					// we can't call `context.visit(...)` here, because we do the convoluted
+					// visitor merging thing. I'm increasingly of the view that we should
+					// rearchitect this stuff and have a single visitor per node. It'd be
+					// more efficient and much simpler.
+					// @ts-expect-error
+					child.ignores = combined_ignores;
+				}
+
+				ignores = [];
+			}
+		}
+	},
 	Attribute(node, context) {
 		if (node.value === true) return;
 
@@ -1142,7 +1210,7 @@ const common_visitors = {
 					binding.kind === 'derived') &&
 				context.state.function_depth === binding.scope.function_depth
 			) {
-				warn(context.state.analysis.warnings, node, context.path, 'static-state-reference');
+				warn(context.state.analysis.warnings, node, 'static-state-reference');
 			}
 		}
 	},
diff --git a/packages/svelte/src/compiler/phases/2-analyze/types.d.ts b/packages/svelte/src/compiler/phases/2-analyze/types.d.ts
index d2c503e8b1..cc815fae7b 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/types.d.ts
+++ b/packages/svelte/src/compiler/phases/2-analyze/types.d.ts
@@ -22,6 +22,7 @@ export interface AnalysisState {
 	expression: ExpressionTag | ClassDirective | SpreadAttribute | null;
 	private_derived_state: string[];
 	function_depth: number;
+	ignores: Set<string>;
 }
 
 export interface LegacyAnalysisState extends AnalysisState {
diff --git a/packages/svelte/src/compiler/phases/2-analyze/validation.js b/packages/svelte/src/compiler/phases/2-analyze/validation.js
index cd1aed4b2d..f4321b0101 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/validation.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/validation.js
@@ -134,7 +134,6 @@ function validate_element(node, context) {
 					warn(
 						context.state.analysis.warnings,
 						attribute,
-						context.path,
 						'global-event-reference',
 						attribute.name
 					);
@@ -147,7 +146,7 @@ function validate_element(node, context) {
 			}
 
 			if (attribute.name === 'is' && context.state.options.namespace !== 'foreign') {
-				warn(context.state.analysis.warnings, attribute, context.path, 'avoid-is');
+				warn(context.state.analysis.warnings, attribute, 'avoid-is');
 			}
 
 			const correct_name = react_attributes.get(attribute.name);
@@ -155,7 +154,6 @@ function validate_element(node, context) {
 				warn(
 					context.state.analysis.warnings,
 					attribute,
-					context.path,
 					'invalid-html-attribute',
 					attribute.name,
 					correct_name
@@ -235,7 +233,7 @@ function validate_attribute_name(attribute, context) {
 		!attribute.name.startsWith('xlink:') &&
 		!attribute.name.startsWith('xml:')
 	) {
-		warn(context.state.analysis.warnings, attribute, context.path, 'illegal-attribute-character');
+		warn(context.state.analysis.warnings, attribute, 'illegal-attribute-character');
 	}
 }
 
@@ -313,7 +311,7 @@ function validate_block_not_empty(node, context) {
 	// Assumption: If the block has zero elements, someone's in the middle of typing it out,
 	// so don't warn in that case because it would be distracting.
 	if (node.nodes.length === 1 && node.nodes[0].type === 'Text' && !node.nodes[0].raw.trim()) {
-		warn(context.state.analysis.warnings, node.nodes[0], context.path, 'empty-block');
+		warn(context.state.analysis.warnings, node.nodes[0], 'empty-block');
 	}
 }
 
@@ -377,7 +375,6 @@ const validation = {
 			warn(
 				context.state.analysis.warnings,
 				binding.node,
-				context.path,
 				'invalid-rest-eachblock-binding',
 				binding.node.name
 			);
@@ -534,13 +531,7 @@ const validation = {
 			binding.declaration_kind === 'import' &&
 			binding.references.length === 0
 		) {
-			warn(
-				context.state.analysis.warnings,
-				node,
-				context.path,
-				'component-name-lowercase',
-				node.name
-			);
+			warn(context.state.analysis.warnings, node, 'component-name-lowercase', node.name);
 		}
 
 		validate_element(node, context);
@@ -579,13 +570,7 @@ const validation = {
 			!VoidElements.includes(node.name) &&
 			!SVGElements.includes(node.name)
 		) {
-			warn(
-				context.state.analysis.warnings,
-				node,
-				context.path,
-				'invalid-self-closing-tag',
-				node.name
-			);
+			warn(context.state.analysis.warnings, node, 'invalid-self-closing-tag', node.name);
 		}
 
 		context.next({
@@ -781,7 +766,7 @@ export const validation_legacy = merge(validation, a11y_validators, {
 			(state.ast_type !== 'instance' ||
 				/** @type {import('#compiler').SvelteNode} */ (path.at(-1)).type !== 'Program')
 		) {
-			warn(state.analysis.warnings, node, path, 'no-reactive-declaration');
+			warn(state.analysis.warnings, node, 'no-reactive-declaration');
 		}
 	},
 	UpdateExpression(node, { state }) {
@@ -984,12 +969,12 @@ export const validation_runes_js = {
 		const allowed_depth = context.state.ast_type === 'module' ? 0 : 1;
 
 		if (context.state.scope.function_depth > allowed_depth) {
-			warn(context.state.analysis.warnings, node, context.path, 'avoid-nested-class');
+			warn(context.state.analysis.warnings, node, 'avoid-nested-class');
 		}
 	},
 	NewExpression(node, context) {
 		if (node.callee.type === 'ClassExpression' && context.state.scope.function_depth > 0) {
-			warn(context.state.analysis.warnings, node, context.path, 'avoid-inline-class');
+			warn(context.state.analysis.warnings, node, 'avoid-inline-class');
 		}
 	}
 };
@@ -1134,7 +1119,7 @@ export const validation_runes = merge(validation, a11y_validators, {
 		}
 		next({ ...state });
 	},
-	VariableDeclarator(node, { state, path }) {
+	VariableDeclarator(node, { state }) {
 		ensure_no_module_import_conflict(node, state);
 
 		const init = node.init;
@@ -1142,7 +1127,7 @@ export const validation_runes = merge(validation, a11y_validators, {
 
 		if (rune === null) {
 			if (init?.type === 'Identifier' && init.name === '$props' && !state.scope.get('props')) {
-				warn(state.analysis.warnings, node, path, 'invalid-props-declaration');
+				warn(state.analysis.warnings, node, 'invalid-props-declaration');
 			}
 			return;
 		}
@@ -1195,29 +1180,29 @@ export const validation_runes = merge(validation, a11y_validators, {
 				arg.type === 'CallExpression' &&
 				(arg.callee.type === 'ArrowFunctionExpression' || arg.callee.type === 'FunctionExpression')
 			) {
-				warn(state.analysis.warnings, node, path, 'derived-iife');
+				warn(state.analysis.warnings, node, 'derived-iife');
 			}
 		}
 	},
-	AssignmentPattern(node, { state, path }) {
+	AssignmentPattern(node, { state }) {
 		if (
 			node.right.type === 'Identifier' &&
 			node.right.name === '$bindable' &&
 			!state.scope.get('bindable')
 		) {
-			warn(state.analysis.warnings, node, path, 'invalid-bindable-declaration');
+			warn(state.analysis.warnings, node, 'invalid-bindable-declaration');
 		}
 	},
-	SlotElement(node, { state, path }) {
+	SlotElement(node, { state }) {
 		if (!state.analysis.custom_element) {
-			warn(state.analysis.warnings, node, path, 'deprecated-slot-element');
+			warn(state.analysis.warnings, node, 'deprecated-slot-element');
 		}
 	},
 	OnDirective(node, { state, path }) {
 		const parent_type = path.at(-1)?.type;
 		// Don't warn on component events; these might not be under the author's control so the warning would be unactionable
 		if (parent_type === 'RegularElement' || parent_type === 'SvelteElement') {
-			warn(state.analysis.warnings, node, path, 'deprecated-event-handler', node.name);
+			warn(state.analysis.warnings, node, 'deprecated-event-handler', node.name);
 		}
 	},
 	// TODO this is a code smell. need to refactor this stuff
diff --git a/packages/svelte/src/compiler/types/legacy-nodes.d.ts b/packages/svelte/src/compiler/types/legacy-nodes.d.ts
index 45b26aa70f..0ba61c053c 100644
--- a/packages/svelte/src/compiler/types/legacy-nodes.d.ts
+++ b/packages/svelte/src/compiler/types/legacy-nodes.d.ts
@@ -198,6 +198,14 @@ export interface LegacyWindow extends BaseElement {
 	type: 'Window';
 }
 
+export interface LegacyComment extends BaseNode {
+	type: 'Comment';
+	/** the contents of the comment */
+	data: string;
+	/** any svelte-ignore directives — <!-- svelte-ignore a b c --> would result in ['a', 'b', 'c'] */
+	ignores: string[];
+}
+
 type LegacyDirective =
 	| LegacyAnimation
 	| LegacyBinding
@@ -213,6 +221,7 @@ export type LegacyAttributeLike = LegacyAttribute | LegacySpread | LegacyDirecti
 export type LegacyElementLike =
 	| LegacyBody
 	| LegacyCatchBlock
+	| LegacyComment
 	| LegacyDocument
 	| LegacyElement
 	| LegacyHead
diff --git a/packages/svelte/src/compiler/types/template.d.ts b/packages/svelte/src/compiler/types/template.d.ts
index 4ddee3096f..e8f20c9b33 100644
--- a/packages/svelte/src/compiler/types/template.d.ts
+++ b/packages/svelte/src/compiler/types/template.d.ts
@@ -131,8 +131,6 @@ export interface Comment extends BaseNode {
 	type: 'Comment';
 	/** the contents of the comment */
 	data: string;
-	/** any svelte-ignore directives — <!-- svelte-ignore a b c --> would result in ['a', 'b', 'c'] */
-	ignores: string[];
 }
 
 /** A `{@const ...}` tag */
diff --git a/packages/svelte/src/compiler/utils/extract_svelte_ignore.js b/packages/svelte/src/compiler/utils/extract_svelte_ignore.js
index e45ff53b03..bdc8c15851 100644
--- a/packages/svelte/src/compiler/utils/extract_svelte_ignore.js
+++ b/packages/svelte/src/compiler/utils/extract_svelte_ignore.js
@@ -15,41 +15,3 @@ export function extract_svelte_ignore(text) {
 				.filter(Boolean)
 		: [];
 }
-
-/**
- * @template {{ leadingComments?: Array<{ value: string }> }} Node
- * @param {Node} node
- * @returns {string[]}
- */
-export function extract_svelte_ignore_from_comments(node) {
-	return (node.leadingComments || []).flatMap(
-		/** @param {any} comment */ (comment) => extract_svelte_ignore(comment.value)
-	);
-}
-
-/**
- * @param {import('#compiler').TemplateNode} node
- * @param {import('#compiler').TemplateNode[]} template_nodes
- * @returns {string[]}
- */
-export function extract_ignores_above_position(node, template_nodes) {
-	const previous_node_idx = template_nodes.indexOf(node) - 1;
-	if (previous_node_idx < 0) {
-		return [];
-	}
-
-	const ignores = [];
-	for (let i = previous_node_idx; i >= 0; i--) {
-		const node = template_nodes[i];
-		if (node.type !== 'Comment' && node.type !== 'Text') {
-			return ignores;
-		}
-		if (node.type === 'Comment') {
-			if (node.ignores.length) {
-				ignores.push(...node.ignores);
-			}
-		}
-	}
-
-	return ignores;
-}
diff --git a/packages/svelte/src/compiler/warnings.js b/packages/svelte/src/compiler/warnings.js
index fc5897aa93..3983d3686e 100644
--- a/packages/svelte/src/compiler/warnings.js
+++ b/packages/svelte/src/compiler/warnings.js
@@ -1,8 +1,3 @@
-import {
-	extract_ignores_above_position,
-	extract_svelte_ignore_from_comments
-} from './utils/extract_svelte_ignore.js';
-
 /** @typedef {Record<string, (...args: any[]) => string>} Warnings */
 
 /** @satisfies {Warnings} */
@@ -277,52 +272,15 @@ const warnings = {
  * @template {keyof AllWarnings} T
  * @param {import('./phases/types').RawWarning[]} array the array to push the warning to, if not ignored
  * @param {{ start?: number, end?: number, type?: string, parent?: import('#compiler').SvelteNode | null, leadingComments?: import('estree').Comment[] } | null} node the node related to the warning
- * @param {import('#compiler').SvelteNode[]} path the path to the node, so that we can traverse upwards to find svelte-ignore comments
  * @param {T} code the warning code
  * @param  {Parameters<AllWarnings[T]>} args the arguments to pass to the warning function
  * @returns {void}
  */
-export function warn(array, node, path, code, ...args) {
-	const fn = warnings[code];
+export function warn(array, node, code, ...args) {
+	// @ts-expect-error
+	if (node.ignores?.has(code)) return;
 
-	// Traverse the AST upwards to find any svelte-ignore comments.
-	// This assumes that people don't have their code littered with warnings,
-	// at which point this might become inefficient.
-	/** @type {string[]} */
-	const ignores = [];
-
-	if (node) {
-		// comments inside JavaScript (estree)
-		if ('leadingComments' in node) {
-			ignores.push(...extract_svelte_ignore_from_comments(node));
-		}
-	}
-
-	for (let i = path.length - 1; i >= 0; i--) {
-		const current = path[i];
-
-		// comments inside JavaScript (estree)
-		if ('leadingComments' in current) {
-			ignores.push(...extract_svelte_ignore_from_comments(current));
-		}
-
-		// Svelte nodes
-		if (current.type === 'Fragment') {
-			ignores.push(
-				...extract_ignores_above_position(
-					/** @type {import('#compiler').TemplateNode} */ (path[i + 1] ?? node),
-					current.nodes
-				)
-			);
-		}
-
-		// Style nodes
-		if (current.type === 'StyleSheet' && current.content.comment) {
-			ignores.push(...current.content.comment.ignores);
-		}
-	}
-
-	if (ignores.includes(code)) return;
+	const fn = warnings[code];
 
 	const start = node?.start;
 	const end = node?.end;
diff --git a/packages/svelte/tests/parser-modern/samples/comment-before-script/output.json b/packages/svelte/tests/parser-modern/samples/comment-before-script/output.json
index e7e5dfe244..b0305d709b 100644
--- a/packages/svelte/tests/parser-modern/samples/comment-before-script/output.json
+++ b/packages/svelte/tests/parser-modern/samples/comment-before-script/output.json
@@ -11,8 +11,7 @@
 				"type": "Comment",
 				"start": 0,
 				"end": 27,
-				"data": "should not error out",
-				"ignores": []
+				"data": "should not error out"
 			},
 			{
 				"type": "Text",
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 633a910991..5563610b94 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -955,6 +955,14 @@ declare module 'svelte/compiler' {
 		type: 'Window';
 	}
 
+	interface LegacyComment extends BaseNode_1 {
+		type: 'Comment';
+		/** the contents of the comment */
+		data: string;
+		/** any svelte-ignore directives — <!-- svelte-ignore a b c --> would result in ['a', 'b', 'c'] */
+		ignores: string[];
+	}
+
 	type LegacyDirective =
 		| LegacyAnimation
 		| LegacyBinding
@@ -970,6 +978,7 @@ declare module 'svelte/compiler' {
 	type LegacyElementLike =
 		| LegacyBody
 		| LegacyCatchBlock
+		| LegacyComment
 		| LegacyDocument
 		| LegacyElement
 		| LegacyHead
@@ -1355,8 +1364,6 @@ declare module 'svelte/compiler' {
 		type: 'Comment';
 		/** the contents of the comment */
 		data: string;
-		/** any svelte-ignore directives — <!-- svelte-ignore a b c --> would result in ['a', 'b', 'c'] */
-		ignores: string[];
 	}
 
 	/** A `{@const ...}` tag */

From 7b55bd4d89e0642da8e091021d0926493bbad973 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Tue, 23 Apr 2024 21:32:28 -0400
Subject: [PATCH 16/18] chore: markdown warnings (#11302)

* rename warnings.js to warnings-tmp.js

* start porting warnings

* centralise stuff

* finish porting warnings

* tidy up

* get messages into JSDoc annotations

* prettier

* lint
---
 .prettierignore                               |   1 +
 .../svelte/messages/compile-warnings/a11y.md  | 171 ++++
 .../messages/compile-warnings/attributes.md   |  15 +
 .../svelte/messages/compile-warnings/block.md |   3 +
 .../messages/compile-warnings/components.md   |   3 +
 .../svelte/messages/compile-warnings/css.md   |   3 +
 .../messages/compile-warnings/legacy.md       |  19 +
 .../svelte/messages/compile-warnings/misc.md  |   3 +
 .../messages/compile-warnings/options.md      |   3 +
 .../messages/compile-warnings/performance.md  |   7 +
 .../svelte/messages/compile-warnings/runes.md |  19 +
 .../svelte/messages/compile-warnings/state.md |   7 +
 packages/svelte/package.json                  |   4 +-
 .../svelte/scripts/process-messages/index.js  |  11 +-
 .../templates/compile-errors.js               |   2 +-
 .../templates/compile-warnings.js             |  52 +
 packages/svelte/src/compiler/errors.js        | 257 ++---
 packages/svelte/src/compiler/index.js         |   8 +-
 .../src/compiler/phases/2-analyze/a11y.js     | 216 +++--
 .../compiler/phases/2-analyze/css/css-warn.js |  11 +-
 .../src/compiler/phases/2-analyze/index.js    |  36 +-
 .../compiler/phases/2-analyze/validation.js   |  59 +-
 .../src/compiler/phases/3-transform/index.js  |  43 +-
 .../svelte/src/compiler/phases/types.d.ts     |  10 +-
 packages/svelte/src/compiler/utils/string.js  |   9 +
 packages/svelte/src/compiler/warnings.js      | 910 ++++++++++++------
 .../_config.js                                |   2 +-
 .../descendant-selector-unmatched/_config.js  |   2 +-
 .../css/samples/dynamic-element/_config.js    |   2 +-
 .../tests/css/samples/empty-class/_config.js  |   2 +-
 .../_config.js                                |   6 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |   2 +-
 .../general-siblings-combinator-if/_config.js |   6 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |  12 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |   2 +-
 .../general-siblings-combinator/_config.js    |   8 +-
 .../tests/css/samples/global-block/_config.js |   2 +-
 .../global-with-unused-descendant/_config.js  |   2 +-
 .../svelte/tests/css/samples/host/_config.js  |   2 +-
 .../svelte/tests/css/samples/is/_config.js    |   2 +-
 .../tests/css/samples/nested-css/_config.js   |  14 +-
 .../_config.js                                |   2 +-
 .../samples/preserve-specificity/input.svelte |   4 +-
 .../siblings-combinator-await/_config.js      |   8 +-
 .../siblings-combinator-each-2/_config.js     |   2 +-
 .../_config.js                                |  20 +-
 .../siblings-combinator-each-else/_config.js  |   4 +-
 .../_config.js                                |  16 +-
 .../siblings-combinator-global/_config.js     |   4 +-
 .../_config.js                                |   2 +-
 .../_config.js                                |   2 +-
 .../samples/siblings-combinator-if/_config.js |   8 +-
 .../siblings-combinator-slot/_config.js       |   6 +-
 .../siblings-combinator-star/_config.js       |   2 +-
 .../samples/siblings-combinator/_config.js    |   8 +-
 .../_config.js                                |   6 +-
 .../_config.js                                |   2 +-
 .../unused-selector-leading/_config.js        |   4 +-
 .../unused-selector-string-concat/_config.js  |  20 +-
 .../unused-selector-ternary-concat/_config.js |   2 +-
 .../unused-selector-ternary-nested/_config.js |   4 +-
 .../unused-selector-ternary/_config.js        |   2 +-
 .../unused-selector-trailing/_config.js       |   2 +-
 .../css/samples/unused-selector/_config.js    |   2 +-
 .../extended-builtin/_config.js               |   2 +-
 .../samples/a11y-alt-text/warnings.json       |  16 +-
 .../a11y-anchor-has-content/warnings.json     |   4 +-
 .../a11y-anchor-in-svg-is-valid/warnings.json |  12 +-
 .../a11y-anchor-is-valid/warnings.json        |  24 +-
 .../a11y-aria-activedescendant/warnings.json  |   4 +-
 .../samples/a11y-aria-props/warnings.json     |   8 +-
 .../a11y-aria-proptypes-boolean/warnings.json |   8 +-
 .../a11y-aria-proptypes-integer/warnings.json |  12 +-
 .../a11y-aria-proptypes-number/warnings.json  |  12 +-
 .../a11y-aria-proptypes-string/warnings.json  |   4 +-
 .../a11y-aria-proptypes-token/warnings.json   |  16 +-
 .../warnings.json                             |  20 +-
 .../warnings.json                             |   8 +-
 .../samples/a11y-aria-role/warnings.json      |   8 +-
 .../warnings.json                             |   8 +-
 .../a11y-autocomplete-valid/warnings.json     |  12 +-
 .../input.svelte                              |  42 +-
 .../warnings.json                             |  32 +-
 .../a11y-figcaption-wrong-place/warnings.json |   8 +-
 .../a11y-heading-has-content/warnings.json    |   8 +-
 .../samples/a11y-html-has-lang/warnings.json  |   4 +-
 .../a11y-iframe-has-title/warnings.json       |   4 +-
 .../a11y-img-redundant-alt/warnings.json      |  12 +-
 .../warnings.json                             |  92 +-
 .../warnings.json                             |   8 +-
 .../a11y-media-has-caption/warnings.json      |  16 +-
 .../input.svelte                              |  12 +-
 .../warnings.json                             |  16 +-
 .../a11y-no-abstract-roles/warnings.json      |  48 +-
 .../samples/a11y-no-access-key/warnings.json  |   4 +-
 .../samples/a11y-no-autofocus/warnings.json   |   4 +-
 .../warnings.json                             |   8 +-
 .../warnings.json                             | 236 ++---
 .../warnings.json                             |  20 +-
 .../warnings.json                             | 196 ++--
 .../warnings.json                             |  16 +-
 .../a11y-no-redundant-roles/input.svelte      |   2 +-
 .../a11y-no-redundant-roles/warnings.json     | 156 +--
 .../input.svelte                              |   6 +-
 .../warnings.json                             |   8 +-
 .../a11y-not-on-components/warnings.json      |   4 +-
 .../warnings.json                             |  16 +-
 .../warnings.json                             | 716 +++++++-------
 .../samples/a11y-scope/warnings.json          |   4 +-
 .../a11y-tabindex-no-positive/warnings.json   |   4 +-
 .../samples/component-dynamic/input.svelte    |   6 +-
 .../samples/component-dynamic/warnings.json   |   6 +-
 .../component-name-lowercase/warnings.json    |   2 +-
 .../samples/empty-block/warnings.json         |  48 +-
 .../samples/error-mode-warn/warnings.json     |   4 +-
 .../warnings.json                             |   2 +-
 .../global-event-reference/warnings.json      |   4 +-
 .../samples/ignore-warning/input.svelte       |   4 +-
 .../samples/ignore-warning/warnings.json      |   8 +-
 .../ignore-warnings-cumulative/input.svelte   |   6 +-
 .../ignore-warnings-cumulative/warnings.json  |   4 +-
 .../ignore-warnings-newline/input.svelte      |   6 +-
 .../ignore-warnings-newline/warnings.json     |   4 +-
 .../ignore-warnings-stacked/input.svelte      |   6 +-
 .../ignore-warnings-stacked/warnings.json     |   4 +-
 .../samples/ignore-warnings/input.svelte      |   4 +-
 .../samples/ignore-warnings/warnings.json     |   4 +-
 .../illegal-attribute-character/warnings.json |   4 +-
 .../samples/inline-new-class-2/warnings.json  |   2 +-
 .../samples/inline-new-class-4/warnings.json  |   2 +-
 .../samples/inline-new-class/warnings.json    |   2 +-
 .../invalid-self-closing-tag/warnings.json    |   4 +-
 .../warnings.json                             |  12 +-
 .../warnings.json                             |  12 +-
 .../reactive-module-variable/warnings.json    |   2 +-
 .../rest-eachblock-binding-2/warnings.json    |  12 +-
 .../rest-eachblock-binding-3/warnings.json    |  12 +-
 .../warnings.json                             |   4 +-
 .../rest-eachblock-binding/warnings.json      |  12 +-
 .../runes-bindable-not-called/warnings.json   |   4 +-
 .../warnings.json                             |   6 +-
 .../runes-props-not-called/warnings.json      |   4 +-
 .../warnings.json                             |   4 +-
 .../runes-referenced-nonstate/warnings.json   |   8 +-
 .../warnings.json                             |   2 +-
 .../samples/silence-warnings-2/input.svelte   |   2 +-
 .../samples/silence-warnings/input.svelte     |   4 +-
 .../samples/slot-warning-ignore/input.svelte  |   4 +-
 .../samples/slot-warning/input.svelte         |   2 +-
 .../samples/slot-warning/warnings.json        |   4 +-
 .../samples/slot-warning2/input.svelte        |   4 +-
 .../samples/slot-warning2/warnings.json       |   4 +-
 .../static-state-reference/warnings.json      |   4 +-
 .../store-runes-conflict/warnings.json        |   4 +-
 .../warnings.json                             |   2 +-
 .../unreferenced-variables-each/warnings.json |   4 +-
 .../unreferenced-variables/warnings.json      |  10 +-
 .../samples/use-the-platform/warnings.json    |   4 +-
 164 files changed, 2475 insertions(+), 1779 deletions(-)
 create mode 100644 packages/svelte/messages/compile-warnings/a11y.md
 create mode 100644 packages/svelte/messages/compile-warnings/attributes.md
 create mode 100644 packages/svelte/messages/compile-warnings/block.md
 create mode 100644 packages/svelte/messages/compile-warnings/components.md
 create mode 100644 packages/svelte/messages/compile-warnings/css.md
 create mode 100644 packages/svelte/messages/compile-warnings/legacy.md
 create mode 100644 packages/svelte/messages/compile-warnings/misc.md
 create mode 100644 packages/svelte/messages/compile-warnings/options.md
 create mode 100644 packages/svelte/messages/compile-warnings/performance.md
 create mode 100644 packages/svelte/messages/compile-warnings/runes.md
 create mode 100644 packages/svelte/messages/compile-warnings/state.md
 create mode 100644 packages/svelte/scripts/process-messages/templates/compile-warnings.js
 create mode 100644 packages/svelte/src/compiler/utils/string.js

diff --git a/.prettierignore b/.prettierignore
index 77bdd29cf3..4eea07c2e7 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -4,6 +4,7 @@ packages/**/npm/**/*
 packages/**/config/*.js
 packages/svelte/messages/**/*.md
 packages/svelte/src/compiler/errors.js
+packages/svelte/src/compiler/warnings.js
 packages/svelte/tests/**/*.svelte
 packages/svelte/tests/**/_expected*
 packages/svelte/tests/**/_actual*
diff --git a/packages/svelte/messages/compile-warnings/a11y.md b/packages/svelte/messages/compile-warnings/a11y.md
new file mode 100644
index 0000000000..0e2aaa92b0
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/a11y.md
@@ -0,0 +1,171 @@
+## a11y_aria_attributes
+
+<%name%> should not have aria-* attributes
+
+## a11y_unknown_aria_attribute
+
+Unknown aria attribute 'aria-%attribute%'
+
+## a11y_unknown_aria_attribute_suggestion
+
+Unknown aria attribute 'aria-%attribute%'. Did you mean '%suggestion%'?
+
+## a11y_hidden
+
+<%name%> element should not be hidden
+
+## a11y_incorrect_aria_attribute_type_boolean
+
+The value of '%attribute%' must be either 'true' or 'false'
+
+## a11y_incorrect_aria_attribute_type_integer
+
+The value of '%attribute%' must be an integer
+
+## a11y_incorrect_aria_attribute_type_id
+
+The value of '%attribute%' must be a string that represents a DOM element ID
+
+## a11y_incorrect_aria_attribute_type_idlist
+
+The value of '%attribute%' must be a space-separated list of strings that represent DOM element IDs
+
+## a11y_incorrect_aria_attribute_type_tristate
+
+The value of '%attribute%' must be exactly one of true, false, or mixed
+
+## a11y_incorrect_aria_attribute_type_token
+
+The value of '%attribute%' must be exactly one of %values%
+
+## a11y_incorrect_aria_attribute_type_tokenlist
+
+The value of '%attribute%' must be a space-separated list of one or more of %values%
+
+## a11y_incorrect_aria_attribute_type
+
+The value of '%attribute%' must be of type %type%
+
+## a11y_aria_activedescendant_has_tabindex
+
+Elements with attribute aria-activedescendant should have tabindex value
+
+## a11y_misplaced_role
+
+<%name%> should not have role attribute
+
+## a11y_no_abstract_role
+
+Abstract role '%role%' is forbidden
+
+## a11y_unknown_role
+
+Unknown role '%role%'
+
+## a11y_unknown_role_suggestion
+
+Unknown role '%role%'. Did you mean '%suggestion%'?
+
+## a11y_no_redundant_roles
+
+Redundant role '%role%'
+
+## a11y_role_has_required_aria_props
+
+Elements with the ARIA role "%role%" must have the following attributes defined: %props%
+
+## a11y_interactive_supports_focus
+
+Elements with the '%role%' interactive role must have a tabindex value.
+
+## a11y_no_interactive_element_to_noninteractive_role
+
+<%element%> cannot have role '%role%'
+
+## a11y_no_noninteractive_element_to_interactive_role
+
+Non-interactive element <%element%> cannot have interactive role '%role%'
+
+## a11y_accesskey
+
+Avoid using accesskey
+
+## a11y_autofocus
+
+Avoid using autofocus
+
+## a11y_misplaced_scope
+
+The scope attribute should only be used with <th> elements
+
+## a11y_positive_tabindex
+
+Avoid tabindex values above zero
+
+## a11y_click_events_have_key_events
+
+Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type="button"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.
+
+## a11y_no_noninteractive_tabindex
+
+noninteractive element cannot have nonnegative tabIndex value
+
+## a11y_role_supports_aria_props
+
+The attribute '%attribute%' is not supported by the role '%role%'
+
+## a11y_role_supports_aria_props_implicit
+
+The attribute '%attribute%' is not supported by the role '%role%'. This role is implicit on the element <%name%>
+
+## a11y_no_noninteractive_element_interactions
+
+Non-interactive element <%element%> should not be assigned mouse or keyboard event listeners.
+
+## a11y_no_static_element_interactions
+
+<%element%> with a %handler% handler must have an ARIA role
+
+## a11y_invalid_attribute
+
+'%href_value%' is not a valid %href_attribute% attribute
+
+## a11y_missing_attribute
+
+<%name%> element should have %article% %sequence% attribute
+
+## a11y_autocomplete_valid
+
+The value '%value%' is not supported by the attribute 'autocomplete' on element <input type="%type%">
+
+## a11y_img_redundant_alt
+
+Screenreaders already announce <img> elements as an image.
+
+## a11y_label_has_associated_control
+
+A form label must be associated with a control.
+
+## a11y_media_has_caption
+
+<video> elements must have a <track kind="captions">
+
+## a11y_distracting_elements
+
+Avoid <%name%> elements
+
+## a11y_figcaption_parent
+
+`<figcaption>` must be an immediate child of `<figure>`
+
+## a11y_figcaption_index
+
+`<figcaption>` must be first or last child of `<figure>`
+
+## a11y_mouse_events_have_key_events
+
+'%event%' event must be accompanied by '%accompanied_by%' event
+
+## a11y_missing_content
+
+<%name%> element should have child content
diff --git a/packages/svelte/messages/compile-warnings/attributes.md b/packages/svelte/messages/compile-warnings/attributes.md
new file mode 100644
index 0000000000..dba95975e8
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/attributes.md
@@ -0,0 +1,15 @@
+## avoid_is
+
+The "is" attribute is not supported cross-browser and should be avoided
+
+## global_event_reference
+
+You are referencing globalThis.%name%. Did you forget to declare a variable with that name?
+
+## illegal_attribute_character
+
+Attributes should not contain ':' characters to prevent ambiguity with Svelte directives
+
+## invalid_html_attribute
+
+'%wrong%' is not a valid HTML attribute. Did you mean '%right%'?
diff --git a/packages/svelte/messages/compile-warnings/block.md b/packages/svelte/messages/compile-warnings/block.md
new file mode 100644
index 0000000000..bf4f07c31e
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/block.md
@@ -0,0 +1,3 @@
+## empty_block
+
+Empty block
diff --git a/packages/svelte/messages/compile-warnings/components.md b/packages/svelte/messages/compile-warnings/components.md
new file mode 100644
index 0000000000..f13f105a68
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/components.md
@@ -0,0 +1,3 @@
+## component_name_lowercase
+
+<%name%> will be treated as an HTML element unless it begins with a capital letter
\ No newline at end of file
diff --git a/packages/svelte/messages/compile-warnings/css.md b/packages/svelte/messages/compile-warnings/css.md
new file mode 100644
index 0000000000..1272fe69a1
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/css.md
@@ -0,0 +1,3 @@
+## css_unused_selector
+
+Unused CSS selector "%name%"
diff --git a/packages/svelte/messages/compile-warnings/legacy.md b/packages/svelte/messages/compile-warnings/legacy.md
new file mode 100644
index 0000000000..c87d717d2d
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/legacy.md
@@ -0,0 +1,19 @@
+## no_reactive_declaration
+
+Reactive declarations only exist at the top level of the instance script
+
+## module_script_reactive_declaration
+
+All dependencies of the reactive declaration are declared in a module script and will not be reactive
+
+## unused_export_let
+
+Component has unused export property '%name%'. If it is for external reference only, please consider using `export const %name%`
+
+## deprecated_slot_element
+
+Using <slot> to render parent content is deprecated. Use {@render ...} tags instead.
+
+## deprecated_event_handler
+
+Using on:%name% to listen to the %name% event is is deprecated. Use the event attribute on%name% instead.
diff --git a/packages/svelte/messages/compile-warnings/misc.md b/packages/svelte/messages/compile-warnings/misc.md
new file mode 100644
index 0000000000..dfdf6bdef2
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/misc.md
@@ -0,0 +1,3 @@
+## invalid_self_closing_tag
+
+Self-closing HTML tags for non-void elements are ambiguous — use <%name% ...></%name%> rather than <%name% ... />
\ No newline at end of file
diff --git a/packages/svelte/messages/compile-warnings/options.md b/packages/svelte/messages/compile-warnings/options.md
new file mode 100644
index 0000000000..0b970fb26c
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/options.md
@@ -0,0 +1,3 @@
+## missing_custom_element_compile_option
+
+The 'customElement' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?
diff --git a/packages/svelte/messages/compile-warnings/performance.md b/packages/svelte/messages/compile-warnings/performance.md
new file mode 100644
index 0000000000..b39511370d
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/performance.md
@@ -0,0 +1,7 @@
+## avoid_inline_class
+
+Avoid 'new class' — instead, declare the class at the top level scope
+
+## avoid_nested_class
+
+Avoid declaring classes below the top level scope
\ No newline at end of file
diff --git a/packages/svelte/messages/compile-warnings/runes.md b/packages/svelte/messages/compile-warnings/runes.md
new file mode 100644
index 0000000000..a29d6c41b5
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/runes.md
@@ -0,0 +1,19 @@
+## store_with_rune_name
+
+It looks like you're using the `$%name%` rune, but there is a local binding called `%name%`. Referencing a local variable with a `$` prefix will create a store subscription. Please rename `%name%` to avoid the ambiguity
+
+## non_state_reference
+
+`%name%` is updated, but is not declared with `$state(...)`. Changing its value will not correctly trigger updates
+
+## derived_iife
+
+Use `$derived.by(() => {...})` instead of `$derived((() => {...})())`
+
+## invalid_props_declaration
+
+Component properties are declared using `$props()` in runes mode. Did you forget to call the function?
+
+## invalid_bindable_declaration
+
+Bindable component properties are declared using `$bindable()` in runes mode. Did you forget to call the function?
diff --git a/packages/svelte/messages/compile-warnings/state.md b/packages/svelte/messages/compile-warnings/state.md
new file mode 100644
index 0000000000..f77fbe514e
--- /dev/null
+++ b/packages/svelte/messages/compile-warnings/state.md
@@ -0,0 +1,7 @@
+## static_state_reference
+
+State referenced in its own scope will never update. Did you mean to reference it inside a closure?
+
+## invalid_rest_eachblock_binding
+
+The rest operator (...) will create a new object and binding '%name%' with the original object will not work
\ No newline at end of file
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 11b8c7a46c..ff2640b432 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -99,8 +99,8 @@
     "templating"
   ],
   "scripts": {
-    "build": "rollup -c && pnpm generate:types && node scripts/check-treeshakeability.js",
-    "dev": "rollup -cw",
+    "build": "node scripts/process-messages && rollup -c && pnpm generate:types && node scripts/check-treeshakeability.js",
+    "dev": "node scripts/process-messages && rollup -cw",
     "check": "tsc && cd ./tests/types && tsc",
     "check:watch": "tsc --watch",
     "generate:version": "node ./scripts/generate-version.js",
diff --git a/packages/svelte/scripts/process-messages/index.js b/packages/svelte/scripts/process-messages/index.js
index 52cb23aec3..80c3a811d9 100644
--- a/packages/svelte/scripts/process-messages/index.js
+++ b/packages/svelte/scripts/process-messages/index.js
@@ -111,12 +111,20 @@ function transform(name, dest) {
 				const value = node.value
 					.split('\n')
 					.map((line) => {
+						if (line === ' * MESSAGE') {
+							return message
+								.split('\n')
+								.map((line) => ` * ${line}`)
+								.join('\n');
+						}
+
 						if (line.includes('PARAMETER')) {
 							return vars.map((name) => ` * @param {string} ${name}`).join('\n');
 						}
 
 						return line;
 					})
+					.filter((x) => x !== '')
 					.join('\n');
 
 				if (value !== node.value) {
@@ -168,7 +176,7 @@ function transform(name, dest) {
 					for (let i = 0; i < parts.length; i += 1) {
 						const part = parts[i];
 						if (i % 2 === 0) {
-							const str = part.replace(/(`|\$)/g, '\\$1');
+							const str = part.replace(/(`|\${)/g, '\\$1');
 							quasis.push({
 								type: 'TemplateElement',
 								value: { raw: str, cooked: str },
@@ -211,3 +219,4 @@ function transform(name, dest) {
 }
 
 transform('compile-errors', 'src/compiler/errors.js');
+transform('compile-warnings', 'src/compiler/warnings.js');
diff --git a/packages/svelte/scripts/process-messages/templates/compile-errors.js b/packages/svelte/scripts/process-messages/templates/compile-errors.js
index 96dcb72b3f..cd4d0d56ed 100644
--- a/packages/svelte/scripts/process-messages/templates/compile-errors.js
+++ b/packages/svelte/scripts/process-messages/templates/compile-errors.js
@@ -47,7 +47,6 @@ export class CompileError extends Error {
 }
 
 /**
- *
  * @param {null | number | NodeLike} node
  * @param {string} code
  * @param {string} message
@@ -65,6 +64,7 @@ function e(node, code, message) {
 }
 
 /**
+ * MESSAGE
  * @param {null | number | NodeLike} node
  * @param {string} PARAMETER
  * @returns {never}
diff --git a/packages/svelte/scripts/process-messages/templates/compile-warnings.js b/packages/svelte/scripts/process-messages/templates/compile-warnings.js
new file mode 100644
index 0000000000..e9a0ad3a7d
--- /dev/null
+++ b/packages/svelte/scripts/process-messages/templates/compile-warnings.js
@@ -0,0 +1,52 @@
+import { getLocator } from 'locate-character';
+
+/** @typedef {{ start?: number, end?: number }} NodeLike */
+
+/** @type {import('#compiler').Warning[]} */
+let warnings = [];
+
+/** @type {string | undefined} */
+let filename;
+
+let locator = getLocator('', { offsetLine: 1 });
+
+/**
+ * @param {{
+ *   source: string;
+ *   filename: string | undefined;
+ * }} options
+ * @returns {import('#compiler').Warning[]}
+ */
+export function reset_warnings(options) {
+	filename = options.filename;
+	locator = getLocator(options.source, { offsetLine: 1 });
+
+	return (warnings = []);
+}
+
+/**
+ * @param {null | NodeLike} node
+ * @param {string} code
+ * @param {string} message
+ */
+function w(node, code, message) {
+	// @ts-expect-error
+	if (node.ignores?.has(code)) return;
+
+	warnings.push({
+		code,
+		message,
+		filename,
+		start: node?.start !== undefined ? locator(node.start) : undefined,
+		end: node?.end !== undefined ? locator(node.end) : undefined
+	});
+}
+
+/**
+ * MESSAGE
+ * @param {null | NodeLike} node
+ * @param {string} PARAMETER
+ */
+export function CODE(node, PARAMETER) {
+	w(node, 'CODE', MESSAGE);
+}
diff --git a/packages/svelte/src/compiler/errors.js b/packages/svelte/src/compiler/errors.js
index ee2a961868..761478c24c 100644
--- a/packages/svelte/src/compiler/errors.js
+++ b/packages/svelte/src/compiler/errors.js
@@ -44,7 +44,6 @@ export class CompileError extends Error {
 }
 
 /**
- *
  * @param {null | number | NodeLike} node
  * @param {string} code
  * @param {string} message
@@ -58,8 +57,8 @@ function e(node, code, message) {
 }
 
 /**
+ * Attribute shorthand cannot be empty
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function empty_attribute_shorthand(node) {
@@ -67,8 +66,8 @@ export function empty_attribute_shorthand(node) {
 }
 
 /**
+ * Attributes need to be unique
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function duplicate_attribute(node) {
@@ -76,8 +75,8 @@ export function duplicate_attribute(node) {
 }
 
 /**
+ * Event attribute must be a JavaScript expression, not a string
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_event_attribute_value(node) {
@@ -85,6 +84,7 @@ export function invalid_event_attribute_value(node) {
 }
 
 /**
+ * '%name%' is not a valid attribute name
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -94,8 +94,8 @@ export function invalid_attribute_name(node, name) {
 }
 
 /**
+ * An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function animation_invalid_placement(node) {
@@ -103,8 +103,8 @@ export function animation_invalid_placement(node) {
 }
 
 /**
+ * An element that uses the `animate:` directive must be the only child of a keyed `{#each ...}` block. Did you forget to add a key to your each block?
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function animation_missing_key(node) {
@@ -112,8 +112,8 @@ export function animation_missing_key(node) {
 }
 
 /**
+ * An element can only have one 'animate' directive
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function animation_duplicate(node) {
@@ -121,6 +121,7 @@ export function animation_duplicate(node) {
 }
 
 /**
+ * Valid event modifiers are %list%
  * @param {null | number | NodeLike} node
  * @param {string} list
  * @returns {never}
@@ -130,8 +131,8 @@ export function invalid_event_modifier(node, list) {
 }
 
 /**
+ * Event modifiers other than 'once' can only be used on DOM elements
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_component_event_modifier(node) {
@@ -139,6 +140,7 @@ export function invalid_component_event_modifier(node) {
 }
 
 /**
+ * The '%modifier1%' and '%modifier2%' modifiers cannot be used together
  * @param {null | number | NodeLike} node
  * @param {string} modifier1
  * @param {string} modifier2
@@ -149,6 +151,7 @@ export function invalid_event_modifier_combination(node, modifier1, modifier2) {
 }
 
 /**
+ * Cannot use multiple `%type%:` directives on a single element
  * @param {null | number | NodeLike} node
  * @param {string} type
  * @returns {never}
@@ -158,6 +161,7 @@ export function transition_duplicate(node, type) {
 }
 
 /**
+ * Cannot use `%type%:` alongside existing `%existing%:` directive
  * @param {null | number | NodeLike} node
  * @param {string} type
  * @param {string} existing
@@ -168,8 +172,8 @@ export function transition_conflict(node, type, existing) {
 }
 
 /**
+ * `let:` directive at invalid position
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_let_directive_placement(node) {
@@ -177,8 +181,8 @@ export function invalid_let_directive_placement(node) {
 }
 
 /**
+ * Invalid 'style:' modifier. Valid modifiers are: 'important'
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_style_directive_modifier(node) {
@@ -186,8 +190,8 @@ export function invalid_style_directive_modifier(node) {
 }
 
 /**
+ * Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_sequence_expression(node) {
@@ -195,8 +199,8 @@ export function invalid_sequence_expression(node) {
 }
 
 /**
+ * Can only bind to an Identifier or MemberExpression
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_binding_expression(node) {
@@ -204,8 +208,8 @@ export function invalid_binding_expression(node) {
 }
 
 /**
+ * Can only bind to state or props
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_binding_value(node) {
@@ -213,6 +217,7 @@ export function invalid_binding_value(node) {
 }
 
 /**
+ * `bind:%name%` can only be used with %elements%
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @param {string} elements
@@ -223,6 +228,7 @@ export function bind_invalid_target(node, name, elements) {
 }
 
 /**
+ * `bind:%name%` is not a valid binding
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -232,6 +238,7 @@ export function bind_invalid(node, name) {
 }
 
 /**
+ * `bind:%name%` is not a valid binding. %explanation%
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @param {string} explanation
@@ -242,8 +249,8 @@ export function bind_invalid_detailed(node, name, explanation) {
 }
 
 /**
+ * 'type' attribute must be a static text value if input uses two-way binding
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_type_attribute(node) {
@@ -251,8 +258,8 @@ export function invalid_type_attribute(node) {
 }
 
 /**
+ * 'multiple' attribute must be static if select uses two-way binding
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_multiple_attribute(node) {
@@ -260,8 +267,8 @@ export function invalid_multiple_attribute(node) {
 }
 
 /**
+ * 'contenteditable' attribute is required for textContent, innerHTML and innerText two-way bindings
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function missing_contenteditable_attribute(node) {
@@ -269,8 +276,8 @@ export function missing_contenteditable_attribute(node) {
 }
 
 /**
+ * 'contenteditable' attribute cannot be dynamic if element uses two-way binding
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function dynamic_contenteditable_attribute(node) {
@@ -278,6 +285,7 @@ export function dynamic_contenteditable_attribute(node) {
 }
 
 /**
+ * Invalid compiler option: %msg%
  * @param {null | number | NodeLike} node
  * @param {string} msg
  * @returns {never}
@@ -287,6 +295,7 @@ export function invalid_compiler_option(node, msg) {
 }
 
 /**
+ * Invalid compiler option: %msg%
  * @param {null | number | NodeLike} node
  * @param {string} msg
  * @returns {never}
@@ -296,8 +305,8 @@ export function removed_compiler_option(node, msg) {
 }
 
 /**
+ * This type of directive is not valid on components
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_component_directive(node) {
@@ -305,8 +314,8 @@ export function invalid_component_directive(node) {
 }
 
 /**
+ * {@const} must be the immediate child of {#snippet}, {#if}, {:else if}, {:else}, {#each}, {:then}, {:catch}, <svelte:fragment> or <Component>
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_const_placement(node) {
@@ -314,8 +323,8 @@ export function invalid_const_placement(node) {
 }
 
 /**
+ * Declaration cannot be empty
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_empty_declaration(node) {
@@ -323,8 +332,8 @@ export function invalid_css_empty_declaration(node) {
 }
 
 /**
+ * A :global {...} block cannot be part of a selector list with more than one item
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_global_block_list(node) {
@@ -332,8 +341,8 @@ export function invalid_css_global_block_list(node) {
 }
 
 /**
+ * A :global {...} block cannot modify an existing selector
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_global_block_modifier(node) {
@@ -341,6 +350,7 @@ export function invalid_css_global_block_modifier(node) {
 }
 
 /**
+ * A :global {...} block cannot follow a %name% combinator
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -350,8 +360,8 @@ export function invalid_css_global_block_combinator(node, name) {
 }
 
 /**
+ * A :global {...} block can only contain rules, not declarations
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_global_block_declaration(node) {
@@ -359,8 +369,8 @@ export function invalid_css_global_block_declaration(node) {
 }
 
 /**
+ * :global(...) can be at the start or end of a selector sequence, but not in the middle
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_global_placement(node) {
@@ -368,8 +378,8 @@ export function invalid_css_global_placement(node) {
 }
 
 /**
+ * :global(...) must contain exactly one selector
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_global_selector(node) {
@@ -377,8 +387,8 @@ export function invalid_css_global_selector(node) {
 }
 
 /**
+ * :global(...) must not contain type or universal selectors when used in a compound selector
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_global_selector_list(node) {
@@ -386,8 +396,8 @@ export function invalid_css_global_selector_list(node) {
 }
 
 /**
+ * :global(...) must not be followed with a type selector
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_type_selector_placement(node) {
@@ -395,8 +405,8 @@ export function invalid_css_type_selector_placement(node) {
 }
 
 /**
+ * Invalid selector
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_selector(node) {
@@ -404,8 +414,8 @@ export function invalid_css_selector(node) {
 }
 
 /**
+ * Expected a valid CSS identifier
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_identifier(node) {
@@ -413,8 +423,8 @@ export function invalid_css_identifier(node) {
 }
 
 /**
+ * Nesting selectors can only be used inside a rule
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_nesting_selector(node) {
@@ -422,8 +432,8 @@ export function invalid_nesting_selector(node) {
 }
 
 /**
+ * Declaration cannot be empty
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_css_declaration(node) {
@@ -431,8 +441,8 @@ export function invalid_css_declaration(node) {
 }
 
 /**
+ * A `<textarea>` can have either a value attribute or (equivalently) child content, but not both
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_textarea_content(node) {
@@ -440,8 +450,8 @@ export function invalid_textarea_content(node) {
 }
 
 /**
+ * Void elements cannot have children or closing tags
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_void_content(node) {
@@ -449,6 +459,7 @@ export function invalid_void_content(node) {
 }
 
 /**
+ * <%name%> cannot have children
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -458,8 +469,8 @@ export function invalid_element_content(node, name) {
 }
 
 /**
+ * Expected valid tag name
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_tag_name(node) {
@@ -467,6 +478,7 @@ export function invalid_tag_name(node) {
 }
 
 /**
+ * %thing% is invalid inside <%parent%>
  * @param {null | number | NodeLike} node
  * @param {string} thing
  * @param {string} parent
@@ -477,8 +489,8 @@ export function invalid_node_placement(node, thing, parent) {
 }
 
 /**
+ * `<title>` cannot have attributes nor directives
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function illegal_title_attribute(node) {
@@ -486,8 +498,8 @@ export function illegal_title_attribute(node) {
 }
 
 /**
+ * `<title>` can only contain text and {tags}
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_title_content(node) {
@@ -495,6 +507,7 @@ export function invalid_title_content(node) {
 }
 
 /**
+ * Cyclical dependency detected: %cycle%
  * @param {null | number | NodeLike} node
  * @param {string} cycle
  * @returns {never}
@@ -504,6 +517,7 @@ export function cyclical_reactive_declaration(node, cycle) {
 }
 
 /**
+ * `<%name%>` was left open
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -513,8 +527,8 @@ export function unclosed_element(node, name) {
 }
 
 /**
+ * Block was left open
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function unclosed_block(node) {
@@ -522,8 +536,8 @@ export function unclosed_block(node) {
 }
 
 /**
+ * Unexpected block closing tag
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function unexpected_block_close(node) {
@@ -531,8 +545,8 @@ export function unexpected_block_close(node) {
 }
 
 /**
+ * Unexpected end of input
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function unexpected_eof(node) {
@@ -540,6 +554,7 @@ export function unexpected_eof(node) {
 }
 
 /**
+ * %message%
  * @param {null | number | NodeLike} node
  * @param {string} message
  * @returns {never}
@@ -549,6 +564,7 @@ export function js_parse_error(node, message) {
 }
 
 /**
+ * Expected token %token%
  * @param {null | number | NodeLike} node
  * @param {string} token
  * @returns {never}
@@ -558,6 +574,7 @@ export function expected_token(node, token) {
 }
 
 /**
+ * '%word%' is a reserved word in JavaScript and cannot be used here
  * @param {null | number | NodeLike} node
  * @param {string} word
  * @returns {never}
@@ -567,8 +584,8 @@ export function unexpected_reserved_word(node, word) {
 }
 
 /**
+ * Expected whitespace
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function missing_whitespace(node) {
@@ -576,8 +593,8 @@ export function missing_whitespace(node) {
 }
 
 /**
+ * Expected identifier or destructure pattern
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function expected_pattern(node) {
@@ -585,8 +602,8 @@ export function expected_pattern(node) {
 }
 
 /**
+ * If the context attribute is supplied, its value must be "module"
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_script_context(node) {
@@ -594,8 +611,8 @@ export function invalid_script_context(node) {
 }
 
 /**
+ * 'elseif' should be 'else if'
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_elseif(node) {
@@ -603,8 +620,8 @@ export function invalid_elseif(node) {
 }
 
 /**
+ * {:...} block is invalid at this position (did you forget to close the preceeding element or block?)
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_continuing_block_placement(node) {
@@ -612,6 +629,7 @@ export function invalid_continuing_block_placement(node) {
 }
 
 /**
+ * %child% block must be a child of %parent%
  * @param {null | number | NodeLike} node
  * @param {string} child
  * @param {string} parent
@@ -622,6 +640,7 @@ export function invalid_block_missing_parent(node, child, parent) {
 }
 
 /**
+ * %name% cannot appear more than once within a block
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -631,8 +650,8 @@ export function duplicate_block_part(node, name) {
 }
 
 /**
+ * Expected 'if', 'each', 'await', 'key' or 'snippet'
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function expected_block_type(node) {
@@ -640,8 +659,8 @@ export function expected_block_type(node) {
 }
 
 /**
+ * Expected an identifier
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function expected_identifier(node) {
@@ -649,8 +668,8 @@ export function expected_identifier(node) {
 }
 
 /**
+ * {@debug ...} arguments must be identifiers, not arbitrary expressions
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_debug(node) {
@@ -658,8 +677,8 @@ export function invalid_debug(node) {
 }
 
 /**
+ * {@const ...} must be an assignment
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_const(node) {
@@ -667,6 +686,7 @@ export function invalid_const(node) {
 }
 
 /**
+ * {#%name% ...} block cannot be %location%
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @param {string} location
@@ -677,6 +697,7 @@ export function invalid_block_placement(node, name, location) {
 }
 
 /**
+ * {@%name% ...} tag cannot be %location%
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @param {string} location
@@ -687,8 +708,8 @@ export function invalid_tag_placement(node, name, location) {
 }
 
 /**
+ * Expected attribute value
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function missing_attribute_value(node) {
@@ -696,6 +717,7 @@ export function missing_attribute_value(node) {
 }
 
 /**
+ * Expected closing %delimiter% character
  * @param {null | number | NodeLike} node
  * @param {string} delimiter
  * @returns {never}
@@ -705,8 +727,8 @@ export function unclosed_attribute_value(node, delimiter) {
 }
 
 /**
+ * Directive value must be a JavaScript expression enclosed in curly braces
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_directive_value(node) {
@@ -714,6 +736,7 @@ export function invalid_directive_value(node) {
 }
 
 /**
+ * %type% name cannot be empty
  * @param {null | number | NodeLike} node
  * @param {string} type
  * @returns {never}
@@ -723,6 +746,7 @@ export function empty_directive_name(node, type) {
 }
 
 /**
+ * </%name%> attempted to close an element that was not open
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -732,6 +756,7 @@ export function invalid_closing_tag(node, name) {
 }
 
 /**
+ * </%name%> attempted to close element that was already automatically closed by <%reason%> (cannot nest <%reason%> inside <%name%>)
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @param {string} reason
@@ -742,8 +767,8 @@ export function invalid_closing_tag_after_autoclose(node, name, reason) {
 }
 
 /**
+ * The $ name is reserved, and cannot be used for variables and imports
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_dollar_binding(node) {
@@ -751,8 +776,8 @@ export function invalid_dollar_binding(node) {
 }
 
 /**
+ * The $ prefix is reserved, and cannot be used for variables and imports
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_dollar_prefix(node) {
@@ -760,8 +785,8 @@ export function invalid_dollar_prefix(node) {
 }
 
 /**
+ * The $ name is reserved. To reference a global variable called $, use globalThis.$
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_dollar_global(node) {
@@ -769,8 +794,8 @@ export function invalid_dollar_global(node) {
 }
 
 /**
+ * Cannot reference store value inside `<script context="module">`
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function illegal_subscription(node) {
@@ -778,8 +803,8 @@ export function illegal_subscription(node) {
 }
 
 /**
+ * A component can have a single top-level `<style>` element
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function duplicate_style_element(node) {
@@ -787,8 +812,8 @@ export function duplicate_style_element(node) {
 }
 
 /**
+ * A component can have a single top-level `<script>` element and/or a single top-level `<script context="module">` element
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function duplicate_script_element(node) {
@@ -796,8 +821,8 @@ export function duplicate_script_element(node) {
 }
 
 /**
+ * {@render ...} tags can only contain call expressions
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_render_expression(node) {
@@ -805,8 +830,8 @@ export function invalid_render_expression(node) {
 }
 
 /**
+ * expected at most one argument
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_render_arguments(node) {
@@ -814,8 +839,8 @@ export function invalid_render_arguments(node) {
 }
 
 /**
+ * Calling a snippet function using apply, bind or call is not allowed
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_render_call(node) {
@@ -823,8 +848,8 @@ export function invalid_render_call(node) {
 }
 
 /**
+ * cannot use spread arguments in {@render ...} tags
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_render_spread_argument(node) {
@@ -832,8 +857,8 @@ export function invalid_render_spread_argument(node) {
 }
 
 /**
+ * snippets do not support rest parameters; use an array instead
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_snippet_rest_parameter(node) {
@@ -841,8 +866,8 @@ export function invalid_snippet_rest_parameter(node) {
 }
 
 /**
+ * Cannot use `$$props` in runes mode
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_legacy_props(node) {
@@ -850,8 +875,8 @@ export function invalid_legacy_props(node) {
 }
 
 /**
+ * Cannot use `$$restProps` in runes mode
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_legacy_rest_props(node) {
@@ -859,8 +884,8 @@ export function invalid_legacy_rest_props(node) {
 }
 
 /**
+ * `$:` is not allowed in runes mode, use `$derived` or `$effect` instead
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_legacy_reactive_statement(node) {
@@ -868,8 +893,8 @@ export function invalid_legacy_reactive_statement(node) {
 }
 
 /**
+ * Cannot use `export let` in runes mode — use $props instead
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_legacy_export(node) {
@@ -877,6 +902,7 @@ export function invalid_legacy_export(node) {
 }
 
 /**
+ * Cannot use %rune% rune in non-runes mode
  * @param {null | number | NodeLike} node
  * @param {string} rune
  * @returns {never}
@@ -886,8 +912,8 @@ export function invalid_rune_usage(node, rune) {
 }
 
 /**
+ * Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_state_export(node) {
@@ -895,8 +921,8 @@ export function invalid_state_export(node) {
 }
 
 /**
+ * Cannot export derived state from a module. To expose the current derived value, export a function returning its value
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_derived_export(node) {
@@ -904,8 +930,8 @@ export function invalid_derived_export(node) {
 }
 
 /**
+ * `$props()` can only be used with an object destructuring pattern
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_props_id(node) {
@@ -913,8 +939,8 @@ export function invalid_props_id(node) {
 }
 
 /**
+ * `$props()` assignment must not contain nested properties or computed keys
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_props_pattern(node) {
@@ -922,8 +948,8 @@ export function invalid_props_pattern(node) {
 }
 
 /**
+ * `$props()` can only be used at the top level of components as a variable declaration initializer
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_props_location(node) {
@@ -931,8 +957,8 @@ export function invalid_props_location(node) {
 }
 
 /**
+ * `$bindable()` can only be used inside a `$props()` declaration
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_bindable_location(node) {
@@ -940,6 +966,7 @@ export function invalid_bindable_location(node) {
 }
 
 /**
+ * `%rune%(...)` can only be used as a variable declaration initializer or a class field
  * @param {null | number | NodeLike} node
  * @param {string} rune
  * @returns {never}
@@ -949,8 +976,8 @@ export function invalid_state_location(node, rune) {
 }
 
 /**
+ * `$effect()` can only be used as an expression statement
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_effect_location(node) {
@@ -958,8 +985,8 @@ export function invalid_effect_location(node) {
 }
 
 /**
+ * `$host()` can only be used inside custom element component instances
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_host_location(node) {
@@ -967,6 +994,7 @@ export function invalid_host_location(node) {
 }
 
 /**
+ * Cannot assign to %thing%
  * @param {null | number | NodeLike} node
  * @param {string} thing
  * @returns {never}
@@ -976,6 +1004,7 @@ export function invalid_assignment(node, thing) {
 }
 
 /**
+ * Cannot bind to %thing%
  * @param {null | number | NodeLike} node
  * @param {string} thing
  * @returns {never}
@@ -985,6 +1014,7 @@ export function invalid_binding(node, thing) {
 }
 
 /**
+ * `%rune%` cannot be called with arguments
  * @param {null | number | NodeLike} node
  * @param {string} rune
  * @returns {never}
@@ -994,6 +1024,7 @@ export function invalid_rune_args(node, rune) {
 }
 
 /**
+ * `%rune%` must be called with %args%
  * @param {null | number | NodeLike} node
  * @param {string} rune
  * @param {string} args
@@ -1004,6 +1035,7 @@ export function invalid_rune_args_length(node, rune, args) {
 }
 
 /**
+ * %name% cannot be used in runes mode
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -1013,8 +1045,8 @@ export function invalid_runes_mode_import(node, name) {
 }
 
 /**
+ * Cannot use `$props()` more than once
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function duplicate_props_rune(node) {
@@ -1022,8 +1054,8 @@ export function duplicate_props_rune(node) {
 }
 
 /**
+ * Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_each_assignment(node) {
@@ -1031,8 +1063,8 @@ export function invalid_each_assignment(node) {
 }
 
 /**
+ * Cannot reassign or bind to snippet parameter
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_snippet_assignment(node) {
@@ -1040,8 +1072,8 @@ export function invalid_snippet_assignment(node) {
 }
 
 /**
+ * `$derived.call(...)` has been replaced with `$derived.by(...)`
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_derived_call(node) {
@@ -1049,8 +1081,8 @@ export function invalid_derived_call(node) {
 }
 
 /**
+ * Cannot have a property and a component export with the same name
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function conflicting_property_name(node) {
@@ -1058,8 +1090,8 @@ export function conflicting_property_name(node) {
 }
 
 /**
+ * `<slot>` can only receive attributes and (optionally) let directives
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_slot_element_attribute(node) {
@@ -1067,8 +1099,8 @@ export function invalid_slot_element_attribute(node) {
 }
 
 /**
+ * slot attribute must be a static value
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_slot_attribute(node) {
@@ -1076,8 +1108,8 @@ export function invalid_slot_attribute(node) {
 }
 
 /**
+ * `default` is a reserved word — it cannot be used as a slot name
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_slot_name_default(node) {
@@ -1085,8 +1117,8 @@ export function invalid_slot_name_default(node) {
 }
 
 /**
+ * slot attribute must be a static value
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_slot_name(node) {
@@ -1094,8 +1126,8 @@ export function invalid_slot_name(node) {
 }
 
 /**
+ * Element with a slot='...' attribute must be a child of a component or a descendant of a custom element
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_slot_placement(node) {
@@ -1103,6 +1135,7 @@ export function invalid_slot_placement(node) {
 }
 
 /**
+ * Duplicate slot name '%name%' in <%component%>
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @param {string} component
@@ -1113,8 +1146,8 @@ export function duplicate_slot_name(node, name, component) {
 }
 
 /**
+ * Found default slot content alongside an explicit slot="default"
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_default_slot_content(node) {
@@ -1122,8 +1155,8 @@ export function invalid_default_slot_content(node) {
 }
 
 /**
+ * Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function conflicting_children_snippet(node) {
@@ -1131,8 +1164,8 @@ export function conflicting_children_snippet(node) {
 }
 
 /**
+ * `<svelte:options>` can only receive static attributes
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_attribute(node) {
@@ -1140,8 +1173,8 @@ export function invalid_svelte_option_attribute(node) {
 }
 
 /**
+ * Unsupported `<svelte:option>` value for "namespace". Valid values are "html", "svg" or "foreign"
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_namespace(node) {
@@ -1149,8 +1182,8 @@ export function invalid_svelte_option_namespace(node) {
 }
 
 /**
+ * "tag" option is deprecated — use "customElement" instead
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function tag_option_deprecated(node) {
@@ -1158,8 +1191,8 @@ export function tag_option_deprecated(node) {
 }
 
 /**
+ * Unsupported `<svelte:option>` value for "runes". Valid values are true or false
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_runes(node) {
@@ -1167,8 +1200,8 @@ export function invalid_svelte_option_runes(node) {
 }
 
 /**
+ * Unsupported `<svelte:option>` value for "accessors". Valid values are true or false
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_accessors(node) {
@@ -1176,8 +1209,8 @@ export function invalid_svelte_option_accessors(node) {
 }
 
 /**
+ * Unsupported `<svelte:option>` value for "preserveWhitespace". Valid values are true or false
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_preserveWhitespace(node) {
@@ -1185,8 +1218,8 @@ export function invalid_svelte_option_preserveWhitespace(node) {
 }
 
 /**
+ * Unsupported `<svelte:option>` value for "immutable". Valid values are true or false
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_immutable(node) {
@@ -1194,8 +1227,8 @@ export function invalid_svelte_option_immutable(node) {
 }
 
 /**
+ * Tag name must be two or more words joined by the "-" character
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_tag_property(node) {
@@ -1203,8 +1236,8 @@ export function invalid_tag_property(node) {
 }
 
 /**
+ * "customElement" must be a string literal defining a valid custom element name or an object of the form { tag: string; shadow?: "open" | "none"; props?: { [key: string]: { attribute?: string; reflect?: boolean; type: .. } } }
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_option_customElement(node) {
@@ -1212,8 +1245,8 @@ export function invalid_svelte_option_customElement(node) {
 }
 
 /**
+ * "props" must be a statically analyzable object literal of the form "{ [key: string]: { attribute?: string; reflect?: boolean; type?: "String" | "Boolean" | "Number" | "Array" | "Object" }"
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_customElement_props_attribute(node) {
@@ -1221,8 +1254,8 @@ export function invalid_customElement_props_attribute(node) {
 }
 
 /**
+ * "shadow" must be either "open" or "none"
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_customElement_shadow_attribute(node) {
@@ -1230,6 +1263,7 @@ export function invalid_customElement_shadow_attribute(node) {
 }
 
 /**
+ * `<svelte:options>` unknown attribute '%name%'
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -1239,8 +1273,8 @@ export function unknown_svelte_option_attribute(node, name) {
 }
 
 /**
+ * `<svelte:head>` cannot have attributes nor directives
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function illegal_svelte_head_attribute(node) {
@@ -1248,8 +1282,8 @@ export function illegal_svelte_head_attribute(node) {
 }
 
 /**
+ * `<svelte:fragment>` can only have a slot attribute and (optionally) a let: directive
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_fragment_attribute(node) {
@@ -1257,8 +1291,8 @@ export function invalid_svelte_fragment_attribute(node) {
 }
 
 /**
+ * `<svelte:fragment>` slot attribute must have a static value
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_fragment_slot(node) {
@@ -1266,8 +1300,8 @@ export function invalid_svelte_fragment_slot(node) {
 }
 
 /**
+ * `<svelte:fragment>` must be the direct child of a component
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_fragment_placement(node) {
@@ -1275,6 +1309,7 @@ export function invalid_svelte_fragment_placement(node) {
 }
 
 /**
+ * <%name%> tags cannot be inside elements or blocks
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -1284,6 +1319,7 @@ export function invalid_svelte_element_placement(node, name) {
 }
 
 /**
+ * A component can only have one <%name%> element
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -1293,8 +1329,8 @@ export function duplicate_svelte_element(node, name) {
 }
 
 /**
+ * `<svelte:self>` components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_self_placement(node) {
@@ -1302,8 +1338,8 @@ export function invalid_self_placement(node) {
 }
 
 /**
+ * `<svelte:element>` must have a 'this' attribute
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function missing_svelte_element_definition(node) {
@@ -1311,8 +1347,8 @@ export function missing_svelte_element_definition(node) {
 }
 
 /**
+ * `<svelte:component>` must have a 'this' attribute
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function missing_svelte_component_definition(node) {
@@ -1320,8 +1356,8 @@ export function missing_svelte_component_definition(node) {
 }
 
 /**
+ * Invalid element definition — must be an {expression}
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_element_definition(node) {
@@ -1329,8 +1365,8 @@ export function invalid_svelte_element_definition(node) {
 }
 
 /**
+ * Invalid component definition — must be an {expression}
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function invalid_svelte_component_definition(node) {
@@ -1338,6 +1374,7 @@ export function invalid_svelte_component_definition(node) {
 }
 
 /**
+ * Valid `<svelte:...>` tag names are %list%
  * @param {null | number | NodeLike} node
  * @param {string} list
  * @returns {never}
@@ -1347,8 +1384,8 @@ export function invalid_svelte_tag(node, list) {
 }
 
 /**
+ * Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migrate towards `{@render ...}` tags completely.
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function conflicting_slot_usage(node) {
@@ -1356,6 +1393,7 @@ export function conflicting_slot_usage(node) {
 }
 
 /**
+ * `%name%` is an illegal variable name. To reference a global variable called `%name%`, use `globalThis.%name%`
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -1365,6 +1403,7 @@ export function illegal_global(node, name) {
 }
 
 /**
+ * `%name%` has already been declared
  * @param {null | number | NodeLike} node
  * @param {string} name
  * @returns {never}
@@ -1374,8 +1413,8 @@ export function duplicate_declaration(node, name) {
 }
 
 /**
+ * A component cannot have a default export
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function default_export(node) {
@@ -1383,8 +1422,8 @@ export function default_export(node) {
 }
 
 /**
+ * Cannot declare same variable name which is imported inside `<script context="module">`
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function illegal_variable_declaration(node) {
@@ -1392,8 +1431,8 @@ export function illegal_variable_declaration(node) {
 }
 
 /**
+ * Cannot subscribe to stores that are not declared at the top level of the component
  * @param {null | number | NodeLike} node
-
  * @returns {never}
  */
 export function illegal_store_subscription(node) {
diff --git a/packages/svelte/src/compiler/index.js b/packages/svelte/src/compiler/index.js
index eee35bf2a8..c2516a2e5f 100644
--- a/packages/svelte/src/compiler/index.js
+++ b/packages/svelte/src/compiler/index.js
@@ -8,6 +8,7 @@ import { remove_typescript_nodes } from './phases/1-parse/remove_typescript_node
 import { analyze_component, analyze_module } from './phases/2-analyze/index.js';
 import { transform_component, transform_module } from './phases/3-transform/index.js';
 import { validate_component_options, validate_module_options } from './validate-options.js';
+import { reset_warnings } from './warnings.js';
 export { default as preprocess } from './preprocess/index.js';
 
 /**
@@ -20,6 +21,7 @@ export { default as preprocess } from './preprocess/index.js';
  */
 export function compile(source, options) {
 	try {
+		const warnings = reset_warnings({ source, filename: options.filename });
 		const validated = validate_component_options(options, '');
 		let parsed = _parse(source);
 
@@ -44,6 +46,7 @@ export function compile(source, options) {
 		const analysis = analyze_component(parsed, source, combined_options);
 
 		const result = transform_component(analysis, source, combined_options);
+		result.warnings = warnings;
 		result.ast = to_public_ast(source, parsed, options.modernAst);
 		return result;
 	} catch (e) {
@@ -65,9 +68,12 @@ export function compile(source, options) {
  */
 export function compileModule(source, options) {
 	try {
+		const warnings = reset_warnings({ source, filename: options.filename });
 		const validated = validate_module_options(options, '');
 		const analysis = analyze_module(parse_acorn(source, false), validated);
-		return transform_module(analysis, source, validated);
+		const result = transform_module(analysis, source, validated);
+		result.warnings = warnings;
+		return result;
 	} catch (e) {
 		if (e instanceof CompileError) {
 			handle_compile_error(e, options.filename, source);
diff --git a/packages/svelte/src/compiler/phases/2-analyze/a11y.js b/packages/svelte/src/compiler/phases/2-analyze/a11y.js
index 7d01c6fdb3..0b54af4b85 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/a11y.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/a11y.js
@@ -7,11 +7,12 @@ import {
 	regex_starts_with_vowel,
 	regex_whitespaces
 } from '../patterns.js';
-import { warn } from '../../warnings.js';
+import * as w from '../../warnings.js';
 import fuzzymatch from '../1-parse/utils/fuzzymatch.js';
 import { is_event_attribute, is_text_attribute } from '../../utils/ast.js';
 import { ContentEditableBindings } from '../constants.js';
 import { walk } from 'zimmerframe';
+import { list } from '../../utils/string.js';
 
 const aria_roles = roles_map.keys();
 const abstract_roles = aria_roles.filter((role) => roles_map.get(role)?.abstract);
@@ -593,40 +594,53 @@ function is_parent(parent, elements) {
 }
 
 /**
+ * @param {import('#compiler').Attribute} attribute
+ * @param {import('aria-query').ARIAProperty} name
  * @param {import('aria-query').ARIAPropertyDefinition} schema
- * @param {string | boolean} value
- * @returns {boolean}
+ * @param {string | true | null} value
  */
-function is_valid_aria_attribute_value(schema, value) {
-	switch (schema.type) {
-		case 'boolean':
-			return typeof value === 'boolean';
-		case 'string':
-		case 'id':
-			return typeof value === 'string';
-		case 'tristate':
-			return typeof value === 'boolean' || value === 'mixed';
-		case 'integer':
-		case 'number':
-			return typeof value !== 'boolean' && isNaN(Number(value)) === false;
-		case 'token': // single token
-			return (
-				(schema.values || []).indexOf(typeof value === 'string' ? value.toLowerCase() : value) > -1
-			);
-		case 'idlist': // if list of ids, split each
-			return (
-				typeof value === 'string' &&
-				value.split(regex_whitespaces).every((id) => typeof id === 'string')
+function validate_aria_attribute_value(attribute, name, schema, value) {
+	const type = schema.type;
+	const is_string = typeof value === 'string';
+
+	if (value === null) return;
+	if (value === true) value = 'true'; // TODO this is actually incorrect, and we should fix it
+
+	if (type === 'boolean' && value !== 'true' && value !== 'false') {
+		w.a11y_incorrect_aria_attribute_type_boolean(attribute, name);
+	} else if (type === 'integer' && !Number.isInteger(+value)) {
+		w.a11y_incorrect_aria_attribute_type_integer(attribute, name);
+	} else if (type === 'number' && isNaN(+value)) {
+		w.a11y_incorrect_aria_attribute_type(attribute, name, 'number');
+	} else if ((type === 'string' || type === 'id') && !is_string) {
+		w.a11y_incorrect_aria_attribute_type(attribute, name, 'string');
+	} else if (type === 'idlist' && !is_string) {
+		w.a11y_incorrect_aria_attribute_type_idlist(attribute, name);
+	} else if (type === 'token') {
+		const values = (schema.values ?? []).map((value) => value.toString());
+		if (!values.includes(value.toLowerCase())) {
+			w.a11y_incorrect_aria_attribute_type_token(
+				attribute,
+				name,
+				list(values.map((v) => `"${v}"`))
 			);
-		case 'tokenlist': // if list of tokens, split each
-			return (
-				typeof value === 'string' &&
-				value
-					.split(regex_whitespaces)
-					.every((token) => (schema.values || []).indexOf(token.toLowerCase()) > -1)
+		}
+	} else if (type === 'tokenlist') {
+		const values = (schema.values ?? []).map((value) => value.toString());
+		if (
+			value
+				.toLowerCase()
+				.split(regex_whitespaces)
+				.some((value) => !values.includes(value))
+		) {
+			w.a11y_incorrect_aria_attribute_type_tokenlist(
+				attribute,
+				name,
+				list(values.map((v) => `"${v}"`))
 			);
-		default:
-			return false;
+		}
+	} else if (type === 'tristate' && value !== 'true' && value !== 'false' && value !== 'mixed') {
+		w.a11y_incorrect_aria_attribute_type_tristate(attribute, name);
 	}
 }
 
@@ -642,7 +656,8 @@ function warn_missing_attribute(node, attributes, name = node.name) {
 		attributes.length > 1
 			? attributes.slice(0, -1).join(', ') + ` or ${attributes[attributes.length - 1]}`
 			: attributes[0];
-	return /** @type {const} */ ([node, 'a11y-missing-attribute', name, article, sequence]);
+
+	w.a11y_missing_attribute(node, name, article, sequence);
 }
 
 /**
@@ -672,15 +687,6 @@ function check_element(node, state) {
 	// foreign namespace means elements can have completely different meanings, therefore we don't check them
 	if (state.options.namespace === 'foreign') return;
 
-	/**
-	 * @template {keyof import('../../warnings.js').AllWarnings} T
-	 * @param {{ start?: number, end?: number }} node
-	 * @param {T} code
-	 * @param  {Parameters<import('../../warnings.js').AllWarnings[T]>} args
-	 * @returns {void}
-	 */
-	const push_warning = (node, code, ...args) => warn(state.analysis.warnings, node, code, ...args);
-
 	/** @type {Map<string, import('#compiler').Attribute>} */
 	const attribute_map = new Map();
 
@@ -727,28 +733,35 @@ function check_element(node, state) {
 		if (name.startsWith('aria-')) {
 			if (invisible_elements.includes(node.name)) {
 				// aria-unsupported-elements
-				push_warning(attribute, 'a11y-aria-attributes', node.name);
+				w.a11y_aria_attributes(attribute, node.name);
 			}
 
 			const type = name.slice(5);
 			if (!aria_attributes.includes(type)) {
 				const match = fuzzymatch(type, aria_attributes);
-				push_warning(attribute, 'a11y-unknown-aria-attribute', type, match);
+				if (match) {
+					// TODO allow 'overloads' in messages, so that we can use the same code with and without suggestions
+					w.a11y_unknown_aria_attribute_suggestion(attribute, type, match);
+				} else {
+					w.a11y_unknown_aria_attribute(attribute, type);
+				}
 			}
 
 			if (name === 'aria-hidden' && regex_heading_tags.test(node.name)) {
-				push_warning(attribute, 'a11y-hidden', node.name);
+				w.a11y_hidden(attribute, node.name);
 			}
 
 			// aria-proptypes
 			let value = get_static_value(attribute);
-			if (value === 'true') value = true;
-			if (value === 'false') value = false;
-			if (value !== null && value !== undefined) {
-				const schema = aria.get(/** @type {import('aria-query').ARIAProperty} */ (name));
-				if (schema !== undefined && !is_valid_aria_attribute_value(schema, value)) {
-					push_warning(attribute, 'a11y-incorrect-aria-attribute-type', schema, name);
-				}
+
+			const schema = aria.get(/** @type {import('aria-query').ARIAProperty} */ (name));
+			if (schema !== undefined) {
+				validate_aria_attribute_value(
+					attribute,
+					/** @type {import('aria-query').ARIAProperty} */ (name),
+					schema,
+					value
+				);
 			}
 
 			// aria-activedescendant-has-tabindex
@@ -758,7 +771,7 @@ function check_element(node, state) {
 				!is_interactive_element(node.name, attribute_map) &&
 				!attribute_map.has('tabindex')
 			) {
-				push_warning(attribute, 'a11y-aria-activedescendant-has-tabindex');
+				w.a11y_aria_activedescendant_has_tabindex(attribute);
 			}
 		}
 
@@ -766,7 +779,7 @@ function check_element(node, state) {
 		if (name === 'role') {
 			if (invisible_elements.includes(node.name)) {
 				// aria-unsupported-elements
-				push_warning(attribute, 'a11y-misplaced-role', node.name);
+				w.a11y_misplaced_role(attribute, node.name);
 			}
 
 			const value = get_static_value(attribute);
@@ -776,10 +789,14 @@ function check_element(node, state) {
 						/** @type {import('aria-query').ARIARoleDefinitionKey} current_role */ (c_r);
 
 					if (current_role && is_abstract_role(current_role)) {
-						push_warning(attribute, 'a11y-no-abstract-role', current_role);
+						w.a11y_no_abstract_role(attribute, current_role);
 					} else if (current_role && !aria_roles.includes(current_role)) {
 						const match = fuzzymatch(current_role, aria_roles);
-						push_warning(attribute, 'a11y-unknown-role', current_role, match);
+						if (match) {
+							w.a11y_unknown_role_suggestion(attribute, current_role, match);
+						} else {
+							w.a11y_unknown_role(attribute, current_role);
+						}
 					}
 
 					// no-redundant-roles
@@ -788,7 +805,7 @@ function check_element(node, state) {
 						// <ul role="list"> is ok because CSS list-style:none removes the semantics and this is a way to bring them back
 						!['ul', 'ol', 'li'].includes(node.name)
 					) {
-						push_warning(attribute, 'a11y-no-redundant-roles', current_role);
+						w.a11y_no_redundant_roles(attribute, current_role);
 					}
 
 					// Footers and headers are special cases, and should not have redundant roles unless they are the children of sections or articles.
@@ -797,7 +814,7 @@ function check_element(node, state) {
 						const has_nested_redundant_role =
 							current_role === a11y_nested_implicit_semantics.get(node.name);
 						if (has_nested_redundant_role) {
-							push_warning(attribute, 'a11y-no-redundant-roles', current_role);
+							w.a11y_no_redundant_roles(attribute, current_role);
 						}
 					}
 
@@ -813,11 +830,13 @@ function check_element(node, state) {
 								(prop) => !attributes.find((a) => a.name === prop)
 							);
 							if (has_missing_props) {
-								push_warning(
+								w.a11y_role_has_required_aria_props(
 									attribute,
-									'a11y-role-has-required-aria-props',
 									current_role,
-									required_role_props
+									list(
+										required_role_props.map((v) => `"${v}"`),
+										'and'
+									)
 								);
 							}
 						}
@@ -836,7 +855,7 @@ function check_element(node, state) {
 							a11y_interactive_handlers.includes(handler)
 						);
 						if (has_interactive_handlers) {
-							push_warning(node, 'a11y-interactive-supports-focus', current_role);
+							w.a11y_interactive_supports_focus(node, current_role);
 						}
 					}
 
@@ -845,12 +864,7 @@ function check_element(node, state) {
 						is_interactive_element(node.name, attribute_map) &&
 						(is_non_interactive_roles(current_role) || is_presentation_role(current_role))
 					) {
-						push_warning(
-							node,
-							'a11y-no-interactive-element-to-noninteractive-role',
-							current_role,
-							node.name
-						);
+						w.a11y_no_interactive_element_to_noninteractive_role(node, node.name, current_role);
 					}
 
 					// no-noninteractive-element-to-interactive-role
@@ -861,12 +875,7 @@ function check_element(node, state) {
 							current_role
 						)
 					) {
-						push_warning(
-							node,
-							'a11y-no-noninteractive-element-to-interactive-role',
-							current_role,
-							node.name
-						);
+						w.a11y_no_noninteractive_element_to_interactive_role(node, node.name, current_role);
 					}
 				}
 			}
@@ -874,17 +883,17 @@ function check_element(node, state) {
 
 		// no-access-key
 		if (name === 'accesskey') {
-			push_warning(attribute, 'a11y-accesskey');
+			w.a11y_accesskey(attribute);
 		}
 
 		// no-autofocus
 		if (name === 'autofocus') {
-			push_warning(attribute, 'a11y-autofocus');
+			w.a11y_autofocus(attribute);
 		}
 
 		// scope
 		if (name === 'scope' && !is_dynamic_element && node.name !== 'th') {
-			push_warning(attribute, 'a11y-misplaced-scope');
+			w.a11y_misplaced_scope(attribute);
 		}
 
 		// tabindex-no-positive
@@ -892,7 +901,7 @@ function check_element(node, state) {
 			const value = get_static_value(attribute);
 			// @ts-ignore todo is tabindex=true correct case?
 			if (!isNaN(value) && +value > 0) {
-				push_warning(attribute, 'a11y-positive-tabindex');
+				w.a11y_positive_tabindex(attribute);
 			}
 		}
 	}
@@ -916,7 +925,7 @@ function check_element(node, state) {
 			const has_key_event =
 				handlers.has('keydown') || handlers.has('keyup') || handlers.has('keypress');
 			if (!has_key_event) {
-				push_warning(node, 'a11y-click-events-have-key-events');
+				w.a11y_click_events_have_key_events(node);
 			}
 		}
 	}
@@ -934,7 +943,7 @@ function check_element(node, state) {
 		const tab_index = attribute_map.get('tabindex');
 		const tab_index_value = get_static_text_value(tab_index);
 		if (tab_index && (tab_index_value === null || Number(tab_index_value) >= 0)) {
-			push_warning(node, 'a11y-no-noninteractive-tabindex');
+			w.a11y_no_noninteractive_tabindex(node);
 		}
 	}
 
@@ -949,14 +958,11 @@ function check_element(node, state) {
 			if (
 				invalid_aria_props.includes(/** @type {import('aria-query').ARIAProperty} */ (attr.name))
 			) {
-				push_warning(
-					attr,
-					'a11y-role-supports-aria-props',
-					attr.name,
-					role_value,
-					is_implicit,
-					node.name
-				);
+				if (is_implicit) {
+					w.a11y_role_supports_aria_props_implicit(attr, attr.name, role_value, node.name);
+				} else {
+					w.a11y_role_supports_aria_props(attr, attr.name, role_value);
+				}
 			}
 		}
 	}
@@ -974,7 +980,7 @@ function check_element(node, state) {
 			a11y_recommended_interactive_handlers.includes(handler)
 		);
 		if (has_interactive_handlers) {
-			push_warning(node, 'a11y-no-noninteractive-element-interactions', node.name);
+			w.a11y_no_noninteractive_element_interactions(node, node.name);
 		}
 	}
 
@@ -993,16 +999,16 @@ function check_element(node, state) {
 			a11y_interactive_handlers.includes(handler)
 		);
 		if (interactive_handlers.length > 0) {
-			push_warning(node, 'a11y-no-static-element-interactions', node.name, interactive_handlers);
+			w.a11y_no_static_element_interactions(node, node.name, list(interactive_handlers));
 		}
 	}
 
 	if (handlers.has('mouseover') && !handlers.has('focus')) {
-		push_warning(node, 'a11y-mouse-events-have-key-events', 'mouseover', 'focus');
+		w.a11y_mouse_events_have_key_events(node, 'mouseover', 'focus');
 	}
 
 	if (handlers.has('mouseout') && !handlers.has('blur')) {
-		push_warning(node, 'a11y-mouse-events-have-key-events', 'mouseout', 'blur');
+		w.a11y_mouse_events_have_key_events(node, 'mouseout', 'blur');
 	}
 
 	// element-specific checks
@@ -1021,14 +1027,14 @@ function check_element(node, state) {
 			const href_value = get_static_text_value(href);
 			if (href_value !== null) {
 				if (href_value === '' || href_value === '#' || /^\W*javascript:/i.test(href_value)) {
-					push_warning(href, 'a11y-invalid-attribute', href.name, href_value);
+					w.a11y_invalid_attribute(href, href_value, href.name);
 				}
 			}
 		} else if (!has_spread) {
 			const id_attribute = get_static_value(attribute_map.get('id'));
 			const name_attribute = get_static_value(attribute_map.get('name'));
 			if (!id_attribute && !name_attribute) {
-				push_warning(...warn_missing_attribute(node, ['href']));
+				warn_missing_attribute(node, ['href']);
 			}
 		}
 	} else if (!has_spread) {
@@ -1036,7 +1042,7 @@ function check_element(node, state) {
 		if (required_attributes) {
 			const has_attribute = required_attributes.some((name) => attribute_map.has(name));
 			if (!has_attribute) {
-				push_warning(...warn_missing_attribute(node, required_attributes));
+				warn_missing_attribute(node, required_attributes);
 			}
 		}
 	}
@@ -1048,7 +1054,7 @@ function check_element(node, state) {
 			const required_attributes = ['alt', 'aria-label', 'aria-labelledby'];
 			const has_attribute = required_attributes.some((name) => attribute_map.has(name));
 			if (!has_attribute) {
-				push_warning(...warn_missing_attribute(node, required_attributes, 'input type="image"'));
+				warn_missing_attribute(node, required_attributes, 'input type="image"');
 			}
 		}
 		// autocomplete-valid
@@ -1056,7 +1062,11 @@ function check_element(node, state) {
 		if (type && autocomplete) {
 			const autocomplete_value = get_static_value(autocomplete);
 			if (!is_valid_autocomplete(autocomplete_value)) {
-				push_warning(autocomplete, 'a11y-autocomplete-valid', type_value, autocomplete_value);
+				w.a11y_autocomplete_valid(
+					autocomplete,
+					/** @type {string} */ (autocomplete_value),
+					type_value ?? '...'
+				);
 			}
 		}
 	}
@@ -1066,7 +1076,7 @@ function check_element(node, state) {
 		const aria_hidden = get_static_value(attribute_map.get('aria-hidden'));
 		if (alt_attribute && !aria_hidden) {
 			if (/\b(image|picture|photo)\b/i.test(alt_attribute)) {
-				push_warning(node, 'a11y-img-redundant-alt');
+				w.a11y_img_redundant_alt(node);
 			}
 		}
 	}
@@ -1096,7 +1106,7 @@ function check_element(node, state) {
 			return has;
 		};
 		if (!attribute_map.has('for') && !has_input_child(node)) {
-			push_warning(node, 'a11y-label-has-associated-control');
+			w.a11y_label_has_associated_control(node);
 		}
 	}
 
@@ -1118,13 +1128,13 @@ function check_element(node, state) {
 			);
 		}
 		if (!has_caption) {
-			push_warning(node, 'a11y-media-has-caption');
+			w.a11y_media_has_caption(node);
 		}
 	}
 
 	if (node.name === 'figcaption') {
 		if (!is_parent(node.parent, ['figure'])) {
-			push_warning(node, 'a11y-structure', true);
+			w.a11y_figcaption_parent(node);
 		}
 	}
 
@@ -1138,13 +1148,13 @@ function check_element(node, state) {
 			(child) => child.type === 'RegularElement' && child.name === 'figcaption'
 		);
 		if (index !== -1 && index !== 0 && index !== children.length - 1) {
-			push_warning(children[index], 'a11y-structure', false);
+			w.a11y_figcaption_index(children[index]);
 		}
 	}
 
 	if (a11y_distracting_elements.includes(node.name)) {
 		// no-distracting-elements
-		push_warning(node, 'a11y-distracting-elements', node.name);
+		w.a11y_distracting_elements(node, node.name);
 	}
 
 	// Check content
@@ -1154,7 +1164,7 @@ function check_element(node, state) {
 		a11y_required_content.includes(node.name) &&
 		node.fragment.nodes.length === 0
 	) {
-		push_warning(node, 'a11y-missing-content', node.name);
+		w.a11y_missing_content(node, node.name);
 	}
 }
 
diff --git a/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js b/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
index e2d137198b..72f54aec24 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/css/css-warn.js
@@ -1,16 +1,15 @@
 import { walk } from 'zimmerframe';
-import { warn } from '../../../warnings.js';
+import * as w from '../../../warnings.js';
 import { is_keyframes_node } from '../../css.js';
 
 /**
  * @param {import('#compiler').Css.StyleSheet} stylesheet
- * @param {import('../../types.js').RawWarning[]} warnings
  */
-export function warn_unused(stylesheet, warnings) {
-	walk(stylesheet, { warnings, stylesheet }, visitors);
+export function warn_unused(stylesheet) {
+	walk(stylesheet, { stylesheet }, visitors);
 }
 
-/** @type {import('zimmerframe').Visitors<import('#compiler').Css.Node, { warnings: import('../../types.js').RawWarning[], stylesheet: import('#compiler').Css.StyleSheet }>} */
+/** @type {import('zimmerframe').Visitors<import('#compiler').Css.Node, { stylesheet: import('#compiler').Css.StyleSheet }>} */
 const visitors = {
 	Atrule(node, context) {
 		if (!is_keyframes_node(node)) {
@@ -26,7 +25,7 @@ const visitors = {
 		if (!node.metadata.used) {
 			const content = context.state.stylesheet.content;
 			const text = content.styles.substring(node.start - content.start, node.end - content.start);
-			warn(context.state.warnings, node, 'css-unused-selector', text);
+			w.css_unused_selector(node, text);
 		}
 
 		context.next();
diff --git a/packages/svelte/src/compiler/phases/2-analyze/index.js b/packages/svelte/src/compiler/phases/2-analyze/index.js
index d2a331e253..848ea4ebfa 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/index.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/index.js
@@ -1,6 +1,7 @@
 import is_reference from 'is-reference';
 import { walk } from 'zimmerframe';
 import * as e from '../../errors.js';
+import * as w from '../../warnings.js';
 import {
 	extract_identifiers,
 	extract_all_identifiers_from_expression,
@@ -14,7 +15,6 @@ import { ReservedKeywords, Runes, SVGElements } from '../constants.js';
 import { Scope, ScopeRoot, create_scopes, get_rune, set_scope } from '../scope.js';
 import { merge } from '../visitors.js';
 import { validation_legacy, validation_runes, validation_runes_js } from './validation.js';
-import { warn } from '../../warnings.js';
 import check_graph_for_cycles from './utils/check_graph_for_cycles.js';
 import { regex_starts_with_newline } from '../patterns.js';
 import { create_attribute, is_element_node } from '../nodes.js';
@@ -234,16 +234,9 @@ export function analyze_module(ast, options) {
 		}
 	}
 
-	/** @type {import('../types').RawWarning[]} */
-	const warnings = [];
-
-	const analysis = {
-		warnings
-	};
-
 	walk(
 		/** @type {import('estree').Node} */ (ast),
-		{ scope, analysis },
+		{ scope },
 		// @ts-expect-error TODO clean this mess up
 		merge(set_scope(scopes), validation_runes_js, runes_scope_js_tweaker)
 	);
@@ -251,7 +244,6 @@ export function analyze_module(ast, options) {
 	return {
 		module: { ast, scope, scopes },
 		name: options.filename || 'module',
-		warnings,
 		accessors: false,
 		runes: true,
 		immutable: true
@@ -275,9 +267,6 @@ export function analyze_component(root, source, options) {
 	/** @type {import('../types.js').Template} */
 	const template = { ast: root.fragment, scope, scopes };
 
-	/** @type {import('../types').RawWarning[]} */
-	const warnings = [];
-
 	// create synthetic bindings for store subscriptions
 	for (const [name, references] of module.scope.references) {
 		if (name[0] !== '$' || ReservedKeywords.includes(name)) continue;
@@ -331,7 +320,7 @@ export function analyze_component(root, source, options) {
 				} else if (declaration !== null && Runes.includes(/** @type {any} */ (name))) {
 					for (const { node, path } of references) {
 						if (path.at(-1)?.type === 'CallExpression') {
-							warn(warnings, node, 'store-with-rune-name', store_name);
+							w.store_with_rune_name(node, store_name);
 						}
 					}
 				}
@@ -391,7 +380,6 @@ export function analyze_component(root, source, options) {
 		reactive_statements: new Map(),
 		binding_groups: new Map(),
 		slot_names: new Map(),
-		warnings,
 		css: {
 			ast: root.css,
 			hash: root.css
@@ -408,7 +396,7 @@ export function analyze_component(root, source, options) {
 	};
 
 	if (!options.customElement && root.options?.customElement) {
-		warn(analysis.warnings, root.options, 'missing-custom-element-compile-option');
+		w.missing_custom_element_compile_option(root.options);
 	}
 
 	if (analysis.runes) {
@@ -498,7 +486,7 @@ export function analyze_component(root, source, options) {
 					(r) => r.node !== binding.node && r.path.at(-1)?.type !== 'ExportSpecifier'
 				);
 				if (!references.length && !instance.scope.declarations.has(`$${name}`)) {
-					warn(warnings, binding.node, 'unused-export-let', name);
+					w.unused_export_let(binding.node, name);
 				}
 			}
 		}
@@ -538,7 +526,7 @@ export function analyze_component(root, source, options) {
 									type === 'AwaitBlock' ||
 									type === 'KeyBlock'
 								) {
-									warn(warnings, binding.node, 'non-state-reference', name);
+									w.non_state_reference(binding.node, name);
 									continue outer;
 								}
 							}
@@ -546,7 +534,7 @@ export function analyze_component(root, source, options) {
 						}
 					}
 
-					warn(warnings, binding.node, 'non-state-reference', name);
+					w.non_state_reference(binding.node, name);
 					continue outer;
 				}
 			}
@@ -563,9 +551,9 @@ export function analyze_component(root, source, options) {
 
 		if (
 			!analysis.css.ast.content.comment ||
-			!extract_svelte_ignore(analysis.css.ast.content.comment.data).includes('css-unused-selector')
+			!extract_svelte_ignore(analysis.css.ast.content.comment.data).includes('css_unused_selector')
 		) {
-			warn_unused(analysis.css.ast, analysis.warnings);
+			warn_unused(analysis.css.ast);
 		}
 
 		outer: for (const element of analysis.elements) {
@@ -688,7 +676,7 @@ const legacy_scope_tweaker = {
 				(d) => d.scope === state.analysis.module.scope && d.declaration_kind !== 'const'
 			)
 		) {
-			warn(state.analysis.warnings, node, 'module-script-reactive-declaration');
+			w.module_script_reactive_declaration(node);
 		}
 
 		if (
@@ -874,7 +862,7 @@ const legacy_scope_tweaker = {
 	}
 };
 
-/** @type {import('zimmerframe').Visitors<import('#compiler').SvelteNode, { scope: Scope, analysis: { warnings: import('../types').RawWarning[] } }>} */
+/** @type {import('zimmerframe').Visitors<import('#compiler').SvelteNode, { scope: Scope }>} */
 const runes_scope_js_tweaker = {
 	VariableDeclarator(node, { state }) {
 		if (node.init?.type !== 'CallExpression') return;
@@ -1210,7 +1198,7 @@ const common_visitors = {
 					binding.kind === 'derived') &&
 				context.state.function_depth === binding.scope.function_depth
 			) {
-				warn(context.state.analysis.warnings, node, 'static-state-reference');
+				w.static_state_reference(node);
 			}
 		}
 	},
diff --git a/packages/svelte/src/compiler/phases/2-analyze/validation.js b/packages/svelte/src/compiler/phases/2-analyze/validation.js
index f4321b0101..55ae8c64d2 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/validation.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/validation.js
@@ -12,7 +12,7 @@ import {
 	object,
 	unwrap_optional
 } from '../../utils/ast.js';
-import { warn } from '../../warnings.js';
+import * as w from '../../warnings.js';
 import fuzzymatch from '../1-parse/utils/fuzzymatch.js';
 import { binding_properties } from '../bindings.js';
 import {
@@ -67,7 +67,7 @@ function validate_component(node, context) {
 				}
 			}
 
-			validate_attribute_name(attribute, context);
+			validate_attribute_name(attribute);
 
 			if (attribute.name === 'slot') {
 				validate_slot_attribute(context, attribute);
@@ -131,12 +131,7 @@ function validate_element(node, context) {
 					value.name === attribute.name &&
 					!context.state.scope.get(value.name)
 				) {
-					warn(
-						context.state.analysis.warnings,
-						attribute,
-						'global-event-reference',
-						attribute.name
-					);
+					w.global_event_reference(attribute, attribute.name);
 				}
 			}
 
@@ -146,21 +141,15 @@ function validate_element(node, context) {
 			}
 
 			if (attribute.name === 'is' && context.state.options.namespace !== 'foreign') {
-				warn(context.state.analysis.warnings, attribute, 'avoid-is');
+				w.avoid_is(attribute);
 			}
 
 			const correct_name = react_attributes.get(attribute.name);
 			if (correct_name) {
-				warn(
-					context.state.analysis.warnings,
-					attribute,
-					'invalid-html-attribute',
-					attribute.name,
-					correct_name
-				);
+				w.invalid_html_attribute(attribute, attribute.name, correct_name);
 			}
 
-			validate_attribute_name(attribute, context);
+			validate_attribute_name(attribute);
 		} else if (attribute.type === 'AnimateDirective') {
 			const parent = context.path.at(-2);
 			if (parent?.type !== 'EachBlock') {
@@ -224,16 +213,15 @@ function validate_element(node, context) {
 
 /**
  * @param {import('#compiler').Attribute} attribute
- * @param {import('zimmerframe').Context<import('#compiler').SvelteNode, import('./types.js').AnalysisState>} context
  */
-function validate_attribute_name(attribute, context) {
+function validate_attribute_name(attribute) {
 	if (
 		attribute.name.includes(':') &&
 		!attribute.name.startsWith('xmlns:') &&
 		!attribute.name.startsWith('xlink:') &&
 		!attribute.name.startsWith('xml:')
 	) {
-		warn(context.state.analysis.warnings, attribute, 'illegal-attribute-character');
+		w.illegal_attribute_character(attribute);
 	}
 }
 
@@ -311,7 +299,7 @@ function validate_block_not_empty(node, context) {
 	// Assumption: If the block has zero elements, someone's in the middle of typing it out,
 	// so don't warn in that case because it would be distracting.
 	if (node.nodes.length === 1 && node.nodes[0].type === 'Text' && !node.nodes[0].raw.trim()) {
-		warn(context.state.analysis.warnings, node.nodes[0], 'empty-block');
+		w.empty_block(node.nodes[0]);
 	}
 }
 
@@ -372,12 +360,7 @@ const validation = {
 		}
 
 		if (binding?.kind === 'each' && binding.metadata?.inside_rest) {
-			warn(
-				context.state.analysis.warnings,
-				binding.node,
-				'invalid-rest-eachblock-binding',
-				binding.node.name
-			);
+			w.invalid_rest_eachblock_binding(binding.node, binding.node.name);
 		}
 
 		const parent = context.path.at(-1);
@@ -531,7 +514,7 @@ const validation = {
 			binding.declaration_kind === 'import' &&
 			binding.references.length === 0
 		) {
-			warn(context.state.analysis.warnings, node, 'component-name-lowercase', node.name);
+			w.component_name_lowercase(node, node.name);
 		}
 
 		validate_element(node, context);
@@ -570,7 +553,7 @@ const validation = {
 			!VoidElements.includes(node.name) &&
 			!SVGElements.includes(node.name)
 		) {
-			warn(context.state.analysis.warnings, node, 'invalid-self-closing-tag', node.name);
+			w.invalid_self_closing_tag(node, node.name);
 		}
 
 		context.next({
@@ -766,7 +749,7 @@ export const validation_legacy = merge(validation, a11y_validators, {
 			(state.ast_type !== 'instance' ||
 				/** @type {import('#compiler').SvelteNode} */ (path.at(-1)).type !== 'Program')
 		) {
-			warn(state.analysis.warnings, node, 'no-reactive-declaration');
+			w.no_reactive_declaration(node);
 		}
 	},
 	UpdateExpression(node, { state }) {
@@ -969,12 +952,12 @@ export const validation_runes_js = {
 		const allowed_depth = context.state.ast_type === 'module' ? 0 : 1;
 
 		if (context.state.scope.function_depth > allowed_depth) {
-			warn(context.state.analysis.warnings, node, 'avoid-nested-class');
+			w.avoid_nested_class(node);
 		}
 	},
 	NewExpression(node, context) {
 		if (node.callee.type === 'ClassExpression' && context.state.scope.function_depth > 0) {
-			warn(context.state.analysis.warnings, node, 'avoid-inline-class');
+			w.avoid_inline_class(node);
 		}
 	}
 };
@@ -1127,7 +1110,7 @@ export const validation_runes = merge(validation, a11y_validators, {
 
 		if (rune === null) {
 			if (init?.type === 'Identifier' && init.name === '$props' && !state.scope.get('props')) {
-				warn(state.analysis.warnings, node, 'invalid-props-declaration');
+				w.invalid_props_declaration(node);
 			}
 			return;
 		}
@@ -1180,7 +1163,7 @@ export const validation_runes = merge(validation, a11y_validators, {
 				arg.type === 'CallExpression' &&
 				(arg.callee.type === 'ArrowFunctionExpression' || arg.callee.type === 'FunctionExpression')
 			) {
-				warn(state.analysis.warnings, node, 'derived-iife');
+				w.derived_iife(node);
 			}
 		}
 	},
@@ -1190,19 +1173,19 @@ export const validation_runes = merge(validation, a11y_validators, {
 			node.right.name === '$bindable' &&
 			!state.scope.get('bindable')
 		) {
-			warn(state.analysis.warnings, node, 'invalid-bindable-declaration');
+			w.invalid_bindable_declaration(node);
 		}
 	},
 	SlotElement(node, { state }) {
 		if (!state.analysis.custom_element) {
-			warn(state.analysis.warnings, node, 'deprecated-slot-element');
+			w.deprecated_slot_element(node);
 		}
 	},
-	OnDirective(node, { state, path }) {
+	OnDirective(node, { path }) {
 		const parent_type = path.at(-1)?.type;
 		// Don't warn on component events; these might not be under the author's control so the warning would be unactionable
 		if (parent_type === 'RegularElement' || parent_type === 'SvelteElement') {
-			warn(state.analysis.warnings, node, 'deprecated-event-handler', node.name);
+			w.deprecated_event_handler(node, node.name);
 		}
 	},
 	// TODO this is a code smell. need to refactor this stuff
diff --git a/packages/svelte/src/compiler/phases/3-transform/index.js b/packages/svelte/src/compiler/phases/3-transform/index.js
index 2334b3318d..2c4adb3dc8 100644
--- a/packages/svelte/src/compiler/phases/3-transform/index.js
+++ b/packages/svelte/src/compiler/phases/3-transform/index.js
@@ -17,7 +17,7 @@ export function transform_component(analysis, source, options) {
 		return {
 			js: /** @type {any} */ (null),
 			css: null,
-			warnings: transform_warnings(source, options.filename, analysis.warnings),
+			warnings: /** @type {any} */ (null), // set afterwards
 			metadata: {
 				runes: analysis.runes
 			},
@@ -60,7 +60,7 @@ export function transform_component(analysis, source, options) {
 	return {
 		js,
 		css,
-		warnings: transform_warnings(source, options.filename, analysis.warnings), // TODO apply preprocessor sourcemap
+		warnings: /** @type {any} */ (null), // set afterwards. TODO apply preprocessor sourcemap
 		metadata: {
 			runes: analysis.runes
 		},
@@ -79,7 +79,7 @@ export function transform_module(analysis, source, options) {
 		return {
 			js: /** @type {any} */ (null),
 			css: null,
-			warnings: transform_warnings(source, analysis.name, analysis.warnings),
+			warnings: /** @type {any} */ (null), // set afterwards
 			metadata: {
 				runes: true
 			},
@@ -105,45 +105,10 @@ export function transform_module(analysis, source, options) {
 	return {
 		js: print(program, {}),
 		css: null,
-		warnings: transform_warnings(source, analysis.name, analysis.warnings),
 		metadata: {
 			runes: true
 		},
+		warnings: /** @type {any} */ (null), // set afterwards
 		ast: /** @type {any} */ (null) // set afterwards
 	};
 }
-
-/**
- * @param {string} source
- * @param {string | undefined} name
- * @param {import('../types').RawWarning[]} warnings
- * @returns {import('#compiler').Warning[]}
- */
-function transform_warnings(source, name, warnings) {
-	if (warnings.length === 0) return [];
-
-	const locate = getLocator(source, { offsetLine: 1 });
-
-	/** @type {import('#compiler').Warning[]} */
-	const result = [];
-
-	for (const warning of warnings) {
-		const start =
-			warning.position &&
-			/** @type {import('locate-character').Location} */ (locate(warning.position[0]));
-
-		const end =
-			warning.position &&
-			/** @type {import('locate-character').Location} */ (locate(warning.position[1]));
-
-		result.push({
-			start,
-			end,
-			filename: name,
-			message: warning.message,
-			code: warning.code
-		});
-	}
-
-	return result;
-}
diff --git a/packages/svelte/src/compiler/phases/types.d.ts b/packages/svelte/src/compiler/phases/types.d.ts
index 91fd68ca39..c2ece7d7fd 100644
--- a/packages/svelte/src/compiler/phases/types.d.ts
+++ b/packages/svelte/src/compiler/phases/types.d.ts
@@ -6,7 +6,8 @@ import type {
 	SlotElement,
 	SvelteElement,
 	SvelteNode,
-	SvelteOptions
+	SvelteOptions,
+	Warning
 } from '#compiler';
 import type { Identifier, LabeledStatement, Program } from 'estree';
 import type { Scope, ScopeRoot } from './scope.js';
@@ -28,19 +29,12 @@ export interface ReactiveStatement {
 	dependencies: Binding[];
 }
 
-export interface RawWarning {
-	code: string;
-	message: string;
-	position: [number, number] | undefined;
-}
-
 /**
  * Analysis common to modules and components
  */
 export interface Analysis {
 	module: Js;
 	name: string; // TODO should this be filename? it's used in `compileModule` as well as `compile`
-	warnings: RawWarning[];
 	runes: boolean;
 	immutable: boolean;
 
diff --git a/packages/svelte/src/compiler/utils/string.js b/packages/svelte/src/compiler/utils/string.js
new file mode 100644
index 0000000000..42eefa993b
--- /dev/null
+++ b/packages/svelte/src/compiler/utils/string.js
@@ -0,0 +1,9 @@
+/**
+ * @param {string[]} strings
+ * @param {string} conjunction
+ */
+export function list(strings, conjunction = 'or') {
+	if (strings.length === 1) return strings[0];
+	if (strings.length === 2) return `${strings[0]} ${conjunction} ${strings[1]}`;
+	return `${strings.slice(0, -1).join(', ')} ${conjunction} ${strings[strings.length - 1]}`;
+}
diff --git a/packages/svelte/src/compiler/warnings.js b/packages/svelte/src/compiler/warnings.js
index 3983d3686e..1e71aa51a6 100644
--- a/packages/svelte/src/compiler/warnings.js
+++ b/packages/svelte/src/compiler/warnings.js
@@ -1,294 +1,628 @@
-/** @typedef {Record<string, (...args: any[]) => string>} Warnings */
-
-/** @satisfies {Warnings} */
-const css = {
-	/** @param {string} name */
-	'css-unused-selector': (name) => `Unused CSS selector "${name}"`
-};
-
-/** @satisfies {Warnings} */
-const attributes = {
-	'avoid-is': () => 'The "is" attribute is not supported cross-browser and should be avoided',
-	/** @param {string} name */
-	'global-event-reference': (name) =>
-		`You are referencing globalThis.${name}. Did you forget to declare a variable with that name?`,
-	'illegal-attribute-character': () =>
-		"Attributes should not contain ':' characters to prevent ambiguity with Svelte directives",
-	/**
-	 * @param {string} wrong
-	 * @param {string} right
-	 */
-	'invalid-html-attribute': (wrong, right) =>
-		`'${wrong}' is not a valid HTML attribute. Did you mean '${right}'?`
-};
-
-/** @satisfies {Warnings} */
-const runes = {
-	/** @param {string} name */
-	'store-with-rune-name': (name) =>
-		`It looks like you're using the $${name} rune, but there is a local binding called ${name}. ` +
-		`Referencing a local variable with a $ prefix will create a store subscription. Please rename ${name} to avoid the ambiguity.`,
-	/** @param {string} name */
-	'non-state-reference': (name) =>
-		`${name} is updated, but is not declared with $state(...). Changing its value will not correctly trigger updates.`,
-	'derived-iife': () =>
-		`Use \`$derived.by(() => {...})\` instead of \`$derived((() => {...})());\``,
-	'invalid-props-declaration': () =>
-		`Component properties are declared using $props() in runes mode. Did you forget to call the function?`,
-	'invalid-bindable-declaration': () =>
-		`Bindable component properties are declared using $bindable() in runes mode. Did you forget to call the function?`
-};
-
-/** @satisfies {Warnings} */
-const a11y = {
-	/** @param {string} name */
-	'a11y-aria-attributes': (name) => `A11y: <${name}> should not have aria-* attributes`,
-	/**
-	 * @param {string} attribute
-	 * @param {string | null} [suggestion]
-	 */
-	'a11y-unknown-aria-attribute': (attribute, suggestion) =>
-		`A11y: Unknown aria attribute 'aria-${attribute}'` +
-		(suggestion ? ` (did you mean '${suggestion}'?)` : ''),
-	/** @param {string} name */
-	'a11y-hidden': (name) => `A11y: <${name}> element should not be hidden`,
-	/**
-	 * @param {import('aria-query').ARIAPropertyDefinition} schema
-	 * @param {string} attribute
-	 */
-	'a11y-incorrect-aria-attribute-type': (schema, attribute) => {
-		let message;
-		switch (schema.type) {
-			case 'boolean':
-				message = `The value of '${attribute}' must be exactly one of true or false`;
-				break;
-			case 'id':
-				message = `The value of '${attribute}' must be a string that represents a DOM element ID`;
-				break;
-			case 'idlist':
-				message = `The value of '${attribute}' must be a space-separated list of strings that represent DOM element IDs`;
-				break;
-			case 'tristate':
-				message = `The value of '${attribute}' must be exactly one of true, false, or mixed`;
-				break;
-			case 'token':
-				message = `The value of '${attribute}' must be exactly one of ${(schema.values || []).join(
-					', '
-				)}`;
-				break;
-			case 'tokenlist':
-				message = `The value of '${attribute}' must be a space-separated list of one or more of ${(
-					schema.values || []
-				).join(', ')}`;
-				break;
-			default:
-				message = `The value of '${attribute}' must be of type ${schema.type}`;
-		}
-		return `A11y: ${message}`;
-	},
-	'a11y-aria-activedescendant-has-tabindex': () =>
-		'A11y: Elements with attribute aria-activedescendant should have tabindex value',
-	/** @param {string} name */
-	'a11y-misplaced-role': (name) => `A11y: <${name}> should not have role attribute`,
-	/** @param {string | boolean} role */
-	'a11y-no-abstract-role': (role) => `A11y: Abstract role '${role}' is forbidden`,
-	/**
-	 * @param {string | boolean} role
-	 * @param {string | null} [suggestion]
-	 */
-	'a11y-unknown-role': (role, suggestion) =>
-		`A11y: Unknown role '${role}'` + (suggestion ? ` (did you mean '${suggestion}'?)` : ''),
-	/** @param {string | boolean} role */
-	'a11y-no-redundant-roles': (role) => `A11y: Redundant role '${role}'`,
-	/**
-	 * @param {string} role
-	 * @param {string[]} props
-	 */
-	'a11y-role-has-required-aria-props': (role, props) =>
-		`A11y: Elements with the ARIA role "${role}" must have the following attributes defined: ${props
-			.map((name) => `"${name}"`)
-			.join(', ')}`,
-	/** @param {string} role */
-	'a11y-interactive-supports-focus': (role) =>
-		`A11y: Elements with the '${role}' interactive role must have a tabindex value.`,
-	/**
-	 * @param {string | boolean} role
-	 * @param {string} element
-	 */
-	'a11y-no-interactive-element-to-noninteractive-role': (role, element) =>
-		`A11y: <${element}> cannot have role '${role}'`,
-	/**
-	 * @param {string | boolean} role
-	 * @param {string} element
-	 */
-	'a11y-no-noninteractive-element-to-interactive-role': (role, element) =>
-		`A11y: Non-interactive element <${element}> cannot have interactive role '${role}'`,
-	'a11y-accesskey': () => 'A11y: Avoid using accesskey',
-	'a11y-autofocus': () => 'A11y: Avoid using autofocus',
-	'a11y-misplaced-scope': () => 'A11y: The scope attribute should only be used with <th> elements',
-	'a11y-positive-tabindex': () => 'A11y: avoid tabindex values above zero',
-	'a11y-click-events-have-key-events': () =>
-		'A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type="button"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.',
-	'a11y-no-noninteractive-tabindex': () =>
-		'A11y: noninteractive element cannot have nonnegative tabIndex value',
-	/**
-	 * @param {string} attribute
-	 * @param {string} role
-	 * @param {boolean} is_implicit
-	 * @param {string} name
-	 */
-	'a11y-role-supports-aria-props': (attribute, role, is_implicit, name) => {
-		let message = `The attribute '${attribute}' is not supported by the role '${role}'.`;
-		if (is_implicit) {
-			message += ` This role is implicit on the element <${name}>.`;
-		}
-		return `A11y: ${message}`;
-	},
-	/** @param {string} element */
-	'a11y-no-noninteractive-element-interactions': (element) =>
-		`A11y: Non-interactive element <${element}> should not be assigned mouse or keyboard event listeners.`,
-	/**
-	 * @param {string} element
-	 * @param {string[]} handlers
-	 */
-	'a11y-no-static-element-interactions': (element, handlers) =>
-		`A11y: <${element}> with ${handlers.join(', ')} ${
-			handlers.length === 1 ? 'handler' : 'handlers'
-		} must have an ARIA role`,
-	/**
-	 * @param {string} href_attribute
-	 * @param {string} href_value
-	 */
-	'a11y-invalid-attribute': (href_attribute, href_value) =>
-		`A11y: '${href_value}' is not a valid ${href_attribute} attribute`,
-	/**
-	 * @param {string} name
-	 * @param {string} article
-	 * @param {string} sequence
-	 */
-	'a11y-missing-attribute': (name, article, sequence) =>
-		`A11y: <${name}> element should have ${article} ${sequence} attribute`,
-	/**
-	 * @param {null | true | string} type
-	 * @param {null | true | string} value
-	 */
-	'a11y-autocomplete-valid': (type, value) =>
-		`A11y: The value '${value}' is not supported by the attribute 'autocomplete' on element <input type="${
-			type || '...'
-		}">`,
-	'a11y-img-redundant-alt': () =>
-		'A11y: Screenreaders already announce <img> elements as an image.',
-	'a11y-label-has-associated-control': () =>
-		'A11y: A form label must be associated with a control.',
-	'a11y-media-has-caption': () => 'A11y: <video> elements must have a <track kind="captions">',
-	/** @param {string} name */
-	'a11y-distracting-elements': (name) => `A11y: Avoid <${name}> elements`,
-	/** @param {boolean} immediate */
-	'a11y-structure': (immediate) =>
-		immediate
-			? 'A11y: <figcaption> must be an immediate child of <figure>'
-			: 'A11y: <figcaption> must be first or last child of <figure>',
-	/**
-	 * @param {string} event
-	 * @param {string} accompanied_by
-	 */
-	'a11y-mouse-events-have-key-events': (event, accompanied_by) =>
-		`A11y: '${event}' event must be accompanied by '${accompanied_by}' event`,
-	/** @param {string} name */
-	'a11y-missing-content': (name) => `A11y: <${name}> element should have child content`
-};
-
-/** @satisfies {Warnings} */
-const state = {
-	'static-state-reference': () =>
-		`State referenced in its own scope will never update. Did you mean to reference it inside a closure?`,
-	/** @param {string} name */
-	'invalid-rest-eachblock-binding': (name) =>
-		`The rest operator (...) will create a new object and binding '${name}' with the original object will not work`
-};
-
-/** @satisfies {Warnings} */
-const performance = {
-	'avoid-inline-class': () =>
-		`Avoid 'new class' — instead, declare the class at the top level scope`,
-	'avoid-nested-class': () => `Avoid declaring classes below the top level scope`
-};
-
-/** @satisfies {Warnings} */
-const components = {
-	/** @param {string} name */
-	'component-name-lowercase': (name) =>
-		`<${name}> will be treated as an HTML element unless it begins with a capital letter`
-};
-
-const legacy = {
-	'no-reactive-declaration': () =>
-		`Reactive declarations only exist at the top level of the instance script`,
-	'module-script-reactive-declaration': () =>
-		'All dependencies of the reactive declaration are declared in a module script and will not be reactive',
-	/** @param {string} name */
-	'unused-export-let': (name) =>
-		`Component has unused export property '${name}'. If it is for external reference only, please consider using \`export const ${name}\``,
-	'deprecated-slot-element': () =>
-		`Using <slot> to render parent content is deprecated. Use {@render ...} tags instead.`,
-	/** @param {string} name */
-	'deprecated-event-handler': (name) =>
-		`Using on:${name} to listen to the ${name} event is is deprecated. Use the event attribute on${name} instead.`
-};
-
-const block = {
-	'empty-block': () => 'Empty block'
-};
-
-const options = {
-	'missing-custom-element-compile-option': () =>
-		"The 'customElement' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?"
-};
-
-const misc = {
-	/** @param {string} name */
-	'invalid-self-closing-tag': (name) =>
-		`Self-closing HTML tags for non-void elements are ambiguous — use <${name} ...></${name}> rather than <${name} ... />`
-};
-
-/** @satisfies {Warnings} */
-const warnings = {
-	...css,
-	...attributes,
-	...runes,
-	...a11y,
-	...performance,
-	...state,
-	...components,
-	...legacy,
-	...block,
-	...options,
-	...misc
-};
-
-/** @typedef {typeof warnings} AllWarnings */
-
-/**
- * @template {keyof AllWarnings} T
- * @param {import('./phases/types').RawWarning[]} array the array to push the warning to, if not ignored
- * @param {{ start?: number, end?: number, type?: string, parent?: import('#compiler').SvelteNode | null, leadingComments?: import('estree').Comment[] } | null} node the node related to the warning
- * @param {T} code the warning code
- * @param  {Parameters<AllWarnings[T]>} args the arguments to pass to the warning function
- * @returns {void}
- */
-export function warn(array, node, code, ...args) {
-	// @ts-expect-error
-	if (node.ignores?.has(code)) return;
+/* This file is generated by scripts/process-messages.js. Do not edit! */
+
+import { getLocator } from 'locate-character';
 
-	const fn = warnings[code];
+/** @typedef {{ start?: number, end?: number }} NodeLike */
+/** @type {import('#compiler').Warning[]} */
+let warnings = [];
+/** @type {string | undefined} */
+let filename;
+let locator = getLocator('', { offsetLine: 1 });
 
-	const start = node?.start;
-	const end = node?.end;
+/**
+ * @param {{
+ *   source: string;
+ *   filename: string | undefined;
+ * }} options
+ * @returns {import('#compiler').Warning[]}
+ */
+export function reset_warnings(options) {
+	filename = options.filename;
+	locator = getLocator(options.source, { offsetLine: 1 });
+	return warnings = [];
+}
+
+/**
+ * @param {null | NodeLike} node
+ * @param {string} code
+ * @param {string} message
+ */
+function w(node, code, message) {
+	// @ts-expect-error
+	if (node.ignores?.has(code)) return;
 
-	array.push({
+	warnings.push({
 		code,
-		// @ts-expect-error
-		message: fn(...args),
-		position: start !== undefined && end !== undefined ? [start, end] : undefined
+		message,
+		filename,
+		start: node?.start !== undefined ? locator(node.start) : undefined,
+		end: node?.end !== undefined ? locator(node.end) : undefined
 	});
 }
+
+/**
+ * <%name%> should not have aria-* attributes
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function a11y_aria_attributes(node, name) {
+	w(node, "a11y_aria_attributes", `<${name}> should not have aria-* attributes`);
+}
+
+/**
+ * Unknown aria attribute 'aria-%attribute%'
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ */
+export function a11y_unknown_aria_attribute(node, attribute) {
+	w(node, "a11y_unknown_aria_attribute", `Unknown aria attribute 'aria-${attribute}'`);
+}
+
+/**
+ * Unknown aria attribute 'aria-%attribute%'. Did you mean '%suggestion%'?
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ * @param {string} suggestion
+ */
+export function a11y_unknown_aria_attribute_suggestion(node, attribute, suggestion) {
+	w(node, "a11y_unknown_aria_attribute_suggestion", `Unknown aria attribute 'aria-${attribute}'. Did you mean '${suggestion}'?`);
+}
+
+/**
+ * <%name%> element should not be hidden
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function a11y_hidden(node, name) {
+	w(node, "a11y_hidden", `<${name}> element should not be hidden`);
+}
+
+/**
+ * The value of '%attribute%' must be either 'true' or 'false'
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ */
+export function a11y_incorrect_aria_attribute_type_boolean(node, attribute) {
+	w(node, "a11y_incorrect_aria_attribute_type_boolean", `The value of '${attribute}' must be either 'true' or 'false'`);
+}
+
+/**
+ * The value of '%attribute%' must be an integer
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ */
+export function a11y_incorrect_aria_attribute_type_integer(node, attribute) {
+	w(node, "a11y_incorrect_aria_attribute_type_integer", `The value of '${attribute}' must be an integer`);
+}
+
+/**
+ * The value of '%attribute%' must be a string that represents a DOM element ID
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ */
+export function a11y_incorrect_aria_attribute_type_id(node, attribute) {
+	w(node, "a11y_incorrect_aria_attribute_type_id", `The value of '${attribute}' must be a string that represents a DOM element ID`);
+}
+
+/**
+ * The value of '%attribute%' must be a space-separated list of strings that represent DOM element IDs
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ */
+export function a11y_incorrect_aria_attribute_type_idlist(node, attribute) {
+	w(node, "a11y_incorrect_aria_attribute_type_idlist", `The value of '${attribute}' must be a space-separated list of strings that represent DOM element IDs`);
+}
+
+/**
+ * The value of '%attribute%' must be exactly one of true, false, or mixed
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ */
+export function a11y_incorrect_aria_attribute_type_tristate(node, attribute) {
+	w(node, "a11y_incorrect_aria_attribute_type_tristate", `The value of '${attribute}' must be exactly one of true, false, or mixed`);
+}
+
+/**
+ * The value of '%attribute%' must be exactly one of %values%
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ * @param {string} values
+ */
+export function a11y_incorrect_aria_attribute_type_token(node, attribute, values) {
+	w(node, "a11y_incorrect_aria_attribute_type_token", `The value of '${attribute}' must be exactly one of ${values}`);
+}
+
+/**
+ * The value of '%attribute%' must be a space-separated list of one or more of %values%
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ * @param {string} values
+ */
+export function a11y_incorrect_aria_attribute_type_tokenlist(node, attribute, values) {
+	w(node, "a11y_incorrect_aria_attribute_type_tokenlist", `The value of '${attribute}' must be a space-separated list of one or more of ${values}`);
+}
+
+/**
+ * The value of '%attribute%' must be of type %type%
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ * @param {string} type
+ */
+export function a11y_incorrect_aria_attribute_type(node, attribute, type) {
+	w(node, "a11y_incorrect_aria_attribute_type", `The value of '${attribute}' must be of type ${type}`);
+}
+
+/**
+ * Elements with attribute aria-activedescendant should have tabindex value
+ * @param {null | NodeLike} node
+ */
+export function a11y_aria_activedescendant_has_tabindex(node) {
+	w(node, "a11y_aria_activedescendant_has_tabindex", "Elements with attribute aria-activedescendant should have tabindex value");
+}
+
+/**
+ * <%name%> should not have role attribute
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function a11y_misplaced_role(node, name) {
+	w(node, "a11y_misplaced_role", `<${name}> should not have role attribute`);
+}
+
+/**
+ * Abstract role '%role%' is forbidden
+ * @param {null | NodeLike} node
+ * @param {string} role
+ */
+export function a11y_no_abstract_role(node, role) {
+	w(node, "a11y_no_abstract_role", `Abstract role '${role}' is forbidden`);
+}
+
+/**
+ * Unknown role '%role%'
+ * @param {null | NodeLike} node
+ * @param {string} role
+ */
+export function a11y_unknown_role(node, role) {
+	w(node, "a11y_unknown_role", `Unknown role '${role}'`);
+}
+
+/**
+ * Unknown role '%role%'. Did you mean '%suggestion%'?
+ * @param {null | NodeLike} node
+ * @param {string} role
+ * @param {string} suggestion
+ */
+export function a11y_unknown_role_suggestion(node, role, suggestion) {
+	w(node, "a11y_unknown_role_suggestion", `Unknown role '${role}'. Did you mean '${suggestion}'?`);
+}
+
+/**
+ * Redundant role '%role%'
+ * @param {null | NodeLike} node
+ * @param {string} role
+ */
+export function a11y_no_redundant_roles(node, role) {
+	w(node, "a11y_no_redundant_roles", `Redundant role '${role}'`);
+}
+
+/**
+ * Elements with the ARIA role "%role%" must have the following attributes defined: %props%
+ * @param {null | NodeLike} node
+ * @param {string} role
+ * @param {string} props
+ */
+export function a11y_role_has_required_aria_props(node, role, props) {
+	w(node, "a11y_role_has_required_aria_props", `Elements with the ARIA role "${role}" must have the following attributes defined: ${props}`);
+}
+
+/**
+ * Elements with the '%role%' interactive role must have a tabindex value.
+ * @param {null | NodeLike} node
+ * @param {string} role
+ */
+export function a11y_interactive_supports_focus(node, role) {
+	w(node, "a11y_interactive_supports_focus", `Elements with the '${role}' interactive role must have a tabindex value.`);
+}
+
+/**
+ * <%element%> cannot have role '%role%'
+ * @param {null | NodeLike} node
+ * @param {string} element
+ * @param {string} role
+ */
+export function a11y_no_interactive_element_to_noninteractive_role(node, element, role) {
+	w(node, "a11y_no_interactive_element_to_noninteractive_role", `<${element}> cannot have role '${role}'`);
+}
+
+/**
+ * Non-interactive element <%element%> cannot have interactive role '%role%'
+ * @param {null | NodeLike} node
+ * @param {string} element
+ * @param {string} role
+ */
+export function a11y_no_noninteractive_element_to_interactive_role(node, element, role) {
+	w(node, "a11y_no_noninteractive_element_to_interactive_role", `Non-interactive element <${element}> cannot have interactive role '${role}'`);
+}
+
+/**
+ * Avoid using accesskey
+ * @param {null | NodeLike} node
+ */
+export function a11y_accesskey(node) {
+	w(node, "a11y_accesskey", "Avoid using accesskey");
+}
+
+/**
+ * Avoid using autofocus
+ * @param {null | NodeLike} node
+ */
+export function a11y_autofocus(node) {
+	w(node, "a11y_autofocus", "Avoid using autofocus");
+}
+
+/**
+ * The scope attribute should only be used with <th> elements
+ * @param {null | NodeLike} node
+ */
+export function a11y_misplaced_scope(node) {
+	w(node, "a11y_misplaced_scope", "The scope attribute should only be used with <th> elements");
+}
+
+/**
+ * Avoid tabindex values above zero
+ * @param {null | NodeLike} node
+ */
+export function a11y_positive_tabindex(node) {
+	w(node, "a11y_positive_tabindex", "Avoid tabindex values above zero");
+}
+
+/**
+ * Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type="button"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.
+ * @param {null | NodeLike} node
+ */
+export function a11y_click_events_have_key_events(node) {
+	w(node, "a11y_click_events_have_key_events", "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.");
+}
+
+/**
+ * noninteractive element cannot have nonnegative tabIndex value
+ * @param {null | NodeLike} node
+ */
+export function a11y_no_noninteractive_tabindex(node) {
+	w(node, "a11y_no_noninteractive_tabindex", "noninteractive element cannot have nonnegative tabIndex value");
+}
+
+/**
+ * The attribute '%attribute%' is not supported by the role '%role%'
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ * @param {string} role
+ */
+export function a11y_role_supports_aria_props(node, attribute, role) {
+	w(node, "a11y_role_supports_aria_props", `The attribute '${attribute}' is not supported by the role '${role}'`);
+}
+
+/**
+ * The attribute '%attribute%' is not supported by the role '%role%'. This role is implicit on the element <%name%>
+ * @param {null | NodeLike} node
+ * @param {string} attribute
+ * @param {string} role
+ * @param {string} name
+ */
+export function a11y_role_supports_aria_props_implicit(node, attribute, role, name) {
+	w(node, "a11y_role_supports_aria_props_implicit", `The attribute '${attribute}' is not supported by the role '${role}'. This role is implicit on the element <${name}>`);
+}
+
+/**
+ * Non-interactive element <%element%> should not be assigned mouse or keyboard event listeners.
+ * @param {null | NodeLike} node
+ * @param {string} element
+ */
+export function a11y_no_noninteractive_element_interactions(node, element) {
+	w(node, "a11y_no_noninteractive_element_interactions", `Non-interactive element <${element}> should not be assigned mouse or keyboard event listeners.`);
+}
+
+/**
+ * <%element%> with a %handler% handler must have an ARIA role
+ * @param {null | NodeLike} node
+ * @param {string} element
+ * @param {string} handler
+ */
+export function a11y_no_static_element_interactions(node, element, handler) {
+	w(node, "a11y_no_static_element_interactions", `<${element}> with a ${handler} handler must have an ARIA role`);
+}
+
+/**
+ * '%href_value%' is not a valid %href_attribute% attribute
+ * @param {null | NodeLike} node
+ * @param {string} href_value
+ * @param {string} href_attribute
+ */
+export function a11y_invalid_attribute(node, href_value, href_attribute) {
+	w(node, "a11y_invalid_attribute", `'${href_value}' is not a valid ${href_attribute} attribute`);
+}
+
+/**
+ * <%name%> element should have %article% %sequence% attribute
+ * @param {null | NodeLike} node
+ * @param {string} name
+ * @param {string} article
+ * @param {string} sequence
+ */
+export function a11y_missing_attribute(node, name, article, sequence) {
+	w(node, "a11y_missing_attribute", `<${name}> element should have ${article} ${sequence} attribute`);
+}
+
+/**
+ * The value '%value%' is not supported by the attribute 'autocomplete' on element <input type="%type%">
+ * @param {null | NodeLike} node
+ * @param {string} value
+ * @param {string} type
+ */
+export function a11y_autocomplete_valid(node, value, type) {
+	w(node, "a11y_autocomplete_valid", `The value '${value}' is not supported by the attribute 'autocomplete' on element <input type="${type}">`);
+}
+
+/**
+ * Screenreaders already announce <img> elements as an image.
+ * @param {null | NodeLike} node
+ */
+export function a11y_img_redundant_alt(node) {
+	w(node, "a11y_img_redundant_alt", "Screenreaders already announce <img> elements as an image.");
+}
+
+/**
+ * A form label must be associated with a control.
+ * @param {null | NodeLike} node
+ */
+export function a11y_label_has_associated_control(node) {
+	w(node, "a11y_label_has_associated_control", "A form label must be associated with a control.");
+}
+
+/**
+ * <video> elements must have a <track kind="captions">
+ * @param {null | NodeLike} node
+ */
+export function a11y_media_has_caption(node) {
+	w(node, "a11y_media_has_caption", "<video> elements must have a <track kind=\"captions\">");
+}
+
+/**
+ * Avoid <%name%> elements
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function a11y_distracting_elements(node, name) {
+	w(node, "a11y_distracting_elements", `Avoid <${name}> elements`);
+}
+
+/**
+ * `<figcaption>` must be an immediate child of `<figure>`
+ * @param {null | NodeLike} node
+ */
+export function a11y_figcaption_parent(node) {
+	w(node, "a11y_figcaption_parent", "`<figcaption>` must be an immediate child of `<figure>`");
+}
+
+/**
+ * `<figcaption>` must be first or last child of `<figure>`
+ * @param {null | NodeLike} node
+ */
+export function a11y_figcaption_index(node) {
+	w(node, "a11y_figcaption_index", "`<figcaption>` must be first or last child of `<figure>`");
+}
+
+/**
+ * '%event%' event must be accompanied by '%accompanied_by%' event
+ * @param {null | NodeLike} node
+ * @param {string} event
+ * @param {string} accompanied_by
+ */
+export function a11y_mouse_events_have_key_events(node, event, accompanied_by) {
+	w(node, "a11y_mouse_events_have_key_events", `'${event}' event must be accompanied by '${accompanied_by}' event`);
+}
+
+/**
+ * <%name%> element should have child content
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function a11y_missing_content(node, name) {
+	w(node, "a11y_missing_content", `<${name}> element should have child content`);
+}
+
+/**
+ * The "is" attribute is not supported cross-browser and should be avoided
+ * @param {null | NodeLike} node
+ */
+export function avoid_is(node) {
+	w(node, "avoid_is", "The \"is\" attribute is not supported cross-browser and should be avoided");
+}
+
+/**
+ * You are referencing globalThis.%name%. Did you forget to declare a variable with that name?
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function global_event_reference(node, name) {
+	w(node, "global_event_reference", `You are referencing globalThis.${name}. Did you forget to declare a variable with that name?`);
+}
+
+/**
+ * Attributes should not contain ':' characters to prevent ambiguity with Svelte directives
+ * @param {null | NodeLike} node
+ */
+export function illegal_attribute_character(node) {
+	w(node, "illegal_attribute_character", "Attributes should not contain ':' characters to prevent ambiguity with Svelte directives");
+}
+
+/**
+ * '%wrong%' is not a valid HTML attribute. Did you mean '%right%'?
+ * @param {null | NodeLike} node
+ * @param {string} wrong
+ * @param {string} right
+ */
+export function invalid_html_attribute(node, wrong, right) {
+	w(node, "invalid_html_attribute", `'${wrong}' is not a valid HTML attribute. Did you mean '${right}'?`);
+}
+
+/**
+ * Empty block
+ * @param {null | NodeLike} node
+ */
+export function empty_block(node) {
+	w(node, "empty_block", "Empty block");
+}
+
+/**
+ * <%name%> will be treated as an HTML element unless it begins with a capital letter
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function component_name_lowercase(node, name) {
+	w(node, "component_name_lowercase", `<${name}> will be treated as an HTML element unless it begins with a capital letter`);
+}
+
+/**
+ * Unused CSS selector "%name%"
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function css_unused_selector(node, name) {
+	w(node, "css_unused_selector", `Unused CSS selector "${name}"`);
+}
+
+/**
+ * Reactive declarations only exist at the top level of the instance script
+ * @param {null | NodeLike} node
+ */
+export function no_reactive_declaration(node) {
+	w(node, "no_reactive_declaration", "Reactive declarations only exist at the top level of the instance script");
+}
+
+/**
+ * All dependencies of the reactive declaration are declared in a module script and will not be reactive
+ * @param {null | NodeLike} node
+ */
+export function module_script_reactive_declaration(node) {
+	w(node, "module_script_reactive_declaration", "All dependencies of the reactive declaration are declared in a module script and will not be reactive");
+}
+
+/**
+ * Component has unused export property '%name%'. If it is for external reference only, please consider using `export const %name%`
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function unused_export_let(node, name) {
+	w(node, "unused_export_let", `Component has unused export property '${name}'. If it is for external reference only, please consider using \`export const ${name}\``);
+}
+
+/**
+ * Using <slot> to render parent content is deprecated. Use {@render ...} tags instead.
+ * @param {null | NodeLike} node
+ */
+export function deprecated_slot_element(node) {
+	w(node, "deprecated_slot_element", "Using <slot> to render parent content is deprecated. Use {@render ...} tags instead.");
+}
+
+/**
+ * Using on:%name% to listen to the %name% event is is deprecated. Use the event attribute on%name% instead.
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function deprecated_event_handler(node, name) {
+	w(node, "deprecated_event_handler", `Using on:${name} to listen to the ${name} event is is deprecated. Use the event attribute on${name} instead.`);
+}
+
+/**
+ * Self-closing HTML tags for non-void elements are ambiguous — use <%name% ...></%name%> rather than <%name% ... />
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function invalid_self_closing_tag(node, name) {
+	w(node, "invalid_self_closing_tag", `Self-closing HTML tags for non-void elements are ambiguous — use <${name} ...></${name}> rather than <${name} ... />`);
+}
+
+/**
+ * The 'customElement' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?
+ * @param {null | NodeLike} node
+ */
+export function missing_custom_element_compile_option(node) {
+	w(node, "missing_custom_element_compile_option", "The 'customElement' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?");
+}
+
+/**
+ * Avoid 'new class' — instead, declare the class at the top level scope
+ * @param {null | NodeLike} node
+ */
+export function avoid_inline_class(node) {
+	w(node, "avoid_inline_class", "Avoid 'new class' — instead, declare the class at the top level scope");
+}
+
+/**
+ * Avoid declaring classes below the top level scope
+ * @param {null | NodeLike} node
+ */
+export function avoid_nested_class(node) {
+	w(node, "avoid_nested_class", "Avoid declaring classes below the top level scope");
+}
+
+/**
+ * It looks like you're using the `$%name%` rune, but there is a local binding called `%name%`. Referencing a local variable with a `$` prefix will create a store subscription. Please rename `%name%` to avoid the ambiguity
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function store_with_rune_name(node, name) {
+	w(node, "store_with_rune_name", `It looks like you're using the \`$${name}\` rune, but there is a local binding called \`${name}\`. Referencing a local variable with a \`$\` prefix will create a store subscription. Please rename \`${name}\` to avoid the ambiguity`);
+}
+
+/**
+ * `%name%` is updated, but is not declared with `$state(...)`. Changing its value will not correctly trigger updates
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function non_state_reference(node, name) {
+	w(node, "non_state_reference", `\`${name}\` is updated, but is not declared with \`$state(...)\`. Changing its value will not correctly trigger updates`);
+}
+
+/**
+ * Use `$derived.by(() => {...})` instead of `$derived((() => {...})())`
+ * @param {null | NodeLike} node
+ */
+export function derived_iife(node) {
+	w(node, "derived_iife", "Use `$derived.by(() => {...})` instead of `$derived((() => {...})())`");
+}
+
+/**
+ * Component properties are declared using `$props()` in runes mode. Did you forget to call the function?
+ * @param {null | NodeLike} node
+ */
+export function invalid_props_declaration(node) {
+	w(node, "invalid_props_declaration", "Component properties are declared using `$props()` in runes mode. Did you forget to call the function?");
+}
+
+/**
+ * Bindable component properties are declared using `$bindable()` in runes mode. Did you forget to call the function?
+ * @param {null | NodeLike} node
+ */
+export function invalid_bindable_declaration(node) {
+	w(node, "invalid_bindable_declaration", "Bindable component properties are declared using `$bindable()` in runes mode. Did you forget to call the function?");
+}
+
+/**
+ * State referenced in its own scope will never update. Did you mean to reference it inside a closure?
+ * @param {null | NodeLike} node
+ */
+export function static_state_reference(node) {
+	w(node, "static_state_reference", "State referenced in its own scope will never update. Did you mean to reference it inside a closure?");
+}
+
+/**
+ * The rest operator (...) will create a new object and binding '%name%' with the original object will not work
+ * @param {null | NodeLike} node
+ * @param {string} name
+ */
+export function invalid_rest_eachblock_binding(node, name) {
+	w(node, "invalid_rest_eachblock_binding", `The rest operator (...) will create a new object and binding '${name}' with the original object will not work`);
+}
\ No newline at end of file
diff --git a/packages/svelte/tests/css/samples/attribute-selector-case-sensitive/_config.js b/packages/svelte/tests/css/samples/attribute-selector-case-sensitive/_config.js
index 4be32cf365..ec37410442 100644
--- a/packages/svelte/tests/css/samples/attribute-selector-case-sensitive/_config.js
+++ b/packages/svelte/tests/css/samples/attribute-selector-case-sensitive/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 44,
 				column: 14,
diff --git a/packages/svelte/tests/css/samples/descendant-selector-unmatched/_config.js b/packages/svelte/tests/css/samples/descendant-selector-unmatched/_config.js
index 509e5faec9..35258ef2b2 100644
--- a/packages/svelte/tests/css/samples/descendant-selector-unmatched/_config.js
+++ b/packages/svelte/tests/css/samples/descendant-selector-unmatched/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 33,
 				column: 6,
diff --git a/packages/svelte/tests/css/samples/dynamic-element/_config.js b/packages/svelte/tests/css/samples/dynamic-element/_config.js
index 3b6a14f232..48e47c1de4 100644
--- a/packages/svelte/tests/css/samples/dynamic-element/_config.js
+++ b/packages/svelte/tests/css/samples/dynamic-element/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".unused"',
 			start: {
 				character: 79,
diff --git a/packages/svelte/tests/css/samples/empty-class/_config.js b/packages/svelte/tests/css/samples/empty-class/_config.js
index 5f66a10535..d9e56228fb 100644
--- a/packages/svelte/tests/css/samples/empty-class/_config.js
+++ b/packages/svelte/tests/css/samples/empty-class/_config.js
@@ -4,7 +4,7 @@ export default test({
 	warnings: [
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".x"',
 			start: {
 				line: 4,
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-await/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-await/_config.js
index 8fdea81aaf..fbc374017b 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-await/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-await/_config.js
@@ -3,19 +3,19 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .c"',
 			start: { character: 269, column: 1, line: 15 },
 			end: { character: 276, column: 8, line: 15 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c ~ .d"',
 			start: { character: 296, column: 1, line: 16 },
 			end: { character: 303, column: 8, line: 16 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .d"',
 			start: { character: 323, column: 1, line: 17 },
 			end: { character: 330, column: 8, line: 17 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-each-else-nested/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-each-else-nested/_config.js
index ad86c2d045..82ff5d5e45 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-each-else-nested/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-each-else-nested/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".e ~ .f"',
 			start: { character: 812, column: 1, line: 35 },
 			end: { character: 819, column: 8, line: 35 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-each-else/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-each-else/_config.js
index e0059c8eb5..36182939d0 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-each-else/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-each-else/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .c"',
 			start: { character: 198, column: 1, line: 13 },
 			end: { character: 205, column: 8, line: 13 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js
index 36970ad4cd..a5d586d758 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .c"',
 			start: { character: 319, column: 1, line: 18 },
 			end: { character: 326, column: 8, line: 18 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js
index b6eba63bed..eb2f1a026a 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .c"',
 			start: { character: 215, column: 1, line: 14 },
 			end: { character: 222, column: 8, line: 14 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-if/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-if/_config.js
index 896b289fd1..38b4ad344b 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-if/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-if/_config.js
@@ -3,19 +3,19 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .c"',
 			start: { character: 269, column: 1, line: 16 },
 			end: { character: 276, column: 8, line: 16 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .d"',
 			start: { character: 296, column: 1, line: 17 },
 			end: { character: 303, column: 8, line: 17 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c ~ .d"',
 			start: { character: 323, column: 1, line: 18 },
 			end: { character: 330, column: 8, line: 18 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-rendertag-global/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-rendertag-global/_config.js
index 2038788f67..e59a88cb3f 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-rendertag-global/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-rendertag-global/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 479,
 				column: 19,
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-slot-global/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-slot-global/_config.js
index b595370622..9675b0be9f 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-slot-global/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-slot-global/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 472,
 				column: 19,
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-slot/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-slot/_config.js
index 1de4e6d06d..6fe2e4ac59 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-slot/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-slot/_config.js
@@ -3,37 +3,37 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a ~ .b"',
 			start: { character: 110, column: 1, line: 10 },
 			end: { character: 117, column: 8, line: 10 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .c"',
 			start: { character: 137, column: 1, line: 11 },
 			end: { character: 144, column: 8, line: 11 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c ~ .f"',
 			start: { character: 164, column: 1, line: 12 },
 			end: { character: 171, column: 8, line: 12 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".f ~ .g"',
 			start: { character: 191, column: 1, line: 13 },
 			end: { character: 198, column: 8, line: 13 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .f"',
 			start: { character: 218, column: 1, line: 14 },
 			end: { character: 225, column: 8, line: 14 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b ~ .g"',
 			start: { character: 245, column: 1, line: 15 },
 			end: { character: 252, column: 8, line: 15 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-star/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-star/_config.js
index 5828733842..665c914362 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-star/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-star/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".not-match > * ~ *"',
 			start: { character: 50, column: 1, line: 5 },
 			end: { character: 68, column: 19, line: 5 }
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator-svelteelement/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator-svelteelement/_config.js
index d9b40d6462..7c50a76bbb 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator-svelteelement/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator-svelteelement/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 496,
 				column: 10,
diff --git a/packages/svelte/tests/css/samples/general-siblings-combinator/_config.js b/packages/svelte/tests/css/samples/general-siblings-combinator/_config.js
index 47f2f5fb5c..2d93119179 100644
--- a/packages/svelte/tests/css/samples/general-siblings-combinator/_config.js
+++ b/packages/svelte/tests/css/samples/general-siblings-combinator/_config.js
@@ -3,25 +3,25 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "article ~ div"',
 			start: { character: 275, column: 1, line: 12 },
 			end: { character: 288, column: 14, line: 12 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "span ~ article"',
 			start: { character: 308, column: 1, line: 13 },
 			end: { character: 322, column: 15, line: 13 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "b ~ article"',
 			start: { character: 342, column: 1, line: 14 },
 			end: { character: 353, column: 12, line: 14 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "span ~ div"',
 			start: { character: 373, column: 1, line: 15 },
 			end: { character: 383, column: 11, line: 15 }
diff --git a/packages/svelte/tests/css/samples/global-block/_config.js b/packages/svelte/tests/css/samples/global-block/_config.js
index 53b9ee318f..430b45fe37 100644
--- a/packages/svelte/tests/css/samples/global-block/_config.js
+++ b/packages/svelte/tests/css/samples/global-block/_config.js
@@ -4,7 +4,7 @@ export default test({
 	warnings: [
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".unused :global"',
 			start: {
 				line: 16,
diff --git a/packages/svelte/tests/css/samples/global-with-unused-descendant/_config.js b/packages/svelte/tests/css/samples/global-with-unused-descendant/_config.js
index d30184a4b2..eb31e60fdc 100644
--- a/packages/svelte/tests/css/samples/global-with-unused-descendant/_config.js
+++ b/packages/svelte/tests/css/samples/global-with-unused-descendant/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ":global(.foo) .bar"',
 			start: { character: 9, column: 1, line: 2 },
 			end: { character: 27, column: 19, line: 2 }
diff --git a/packages/svelte/tests/css/samples/host/_config.js b/packages/svelte/tests/css/samples/host/_config.js
index e5c8c0fe0e..740593396b 100644
--- a/packages/svelte/tests/css/samples/host/_config.js
+++ b/packages/svelte/tests/css/samples/host/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ":host > span"',
 			start: {
 				character: 145,
diff --git a/packages/svelte/tests/css/samples/is/_config.js b/packages/svelte/tests/css/samples/is/_config.js
index 4a3961aaef..cb3a31ce20 100644
--- a/packages/svelte/tests/css/samples/is/_config.js
+++ b/packages/svelte/tests/css/samples/is/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 38,
 				column: 11,
diff --git a/packages/svelte/tests/css/samples/nested-css/_config.js b/packages/svelte/tests/css/samples/nested-css/_config.js
index e51fbe576c..128da8b3c7 100644
--- a/packages/svelte/tests/css/samples/nested-css/_config.js
+++ b/packages/svelte/tests/css/samples/nested-css/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 239,
 				column: 13,
@@ -17,7 +17,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 302,
 				column: 10,
@@ -31,7 +31,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 328,
 				column: 6,
@@ -45,7 +45,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 381,
 				column: 10,
@@ -59,7 +59,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 471,
 				column: 7,
@@ -73,7 +73,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 634,
 				column: 5,
@@ -87,7 +87,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 666,
 				column: 9,
diff --git a/packages/svelte/tests/css/samples/omit-scoping-attribute-descendant/_config.js b/packages/svelte/tests/css/samples/omit-scoping-attribute-descendant/_config.js
index 5385f5d600..8ec63cb987 100644
--- a/packages/svelte/tests/css/samples/omit-scoping-attribute-descendant/_config.js
+++ b/packages/svelte/tests/css/samples/omit-scoping-attribute-descendant/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "div > p"',
 			start: {
 				line: 8,
diff --git a/packages/svelte/tests/css/samples/preserve-specificity/input.svelte b/packages/svelte/tests/css/samples/preserve-specificity/input.svelte
index 1c0a594145..0314795199 100644
--- a/packages/svelte/tests/css/samples/preserve-specificity/input.svelte
+++ b/packages/svelte/tests/css/samples/preserve-specificity/input.svelte
@@ -1,4 +1,4 @@
-<!-- svelte-ignore a11y-missing-attribute -->
+<!-- svelte-ignore a11y_missing_attribute -->
 <a>
   <b>
     <c>
@@ -21,4 +21,4 @@
   .foo {
     color: green;
   }
-</style>
\ No newline at end of file
+</style>
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-await/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-await/_config.js
index 69049c7e83..46e3b331b8 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-await/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-await/_config.js
@@ -3,25 +3,25 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .e"',
 			start: { character: 242, column: 1, line: 14 },
 			end: { character: 249, column: 8, line: 14 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .c"',
 			start: { character: 269, column: 1, line: 15 },
 			end: { character: 276, column: 8, line: 15 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .d"',
 			start: { character: 296, column: 1, line: 16 },
 			end: { character: 303, column: 8, line: 16 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .d"',
 			start: { character: 323, column: 1, line: 17 },
 			end: { character: 330, column: 8, line: 17 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-each-2/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-each-2/_config.js
index ce7e3793c7..cbc6316442 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-each-2/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-each-2/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .c"',
 			start: { character: 320, column: 1, line: 26 },
 			end: { character: 327, column: 8, line: 26 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-each-else-nested/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-each-else-nested/_config.js
index b7f24a8881..6ea62ad0c5 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-each-else-nested/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-each-else-nested/_config.js
@@ -3,61 +3,61 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .c"',
 			start: { character: 478, column: 1, line: 23 },
 			end: { character: 485, column: 8, line: 23 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .g"',
 			start: { character: 505, column: 1, line: 24 },
 			end: { character: 512, column: 8, line: 24 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .e"',
 			start: { character: 532, column: 1, line: 25 },
 			end: { character: 539, column: 8, line: 25 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .g"',
 			start: { character: 559, column: 1, line: 26 },
 			end: { character: 566, column: 8, line: 26 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .k"',
 			start: { character: 586, column: 1, line: 27 },
 			end: { character: 593, column: 8, line: 27 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".d + .d"',
 			start: { character: 613, column: 1, line: 28 },
 			end: { character: 620, column: 8, line: 28 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".e + .f"',
 			start: { character: 640, column: 1, line: 29 },
 			end: { character: 647, column: 8, line: 29 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".f + .f"',
 			start: { character: 667, column: 1, line: 30 },
 			end: { character: 674, column: 8, line: 30 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".g + .j"',
 			start: { character: 694, column: 1, line: 31 },
 			end: { character: 701, column: 8, line: 31 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".g + .h + .i + .j"',
 			start: { character: 721, column: 1, line: 32 },
 			end: { character: 738, column: 18, line: 32 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-each-else/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-each-else/_config.js
index 0014358f74..3d1c4659f4 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-each-else/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-each-else/_config.js
@@ -3,13 +3,13 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .d"',
 			start: { character: 171, column: 1, line: 12 },
 			end: { character: 178, column: 8, line: 12 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .c"',
 			start: { character: 198, column: 1, line: 13 },
 			end: { character: 205, column: 8, line: 13 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-each-nested/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-each-nested/_config.js
index c21cbb7df4..847a6184de 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-each-nested/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-each-nested/_config.js
@@ -3,49 +3,49 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .h"',
 			start: { character: 1229, column: 1, line: 58 },
 			end: { character: 1236, column: 8, line: 58 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .i"',
 			start: { character: 1256, column: 1, line: 59 },
 			end: { character: 1263, column: 8, line: 59 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .h"',
 			start: { character: 1283, column: 1, line: 60 },
 			end: { character: 1290, column: 8, line: 60 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .i"',
 			start: { character: 1310, column: 1, line: 61 },
 			end: { character: 1317, column: 8, line: 61 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".d + .f"',
 			start: { character: 1337, column: 1, line: 62 },
 			end: { character: 1344, column: 8, line: 62 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".d + .g"',
 			start: { character: 1364, column: 1, line: 63 },
 			end: { character: 1371, column: 8, line: 63 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".e + .g"',
 			start: { character: 1391, column: 1, line: 64 },
 			end: { character: 1398, column: 8, line: 64 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".g + .i"',
 			start: { character: 1418, column: 1, line: 65 },
 			end: { character: 1425, column: 8, line: 65 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-global/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-global/_config.js
index 8600db6013..539ea5e2b6 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-global/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-global/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ":global(input) + span"',
 			start: {
 				character: 239,
@@ -17,7 +17,7 @@ export default test({
 			}
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ":global(input) ~ span"',
 			start: {
 				character: 279,
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js
index 61117e1086..da7e9cb522 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .c"',
 			start: { character: 319, column: 1, line: 18 },
 			end: { character: 326, column: 8, line: 18 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive/_config.js
index b823529970..39738d3fb9 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-if-not-exhaustive/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .c"',
 			start: { character: 215, column: 1, line: 14 },
 			end: { character: 222, column: 8, line: 14 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-if/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-if/_config.js
index 5903e9645b..16883232a2 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-if/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-if/_config.js
@@ -3,25 +3,25 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .e"',
 			start: { character: 242, column: 1, line: 15 },
 			end: { character: 249, column: 8, line: 15 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .c"',
 			start: { character: 269, column: 1, line: 16 },
 			end: { character: 276, column: 8, line: 16 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .d"',
 			start: { character: 296, column: 1, line: 17 },
 			end: { character: 303, column: 8, line: 17 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .d"',
 			start: { character: 323, column: 1, line: 18 },
 			end: { character: 330, column: 8, line: 18 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-slot/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-slot/_config.js
index b1c2369ab7..d13a8d726b 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-slot/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-slot/_config.js
@@ -3,19 +3,19 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".a + .b"',
 			start: { character: 83, column: 1, line: 9 },
 			end: { character: 90, column: 8, line: 9 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".b + .c"',
 			start: { character: 110, column: 1, line: 10 },
 			end: { character: 117, column: 8, line: 10 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".c + .f"',
 			start: { character: 137, column: 1, line: 11 },
 			end: { character: 144, column: 8, line: 11 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator-star/_config.js b/packages/svelte/tests/css/samples/siblings-combinator-star/_config.js
index 99ed8d1efa..f9ad4bca0c 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator-star/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator-star/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".not-match > * + *"',
 			start: { character: 50, column: 1, line: 5 },
 			end: { character: 68, column: 19, line: 5 }
diff --git a/packages/svelte/tests/css/samples/siblings-combinator/_config.js b/packages/svelte/tests/css/samples/siblings-combinator/_config.js
index 438bbc574b..8ef8aac908 100644
--- a/packages/svelte/tests/css/samples/siblings-combinator/_config.js
+++ b/packages/svelte/tests/css/samples/siblings-combinator/_config.js
@@ -3,25 +3,25 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "article + div"',
 			start: { character: 45, column: 1, line: 5 },
 			end: { character: 58, column: 14, line: 5 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "span + article"',
 			start: { character: 81, column: 1, line: 8 },
 			end: { character: 95, column: 15, line: 8 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "b + article"',
 			start: { character: 118, column: 1, line: 11 },
 			end: { character: 129, column: 12, line: 11 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "span + div"',
 			start: { character: 152, column: 1, line: 14 },
 			end: { character: 162, column: 11, line: 14 }
diff --git a/packages/svelte/tests/css/samples/unused-selector-child-combinator/_config.js b/packages/svelte/tests/css/samples/unused-selector-child-combinator/_config.js
index cc9927ae0f..6dc7f0411e 100644
--- a/packages/svelte/tests/css/samples/unused-selector-child-combinator/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-child-combinator/_config.js
@@ -3,19 +3,19 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "article > *"',
 			start: { character: 9, column: 1, line: 2 },
 			end: { character: 20, column: 12, line: 2 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "article *"',
 			start: { character: 47, column: 1, line: 6 },
 			end: { character: 56, column: 10, line: 6 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".article > *"',
 			start: { character: 83, column: 1, line: 10 },
 			end: { character: 95, column: 13, line: 10 }
diff --git a/packages/svelte/tests/css/samples/unused-selector-empty-attribute/_config.js b/packages/svelte/tests/css/samples/unused-selector-empty-attribute/_config.js
index 3628524f69..004ba8954b 100644
--- a/packages/svelte/tests/css/samples/unused-selector-empty-attribute/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-empty-attribute/_config.js
@@ -4,7 +4,7 @@ export default test({
 	warnings: [
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector "img[alt=""]"',
 			start: {
 				character: 87,
diff --git a/packages/svelte/tests/css/samples/unused-selector-leading/_config.js b/packages/svelte/tests/css/samples/unused-selector-leading/_config.js
index a428fa803f..fcf70cb7b9 100644
--- a/packages/svelte/tests/css/samples/unused-selector-leading/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-leading/_config.js
@@ -4,7 +4,7 @@ export default test({
 	warnings: [
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".foo"',
 			start: {
 				line: 4,
@@ -20,7 +20,7 @@ export default test({
 
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".baz"',
 			start: {
 				line: 4,
diff --git a/packages/svelte/tests/css/samples/unused-selector-string-concat/_config.js b/packages/svelte/tests/css/samples/unused-selector-string-concat/_config.js
index 8318e58856..a779778516 100644
--- a/packages/svelte/tests/css/samples/unused-selector-string-concat/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-string-concat/_config.js
@@ -3,61 +3,61 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".fooaa"',
 			start: { line: 11, column: 2, character: 206 },
 			end: { line: 11, column: 8, character: 212 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".foobb"',
 			start: { line: 12, column: 2, character: 229 },
 			end: { line: 12, column: 8, character: 235 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".foodd"',
 			start: { line: 14, column: 2, character: 275 },
 			end: { line: 14, column: 8, character: 281 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".bbbar"',
 			start: { line: 20, column: 2, character: 401 },
 			end: { line: 20, column: 8, character: 407 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".ccbar"',
 			start: { line: 21, column: 2, character: 424 },
 			end: { line: 21, column: 8, character: 430 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".ddbar"',
 			start: { line: 22, column: 2, character: 447 },
 			end: { line: 22, column: 8, character: 453 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".fooaabar"',
 			start: { line: 23, column: 2, character: 470 },
 			end: { line: 23, column: 11, character: 479 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".foobbbar"',
 			start: { line: 24, column: 2, character: 496 },
 			end: { line: 24, column: 11, character: 505 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".fooccbar"',
 			start: { line: 25, column: 2, character: 522 },
 			end: { line: 25, column: 11, character: 531 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".unused"',
 			start: { line: 28, column: 2, character: 595 },
 			end: { line: 28, column: 9, character: 602 }
diff --git a/packages/svelte/tests/css/samples/unused-selector-ternary-concat/_config.js b/packages/svelte/tests/css/samples/unused-selector-ternary-concat/_config.js
index 52caa7e457..96fad08e3f 100644
--- a/packages/svelte/tests/css/samples/unused-selector-ternary-concat/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-ternary-concat/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".unused"',
 			start: {
 				character: 198,
diff --git a/packages/svelte/tests/css/samples/unused-selector-ternary-nested/_config.js b/packages/svelte/tests/css/samples/unused-selector-ternary-nested/_config.js
index 43f6e628b8..b74ccce347 100644
--- a/packages/svelte/tests/css/samples/unused-selector-ternary-nested/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-ternary-nested/_config.js
@@ -3,13 +3,13 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".hover.unused"',
 			start: { line: 15, column: 2, character: 261 },
 			end: { line: 15, column: 15, character: 274 }
 		},
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".unused"',
 			start: { line: 17, column: 2, character: 295 },
 			end: { line: 17, column: 9, character: 302 }
diff --git a/packages/svelte/tests/css/samples/unused-selector-ternary/_config.js b/packages/svelte/tests/css/samples/unused-selector-ternary/_config.js
index 05ac58e36c..b8acc30e2d 100644
--- a/packages/svelte/tests/css/samples/unused-selector-ternary/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-ternary/_config.js
@@ -7,7 +7,7 @@ export default test({
 	warnings: [
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".maybeactive"',
 			start: {
 				line: 16,
diff --git a/packages/svelte/tests/css/samples/unused-selector-trailing/_config.js b/packages/svelte/tests/css/samples/unused-selector-trailing/_config.js
index 1504399317..2f30d40d27 100644
--- a/packages/svelte/tests/css/samples/unused-selector-trailing/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector-trailing/_config.js
@@ -3,7 +3,7 @@ import { test } from '../../test';
 export default test({
 	warnings: [
 		{
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			end: {
 				character: 32,
 				column: 3,
diff --git a/packages/svelte/tests/css/samples/unused-selector/_config.js b/packages/svelte/tests/css/samples/unused-selector/_config.js
index 2a9d738386..a95a24d738 100644
--- a/packages/svelte/tests/css/samples/unused-selector/_config.js
+++ b/packages/svelte/tests/css/samples/unused-selector/_config.js
@@ -4,7 +4,7 @@ export default test({
 	warnings: [
 		{
 			filename: 'SvelteComponent.svelte',
-			code: 'css-unused-selector',
+			code: 'css_unused_selector',
 			message: 'Unused CSS selector ".bar"',
 			start: {
 				line: 8,
diff --git a/packages/svelte/tests/runtime-browser/custom-elements-samples/extended-builtin/_config.js b/packages/svelte/tests/runtime-browser/custom-elements-samples/extended-builtin/_config.js
index 28c6bdae4c..dfb291476d 100644
--- a/packages/svelte/tests/runtime-browser/custom-elements-samples/extended-builtin/_config.js
+++ b/packages/svelte/tests/runtime-browser/custom-elements-samples/extended-builtin/_config.js
@@ -4,7 +4,7 @@ const tick = () => Promise.resolve();
 export default test({
 	warnings: [
 		{
-			code: 'avoid-is',
+			code: 'avoid_is',
 			message: 'The "is" attribute is not supported cross-browser and should be avoided',
 			start: {
 				character: 109,
diff --git a/packages/svelte/tests/validator/samples/a11y-alt-text/warnings.json b/packages/svelte/tests/validator/samples/a11y-alt-text/warnings.json
index 904288c45c..8a21f3cfe3 100644
--- a/packages/svelte/tests/validator/samples/a11y-alt-text/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-alt-text/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <img> element should have an alt attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<img> element should have an alt attribute",
 		"start": {
 			"line": 1,
 			"column": 0
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <area> element should have an alt, aria-label or aria-labelledby attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<area> element should have an alt, aria-label or aria-labelledby attribute",
 		"start": {
 			"line": 4,
 			"column": 1
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <object> element should have a title, aria-label or aria-labelledby attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<object> element should have a title, aria-label or aria-labelledby attribute",
 		"start": {
 			"line": 7,
 			"column": 0
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <input type=\"image\"> element should have an alt, aria-label or aria-labelledby attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<input type=\"image\"> element should have an alt, aria-label or aria-labelledby attribute",
 		"start": {
 			"line": 9,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-anchor-has-content/warnings.json b/packages/svelte/tests/validator/samples/a11y-anchor-has-content/warnings.json
index d9076ddba1..0227195c21 100644
--- a/packages/svelte/tests/validator/samples/a11y-anchor-has-content/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-anchor-has-content/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-content",
-		"message": "A11y: <a> element should have child content",
+		"code": "a11y_missing_content",
+		"message": "<a> element should have child content",
 		"start": {
 			"line": 1,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-anchor-in-svg-is-valid/warnings.json b/packages/svelte/tests/validator/samples/a11y-anchor-in-svg-is-valid/warnings.json
index 0ca16767d7..ba46443d65 100644
--- a/packages/svelte/tests/validator/samples/a11y-anchor-in-svg-is-valid/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-anchor-in-svg-is-valid/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <a> element should have an href attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<a> element should have an href attribute",
 		"start": {
 			"line": 1,
 			"column": 11
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-invalid-attribute",
-		"message": "A11y: '' is not a valid xlink:href attribute",
+		"code": "a11y_invalid_attribute",
+		"message": "'' is not a valid xlink:href attribute",
 		"start": {
 			"line": 2,
 			"column": 14
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-invalid-attribute",
-		"message": "A11y: '#' is not a valid xlink:href attribute",
+		"code": "a11y_invalid_attribute",
+		"message": "'#' is not a valid xlink:href attribute",
 		"start": {
 			"line": 3,
 			"column": 14
diff --git a/packages/svelte/tests/validator/samples/a11y-anchor-is-valid/warnings.json b/packages/svelte/tests/validator/samples/a11y-anchor-is-valid/warnings.json
index 50d19ae630..8ecb5cff24 100644
--- a/packages/svelte/tests/validator/samples/a11y-anchor-is-valid/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-anchor-is-valid/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <a> element should have an href attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<a> element should have an href attribute",
 		"start": {
 			"line": 1,
 			"column": 0
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-invalid-attribute",
-		"message": "A11y: '' is not a valid href attribute",
+		"code": "a11y_invalid_attribute",
+		"message": "'' is not a valid href attribute",
 		"start": {
 			"line": 2,
 			"column": 3
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-invalid-attribute",
-		"message": "A11y: '#' is not a valid href attribute",
+		"code": "a11y_invalid_attribute",
+		"message": "'#' is not a valid href attribute",
 		"start": {
 			"line": 3,
 			"column": 3
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-invalid-attribute",
-		"message": "A11y: 'javascript:void(0)' is not a valid href attribute",
+		"code": "a11y_invalid_attribute",
+		"message": "'javascript:void(0)' is not a valid href attribute",
 		"start": {
 			"line": 4,
 			"column": 3
@@ -48,8 +48,8 @@
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <a> element should have an href attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<a> element should have an href attribute",
 		"start": {
 			"line": 5,
 			"column": 0
@@ -60,8 +60,8 @@
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <a> element should have an href attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<a> element should have an href attribute",
 		"start": {
 			"line": 6,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-activedescendant/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-activedescendant/warnings.json
index 186a18666f..79532f4723 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-activedescendant/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-activedescendant/warnings.json
@@ -1,11 +1,11 @@
 [
 	{
-		"code": "a11y-aria-activedescendant-has-tabindex",
+		"code": "a11y_aria_activedescendant_has_tabindex",
 		"end": {
 			"column": 36,
 			"line": 16
 		},
-		"message": "A11y: Elements with attribute aria-activedescendant should have tabindex value",
+		"message": "Elements with attribute aria-activedescendant should have tabindex value",
 		"start": {
 			"column": 5,
 			"line": 16
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-props/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-props/warnings.json
index f357429f62..cd36ffd42d 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-props/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-props/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-unknown-aria-attribute",
-		"message": "A11y: Unknown aria attribute 'aria-labeledby' (did you mean 'labelledby'?)",
+		"code": "a11y_unknown_aria_attribute_suggestion",
+		"message": "Unknown aria attribute 'aria-labeledby'. Did you mean 'labelledby'?",
 		"start": {
 			"line": 1,
 			"column": 20
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <input type=\"image\"> element should have an alt, aria-label or aria-labelledby attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<input type=\"image\"> element should have an alt, aria-label or aria-labelledby attribute",
 		"start": {
 			"column": 0,
 			"line": 1
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-boolean/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-boolean/warnings.json
index 61cd1aabba..10320c4308 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-boolean/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-boolean/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-disabled' must be exactly one of true or false",
+		"code": "a11y_incorrect_aria_attribute_type_boolean",
+		"message": "The value of 'aria-disabled' must be either 'true' or 'false'",
 		"start": {
 			"line": 5,
 			"column": 8
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-disabled' must be exactly one of true or false",
+		"code": "a11y_incorrect_aria_attribute_type_boolean",
+		"message": "The value of 'aria-disabled' must be either 'true' or 'false'",
 		"start": {
 			"line": 6,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-integer/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-integer/warnings.json
index 51b31e70ef..d8be2ef8cd 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-integer/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-integer/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-level' must be of type integer",
+		"code": "a11y_incorrect_aria_attribute_type_integer",
+		"message": "The value of 'aria-level' must be an integer",
 		"start": {
 			"line": 1,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-level' must be of type integer",
+		"code": "a11y_incorrect_aria_attribute_type_integer",
+		"message": "The value of 'aria-level' must be an integer",
 		"start": {
 			"line": 2,
 			"column": 5
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-level' must be of type integer",
+		"code": "a11y_incorrect_aria_attribute_type_integer",
+		"message": "The value of 'aria-level' must be an integer",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-number/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-number/warnings.json
index e28a43df37..ed5283f797 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-number/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-number/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-valuemax' must be of type number",
+		"code": "a11y_incorrect_aria_attribute_type",
+		"message": "The value of 'aria-valuemax' must be of type number",
 		"start": {
 			"line": 1,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-valuemax' must be of type number",
+		"code": "a11y_incorrect_aria_attribute_type",
+		"message": "The value of 'aria-valuemax' must be of type number",
 		"start": {
 			"line": 2,
 			"column": 5
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-valuemax' must be of type number",
+		"code": "a11y_incorrect_aria_attribute_type",
+		"message": "The value of 'aria-valuemax' must be of type number",
 		"start": {
 			"line": 5,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-string/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-string/warnings.json
index 2dd8f2509f..3a93dbcee6 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-string/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-string/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-label' must be of type string",
+		"code": "a11y_incorrect_aria_attribute_type",
+		"message": "The value of 'aria-label' must be of type string",
 		"start": {
 			"line": 1,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-token/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-token/warnings.json
index 555f956d95..fea249be0a 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-token/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-token/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-sort' must be exactly one of ascending, descending, none, other",
+		"code": "a11y_incorrect_aria_attribute_type_token",
+		"message": "The value of 'aria-sort' must be exactly one of \"ascending\", \"descending\", \"none\" or \"other\"",
 		"start": {
 			"line": 1,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-sort' must be exactly one of ascending, descending, none, other",
+		"code": "a11y_incorrect_aria_attribute_type_token",
+		"message": "The value of 'aria-sort' must be exactly one of \"ascending\", \"descending\", \"none\" or \"other\"",
 		"start": {
 			"line": 2,
 			"column": 5
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-sort' must be exactly one of ascending, descending, none, other",
+		"code": "a11y_incorrect_aria_attribute_type_token",
+		"message": "The value of 'aria-sort' must be exactly one of \"ascending\", \"descending\", \"none\" or \"other\"",
 		"start": {
 			"line": 3,
 			"column": 5
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-sort' must be exactly one of ascending, descending, none, other",
+		"code": "a11y_incorrect_aria_attribute_type_token",
+		"message": "The value of 'aria-sort' must be exactly one of \"ascending\", \"descending\", \"none\" or \"other\"",
 		"start": {
 			"line": 6,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tokenlist/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tokenlist/warnings.json
index 408a0db916..10a92d1790 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tokenlist/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tokenlist/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-relevant' must be a space-separated list of one or more of additions, all, removals, text",
+		"code": "a11y_incorrect_aria_attribute_type_tokenlist",
+		"message": "The value of 'aria-relevant' must be a space-separated list of one or more of \"additions\", \"all\", \"removals\" or \"text\"",
 		"start": {
 			"line": 1,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-relevant' must be a space-separated list of one or more of additions, all, removals, text",
+		"code": "a11y_incorrect_aria_attribute_type_tokenlist",
+		"message": "The value of 'aria-relevant' must be a space-separated list of one or more of \"additions\", \"all\", \"removals\" or \"text\"",
 		"start": {
 			"line": 2,
 			"column": 5
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-relevant' must be a space-separated list of one or more of additions, all, removals, text",
+		"code": "a11y_incorrect_aria_attribute_type_tokenlist",
+		"message": "The value of 'aria-relevant' must be a space-separated list of one or more of \"additions\", \"all\", \"removals\" or \"text\"",
 		"start": {
 			"line": 3,
 			"column": 5
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-relevant' must be a space-separated list of one or more of additions, all, removals, text",
+		"code": "a11y_incorrect_aria_attribute_type_tokenlist",
+		"message": "The value of 'aria-relevant' must be a space-separated list of one or more of \"additions\", \"all\", \"removals\" or \"text\"",
 		"start": {
 			"line": 6,
 			"column": 5
@@ -48,8 +48,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-relevant' must be a space-separated list of one or more of additions, all, removals, text",
+		"code": "a11y_incorrect_aria_attribute_type_tokenlist",
+		"message": "The value of 'aria-relevant' must be a space-separated list of one or more of \"additions\", \"all\", \"removals\" or \"text\"",
 		"start": {
 			"line": 7,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tristate/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tristate/warnings.json
index 2733b2ad18..d623a38d88 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tristate/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-proptypes-tristate/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-checked' must be exactly one of true, false, or mixed",
+		"code": "a11y_incorrect_aria_attribute_type_tristate",
+		"message": "The value of 'aria-checked' must be exactly one of true, false, or mixed",
 		"start": {
 			"line": 5,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-incorrect-aria-attribute-type",
-		"message": "A11y: The value of 'aria-checked' must be exactly one of true, false, or mixed",
+		"code": "a11y_incorrect_aria_attribute_type_tristate",
+		"message": "The value of 'aria-checked' must be exactly one of true, false, or mixed",
 		"start": {
 			"line": 6,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-role/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-role/warnings.json
index 49581ac003..3b250958b0 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-role/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-role/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-unknown-role",
-		"message": "A11y: Unknown role 'toooltip' (did you mean 'tooltip'?)",
+		"code": "a11y_unknown_role_suggestion",
+		"message": "Unknown role 'toooltip'. Did you mean 'tooltip'?",
 		"start": {
 			"line": 6,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-unknown-role",
-		"message": "A11y: Unknown role 'toooltip' (did you mean 'tooltip'?)",
+		"code": "a11y_unknown_role_suggestion",
+		"message": "Unknown role 'toooltip'. Did you mean 'tooltip'?",
 		"start": {
 			"line": 7,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-aria-unsupported-element/warnings.json b/packages/svelte/tests/validator/samples/a11y-aria-unsupported-element/warnings.json
index 04891378b0..3a56930a12 100644
--- a/packages/svelte/tests/validator/samples/a11y-aria-unsupported-element/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-aria-unsupported-element/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-aria-attributes",
-		"message": "A11y: <meta> should not have aria-* attributes",
+		"code": "a11y_aria_attributes",
+		"message": "<meta> should not have aria-* attributes",
 		"start": {
 			"line": 1,
 			"column": 6
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-misplaced-role",
-		"message": "A11y: <meta> should not have role attribute",
+		"code": "a11y_misplaced_role",
+		"message": "<meta> should not have role attribute",
 		"start": {
 			"line": 2,
 			"column": 6
diff --git a/packages/svelte/tests/validator/samples/a11y-autocomplete-valid/warnings.json b/packages/svelte/tests/validator/samples/a11y-autocomplete-valid/warnings.json
index 470cfff1fb..a09a819de1 100644
--- a/packages/svelte/tests/validator/samples/a11y-autocomplete-valid/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-autocomplete-valid/warnings.json
@@ -1,35 +1,35 @@
 [
 	{
-		"code": "a11y-autocomplete-valid",
+		"code": "a11y_autocomplete_valid",
 		"end": {
 			"column": 31,
 			"line": 25
 		},
-		"message": "A11y: The value 'true' is not supported by the attribute 'autocomplete' on element <input type=\"text\">",
+		"message": "The value 'true' is not supported by the attribute 'autocomplete' on element <input type=\"text\">",
 		"start": {
 			"column": 19,
 			"line": 25
 		}
 	},
 	{
-		"code": "a11y-autocomplete-valid",
+		"code": "a11y_autocomplete_valid",
 		"end": {
 			"column": 43,
 			"line": 26
 		},
-		"message": "A11y: The value 'incorrect' is not supported by the attribute 'autocomplete' on element <input type=\"text\">",
+		"message": "The value 'incorrect' is not supported by the attribute 'autocomplete' on element <input type=\"text\">",
 		"start": {
 			"column": 19,
 			"line": 26
 		}
 	},
 	{
-		"code": "a11y-autocomplete-valid",
+		"code": "a11y_autocomplete_valid",
 		"end": {
 			"column": 42,
 			"line": 27
 		},
-		"message": "A11y: The value 'webauthn' is not supported by the attribute 'autocomplete' on element <input type=\"text\">",
+		"message": "The value 'webauthn' is not supported by the attribute 'autocomplete' on element <input type=\"text\">",
 		"start": {
 			"column": 19,
 			"line": 27
diff --git a/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/input.svelte b/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/input.svelte
index c8c5d608f0..4ca8d30c4d 100644
--- a/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/input.svelte
+++ b/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/input.svelte
@@ -9,22 +9,22 @@
 </script>
 
 <!-- should warn -->
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} aria-hidden="false"></div>
 
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <section on:click={noop}></section>
-<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
 <main on:click={noop}></main>
-<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
 <article on:click={noop}></article>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <header on:click={noop}></header>
-<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
 <footer on:click={noop}></footer>
-<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
 <footer onclick={noop}></footer>
 
 <!-- should not warn -->
@@ -37,32 +37,32 @@
 <input type="button" on:click={noop} />
 <input type={dynamicTypeValue} on:click={noop} />
 
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} {...props}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keydown={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keyup={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keypress={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keydown={noop} on:keyup={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keyup={noop} on:keypress={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keypress={noop} on:keydown={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} on:keydown={noop} on:keyup={noop} on:keypress={noop}></div>
 
 <input on:click={noop} type="hidden" />
 
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} aria-hidden></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} aria-hidden="true"></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} aria-hidden="false" on:keydown={noop}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:click={noop} aria-hidden={dynamicAriaHiddenValue}></div>
 
 <div on:click={noop} role="presentation"></div>
@@ -70,5 +70,5 @@
 <div on:click={noop} role={dynamicRole}></div>
 <div onclick={noop} role={dynamicRole}></div>
 
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <svelte:element this={Math.random() ? 'button' : 'div'} on:click={noop} />
diff --git a/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/warnings.json b/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/warnings.json
index 87ec876987..49cfc849f1 100644
--- a/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-click-events-have-key-events/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 13,
 			"column": 0
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 15,
 			"column": 0
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 18,
 			"column": 0
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 20,
 			"column": 0
@@ -48,8 +48,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 22,
 			"column": 0
@@ -60,8 +60,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 24,
 			"column": 0
@@ -72,8 +72,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 26,
 			"column": 0
@@ -84,8 +84,8 @@
 		}
 	},
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"line": 28,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-figcaption-wrong-place/warnings.json b/packages/svelte/tests/validator/samples/a11y-figcaption-wrong-place/warnings.json
index c9cac1daf9..54b8f51f0e 100644
--- a/packages/svelte/tests/validator/samples/a11y-figcaption-wrong-place/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-figcaption-wrong-place/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-structure",
-		"message": "A11y: <figcaption> must be first or last child of <figure>",
+		"code": "a11y_figcaption_index",
+		"message": "`<figcaption>` must be first or last child of `<figure>`",
 		"start": {
 			"line": 4,
 			"column": 1
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-structure",
-		"message": "A11y: <figcaption> must be an immediate child of <figure>",
+		"code": "a11y_figcaption_parent",
+		"message": "`<figcaption>` must be an immediate child of `<figure>`",
 		"start": {
 			"line": 15,
 			"column": 2
diff --git a/packages/svelte/tests/validator/samples/a11y-heading-has-content/warnings.json b/packages/svelte/tests/validator/samples/a11y-heading-has-content/warnings.json
index ad5f5d4033..64604d61a3 100644
--- a/packages/svelte/tests/validator/samples/a11y-heading-has-content/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-heading-has-content/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-content",
-		"message": "A11y: <h1> element should have child content",
+		"code": "a11y_missing_content",
+		"message": "<h1> element should have child content",
 		"start": {
 			"line": 1,
 			"column": 0
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-hidden",
-		"message": "A11y: <h2> element should not be hidden",
+		"code": "a11y_hidden",
+		"message": "<h2> element should not be hidden",
 		"start": {
 			"line": 2,
 			"column": 4
diff --git a/packages/svelte/tests/validator/samples/a11y-html-has-lang/warnings.json b/packages/svelte/tests/validator/samples/a11y-html-has-lang/warnings.json
index 097e8e88bd..85eca6e407 100644
--- a/packages/svelte/tests/validator/samples/a11y-html-has-lang/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-html-has-lang/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <html> element should have a lang attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<html> element should have a lang attribute",
 		"start": {
 			"column": 0,
 			"line": 9
diff --git a/packages/svelte/tests/validator/samples/a11y-iframe-has-title/warnings.json b/packages/svelte/tests/validator/samples/a11y-iframe-has-title/warnings.json
index e78523931e..2d80b9b502 100644
--- a/packages/svelte/tests/validator/samples/a11y-iframe-has-title/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-iframe-has-title/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-missing-attribute",
-		"message": "A11y: <iframe> element should have a title attribute",
+		"code": "a11y_missing_attribute",
+		"message": "<iframe> element should have a title attribute",
 		"start": {
 			"line": 5,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-img-redundant-alt/warnings.json b/packages/svelte/tests/validator/samples/a11y-img-redundant-alt/warnings.json
index 9ba5a1c96e..b2b0e4f33a 100644
--- a/packages/svelte/tests/validator/samples/a11y-img-redundant-alt/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-img-redundant-alt/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-img-redundant-alt",
-		"message": "A11y: Screenreaders already announce <img> elements as an image.",
+		"code": "a11y_img_redundant_alt",
+		"message": "Screenreaders already announce <img> elements as an image.",
 		"end": {
 			"column": 49,
 			"line": 3
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-img-redundant-alt",
-		"message": "A11y: Screenreaders already announce <img> elements as an image.",
+		"code": "a11y_img_redundant_alt",
+		"message": "Screenreaders already announce <img> elements as an image.",
 		"end": {
 			"column": 45,
 			"line": 4
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-img-redundant-alt",
-		"message": "A11y: Screenreaders already announce <img> elements as an image.",
+		"code": "a11y_img_redundant_alt",
+		"message": "Screenreaders already announce <img> elements as an image.",
 		"end": {
 			"column": 52,
 			"line": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-interactive-supports-focus/warnings.json b/packages/svelte/tests/validator/samples/a11y-interactive-supports-focus/warnings.json
index 2034bc2bd5..7b4eaa049a 100644
--- a/packages/svelte/tests/validator/samples/a11y-interactive-supports-focus/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-interactive-supports-focus/warnings.json
@@ -1,275 +1,275 @@
 [
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 48,
 			"line": 11
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 11
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 51,
 			"line": 12
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 12
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 45,
 			"line": 13
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 13
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 72,
 			"line": 14
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 14
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 51,
 			"line": 15
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 15
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 52,
 			"line": 16
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 16
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 44,
 			"line": 17
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 17
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 51,
 			"line": 18
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 18
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 49,
 			"line": 19
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 19
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 52,
 			"line": 20
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 20
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 49,
 			"line": 21
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 21
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 52,
 			"line": 22
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 22
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 49,
 			"line": 23
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 23
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 48,
 			"line": 24
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 24
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 49,
 			"line": 25
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 25
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 54,
 			"line": 26
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 26
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 50,
 			"line": 27
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 27
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 53,
 			"line": 28
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 28
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 48,
 			"line": 29
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 29
 		}
 	},
 	{
-		"code": "a11y-mouse-events-have-key-events",
+		"code": "a11y_mouse_events_have_key_events",
 		"end": {
 			"column": 48,
 			"line": 29
 		},
-		"message": "A11y: 'mouseout' event must be accompanied by 'blur' event",
+		"message": "'mouseout' event must be accompanied by 'blur' event",
 		"start": {
 			"column": 0,
 			"line": 29
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 53,
 			"line": 30
 		},
-		"message": "A11y: Elements with the 'menuitem' interactive role must have a tabindex value.",
+		"message": "Elements with the 'menuitem' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 30
 		}
 	},
 	{
-		"code": "a11y-mouse-events-have-key-events",
+		"code": "a11y_mouse_events_have_key_events",
 		"end": {
 			"column": 53,
 			"line": 30
 		},
-		"message": "A11y: 'mouseover' event must be accompanied by 'focus' event",
+		"message": "'mouseover' event must be accompanied by 'focus' event",
 		"start": {
 			"column": 0,
 			"line": 30
 		}
 	},
 	{
-		"code": "a11y-interactive-supports-focus",
+		"code": "a11y_interactive_supports_focus",
 		"end": {
 			"column": 47,
 			"line": 31
 		},
-		"message": "A11y: Elements with the 'button' interactive role must have a tabindex value.",
+		"message": "Elements with the 'button' interactive role must have a tabindex value.",
 		"start": {
 			"column": 0,
 			"line": 31
diff --git a/packages/svelte/tests/validator/samples/a11y-label-has-associated-control/warnings.json b/packages/svelte/tests/validator/samples/a11y-label-has-associated-control/warnings.json
index 4bbaf6c6c2..2ac34c4bee 100644
--- a/packages/svelte/tests/validator/samples/a11y-label-has-associated-control/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-label-has-associated-control/warnings.json
@@ -1,23 +1,23 @@
 [
 	{
-		"code": "a11y-label-has-associated-control",
+		"code": "a11y_label_has_associated_control",
 		"end": {
 			"column": 16,
 			"line": 5
 		},
-		"message": "A11y: A form label must be associated with a control.",
+		"message": "A form label must be associated with a control.",
 		"start": {
 			"column": 0,
 			"line": 5
 		}
 	},
 	{
-		"code": "a11y-label-has-associated-control",
+		"code": "a11y_label_has_associated_control",
 		"end": {
 			"column": 30,
 			"line": 10
 		},
-		"message": "A11y: A form label must be associated with a control.",
+		"message": "A form label must be associated with a control.",
 		"start": {
 			"column": 0,
 			"line": 10
diff --git a/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json b/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json
index a438bbdc0f..cfefede261 100644
--- a/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json
@@ -1,47 +1,47 @@
 [
 	{
-		"code": "a11y-media-has-caption",
+		"code": "a11y_media_has_caption",
 		"end": {
 			"column": 15,
 			"line": 2
 		},
-		"message": "A11y: <video> elements must have a <track kind=\"captions\">",
+		"message": "<video> elements must have a <track kind=\"captions\">",
 		"start": {
 			"column": 0,
 			"line": 2
 		}
 	},
 	{
-		"code": "a11y-media-has-caption",
+		"code": "a11y_media_has_caption",
 		"end": {
 			"column": 24,
 			"line": 3
 		},
-		"message": "A11y: <video> elements must have a <track kind=\"captions\">",
+		"message": "<video> elements must have a <track kind=\"captions\">",
 		"start": {
 			"column": 0,
 			"line": 3
 		}
 	},
 	{
-		"code": "a11y-media-has-caption",
+		"code": "a11y_media_has_caption",
 		"end": {
 			"column": 27,
 			"line": 5
 		},
-		"message": "A11y: <video> elements must have a <track kind=\"captions\">",
+		"message": "<video> elements must have a <track kind=\"captions\">",
 		"start": {
 			"column": 0,
 			"line": 5
 		}
 	},
 	{
-		"code": "a11y-media-has-caption",
+		"code": "a11y_media_has_caption",
 		"end": {
 			"column": 35,
 			"line": 6
 		},
-		"message": "A11y: <video> elements must have a <track kind=\"captions\">",
+		"message": "<video> elements must have a <track kind=\"captions\">",
 		"start": {
 			"column": 0,
 			"line": 6
diff --git a/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/input.svelte b/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/input.svelte
index 3c7d6aeb12..613b80e6d9 100644
--- a/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/input.svelte
+++ b/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/input.svelte
@@ -7,15 +7,15 @@
 	};
 </script>
 
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:mouseover={() => void 0}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:mouseover={() => void 0} on:focus={() => void 0}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:mouseover={() => void 0} {...otherProps}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:mouseout={() => void 0}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:mouseout={() => void 0} on:blur={() => void 0}></div>
-<!-- svelte-ignore a11y-no-static-element-interactions -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
 <div on:mouseout={() => void 0} {...otherProps}></div>
diff --git a/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/warnings.json b/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/warnings.json
index 42aeab3fde..574b019e0f 100644
--- a/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-mouse-events-have-key-events/warnings.json
@@ -1,47 +1,47 @@
 [
 	{
-		"code": "a11y-mouse-events-have-key-events",
+		"code": "a11y_mouse_events_have_key_events",
 		"end": {
 			"column": 39,
 			"line": 11
 		},
-		"message": "A11y: 'mouseover' event must be accompanied by 'focus' event",
+		"message": "'mouseover' event must be accompanied by 'focus' event",
 		"start": {
 			"column": 0,
 			"line": 11
 		}
 	},
 	{
-		"code": "a11y-mouse-events-have-key-events",
+		"code": "a11y_mouse_events_have_key_events",
 		"end": {
 			"column": 55,
 			"line": 15
 		},
-		"message": "A11y: 'mouseover' event must be accompanied by 'focus' event",
+		"message": "'mouseover' event must be accompanied by 'focus' event",
 		"start": {
 			"column": 0,
 			"line": 15
 		}
 	},
 	{
-		"code": "a11y-mouse-events-have-key-events",
+		"code": "a11y_mouse_events_have_key_events",
 		"end": {
 			"column": 38,
 			"line": 17
 		},
-		"message": "A11y: 'mouseout' event must be accompanied by 'blur' event",
+		"message": "'mouseout' event must be accompanied by 'blur' event",
 		"start": {
 			"column": 0,
 			"line": 17
 		}
 	},
 	{
-		"code": "a11y-mouse-events-have-key-events",
+		"code": "a11y_mouse_events_have_key_events",
 		"end": {
 			"column": 54,
 			"line": 21
 		},
-		"message": "A11y: 'mouseout' event must be accompanied by 'blur' event",
+		"message": "'mouseout' event must be accompanied by 'blur' event",
 		"start": {
 			"column": 0,
 			"line": 21
diff --git a/packages/svelte/tests/validator/samples/a11y-no-abstract-roles/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-abstract-roles/warnings.json
index c17ae461f9..a7345a2834 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-abstract-roles/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-abstract-roles/warnings.json
@@ -1,143 +1,143 @@
 [
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 19,
 			"line": 1
 		},
-		"message": "A11y: Abstract role 'command' is forbidden",
+		"message": "Abstract role 'command' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 1
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 21,
 			"line": 2
 		},
-		"message": "A11y: Abstract role 'composite' is forbidden",
+		"message": "Abstract role 'composite' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 2
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 17,
 			"line": 3
 		},
-		"message": "A11y: Abstract role 'input' is forbidden",
+		"message": "Abstract role 'input' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 3
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 20,
 			"line": 4
 		},
-		"message": "A11y: Abstract role 'landmark' is forbidden",
+		"message": "Abstract role 'landmark' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 4
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 17,
 			"line": 5
 		},
-		"message": "A11y: Abstract role 'range' is forbidden",
+		"message": "Abstract role 'range' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 5
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 20,
 			"line": 6
 		},
-		"message": "A11y: Abstract role 'roletype' is forbidden",
+		"message": "Abstract role 'roletype' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 6
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 19,
 			"line": 7
 		},
-		"message": "A11y: Abstract role 'section' is forbidden",
+		"message": "Abstract role 'section' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 7
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 23,
 			"line": 8
 		},
-		"message": "A11y: Abstract role 'sectionhead' is forbidden",
+		"message": "Abstract role 'sectionhead' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 8
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 18,
 			"line": 9
 		},
-		"message": "A11y: Abstract role 'select' is forbidden",
+		"message": "Abstract role 'select' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 9
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 21,
 			"line": 10
 		},
-		"message": "A11y: Abstract role 'structure' is forbidden",
+		"message": "Abstract role 'structure' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 10
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 18,
 			"line": 11
 		},
-		"message": "A11y: Abstract role 'widget' is forbidden",
+		"message": "Abstract role 'widget' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 11
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 18,
 			"line": 12
 		},
-		"message": "A11y: Abstract role 'window' is forbidden",
+		"message": "Abstract role 'window' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 12
diff --git a/packages/svelte/tests/validator/samples/a11y-no-access-key/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-access-key/warnings.json
index 9e1226933b..fcbe3e9d26 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-access-key/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-access-key/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-accesskey",
-		"message": "A11y: Avoid using accesskey",
+		"code": "a11y_accesskey",
+		"message": "Avoid using accesskey",
 		"start": {
 			"line": 1,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-no-autofocus/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-autofocus/warnings.json
index 0b002be48e..4ed8462a70 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-autofocus/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-autofocus/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-autofocus",
-		"message": "A11y: Avoid using autofocus",
+		"code": "a11y_autofocus",
+		"message": "Avoid using autofocus",
 		"start": {
 			"line": 1,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-no-distracting-elements/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-distracting-elements/warnings.json
index f2ba85fac0..1c4e362ec1 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-distracting-elements/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-distracting-elements/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-distracting-elements",
-		"message": "A11y: Avoid <marquee> elements",
+		"code": "a11y_distracting_elements",
+		"message": "Avoid <marquee> elements",
 		"start": {
 			"line": 1,
 			"column": 0
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-distracting-elements",
-		"message": "A11y: Avoid <blink> elements",
+		"code": "a11y_distracting_elements",
+		"message": "Avoid <blink> elements",
 		"start": {
 			"line": 2,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-no-interactive-element-to-noninteractive-role/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-interactive-element-to-noninteractive-role/warnings.json
index 1f2f8eb991..2cdbde0b9a 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-interactive-element-to-noninteractive-role/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-interactive-element-to-noninteractive-role/warnings.json
@@ -1,707 +1,707 @@
 [
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 38,
 			"line": 2
 		},
-		"message": "A11y: <a> cannot have role 'article'",
+		"message": "<a> cannot have role 'article'",
 		"start": {
 			"column": 0,
 			"line": 2
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 37,
 			"line": 3
 		},
-		"message": "A11y: <a> cannot have role 'banner'",
+		"message": "<a> cannot have role 'banner'",
 		"start": {
 			"column": 0,
 			"line": 3
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 44,
 			"line": 4
 		},
-		"message": "A11y: <a> cannot have role 'complementary'",
+		"message": "<a> cannot have role 'complementary'",
 		"start": {
 			"column": 0,
 			"line": 4
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 34,
 			"line": 5
 		},
-		"message": "A11y: <a> cannot have role 'img'",
+		"message": "<a> cannot have role 'img'",
 		"start": {
 			"column": 0,
 			"line": 5
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 39,
 			"line": 6
 		},
-		"message": "A11y: <a> cannot have role 'listitem'",
+		"message": "<a> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 6
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 35,
 			"line": 7
 		},
-		"message": "A11y: <a> cannot have role 'main'",
+		"message": "<a> cannot have role 'main'",
 		"start": {
 			"column": 0,
 			"line": 7
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 37,
 			"line": 8
 		},
-		"message": "A11y: <a> cannot have role 'region'",
+		"message": "<a> cannot have role 'region'",
 		"start": {
 			"column": 0,
 			"line": 8
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 38,
 			"line": 9
 		},
-		"message": "A11y: <a> cannot have role 'tooltip'",
+		"message": "<a> cannot have role 'tooltip'",
 		"start": {
 			"column": 0,
 			"line": 9
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 38,
 			"line": 13
 		},
-		"message": "A11y: <button> cannot have role 'article'",
+		"message": "<button> cannot have role 'article'",
 		"start": {
 			"column": 0,
 			"line": 13
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 37,
 			"line": 14
 		},
-		"message": "A11y: <button> cannot have role 'banner'",
+		"message": "<button> cannot have role 'banner'",
 		"start": {
 			"column": 0,
 			"line": 14
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 44,
 			"line": 15
 		},
-		"message": "A11y: <button> cannot have role 'complementary'",
+		"message": "<button> cannot have role 'complementary'",
 		"start": {
 			"column": 0,
 			"line": 15
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 34,
 			"line": 16
 		},
-		"message": "A11y: <button> cannot have role 'img'",
+		"message": "<button> cannot have role 'img'",
 		"start": {
 			"column": 0,
 			"line": 16
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 39,
 			"line": 17
 		},
-		"message": "A11y: <button> cannot have role 'listitem'",
+		"message": "<button> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 17
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 35,
 			"line": 18
 		},
-		"message": "A11y: <button> cannot have role 'main'",
+		"message": "<button> cannot have role 'main'",
 		"start": {
 			"column": 0,
 			"line": 18
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 37,
 			"line": 19
 		},
-		"message": "A11y: <button> cannot have role 'region'",
+		"message": "<button> cannot have role 'region'",
 		"start": {
 			"column": 0,
 			"line": 19
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 38,
 			"line": 20
 		},
-		"message": "A11y: <button> cannot have role 'tooltip'",
+		"message": "<button> cannot have role 'tooltip'",
 		"start": {
 			"column": 0,
 			"line": 20
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 21
 		},
-		"message": "A11y: Redundant role 'button'",
+		"message": "Redundant role 'button'",
 		"start": {
 			"column": 8,
 			"line": 21
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 24,
 			"line": 24
 		},
-		"message": "A11y: <input> cannot have role 'article'",
+		"message": "<input> cannot have role 'article'",
 		"start": {
 			"column": 0,
 			"line": 24
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 23,
 			"line": 25
 		},
-		"message": "A11y: <input> cannot have role 'banner'",
+		"message": "<input> cannot have role 'banner'",
 		"start": {
 			"column": 0,
 			"line": 25
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 30,
 			"line": 26
 		},
-		"message": "A11y: <input> cannot have role 'complementary'",
+		"message": "<input> cannot have role 'complementary'",
 		"start": {
 			"column": 0,
 			"line": 26
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 20,
 			"line": 27
 		},
-		"message": "A11y: <input> cannot have role 'img'",
+		"message": "<input> cannot have role 'img'",
 		"start": {
 			"column": 0,
 			"line": 27
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 25,
 			"line": 28
 		},
-		"message": "A11y: <input> cannot have role 'listitem'",
+		"message": "<input> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 28
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 21,
 			"line": 29
 		},
-		"message": "A11y: <input> cannot have role 'main'",
+		"message": "<input> cannot have role 'main'",
 		"start": {
 			"column": 0,
 			"line": 29
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 23,
 			"line": 30
 		},
-		"message": "A11y: <input> cannot have role 'region'",
+		"message": "<input> cannot have role 'region'",
 		"start": {
 			"column": 0,
 			"line": 30
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 24,
 			"line": 31
 		},
-		"message": "A11y: <input> cannot have role 'tooltip'",
+		"message": "<input> cannot have role 'tooltip'",
 		"start": {
 			"column": 0,
 			"line": 31
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 32,
 			"line": 35
 		},
-		"message": "A11y: <select> cannot have role 'article'",
+		"message": "<select> cannot have role 'article'",
 		"start": {
 			"column": 0,
 			"line": 35
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 31,
 			"line": 36
 		},
-		"message": "A11y: <select> cannot have role 'banner'",
+		"message": "<select> cannot have role 'banner'",
 		"start": {
 			"column": 0,
 			"line": 36
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 38,
 			"line": 37
 		},
-		"message": "A11y: <select> cannot have role 'complementary'",
+		"message": "<select> cannot have role 'complementary'",
 		"start": {
 			"column": 0,
 			"line": 37
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 28,
 			"line": 38
 		},
-		"message": "A11y: <select> cannot have role 'img'",
+		"message": "<select> cannot have role 'img'",
 		"start": {
 			"column": 0,
 			"line": 38
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 33,
 			"line": 39
 		},
-		"message": "A11y: <select> cannot have role 'listitem'",
+		"message": "<select> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 39
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 29,
 			"line": 40
 		},
-		"message": "A11y: <select> cannot have role 'main'",
+		"message": "<select> cannot have role 'main'",
 		"start": {
 			"column": 0,
 			"line": 40
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 31,
 			"line": 41
 		},
-		"message": "A11y: <select> cannot have role 'region'",
+		"message": "<select> cannot have role 'region'",
 		"start": {
 			"column": 0,
 			"line": 41
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 32,
 			"line": 42
 		},
-		"message": "A11y: <select> cannot have role 'tooltip'",
+		"message": "<select> cannot have role 'tooltip'",
 		"start": {
 			"column": 0,
 			"line": 42
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 36,
 			"line": 46
 		},
-		"message": "A11y: <textarea> cannot have role 'article'",
+		"message": "<textarea> cannot have role 'article'",
 		"start": {
 			"column": 0,
 			"line": 46
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 35,
 			"line": 47
 		},
-		"message": "A11y: <textarea> cannot have role 'banner'",
+		"message": "<textarea> cannot have role 'banner'",
 		"start": {
 			"column": 0,
 			"line": 47
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 42,
 			"line": 48
 		},
-		"message": "A11y: <textarea> cannot have role 'complementary'",
+		"message": "<textarea> cannot have role 'complementary'",
 		"start": {
 			"column": 0,
 			"line": 48
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 32,
 			"line": 49
 		},
-		"message": "A11y: <textarea> cannot have role 'img'",
+		"message": "<textarea> cannot have role 'img'",
 		"start": {
 			"column": 0,
 			"line": 49
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 37,
 			"line": 50
 		},
-		"message": "A11y: <textarea> cannot have role 'listitem'",
+		"message": "<textarea> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 50
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 33,
 			"line": 51
 		},
-		"message": "A11y: <textarea> cannot have role 'main'",
+		"message": "<textarea> cannot have role 'main'",
 		"start": {
 			"column": 0,
 			"line": 51
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 35,
 			"line": 52
 		},
-		"message": "A11y: <textarea> cannot have role 'region'",
+		"message": "<textarea> cannot have role 'region'",
 		"start": {
 			"column": 0,
 			"line": 52
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 36,
 			"line": 53
 		},
-		"message": "A11y: <textarea> cannot have role 'tooltip'",
+		"message": "<textarea> cannot have role 'tooltip'",
 		"start": {
 			"column": 0,
 			"line": 53
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 19,
 			"line": 57
 		},
-		"message": "A11y: Abstract role 'command' is forbidden",
+		"message": "Abstract role 'command' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 57
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 21,
 			"line": 58
 		},
-		"message": "A11y: Abstract role 'composite' is forbidden",
+		"message": "Abstract role 'composite' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 58
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 17,
 			"line": 59
 		},
-		"message": "A11y: Abstract role 'input' is forbidden",
+		"message": "Abstract role 'input' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 59
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 20,
 			"line": 60
 		},
-		"message": "A11y: Abstract role 'landmark' is forbidden",
+		"message": "Abstract role 'landmark' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 60
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 17,
 			"line": 61
 		},
-		"message": "A11y: Abstract role 'range' is forbidden",
+		"message": "Abstract role 'range' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 61
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 20,
 			"line": 62
 		},
-		"message": "A11y: Abstract role 'roletype' is forbidden",
+		"message": "Abstract role 'roletype' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 62
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 19,
 			"line": 63
 		},
-		"message": "A11y: Abstract role 'section' is forbidden",
+		"message": "Abstract role 'section' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 63
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 23,
 			"line": 64
 		},
-		"message": "A11y: Abstract role 'sectionhead' is forbidden",
+		"message": "Abstract role 'sectionhead' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 64
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 18,
 			"line": 65
 		},
-		"message": "A11y: Abstract role 'select' is forbidden",
+		"message": "Abstract role 'select' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 65
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 21,
 			"line": 66
 		},
-		"message": "A11y: Abstract role 'structure' is forbidden",
+		"message": "Abstract role 'structure' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 66
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 18,
 			"line": 71
 		},
-		"message": "A11y: Abstract role 'widget' is forbidden",
+		"message": "Abstract role 'widget' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 71
 		}
 	},
 	{
-		"code": "a11y-no-abstract-role",
+		"code": "a11y_no_abstract_role",
 		"end": {
 			"column": 18,
 			"line": 72
 		},
-		"message": "A11y: Abstract role 'window' is forbidden",
+		"message": "Abstract role 'window' is forbidden",
 		"start": {
 			"column": 5,
 			"line": 72
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 37,
 			"line": 143
 		},
-		"message": "A11y: <menuitem> cannot have role 'listitem'",
+		"message": "<menuitem> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 143
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 45,
 			"line": 144
 		},
-		"message": "A11y: <option> cannot have role 'listitem'",
+		"message": "<option> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 144
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 45,
 			"line": 145
 		},
-		"message": "A11y: <select> cannot have role 'listitem'",
+		"message": "<select> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 145
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 49,
 			"line": 146
 		},
-		"message": "A11y: <textarea> cannot have role 'listitem'",
+		"message": "<textarea> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 146
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 25,
 			"line": 147
 		},
-		"message": "A11y: <tr> cannot have role 'listitem'",
+		"message": "<tr> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 147
 		}
 	},
 	{
-		"code": "a11y-no-interactive-element-to-noninteractive-role",
+		"code": "a11y_no_interactive_element_to_noninteractive_role",
 		"end": {
 			"column": 35,
 			"line": 148
 		},
-		"message": "A11y: <summary> cannot have role 'listitem'",
+		"message": "<summary> cannot have role 'listitem'",
 		"start": {
 			"column": 0,
 			"line": 148
diff --git a/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-interactions/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-interactions/warnings.json
index ae1f6ebb09..df22c49b9f 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-interactions/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-interactions/warnings.json
@@ -1,59 +1,59 @@
 [
 	{
-		"code": "a11y-no-noninteractive-element-interactions",
+		"code": "a11y_no_noninteractive_element_interactions",
 		"end": {
 			"column": 51,
 			"line": 10
 		},
-		"message": "A11y: Non-interactive element <div> should not be assigned mouse or keyboard event listeners.",
+		"message": "Non-interactive element <div> should not be assigned mouse or keyboard event listeners.",
 		"start": {
 			"column": 0,
 			"line": 10
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-interactions",
+		"code": "a11y_no_noninteractive_element_interactions",
 		"end": {
 			"column": 58,
 			"line": 11
 		},
-		"message": "A11y: Non-interactive element <h1> should not be assigned mouse or keyboard event listeners.",
+		"message": "Non-interactive element <h1> should not be assigned mouse or keyboard event listeners.",
 		"start": {
 			"column": 0,
 			"line": 11
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-interactions",
+		"code": "a11y_no_noninteractive_element_interactions",
 		"end": {
 			"column": 50,
 			"line": 12
 		},
-		"message": "A11y: Non-interactive element <h1> should not be assigned mouse or keyboard event listeners.",
+		"message": "Non-interactive element <h1> should not be assigned mouse or keyboard event listeners.",
 		"start": {
 			"column": 0,
 			"line": 12
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-interactions",
+		"code": "a11y_no_noninteractive_element_interactions",
 		"end": {
 			"column": 30,
 			"line": 13
 		},
-		"message": "A11y: Non-interactive element <p> should not be assigned mouse or keyboard event listeners.",
+		"message": "Non-interactive element <p> should not be assigned mouse or keyboard event listeners.",
 		"start": {
 			"column": 0,
 			"line": 13
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-interactions",
+		"code": "a11y_no_noninteractive_element_interactions",
 		"end": {
 			"column": 50,
 			"line": 14
 		},
-		"message": "A11y: Non-interactive element <div> should not be assigned mouse or keyboard event listeners.",
+		"message": "Non-interactive element <div> should not be assigned mouse or keyboard event listeners.",
 		"start": {
 			"column": 0,
 			"line": 14
diff --git a/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-to-interactive-role/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-to-interactive-role/warnings.json
index 4dea7346b0..57eb3d9028 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-to-interactive-role/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-noninteractive-element-to-interactive-role/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <article> cannot have interactive role 'button'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <article> cannot have interactive role 'button'",
 		"start": {
 			"line": 2,
 			"column": 0
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <aside> cannot have interactive role 'checkbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <aside> cannot have interactive role 'checkbox'",
 		"start": {
 			"line": 3,
 			"column": 0
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <blockquote> cannot have interactive role 'columnheader'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <blockquote> cannot have interactive role 'columnheader'",
 		"start": {
 			"line": 4,
 			"column": 0
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <br> cannot have interactive role 'grid'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <br> cannot have interactive role 'grid'",
 		"start": {
 			"line": 5,
 			"column": 0
@@ -48,8 +48,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <caption> cannot have interactive role 'gridcell'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <caption> cannot have interactive role 'gridcell'",
 		"start": {
 			"line": 6,
 			"column": 0
@@ -60,8 +60,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <dd> cannot have interactive role 'link'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <dd> cannot have interactive role 'link'",
 		"start": {
 			"line": 7,
 			"column": 0
@@ -72,8 +72,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <details> cannot have interactive role 'listbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <details> cannot have interactive role 'listbox'",
 		"start": {
 			"line": 8,
 			"column": 0
@@ -84,8 +84,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <dir> cannot have interactive role 'menu'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <dir> cannot have interactive role 'menu'",
 		"start": {
 			"line": 9,
 			"column": 0
@@ -96,8 +96,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <dl> cannot have interactive role 'menubar'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <dl> cannot have interactive role 'menubar'",
 		"start": {
 			"line": 10,
 			"column": 0
@@ -108,8 +108,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <dfn> cannot have interactive role 'menuitem'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <dfn> cannot have interactive role 'menuitem'",
 		"start": {
 			"line": 11,
 			"column": 0
@@ -120,8 +120,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <dt> cannot have interactive role 'menuitemcheckbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <dt> cannot have interactive role 'menuitemcheckbox'",
 		"start": {
 			"line": 12,
 			"column": 0
@@ -132,8 +132,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <fieldset> cannot have interactive role 'menuitemradio'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <fieldset> cannot have interactive role 'menuitemradio'",
 		"start": {
 			"line": 13,
 			"column": 0
@@ -144,8 +144,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <figcaption> cannot have interactive role 'menuitemradio'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <figcaption> cannot have interactive role 'menuitemradio'",
 		"start": {
 			"line": 15,
 			"column": 1
@@ -156,8 +156,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <figure> cannot have interactive role 'option'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <figure> cannot have interactive role 'option'",
 		"start": {
 			"line": 17,
 			"column": 0
@@ -168,8 +168,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <footer> cannot have interactive role 'radio'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <footer> cannot have interactive role 'radio'",
 		"start": {
 			"line": 18,
 			"column": 0
@@ -180,8 +180,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <form> cannot have interactive role 'radiogroup'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <form> cannot have interactive role 'radiogroup'",
 		"start": {
 			"line": 19,
 			"column": 0
@@ -192,8 +192,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <h1> cannot have interactive role 'rowheader'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <h1> cannot have interactive role 'rowheader'",
 		"start": {
 			"line": 20,
 			"column": 0
@@ -204,8 +204,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <h2> cannot have interactive role 'scrollbar'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <h2> cannot have interactive role 'scrollbar'",
 		"start": {
 			"line": 21,
 			"column": 0
@@ -216,8 +216,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <h3> cannot have interactive role 'searchbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <h3> cannot have interactive role 'searchbox'",
 		"start": {
 			"line": 22,
 			"column": 0
@@ -228,8 +228,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <h4> cannot have interactive role 'slider'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <h4> cannot have interactive role 'slider'",
 		"start": {
 			"line": 23,
 			"column": 0
@@ -240,8 +240,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <h5> cannot have interactive role 'spinbutton'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <h5> cannot have interactive role 'spinbutton'",
 		"start": {
 			"line": 24,
 			"column": 0
@@ -252,8 +252,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <h6> cannot have interactive role 'switch'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <h6> cannot have interactive role 'switch'",
 		"start": {
 			"line": 25,
 			"column": 0
@@ -264,8 +264,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <hr> cannot have interactive role 'tab'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <hr> cannot have interactive role 'tab'",
 		"start": {
 			"line": 26,
 			"column": 0
@@ -276,8 +276,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <img> cannot have interactive role 'tabpanel'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <img> cannot have interactive role 'tabpanel'",
 		"start": {
 			"line": 27,
 			"column": 0
@@ -288,8 +288,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <label> cannot have interactive role 'textbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <label> cannot have interactive role 'textbox'",
 		"start": {
 			"line": 28,
 			"column": 0
@@ -300,8 +300,8 @@
 		}
 	},
 	{
-		"code": "a11y-label-has-associated-control",
-		"message": "A11y: A form label must be associated with a control.",
+		"code": "a11y_label_has_associated_control",
+		"message": "A form label must be associated with a control.",
 		"start": {
 			"line": 28,
 			"column": 0
@@ -312,8 +312,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <legend> cannot have interactive role 'toolbar'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <legend> cannot have interactive role 'toolbar'",
 		"start": {
 			"line": 29,
 			"column": 0
@@ -324,8 +324,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <li> cannot have interactive role 'tree'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <li> cannot have interactive role 'tree'",
 		"start": {
 			"line": 30,
 			"column": 0
@@ -336,8 +336,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <main> cannot have interactive role 'treegrid'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <main> cannot have interactive role 'treegrid'",
 		"start": {
 			"line": 31,
 			"column": 0
@@ -348,8 +348,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <mark> cannot have interactive role 'treeitem'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <mark> cannot have interactive role 'treeitem'",
 		"start": {
 			"line": 32,
 			"column": 0
@@ -360,8 +360,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <marquee> cannot have interactive role 'doc-backlink'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <marquee> cannot have interactive role 'doc-backlink'",
 		"start": {
 			"line": 33,
 			"column": 0
@@ -372,8 +372,8 @@
 		}
 	},
 	{
-		"code": "a11y-distracting-elements",
-		"message": "A11y: Avoid <marquee> elements",
+		"code": "a11y_distracting_elements",
+		"message": "Avoid <marquee> elements",
 		"start": {
 			"line": 33,
 			"column": 0
@@ -384,8 +384,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <menu> cannot have interactive role 'doc-biblioref'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <menu> cannot have interactive role 'doc-biblioref'",
 		"start": {
 			"line": 34,
 			"column": 0
@@ -396,8 +396,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <meter> cannot have interactive role 'doc-glossref'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <meter> cannot have interactive role 'doc-glossref'",
 		"start": {
 			"line": 35,
 			"column": 0
@@ -408,8 +408,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <nav> cannot have interactive role 'doc-noteref'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <nav> cannot have interactive role 'doc-noteref'",
 		"start": {
 			"line": 36,
 			"column": 0
@@ -420,8 +420,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <ol> cannot have interactive role 'button'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <ol> cannot have interactive role 'button'",
 		"start": {
 			"line": 37,
 			"column": 0
@@ -432,8 +432,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <optgroup> cannot have interactive role 'treeitem'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <optgroup> cannot have interactive role 'treeitem'",
 		"start": {
 			"line": 38,
 			"column": 0
@@ -444,8 +444,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <output> cannot have interactive role 'treegrid'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <output> cannot have interactive role 'treegrid'",
 		"start": {
 			"line": 39,
 			"column": 0
@@ -456,8 +456,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <p> cannot have interactive role 'columnheader'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <p> cannot have interactive role 'columnheader'",
 		"start": {
 			"line": 40,
 			"column": 0
@@ -468,8 +468,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <pre> cannot have interactive role 'tree'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <pre> cannot have interactive role 'tree'",
 		"start": {
 			"line": 41,
 			"column": 0
@@ -480,8 +480,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <progress> cannot have interactive role 'combobox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <progress> cannot have interactive role 'combobox'",
 		"start": {
 			"line": 42,
 			"column": 0
@@ -492,8 +492,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <ruby> cannot have interactive role 'toolbar'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <ruby> cannot have interactive role 'toolbar'",
 		"start": {
 			"line": 43,
 			"column": 0
@@ -504,8 +504,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <section> cannot have interactive role 'radio'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <section> cannot have interactive role 'radio'",
 		"start": {
 			"line": 44,
 			"column": 0
@@ -516,8 +516,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <table> cannot have interactive role 'menu'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <table> cannot have interactive role 'menu'",
 		"start": {
 			"line": 45,
 			"column": 0
@@ -528,8 +528,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <tbody> cannot have interactive role 'searchbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <tbody> cannot have interactive role 'searchbox'",
 		"start": {
 			"line": 46,
 			"column": 0
@@ -540,8 +540,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <tfoot> cannot have interactive role 'listbox'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <tfoot> cannot have interactive role 'listbox'",
 		"start": {
 			"line": 47,
 			"column": 0
@@ -552,8 +552,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <thead> cannot have interactive role 'slider'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <thead> cannot have interactive role 'slider'",
 		"start": {
 			"line": 48,
 			"column": 0
@@ -564,8 +564,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <time> cannot have interactive role 'doc-backlink'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <time> cannot have interactive role 'doc-backlink'",
 		"start": {
 			"line": 49,
 			"column": 0
@@ -576,8 +576,8 @@
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-element-to-interactive-role",
-		"message": "A11y: Non-interactive element <ul> cannot have interactive role 'spinbutton'",
+		"code": "a11y_no_noninteractive_element_to_interactive_role",
+		"message": "Non-interactive element <ul> cannot have interactive role 'spinbutton'",
 		"start": {
 			"line": 50,
 			"column": 0
diff --git a/packages/svelte/tests/validator/samples/a11y-no-noninteractive-tabindex/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-noninteractive-tabindex/warnings.json
index 14c48b00b2..1852376a76 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-noninteractive-tabindex/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-noninteractive-tabindex/warnings.json
@@ -1,47 +1,47 @@
 [
 	{
-		"code": "a11y-no-noninteractive-tabindex",
+		"code": "a11y_no_noninteractive_tabindex",
 		"end": {
 			"column": 24,
 			"line": 13
 		},
-		"message": "A11y: noninteractive element cannot have nonnegative tabIndex value",
+		"message": "noninteractive element cannot have nonnegative tabIndex value",
 		"start": {
 			"column": 0,
 			"line": 13
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-tabindex",
+		"code": "a11y_no_noninteractive_tabindex",
 		"end": {
 			"column": 39,
 			"line": 14
 		},
-		"message": "A11y: noninteractive element cannot have nonnegative tabIndex value",
+		"message": "noninteractive element cannot have nonnegative tabIndex value",
 		"start": {
 			"column": 0,
 			"line": 14
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-tabindex",
+		"code": "a11y_no_noninteractive_tabindex",
 		"end": {
 			"column": 32,
 			"line": 15
 		},
-		"message": "A11y: noninteractive element cannot have nonnegative tabIndex value",
+		"message": "noninteractive element cannot have nonnegative tabIndex value",
 		"start": {
 			"column": 0,
 			"line": 15
 		}
 	},
 	{
-		"code": "a11y-no-noninteractive-tabindex",
+		"code": "a11y_no_noninteractive_tabindex",
 		"end": {
 			"column": 34,
 			"line": 16
 		},
-		"message": "A11y: noninteractive element cannot have nonnegative tabIndex value",
+		"message": "noninteractive element cannot have nonnegative tabIndex value",
 		"start": {
 			"column": 0,
 			"line": 16
diff --git a/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/input.svelte b/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/input.svelte
index d43f7322c0..8b6da3b8c8 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/input.svelte
+++ b/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/input.svelte
@@ -44,5 +44,5 @@
 <footer role="contentinfo"></footer>
 
 <!-- Allowed -->
-<!-- svelte-ignore a11y-no-noninteractive-element-to-interactive-role -->
+<!-- svelte-ignore a11y_no_noninteractive_element_to_interactive_role -->
 <menu role="menu"></menu>
diff --git a/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/warnings.json
index 12cdc6f8d5..861f000aef 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-redundant-roles/warnings.json
@@ -1,467 +1,467 @@
 [
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 23,
 			"line": 1
 		},
-		"message": "A11y: Redundant role 'link'",
+		"message": "Redundant role 'link'",
 		"start": {
 			"column": 12,
 			"line": 1
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 23,
 			"line": 2
 		},
-		"message": "A11y: Redundant role 'article'",
+		"message": "Redundant role 'article'",
 		"start": {
 			"column": 9,
 			"line": 2
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 27,
 			"line": 3
 		},
-		"message": "A11y: Redundant role 'complementary'",
+		"message": "Redundant role 'complementary'",
 		"start": {
 			"column": 7,
 			"line": 3
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 4
 		},
-		"message": "A11y: Redundant role 'document'",
+		"message": "Redundant role 'document'",
 		"start": {
 			"column": 6,
 			"line": 4
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 5
 		},
-		"message": "A11y: Redundant role 'button'",
+		"message": "Redundant role 'button'",
 		"start": {
 			"column": 8,
 			"line": 5
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 24,
 			"line": 6
 		},
-		"message": "A11y: Redundant role 'listbox'",
+		"message": "Redundant role 'listbox'",
 		"start": {
 			"column": 10,
 			"line": 6
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 7
 		},
-		"message": "A11y: Redundant role 'definition'",
+		"message": "Redundant role 'definition'",
 		"start": {
 			"column": 4,
 			"line": 7
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 16,
 			"line": 8
 		},
-		"message": "A11y: Redundant role 'term'",
+		"message": "Redundant role 'term'",
 		"start": {
 			"column": 5,
 			"line": 8
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 9
 		},
-		"message": "A11y: Redundant role 'group'",
+		"message": "Redundant role 'group'",
 		"start": {
 			"column": 9,
 			"line": 9
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 10
 		},
-		"message": "A11y: Redundant role 'dialog'",
+		"message": "Redundant role 'dialog'",
 		"start": {
 			"column": 8,
 			"line": 10
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 15,
 			"line": 11
 		},
-		"message": "A11y: Redundant role 'term'",
+		"message": "Redundant role 'term'",
 		"start": {
 			"column": 4,
 			"line": 11
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 12
 		},
-		"message": "A11y: Redundant role 'group'",
+		"message": "Redundant role 'group'",
 		"start": {
 			"column": 10,
 			"line": 12
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 13
 		},
-		"message": "A11y: Redundant role 'figure'",
+		"message": "Redundant role 'figure'",
 		"start": {
 			"column": 8,
 			"line": 13
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 17,
 			"line": 14
 		},
-		"message": "A11y: Redundant role 'form'",
+		"message": "Redundant role 'form'",
 		"start": {
 			"column": 6,
 			"line": 14
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 18,
 			"line": 15
 		},
-		"message": "A11y: Redundant role 'heading'",
+		"message": "Redundant role 'heading'",
 		"start": {
 			"column": 4,
 			"line": 15
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 18,
 			"line": 16
 		},
-		"message": "A11y: Redundant role 'heading'",
+		"message": "Redundant role 'heading'",
 		"start": {
 			"column": 4,
 			"line": 16
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 18,
 			"line": 17
 		},
-		"message": "A11y: Redundant role 'heading'",
+		"message": "Redundant role 'heading'",
 		"start": {
 			"column": 4,
 			"line": 17
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 18,
 			"line": 18
 		},
-		"message": "A11y: Redundant role 'heading'",
+		"message": "Redundant role 'heading'",
 		"start": {
 			"column": 4,
 			"line": 18
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 18,
 			"line": 19
 		},
-		"message": "A11y: Redundant role 'heading'",
+		"message": "Redundant role 'heading'",
 		"start": {
 			"column": 4,
 			"line": 19
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 18,
 			"line": 20
 		},
-		"message": "A11y: Redundant role 'heading'",
+		"message": "Redundant role 'heading'",
 		"start": {
 			"column": 4,
 			"line": 20
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 20,
 			"line": 21
 		},
-		"message": "A11y: Redundant role 'separator'",
+		"message": "Redundant role 'separator'",
 		"start": {
 			"column": 4,
 			"line": 21
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 17,
 			"line": 23
 		},
-		"message": "A11y: Redundant role 'link'",
+		"message": "Redundant role 'link'",
 		"start": {
 			"column": 6,
 			"line": 23
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 17,
 			"line": 24
 		},
-		"message": "A11y: Redundant role 'main'",
+		"message": "Redundant role 'main'",
 		"start": {
 			"column": 6,
 			"line": 24
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 17,
 			"line": 25
 		},
-		"message": "A11y: Redundant role 'list'",
+		"message": "Redundant role 'list'",
 		"start": {
 			"column": 6,
 			"line": 25
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 26
 		},
-		"message": "A11y: Redundant role 'navigation'",
+		"message": "Redundant role 'navigation'",
 		"start": {
 			"column": 5,
 			"line": 26
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 28
 		},
-		"message": "A11y: Redundant role 'group'",
+		"message": "Redundant role 'group'",
 		"start": {
 			"column": 10,
 			"line": 28
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 29
 		},
-		"message": "A11y: Redundant role 'option'",
+		"message": "Redundant role 'option'",
 		"start": {
 			"column": 8,
 			"line": 29
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 30
 		},
-		"message": "A11y: Redundant role 'status'",
+		"message": "Redundant role 'status'",
 		"start": {
 			"column": 8,
 			"line": 30
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 28,
 			"line": 31
 		},
-		"message": "A11y: Redundant role 'progressbar'",
+		"message": "Redundant role 'progressbar'",
 		"start": {
 			"column": 10,
 			"line": 31
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 32
 		},
-		"message": "A11y: Redundant role 'region'",
+		"message": "Redundant role 'region'",
 		"start": {
 			"column": 9,
 			"line": 32
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 33
 		},
-		"message": "A11y: Redundant role 'button'",
+		"message": "Redundant role 'button'",
 		"start": {
 			"column": 9,
 			"line": 33
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 19,
 			"line": 34
 		},
-		"message": "A11y: Redundant role 'table'",
+		"message": "Redundant role 'table'",
 		"start": {
 			"column": 7,
 			"line": 34
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 35
 		},
-		"message": "A11y: Redundant role 'rowgroup'",
+		"message": "Redundant role 'rowgroup'",
 		"start": {
 			"column": 7,
 			"line": 35
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 24,
 			"line": 36
 		},
-		"message": "A11y: Redundant role 'textbox'",
+		"message": "Redundant role 'textbox'",
 		"start": {
 			"column": 10,
 			"line": 36
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 37
 		},
-		"message": "A11y: Redundant role 'rowgroup'",
+		"message": "Redundant role 'rowgroup'",
 		"start": {
 			"column": 7,
 			"line": 37
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 22,
 			"line": 38
 		},
-		"message": "A11y: Redundant role 'rowgroup'",
+		"message": "Redundant role 'rowgroup'",
 		"start": {
 			"column": 7,
 			"line": 38
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 14,
 			"line": 39
 		},
-		"message": "A11y: Redundant role 'row'",
+		"message": "Redundant role 'row'",
 		"start": {
 			"column": 4,
 			"line": 39
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 21,
 			"line": 43
 		},
-		"message": "A11y: Redundant role 'banner'",
+		"message": "Redundant role 'banner'",
 		"start": {
 			"column": 8,
 			"line": 43
 		}
 	},
 	{
-		"code": "a11y-no-redundant-roles",
+		"code": "a11y_no_redundant_roles",
 		"end": {
 			"column": 26,
 			"line": 44
 		},
-		"message": "A11y: Redundant role 'contentinfo'",
+		"message": "Redundant role 'contentinfo'",
 		"start": {
 			"column": 8,
 			"line": 44
diff --git a/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/input.svelte b/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/input.svelte
index f232f6b0fe..44d8b8beb1 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/input.svelte
+++ b/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/input.svelte
@@ -4,16 +4,16 @@
 
 <!-- valid -->
 <button on:click={() => {}}></button>
-<!-- svelte-ignore a11y-interactive-supports-focus -->
+<!-- svelte-ignore a11y_interactive_supports_focus -->
 <div on:keydown={() => {}} role="button"></div>
 <input type="text" on:click={() => {}} />
 <div on:copy={() => {}}></div>
 <a href="/foo" on:click={() => {}}>link</a>
 <div role={dynamicRole} on:click={() => {}}></div>
-<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
 <footer on:keydown={() => {}}></footer>
 
 <!-- invalid -->
 <div on:keydown={() => {}}></div>
-<!-- svelte-ignore a11y-missing-attribute -->
+<!-- svelte-ignore a11y_missing_attribute -->
 <a on:mousedown={() => {}} on:mouseup={() => {}} on:copy={() => {}}>link</a>
diff --git a/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/warnings.json b/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/warnings.json
index f8b982a177..93602ff618 100644
--- a/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-no-static-element-interactions/warnings.json
@@ -1,23 +1,23 @@
 [
 	{
-		"code": "a11y-no-static-element-interactions",
+		"code": "a11y_no_static_element_interactions",
 		"end": {
 			"column": 33,
 			"line": 17
 		},
-		"message": "A11y: <div> with keydown handler must have an ARIA role",
+		"message": "<div> with a keydown handler must have an ARIA role",
 		"start": {
 			"column": 0,
 			"line": 17
 		}
 	},
 	{
-		"code": "a11y-no-static-element-interactions",
+		"code": "a11y_no_static_element_interactions",
 		"end": {
 			"column": 76,
 			"line": 19
 		},
-		"message": "A11y: <a> with mousedown, mouseup handlers must have an ARIA role",
+		"message": "<a> with a mousedown or mouseup handler must have an ARIA role",
 		"start": {
 			"column": 0,
 			"line": 19
diff --git a/packages/svelte/tests/validator/samples/a11y-not-on-components/warnings.json b/packages/svelte/tests/validator/samples/a11y-not-on-components/warnings.json
index d79141b22f..07ebb73776 100644
--- a/packages/svelte/tests/validator/samples/a11y-not-on-components/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-not-on-components/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-autofocus",
-		"message": "A11y: Avoid using autofocus",
+		"code": "a11y_autofocus",
+		"message": "Avoid using autofocus",
 		"start": {
 			"column": 8,
 			"line": 6
diff --git a/packages/svelte/tests/validator/samples/a11y-role-has-required-aria-props/warnings.json b/packages/svelte/tests/validator/samples/a11y-role-has-required-aria-props/warnings.json
index 17ecda6c1c..732187a6e2 100644
--- a/packages/svelte/tests/validator/samples/a11y-role-has-required-aria-props/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-role-has-required-aria-props/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-role-has-required-aria-props",
-		"message": "A11y: Elements with the ARIA role \"heading\" must have the following attributes defined: \"aria-level\"",
+		"code": "a11y_role_has_required_aria_props",
+		"message": "Elements with the ARIA role \"heading\" must have the following attributes defined: \"aria-level\"",
 		"start": {
 			"line": 1,
 			"column": 5
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "a11y-role-has-required-aria-props",
-		"message": "A11y: Elements with the ARIA role \"checkbox\" must have the following attributes defined: \"aria-checked\"",
+		"code": "a11y_role_has_required_aria_props",
+		"message": "Elements with the ARIA role \"checkbox\" must have the following attributes defined: \"aria-checked\"",
 		"start": {
 			"line": 2,
 			"column": 6
@@ -24,8 +24,8 @@
 		}
 	},
 	{
-		"code": "a11y-role-has-required-aria-props",
-		"message": "A11y: Elements with the ARIA role \"meter\" must have the following attributes defined: \"aria-valuenow\"",
+		"code": "a11y_role_has_required_aria_props",
+		"message": "Elements with the ARIA role \"meter\" must have the following attributes defined: \"aria-valuenow\"",
 		"start": {
 			"line": 3,
 			"column": 5
@@ -36,8 +36,8 @@
 		}
 	},
 	{
-		"code": "a11y-role-has-required-aria-props",
-		"message": "A11y: Elements with the ARIA role \"scrollbar\" must have the following attributes defined: \"aria-controls\", \"aria-valuenow\"",
+		"code": "a11y_role_has_required_aria_props",
+		"message": "Elements with the ARIA role \"scrollbar\" must have the following attributes defined: \"aria-controls\" and \"aria-valuenow\"",
 		"start": {
 			"column": 5,
 			"line": 4
diff --git a/packages/svelte/tests/validator/samples/a11y-role-supports-aria-props/warnings.json b/packages/svelte/tests/validator/samples/a11y-role-supports-aria-props/warnings.json
index 4e26ae572a..176f15711b 100644
--- a/packages/svelte/tests/validator/samples/a11y-role-supports-aria-props/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-role-supports-aria-props/warnings.json
@@ -1,2147 +1,2147 @@
 [
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 19,
 			"line": 2
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'link'. This role is implicit on the element <a>.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'link'. This role is implicit on the element <a>",
 		"start": {
 			"column": 3,
 			"line": 2
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 18,
 			"line": 3
 		},
-		"message": "A11y: The attribute 'aria-pressed' is not supported by the role 'link'. This role is implicit on the element <area>.",
+		"message": "The attribute 'aria-pressed' is not supported by the role 'link'. This role is implicit on the element <area>",
 		"start": {
 			"column": 6,
 			"line": 3
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 35,
 			"line": 4
 		},
-		"message": "A11y: The attribute 'aria-autocomplete' is not supported by the role 'article'. This role is implicit on the element <article>.",
+		"message": "The attribute 'aria-autocomplete' is not supported by the role 'article'. This role is implicit on the element <article>",
 		"start": {
 			"column": 9,
 			"line": 4
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 5
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'complementary'. This role is implicit on the element <aside>.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'complementary'. This role is implicit on the element <aside>",
 		"start": {
 			"column": 7,
 			"line": 5
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 18,
 			"line": 6
 		},
-		"message": "A11y: The attribute 'aria-invalid' is not supported by the role 'document'. This role is implicit on the element <body>.",
+		"message": "The attribute 'aria-invalid' is not supported by the role 'document'. This role is implicit on the element <body>",
 		"start": {
 			"column": 6,
 			"line": 6
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 25,
 			"line": 7
 		},
-		"message": "A11y: The attribute 'aria-valuemax' is not supported by the role 'button'. This role is implicit on the element <button>.",
+		"message": "The attribute 'aria-valuemax' is not supported by the role 'button'. This role is implicit on the element <button>",
 		"start": {
 			"column": 8,
 			"line": 7
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 27,
 			"line": 8
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'listbox'. This role is implicit on the element <datalist>.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'listbox'. This role is implicit on the element <datalist>",
 		"start": {
 			"column": 10,
 			"line": 8
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 21,
 			"line": 9
 		},
-		"message": "A11y: The attribute 'aria-rowindex' is not supported by the role 'definition'. This role is implicit on the element <dd>.",
+		"message": "The attribute 'aria-rowindex' is not supported by the role 'definition'. This role is implicit on the element <dd>",
 		"start": {
 			"column": 4,
 			"line": 9
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 22,
 			"line": 10
 		},
-		"message": "A11y: The attribute 'aria-colcount' is not supported by the role 'term'. This role is implicit on the element <dfn>.",
+		"message": "The attribute 'aria-colcount' is not supported by the role 'term'. This role is implicit on the element <dfn>",
 		"start": {
 			"column": 5,
 			"line": 10
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 25,
 			"line": 11
 		},
-		"message": "A11y: The attribute 'aria-posinset' is not supported by the role 'dialog'. This role is implicit on the element <dialog>.",
+		"message": "The attribute 'aria-posinset' is not supported by the role 'dialog'. This role is implicit on the element <dialog>",
 		"start": {
 			"column": 8,
 			"line": 11
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 37,
 			"line": 12
 		},
-		"message": "A11y: The attribute 'aria-orientation' is not supported by the role 'group'. This role is implicit on the element <details>.",
+		"message": "The attribute 'aria-orientation' is not supported by the role 'group'. This role is implicit on the element <details>",
 		"start": {
 			"column": 9,
 			"line": 12
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 21,
 			"line": 13
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'term'. This role is implicit on the element <dt>.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'term'. This role is implicit on the element <dt>",
 		"start": {
 			"column": 4,
 			"line": 13
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 38,
 			"line": 14
 		},
-		"message": "A11y: The attribute 'aria-orientation' is not supported by the role 'group'. This role is implicit on the element <fieldset>.",
+		"message": "The attribute 'aria-orientation' is not supported by the role 'group'. This role is implicit on the element <fieldset>",
 		"start": {
 			"column": 10,
 			"line": 14
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 19,
 			"line": 15
 		},
-		"message": "A11y: The attribute 'aria-disabled' is not supported by the role 'form'. This role is implicit on the element <form>.",
+		"message": "The attribute 'aria-disabled' is not supported by the role 'form'. This role is implicit on the element <form>",
 		"start": {
 			"column": 6,
 			"line": 15
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 16
 		},
-		"message": "A11y: The attribute 'aria-selected' is not supported by the role 'heading'. This role is implicit on the element <h1>.",
+		"message": "The attribute 'aria-selected' is not supported by the role 'heading'. This role is implicit on the element <h1>",
 		"start": {
 			"column": 4,
 			"line": 16
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 17
 		},
-		"message": "A11y: The attribute 'aria-selected' is not supported by the role 'heading'. This role is implicit on the element <h2>.",
+		"message": "The attribute 'aria-selected' is not supported by the role 'heading'. This role is implicit on the element <h2>",
 		"start": {
 			"column": 4,
 			"line": 17
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 18
 		},
-		"message": "A11y: The attribute 'aria-expanded' is not supported by the role 'heading'. This role is implicit on the element <h3>.",
+		"message": "The attribute 'aria-expanded' is not supported by the role 'heading'. This role is implicit on the element <h3>",
 		"start": {
 			"column": 4,
 			"line": 18
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 21,
 			"line": 19
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'heading'. This role is implicit on the element <h4>.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'heading'. This role is implicit on the element <h4>",
 		"start": {
 			"column": 4,
 			"line": 19
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 20
 		},
-		"message": "A11y: The attribute 'aria-readonly' is not supported by the role 'heading'. This role is implicit on the element <h5>.",
+		"message": "The attribute 'aria-readonly' is not supported by the role 'heading'. This role is implicit on the element <h5>",
 		"start": {
 			"column": 4,
 			"line": 20
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 21,
 			"line": 21
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'heading'. This role is implicit on the element <h6>.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'heading'. This role is implicit on the element <h6>",
 		"start": {
 			"column": 4,
 			"line": 21
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 22
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'separator'. This role is implicit on the element <hr>.",
+		"message": "The attribute 'aria-required' is not supported by the role 'separator'. This role is implicit on the element <hr>",
 		"start": {
 			"column": 4,
 			"line": 22
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 19,
 			"line": 23
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'img'. This role is implicit on the element <img>.",
+		"message": "The attribute 'aria-level' is not supported by the role 'img'. This role is implicit on the element <img>",
 		"start": {
 			"column": 5,
 			"line": 23
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 17,
 			"line": 24
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'listitem'. This role is implicit on the element <li>.",
+		"message": "The attribute 'aria-required' is not supported by the role 'listitem'. This role is implicit on the element <li>",
 		"start": {
 			"column": 4,
 			"line": 24
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 23,
 			"line": 25
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'link'. This role is implicit on the element <link>.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'link'. This role is implicit on the element <link>",
 		"start": {
 			"column": 6,
 			"line": 25
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 23,
 			"line": 26
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'list'. This role is implicit on the element <menu>.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'list'. This role is implicit on the element <menu>",
 		"start": {
 			"column": 6,
 			"line": 26
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 23,
 			"line": 27
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'progressbar'. This role is implicit on the element <meter>.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'progressbar'. This role is implicit on the element <meter>",
 		"start": {
 			"column": 7,
 			"line": 27
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 22,
 			"line": 28
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'navigation'. This role is implicit on the element <nav>.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'navigation'. This role is implicit on the element <nav>",
 		"start": {
 			"column": 5,
 			"line": 28
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 20,
 			"line": 29
 		},
-		"message": "A11y: The attribute 'aria-sort' is not supported by the role 'list'. This role is implicit on the element <ol>.",
+		"message": "The attribute 'aria-sort' is not supported by the role 'list'. This role is implicit on the element <ol>",
 		"start": {
 			"column": 4,
 			"line": 29
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 20,
 			"line": 30
 		},
-		"message": "A11y: The attribute 'aria-invalid' is not supported by the role 'option'. This role is implicit on the element <option>.",
+		"message": "The attribute 'aria-invalid' is not supported by the role 'option'. This role is implicit on the element <option>",
 		"start": {
 			"column": 8,
 			"line": 30
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 26,
 			"line": 31
 		},
-		"message": "A11y: The attribute 'aria-sort' is not supported by the role 'group'. This role is implicit on the element <optgroup>.",
+		"message": "The attribute 'aria-sort' is not supported by the role 'group'. This role is implicit on the element <optgroup>",
 		"start": {
 			"column": 10,
 			"line": 31
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 22,
 			"line": 32
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'status'. This role is implicit on the element <output>.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'status'. This role is implicit on the element <output>",
 		"start": {
 			"column": 8,
 			"line": 32
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 27,
 			"line": 33
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'progressbar'. This role is implicit on the element <progress>.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'progressbar'. This role is implicit on the element <progress>",
 		"start": {
 			"column": 10,
 			"line": 33
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 21,
 			"line": 34
 		},
-		"message": "A11y: The attribute 'aria-invalid' is not supported by the role 'region'. This role is implicit on the element <section>.",
+		"message": "The attribute 'aria-invalid' is not supported by the role 'region'. This role is implicit on the element <section>",
 		"start": {
 			"column": 9,
 			"line": 34
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 26,
 			"line": 35
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'button'. This role is implicit on the element <summary>.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'button'. This role is implicit on the element <summary>",
 		"start": {
 			"column": 9,
 			"line": 35
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 23,
 			"line": 36
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'rowgroup'. This role is implicit on the element <tbody>.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'rowgroup'. This role is implicit on the element <tbody>",
 		"start": {
 			"column": 7,
 			"line": 36
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 27,
 			"line": 37
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'textbox'. This role is implicit on the element <textarea>.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'textbox'. This role is implicit on the element <textarea>",
 		"start": {
 			"column": 10,
 			"line": 37
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 20,
 			"line": 38
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'rowgroup'. This role is implicit on the element <tfoot>.",
+		"message": "The attribute 'aria-required' is not supported by the role 'rowgroup'. This role is implicit on the element <tfoot>",
 		"start": {
 			"column": 7,
 			"line": 38
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 24,
 			"line": 39
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'rowgroup'. This role is implicit on the element <thead>.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'rowgroup'. This role is implicit on the element <thead>",
 		"start": {
 			"column": 7,
 			"line": 39
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 16,
 			"line": 40
 		},
-		"message": "A11y: The attribute 'aria-pressed' is not supported by the role 'row'. This role is implicit on the element <tr>.",
+		"message": "The attribute 'aria-pressed' is not supported by the role 'row'. This role is implicit on the element <tr>",
 		"start": {
 			"column": 4,
 			"line": 40
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 24,
 			"line": 41
 		},
-		"message": "A11y: The attribute 'aria-multiselectable' is not supported by the role 'list'. This role is implicit on the element <ul>.",
+		"message": "The attribute 'aria-multiselectable' is not supported by the role 'list'. This role is implicit on the element <ul>",
 		"start": {
 			"column": 4,
 			"line": 41
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 43
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'alert'.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'alert'",
 		"start": {
 			"column": 18,
 			"line": 43
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 50,
 			"line": 44
 		},
-		"message": "A11y: The attribute 'aria-autocomplete' is not supported by the role 'alertdialog'.",
+		"message": "The attribute 'aria-autocomplete' is not supported by the role 'alertdialog'",
 		"start": {
 			"column": 24,
 			"line": 44
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 45
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'application'.",
+		"message": "The attribute 'aria-required' is not supported by the role 'application'",
 		"start": {
 			"column": 24,
 			"line": 45
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 46
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'article'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'article'",
 		"start": {
 			"column": 20,
 			"line": 46
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 45,
 			"line": 47
 		},
-		"message": "A11y: The attribute 'aria-autocomplete' is not supported by the role 'banner'.",
+		"message": "The attribute 'aria-autocomplete' is not supported by the role 'banner'",
 		"start": {
 			"column": 19,
 			"line": 47
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 40,
 			"line": 48
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'blockquote'.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'blockquote'",
 		"start": {
 			"column": 23,
 			"line": 48
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 35,
 			"line": 49
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'button'.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'button'",
 		"start": {
 			"column": 19,
 			"line": 49
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 50
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'caption'.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'caption'",
 		"start": {
 			"column": 20,
 			"line": 50
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 31,
 			"line": 51
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'cell'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'cell'",
 		"start": {
 			"column": 17,
 			"line": 51
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 35,
 			"line": 52
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'checkbox'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'checkbox'",
 		"start": {
 			"column": 21,
 			"line": 52
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 29,
 			"line": 53
 		},
-		"message": "A11y: The attribute 'aria-invalid' is not supported by the role 'code'.",
+		"message": "The attribute 'aria-invalid' is not supported by the role 'code'",
 		"start": {
 			"column": 17,
 			"line": 53
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 54
 		},
-		"message": "A11y: The attribute 'aria-colcount' is not supported by the role 'columnheader'.",
+		"message": "The attribute 'aria-colcount' is not supported by the role 'columnheader'",
 		"start": {
 			"column": 25,
 			"line": 54
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 55
 		},
-		"message": "A11y: The attribute 'aria-multiselectable' is not supported by the role 'combobox'.",
+		"message": "The attribute 'aria-multiselectable' is not supported by the role 'combobox'",
 		"start": {
 			"column": 21,
 			"line": 55
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 56
 		},
-		"message": "A11y: The attribute 'aria-readonly' is not supported by the role 'complementary'.",
+		"message": "The attribute 'aria-readonly' is not supported by the role 'complementary'",
 		"start": {
 			"column": 26,
 			"line": 56
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 57
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'contentinfo'.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'contentinfo'",
 		"start": {
 			"column": 24,
 			"line": 57
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 58
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'definition'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'definition'",
 		"start": {
 			"column": 23,
 			"line": 58
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 59
 		},
-		"message": "A11y: The attribute 'aria-expanded' is not supported by the role 'deletion'.",
+		"message": "The attribute 'aria-expanded' is not supported by the role 'deletion'",
 		"start": {
 			"column": 21,
 			"line": 59
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 33,
 			"line": 60
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'dialog'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'dialog'",
 		"start": {
 			"column": 19,
 			"line": 60
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 61
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'directory'.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'directory'",
 		"start": {
 			"column": 22,
 			"line": 61
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 62
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'document'.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'document'",
 		"start": {
 			"column": 21,
 			"line": 62
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 63
 		},
-		"message": "A11y: The attribute 'aria-rowindex' is not supported by the role 'emphasis'.",
+		"message": "The attribute 'aria-rowindex' is not supported by the role 'emphasis'",
 		"start": {
 			"column": 21,
 			"line": 63
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 64
 		},
-		"message": "A11y: The attribute 'aria-colindex' is not supported by the role 'feed'.",
+		"message": "The attribute 'aria-colindex' is not supported by the role 'feed'",
 		"start": {
 			"column": 17,
 			"line": 64
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 65
 		},
-		"message": "A11y: The attribute 'aria-valuemax' is not supported by the role 'figure'.",
+		"message": "The attribute 'aria-valuemax' is not supported by the role 'figure'",
 		"start": {
 			"column": 19,
 			"line": 65
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 30,
 			"line": 66
 		},
-		"message": "A11y: The attribute 'aria-readonly' is not supported by the role 'form'.",
+		"message": "The attribute 'aria-readonly' is not supported by the role 'form'",
 		"start": {
 			"column": 17,
 			"line": 66
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 67
 		},
-		"message": "A11y: The attribute 'aria-valuemax' is not supported by the role 'generic'.",
+		"message": "The attribute 'aria-valuemax' is not supported by the role 'generic'",
 		"start": {
 			"column": 20,
 			"line": 67
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 29,
 			"line": 68
 		},
-		"message": "A11y: The attribute 'aria-checked' is not supported by the role 'grid'.",
+		"message": "The attribute 'aria-checked' is not supported by the role 'grid'",
 		"start": {
 			"column": 17,
 			"line": 68
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 35,
 			"line": 69
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'gridcell'.",
+		"message": "The attribute 'aria-level' is not supported by the role 'gridcell'",
 		"start": {
 			"column": 21,
 			"line": 69
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 70
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'group'.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'group'",
 		"start": {
 			"column": 18,
 			"line": 70
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 46,
 			"line": 71
 		},
-		"message": "A11y: The attribute 'aria-activedescendant' is not supported by the role 'heading'.",
+		"message": "The attribute 'aria-activedescendant' is not supported by the role 'heading'",
 		"start": {
 			"column": 20,
 			"line": 71
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 47,
 			"line": 72
 		},
-		"message": "A11y: The attribute 'aria-errormessage' is not supported by the role 'insertion'.",
+		"message": "The attribute 'aria-errormessage' is not supported by the role 'insertion'",
 		"start": {
 			"column": 22,
 			"line": 72
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 31,
 			"line": 73
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'link'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'link'",
 		"start": {
 			"column": 17,
 			"line": 73
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 30,
 			"line": 74
 		},
-		"message": "A11y: The attribute 'aria-selected' is not supported by the role 'list'.",
+		"message": "The attribute 'aria-selected' is not supported by the role 'list'",
 		"start": {
 			"column": 17,
 			"line": 74
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 33,
 			"line": 75
 		},
-		"message": "A11y: The attribute 'aria-haspopup' is not supported by the role 'listbox'.",
+		"message": "The attribute 'aria-haspopup' is not supported by the role 'listbox'",
 		"start": {
 			"column": 20,
 			"line": 75
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 47,
 			"line": 76
 		},
-		"message": "A11y: The attribute 'aria-activedescendant' is not supported by the role 'listitem'.",
+		"message": "The attribute 'aria-activedescendant' is not supported by the role 'listitem'",
 		"start": {
 			"column": 21,
 			"line": 76
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 29,
 			"line": 77
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'log'.",
+		"message": "The attribute 'aria-required' is not supported by the role 'log'",
 		"start": {
 			"column": 16,
 			"line": 77
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 33,
 			"line": 78
 		},
-		"message": "A11y: The attribute 'aria-sort' is not supported by the role 'main'.",
+		"message": "The attribute 'aria-sort' is not supported by the role 'main'",
 		"start": {
 			"column": 17,
 			"line": 78
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 46,
 			"line": 79
 		},
-		"message": "A11y: The attribute 'aria-autocomplete' is not supported by the role 'marquee'.",
+		"message": "The attribute 'aria-autocomplete' is not supported by the role 'marquee'",
 		"start": {
 			"column": 20,
 			"line": 79
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 31,
 			"line": 80
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'math'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'math'",
 		"start": {
 			"column": 17,
 			"line": 80
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 29,
 			"line": 81
 		},
-		"message": "A11y: The attribute 'aria-checked' is not supported by the role 'menu'.",
+		"message": "The attribute 'aria-checked' is not supported by the role 'menu'",
 		"start": {
 			"column": 17,
 			"line": 81
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 45,
 			"line": 82
 		},
-		"message": "A11y: The attribute 'aria-errormessage' is not supported by the role 'menubar'.",
+		"message": "The attribute 'aria-errormessage' is not supported by the role 'menubar'",
 		"start": {
 			"column": 20,
 			"line": 82
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 33,
 			"line": 83
 		},
-		"message": "A11y: The attribute 'aria-checked' is not supported by the role 'menuitem'.",
+		"message": "The attribute 'aria-checked' is not supported by the role 'menuitem'",
 		"start": {
 			"column": 21,
 			"line": 83
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 84
 		},
-		"message": "A11y: The attribute 'aria-pressed' is not supported by the role 'menuitemcheckbox'.",
+		"message": "The attribute 'aria-pressed' is not supported by the role 'menuitemcheckbox'",
 		"start": {
 			"column": 29,
 			"line": 84
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 85
 		},
-		"message": "A11y: The attribute 'aria-rowspan' is not supported by the role 'menuitemradio'.",
+		"message": "The attribute 'aria-rowspan' is not supported by the role 'menuitemradio'",
 		"start": {
 			"column": 26,
 			"line": 85
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 49,
 			"line": 86
 		},
-		"message": "A11y: The attribute 'aria-haspopup' is not supported by the role 'meter'.",
+		"message": "The attribute 'aria-haspopup' is not supported by the role 'meter'",
 		"start": {
 			"column": 36,
 			"line": 86
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 87
 		},
-		"message": "A11y: The attribute 'aria-expanded' is not supported by the role 'navigation'.",
+		"message": "The attribute 'aria-expanded' is not supported by the role 'navigation'",
 		"start": {
 			"column": 23,
 			"line": 87
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 88
 		},
-		"message": "A11y: The attribute 'aria-placeholder' is not supported by the role 'none'.",
+		"message": "The attribute 'aria-placeholder' is not supported by the role 'none'",
 		"start": {
 			"column": 17,
 			"line": 88
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 27,
 			"line": 89
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'note'.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'note'",
 		"start": {
 			"column": 17,
 			"line": 89
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 50,
 			"line": 90
 		},
-		"message": "A11y: The attribute 'aria-valuemax' is not supported by the role 'option'.",
+		"message": "The attribute 'aria-valuemax' is not supported by the role 'option'",
 		"start": {
 			"column": 33,
 			"line": 90
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 91
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'paragraph'.",
+		"message": "The attribute 'aria-level' is not supported by the role 'paragraph'",
 		"start": {
 			"column": 22,
 			"line": 91
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 92
 		},
-		"message": "A11y: The attribute 'aria-disabled' is not supported by the role 'presentation'.",
+		"message": "The attribute 'aria-disabled' is not supported by the role 'presentation'",
 		"start": {
 			"column": 25,
 			"line": 92
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 93
 		},
-		"message": "A11y: The attribute 'aria-expanded' is not supported by the role 'progressbar'.",
+		"message": "The attribute 'aria-expanded' is not supported by the role 'progressbar'",
 		"start": {
 			"column": 24,
 			"line": 93
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 48,
 			"line": 94
 		},
-		"message": "A11y: The attribute 'aria-rowindex' is not supported by the role 'radio'.",
+		"message": "The attribute 'aria-rowindex' is not supported by the role 'radio'",
 		"start": {
 			"column": 31,
 			"line": 94
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 40,
 			"line": 95
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'radiogroup'.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'radiogroup'",
 		"start": {
 			"column": 23,
 			"line": 95
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 35,
 			"line": 96
 		},
-		"message": "A11y: The attribute 'aria-rowspan' is not supported by the role 'region'.",
+		"message": "The attribute 'aria-rowspan' is not supported by the role 'region'",
 		"start": {
 			"column": 19,
 			"line": 96
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 29,
 			"line": 97
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'row'.",
+		"message": "The attribute 'aria-required' is not supported by the role 'row'",
 		"start": {
 			"column": 16,
 			"line": 97
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 98
 		},
-		"message": "A11y: The attribute 'aria-expanded' is not supported by the role 'rowgroup'.",
+		"message": "The attribute 'aria-expanded' is not supported by the role 'rowgroup'",
 		"start": {
 			"column": 21,
 			"line": 98
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 48,
 			"line": 99
 		},
-		"message": "A11y: The attribute 'aria-activedescendant' is not supported by the role 'rowheader'.",
+		"message": "The attribute 'aria-activedescendant' is not supported by the role 'rowheader'",
 		"start": {
 			"column": 22,
 			"line": 99
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 75,
 			"line": 100
 		},
-		"message": "A11y: The attribute 'aria-rowspan' is not supported by the role 'scrollbar'.",
+		"message": "The attribute 'aria-rowspan' is not supported by the role 'scrollbar'",
 		"start": {
 			"column": 59,
 			"line": 100
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 45,
 			"line": 101
 		},
-		"message": "A11y: The attribute 'aria-autocomplete' is not supported by the role 'search'.",
+		"message": "The attribute 'aria-autocomplete' is not supported by the role 'search'",
 		"start": {
 			"column": 19,
 			"line": 101
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 102
 		},
-		"message": "A11y: The attribute 'aria-colindex' is not supported by the role 'searchbox'.",
+		"message": "The attribute 'aria-colindex' is not supported by the role 'searchbox'",
 		"start": {
 			"column": 22,
 			"line": 102
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 103
 		},
-		"message": "A11y: The attribute 'aria-sort' is not supported by the role 'separator'.",
+		"message": "The attribute 'aria-sort' is not supported by the role 'separator'",
 		"start": {
 			"column": 22,
 			"line": 103
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 56,
 			"line": 104
 		},
-		"message": "A11y: The attribute 'aria-placeholder' is not supported by the role 'slider'.",
+		"message": "The attribute 'aria-placeholder' is not supported by the role 'slider'",
 		"start": {
 			"column": 37,
 			"line": 104
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 40,
 			"line": 105
 		},
-		"message": "A11y: The attribute 'aria-posinset' is not supported by the role 'spinbutton'.",
+		"message": "The attribute 'aria-posinset' is not supported by the role 'spinbutton'",
 		"start": {
 			"column": 23,
 			"line": 105
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 106
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'status'.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'status'",
 		"start": {
 			"column": 19,
 			"line": 106
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 107
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'strong'.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'strong'",
 		"start": {
 			"column": 19,
 			"line": 107
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 108
 		},
-		"message": "A11y: The attribute 'aria-colcount' is not supported by the role 'subscript'.",
+		"message": "The attribute 'aria-colcount' is not supported by the role 'subscript'",
 		"start": {
 			"column": 22,
 			"line": 108
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 109
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'superscript'.",
+		"message": "The attribute 'aria-level' is not supported by the role 'superscript'",
 		"start": {
 			"column": 24,
 			"line": 109
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 49,
 			"line": 110
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'switch'.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'switch'",
 		"start": {
 			"column": 32,
 			"line": 110
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 29,
 			"line": 111
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'tab'.",
+		"message": "The attribute 'aria-required' is not supported by the role 'tab'",
 		"start": {
 			"column": 16,
 			"line": 111
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 28,
 			"line": 112
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'table'.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'table'",
 		"start": {
 			"column": 18,
 			"line": 112
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 113
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'tablist'.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'tablist'",
 		"start": {
 			"column": 20,
 			"line": 113
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 114
 		},
-		"message": "A11y: The attribute 'aria-multiselectable' is not supported by the role 'tabpanel'.",
+		"message": "The attribute 'aria-multiselectable' is not supported by the role 'tabpanel'",
 		"start": {
 			"column": 21,
 			"line": 114
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 115
 		},
-		"message": "A11y: The attribute 'aria-posinset' is not supported by the role 'term'.",
+		"message": "The attribute 'aria-posinset' is not supported by the role 'term'",
 		"start": {
 			"column": 17,
 			"line": 115
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 116
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'textbox'.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'textbox'",
 		"start": {
 			"column": 20,
 			"line": 116
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 30,
 			"line": 117
 		},
-		"message": "A11y: The attribute 'aria-selected' is not supported by the role 'time'.",
+		"message": "The attribute 'aria-selected' is not supported by the role 'time'",
 		"start": {
 			"column": 17,
 			"line": 117
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 118
 		},
-		"message": "A11y: The attribute 'aria-sort' is not supported by the role 'timer'.",
+		"message": "The attribute 'aria-sort' is not supported by the role 'timer'",
 		"start": {
 			"column": 18,
 			"line": 118
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 119
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'toolbar'.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'toolbar'",
 		"start": {
 			"column": 20,
 			"line": 119
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 34,
 			"line": 120
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'tooltip'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'tooltip'",
 		"start": {
 			"column": 20,
 			"line": 120
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 30,
 			"line": 121
 		},
-		"message": "A11y: The attribute 'aria-expanded' is not supported by the role 'tree'.",
+		"message": "The attribute 'aria-expanded' is not supported by the role 'tree'",
 		"start": {
 			"column": 17,
 			"line": 121
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 35,
 			"line": 122
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'treegrid'.",
+		"message": "The attribute 'aria-level' is not supported by the role 'treegrid'",
 		"start": {
 			"column": 21,
 			"line": 122
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 61,
 			"line": 123
 		},
-		"message": "A11y: The attribute 'aria-activedescendant' is not supported by the role 'treeitem'.",
+		"message": "The attribute 'aria-activedescendant' is not supported by the role 'treeitem'",
 		"start": {
 			"column": 35,
 			"line": 123
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 124
 		},
-		"message": "A11y: The attribute 'aria-colindex' is not supported by the role 'doc-abstract'.",
+		"message": "The attribute 'aria-colindex' is not supported by the role 'doc-abstract'",
 		"start": {
 			"column": 25,
 			"line": 124
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 48,
 			"line": 125
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'doc-acknowledgments'.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'doc-acknowledgments'",
 		"start": {
 			"column": 32,
 			"line": 125
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 126
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'doc-afterword'.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'doc-afterword'",
 		"start": {
 			"column": 26,
 			"line": 126
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 51,
 			"line": 127
 		},
-		"message": "A11y: The attribute 'aria-activedescendant' is not supported by the role 'doc-appendix'.",
+		"message": "The attribute 'aria-activedescendant' is not supported by the role 'doc-appendix'",
 		"start": {
 			"column": 25,
 			"line": 127
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 128
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'doc-backlink'.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'doc-backlink'",
 		"start": {
 			"column": 25,
 			"line": 128
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 45,
 			"line": 129
 		},
-		"message": "A11y: The attribute 'aria-valuemax' is not supported by the role 'doc-biblioentry'.",
+		"message": "The attribute 'aria-valuemax' is not supported by the role 'doc-biblioentry'",
 		"start": {
 			"column": 28,
 			"line": 129
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 43,
 			"line": 130
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'doc-bibliography'.",
+		"message": "The attribute 'aria-level' is not supported by the role 'doc-bibliography'",
 		"start": {
 			"column": 29,
 			"line": 130
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 131
 		},
-		"message": "A11y: The attribute 'aria-checked' is not supported by the role 'doc-biblioref'.",
+		"message": "The attribute 'aria-checked' is not supported by the role 'doc-biblioref'",
 		"start": {
 			"column": 26,
 			"line": 131
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 132
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'doc-chapter'.",
+		"message": "The attribute 'aria-required' is not supported by the role 'doc-chapter'",
 		"start": {
 			"column": 24,
 			"line": 132
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 133
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'doc-colophon'.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'doc-colophon'",
 		"start": {
 			"column": 25,
 			"line": 133
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 44,
 			"line": 134
 		},
-		"message": "A11y: The attribute 'aria-colindex' is not supported by the role 'doc-conclusion'.",
+		"message": "The attribute 'aria-colindex' is not supported by the role 'doc-conclusion'",
 		"start": {
 			"column": 27,
 			"line": 134
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 32,
 			"line": 135
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'doc-cover'.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'doc-cover'",
 		"start": {
 			"column": 22,
 			"line": 135
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 136
 		},
-		"message": "A11y: The attribute 'aria-selected' is not supported by the role 'doc-credit'.",
+		"message": "The attribute 'aria-selected' is not supported by the role 'doc-credit'",
 		"start": {
 			"column": 23,
 			"line": 136
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 52,
 			"line": 137
 		},
-		"message": "A11y: The attribute 'aria-orientation' is not supported by the role 'doc-credits'.",
+		"message": "The attribute 'aria-orientation' is not supported by the role 'doc-credits'",
 		"start": {
 			"column": 24,
 			"line": 137
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 138
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'doc-dedication'.",
+		"message": "The attribute 'aria-level' is not supported by the role 'doc-dedication'",
 		"start": {
 			"column": 27,
 			"line": 138
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 139
 		},
-		"message": "A11y: The attribute 'aria-checked' is not supported by the role 'doc-endnote'.",
+		"message": "The attribute 'aria-checked' is not supported by the role 'doc-endnote'",
 		"start": {
 			"column": 24,
 			"line": 139
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 140
 		},
-		"message": "A11y: The attribute 'aria-colcount' is not supported by the role 'doc-endnotes'.",
+		"message": "The attribute 'aria-colcount' is not supported by the role 'doc-endnotes'",
 		"start": {
 			"column": 25,
 			"line": 140
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 141
 		},
-		"message": "A11y: The attribute 'aria-multiline' is not supported by the role 'doc-epigraph'.",
+		"message": "The attribute 'aria-multiline' is not supported by the role 'doc-epigraph'",
 		"start": {
 			"column": 25,
 			"line": 141
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 142
 		},
-		"message": "A11y: The attribute 'aria-colcount' is not supported by the role 'doc-epilogue'.",
+		"message": "The attribute 'aria-colcount' is not supported by the role 'doc-epilogue'",
 		"start": {
 			"column": 25,
 			"line": 142
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 143
 		},
-		"message": "A11y: The attribute 'aria-sort' is not supported by the role 'doc-errata'.",
+		"message": "The attribute 'aria-sort' is not supported by the role 'doc-errata'",
 		"start": {
 			"column": 23,
 			"line": 143
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 44,
 			"line": 144
 		},
-		"message": "A11y: The attribute 'aria-multiselectable' is not supported by the role 'doc-example'.",
+		"message": "The attribute 'aria-multiselectable' is not supported by the role 'doc-example'",
 		"start": {
 			"column": 24,
 			"line": 144
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 145
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'doc-footnote'.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'doc-footnote'",
 		"start": {
 			"column": 25,
 			"line": 145
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 146
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'doc-foreword'.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'doc-foreword'",
 		"start": {
 			"column": 25,
 			"line": 146
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 147
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'doc-glossary'.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'doc-glossary'",
 		"start": {
 			"column": 25,
 			"line": 147
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 44,
 			"line": 148
 		},
-		"message": "A11y: The attribute 'aria-placeholder' is not supported by the role 'doc-glossref'.",
+		"message": "The attribute 'aria-placeholder' is not supported by the role 'doc-glossref'",
 		"start": {
 			"column": 25,
 			"line": 148
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 39,
 			"line": 149
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'doc-index'.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'doc-index'",
 		"start": {
 			"column": 22,
 			"line": 149
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 150
 		},
-		"message": "A11y: The attribute 'aria-pressed' is not supported by the role 'doc-introduction'.",
+		"message": "The attribute 'aria-pressed' is not supported by the role 'doc-introduction'",
 		"start": {
 			"column": 29,
 			"line": 150
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 41,
 			"line": 151
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'doc-noteref'.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'doc-noteref'",
 		"start": {
 			"column": 24,
 			"line": 151
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 152
 		},
-		"message": "A11y: The attribute 'aria-selected' is not supported by the role 'doc-notice'.",
+		"message": "The attribute 'aria-selected' is not supported by the role 'doc-notice'",
 		"start": {
 			"column": 23,
 			"line": 152
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 43,
 			"line": 153
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'doc-pagebreak'.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'doc-pagebreak'",
 		"start": {
 			"column": 26,
 			"line": 153
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 35,
 			"line": 154
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'doc-pagelist'.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'doc-pagelist'",
 		"start": {
 			"column": 25,
 			"line": 154
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 155
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'doc-part'.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'doc-part'",
 		"start": {
 			"column": 21,
 			"line": 155
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 52,
 			"line": 156
 		},
-		"message": "A11y: The attribute 'aria-orientation' is not supported by the role 'doc-preface'.",
+		"message": "The attribute 'aria-orientation' is not supported by the role 'doc-preface'",
 		"start": {
 			"column": 24,
 			"line": 156
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 38,
 			"line": 157
 		},
-		"message": "A11y: The attribute 'aria-required' is not supported by the role 'doc-prologue'.",
+		"message": "The attribute 'aria-required' is not supported by the role 'doc-prologue'",
 		"start": {
 			"column": 25,
 			"line": 157
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 43,
 			"line": 158
 		},
-		"message": "A11y: The attribute 'aria-rowcount' is not supported by the role 'doc-pullquote'.",
+		"message": "The attribute 'aria-rowcount' is not supported by the role 'doc-pullquote'",
 		"start": {
 			"column": 26,
 			"line": 158
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 36,
 			"line": 159
 		},
-		"message": "A11y: The attribute 'aria-setsize' is not supported by the role 'doc-qna'.",
+		"message": "The attribute 'aria-setsize' is not supported by the role 'doc-qna'",
 		"start": {
 			"column": 20,
 			"line": 159
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 42,
 			"line": 160
 		},
-		"message": "A11y: The attribute 'aria-rowindex' is not supported by the role 'doc-subtitle'.",
+		"message": "The attribute 'aria-rowindex' is not supported by the role 'doc-subtitle'",
 		"start": {
 			"column": 25,
 			"line": 160
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 161
 		},
-		"message": "A11y: The attribute 'aria-valuenow' is not supported by the role 'doc-tip'.",
+		"message": "The attribute 'aria-valuenow' is not supported by the role 'doc-tip'",
 		"start": {
 			"column": 20,
 			"line": 161
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props",
 		"end": {
 			"column": 37,
 			"line": 162
 		},
-		"message": "A11y: The attribute 'aria-posinset' is not supported by the role 'doc-toc'.",
+		"message": "The attribute 'aria-posinset' is not supported by the role 'doc-toc'",
 		"start": {
 			"column": 20,
 			"line": 162
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 35,
 			"line": 166
 		},
-		"message": "A11y: The attribute 'aria-rowspan' is not supported by the role 'textbox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-rowspan' is not supported by the role 'textbox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 19,
 			"line": 166
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 30,
 			"line": 167
 		},
-		"message": "A11y: The attribute 'aria-pressed' is not supported by the role 'textbox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-pressed' is not supported by the role 'textbox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 18,
 			"line": 167
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 32,
 			"line": 168
 		},
-		"message": "A11y: The attribute 'aria-level' is not supported by the role 'textbox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-level' is not supported by the role 'textbox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 18,
 			"line": 168
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 32,
 			"line": 169
 		},
-		"message": "A11y: The attribute 'aria-pressed' is not supported by the role 'textbox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-pressed' is not supported by the role 'textbox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 20,
 			"line": 169
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 42,
 			"line": 170
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'searchbox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'searchbox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 21,
 			"line": 170
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 50,
 			"line": 171
 		},
-		"message": "A11y: The attribute 'aria-valuemin' is not supported by the role 'combobox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-valuemin' is not supported by the role 'combobox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 33,
 			"line": 171
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 48,
 			"line": 172
 		},
-		"message": "A11y: The attribute 'aria-colspan' is not supported by the role 'combobox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-colspan' is not supported by the role 'combobox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 32,
 			"line": 172
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 49,
 			"line": 173
 		},
-		"message": "A11y: The attribute 'aria-posinset' is not supported by the role 'combobox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-posinset' is not supported by the role 'combobox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 32,
 			"line": 173
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 44,
 			"line": 174
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'combobox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'combobox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 34,
 			"line": 174
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 52,
 			"line": 175
 		},
-		"message": "A11y: The attribute 'aria-rowindex' is not supported by the role 'combobox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-rowindex' is not supported by the role 'combobox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 35,
 			"line": 175
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 53,
 			"line": 176
 		},
-		"message": "A11y: The attribute 'aria-valuemax' is not supported by the role 'button'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-valuemax' is not supported by the role 'button'. This role is implicit on the element <input>",
 		"start": {
 			"column": 36,
 			"line": 176
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 30,
 			"line": 177
 		},
-		"message": "A11y: The attribute 'aria-modal' is not supported by the role 'button'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-modal' is not supported by the role 'button'. This role is implicit on the element <input>",
 		"start": {
 			"column": 20,
 			"line": 177
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 51,
 			"line": 178
 		},
-		"message": "A11y: The attribute 'aria-placeholder' is not supported by the role 'button'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-placeholder' is not supported by the role 'button'. This role is implicit on the element <input>",
 		"start": {
 			"column": 21,
 			"line": 178
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 40,
 			"line": 179
 		},
-		"message": "A11y: The attribute 'aria-rowindex' is not supported by the role 'checkbox'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-rowindex' is not supported by the role 'checkbox'. This role is implicit on the element <input>",
 		"start": {
 			"column": 23,
 			"line": 179
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 41,
 			"line": 180
 		},
-		"message": "A11y: The attribute 'aria-valuetext' is not supported by the role 'radio'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-valuetext' is not supported by the role 'radio'. This role is implicit on the element <input>",
 		"start": {
 			"column": 20,
 			"line": 180
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 32,
 			"line": 181
 		},
-		"message": "A11y: The attribute 'aria-checked' is not supported by the role 'slider'. This role is implicit on the element <input>.",
+		"message": "The attribute 'aria-checked' is not supported by the role 'slider'. This role is implicit on the element <input>",
 		"start": {
 			"column": 20,
 			"line": 181
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 42,
 			"line": 182
 		},
-		"message": "A11y: The attribute 'aria-colindex' is not supported by the role 'menuitem'. This role is implicit on the element <menuitem>.",
+		"message": "The attribute 'aria-colindex' is not supported by the role 'menuitem'. This role is implicit on the element <menuitem>",
 		"start": {
 			"column": 25,
 			"line": 182
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 43,
 			"line": 183
 		},
-		"message": "A11y: The attribute 'aria-colcount' is not supported by the role 'menuitemcheckbox'. This role is implicit on the element <menuitem>.",
+		"message": "The attribute 'aria-colcount' is not supported by the role 'menuitemcheckbox'. This role is implicit on the element <menuitem>",
 		"start": {
 			"column": 26,
 			"line": 183
 		}
 	},
 	{
-		"code": "a11y-role-supports-aria-props",
+		"code": "a11y_role_supports_aria_props_implicit",
 		"end": {
 			"column": 53,
 			"line": 184
 		},
-		"message": "A11y: The attribute 'aria-placeholder' is not supported by the role 'menuitemradio'. This role is implicit on the element <menuitem>.",
+		"message": "The attribute 'aria-placeholder' is not supported by the role 'menuitemradio'. This role is implicit on the element <menuitem>",
 		"start": {
 			"column": 23,
 			"line": 184
diff --git a/packages/svelte/tests/validator/samples/a11y-scope/warnings.json b/packages/svelte/tests/validator/samples/a11y-scope/warnings.json
index b8e36cef5d..79ea2416fd 100644
--- a/packages/svelte/tests/validator/samples/a11y-scope/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-scope/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-misplaced-scope",
-		"message": "A11y: The scope attribute should only be used with <th> elements",
+		"code": "a11y_misplaced_scope",
+		"message": "The scope attribute should only be used with <th> elements",
 		"start": {
 			"line": 6,
 			"column": 5
diff --git a/packages/svelte/tests/validator/samples/a11y-tabindex-no-positive/warnings.json b/packages/svelte/tests/validator/samples/a11y-tabindex-no-positive/warnings.json
index 455c4998e4..d98b26dfd3 100644
--- a/packages/svelte/tests/validator/samples/a11y-tabindex-no-positive/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-tabindex-no-positive/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-positive-tabindex",
-		"message": "A11y: avoid tabindex values above zero",
+		"code": "a11y_positive_tabindex",
+		"message": "Avoid tabindex values above zero",
 		"start": {
 			"line": 7,
 			"column": 8
diff --git a/packages/svelte/tests/validator/samples/component-dynamic/input.svelte b/packages/svelte/tests/validator/samples/component-dynamic/input.svelte
index 241a33c5ea..7f52353e36 100644
--- a/packages/svelte/tests/validator/samples/component-dynamic/input.svelte
+++ b/packages/svelte/tests/validator/samples/component-dynamic/input.svelte
@@ -18,13 +18,13 @@
 <svelte:component this={Let} />
 
 <!-- Here, we test to see if svelte-ignore works with reactive-component -->
-<!-- svelte-ignore reactive-component -->
+<!-- svelte-ignore reactive_component -->
 <Let />
 <div>
-  <!-- svelte-ignore reactive-component -->
+  <!-- svelte-ignore reactive_component -->
   <ExportLet />
   <div>
-    <!-- svelte-ignore reactive-component -->
+    <!-- svelte-ignore reactive_component -->
     <Reactive />
   </div>
 </div>
diff --git a/packages/svelte/tests/validator/samples/component-dynamic/warnings.json b/packages/svelte/tests/validator/samples/component-dynamic/warnings.json
index 58d07677b8..49fb9e4334 100644
--- a/packages/svelte/tests/validator/samples/component-dynamic/warnings.json
+++ b/packages/svelte/tests/validator/samples/component-dynamic/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "reactive-component",
+		"code": "reactive_component",
 		"message": "<Let/> will not be reactive if Let changes. Use <svelte:component this={Let}/> if you want this reactivity.",
 		"end": {
 			"column": 7,
@@ -13,7 +13,7 @@
 	},
 	{
 		"message": "<ExportLet/> will not be reactive if ExportLet changes. Use <svelte:component this={ExportLet}/> if you want this reactivity.",
-		"code": "reactive-component",
+		"code": "reactive_component",
 		"end": {
 			"column": 13,
 			"line": 16
@@ -25,7 +25,7 @@
 	},
 	{
 		"message": "<Reactive/> will not be reactive if Reactive changes. Use <svelte:component this={Reactive}/> if you want this reactivity.",
-		"code": "reactive-component",
+		"code": "reactive_component",
 		"end": {
 			"column": 12,
 			"line": 17
diff --git a/packages/svelte/tests/validator/samples/component-name-lowercase/warnings.json b/packages/svelte/tests/validator/samples/component-name-lowercase/warnings.json
index d5ddbf1cc5..e330d53f17 100644
--- a/packages/svelte/tests/validator/samples/component-name-lowercase/warnings.json
+++ b/packages/svelte/tests/validator/samples/component-name-lowercase/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "component-name-lowercase",
+		"code": "component_name_lowercase",
 		"message": "<thisShouldWarnMe> will be treated as an HTML element unless it begins with a capital letter",
 		"start": {
 			"column": 0,
diff --git a/packages/svelte/tests/validator/samples/empty-block/warnings.json b/packages/svelte/tests/validator/samples/empty-block/warnings.json
index b86dab6f72..461a4aecc9 100644
--- a/packages/svelte/tests/validator/samples/empty-block/warnings.json
+++ b/packages/svelte/tests/validator/samples/empty-block/warnings.json
@@ -1,26 +1,50 @@
 [
 	{
-		"code": "empty-block",
+		"code": "empty_block",
 		"message": "Empty block",
-		"start": { "line": 13, "column": 23 },
-		"end": { "line": 15, "column": 0 }
+		"start": {
+			"line": 13,
+			"column": 23
+		},
+		"end": {
+			"line": 15,
+			"column": 0
+		}
 	},
 	{
-		"code": "empty-block",
+		"code": "empty_block",
 		"message": "Empty block",
-		"start": { "line": 16, "column": 10 },
-		"end": { "line": 16, "column": 11 }
+		"start": {
+			"line": 16,
+			"column": 10
+		},
+		"end": {
+			"line": 16,
+			"column": 11
+		}
 	},
 	{
-		"code": "empty-block",
+		"code": "empty_block",
 		"message": "Empty block",
-		"start": { "line": 17, "column": 13 },
-		"end": { "line": 17, "column": 14 }
+		"start": {
+			"line": 17,
+			"column": 13
+		},
+		"end": {
+			"line": 17,
+			"column": 14
+		}
 	},
 	{
-		"code": "empty-block",
+		"code": "empty_block",
 		"message": "Empty block",
-		"start": { "line": 18, "column": 16 },
-		"end": { "line": 18, "column": 17 }
+		"start": {
+			"line": 18,
+			"column": 16
+		},
+		"end": {
+			"line": 18,
+			"column": 17
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/error-mode-warn/warnings.json b/packages/svelte/tests/validator/samples/error-mode-warn/warnings.json
index 0262068c81..84c1eeca61 100644
--- a/packages/svelte/tests/validator/samples/error-mode-warn/warnings.json
+++ b/packages/svelte/tests/validator/samples/error-mode-warn/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-const-assignment",
+		"code": "invalid_const_assignment",
 		"message": "Invalid assignment to const",
 		"start": {
 			"line": 5,
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "invalid-binding-value",
+		"code": "invalid_binding_value",
 		"message": "Can only bind to state or props",
 		"end": {
 			"column": 29,
diff --git a/packages/svelte/tests/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json b/packages/svelte/tests/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json
index 8783cb30ab..e29a0818c3 100644
--- a/packages/svelte/tests/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json
+++ b/packages/svelte/tests/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "css-unused-selector",
+		"code": "css_unused_selector",
 		"message": "Unused CSS selector \"h1 ~ slot > p\"",
 		"start": {
 			"column": 1,
diff --git a/packages/svelte/tests/validator/samples/global-event-reference/warnings.json b/packages/svelte/tests/validator/samples/global-event-reference/warnings.json
index ccc1e482b5..f6f6f1dc18 100644
--- a/packages/svelte/tests/validator/samples/global-event-reference/warnings.json
+++ b/packages/svelte/tests/validator/samples/global-event-reference/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "global-event-reference",
+		"code": "global_event_reference",
 		"message": "You are referencing globalThis.onkeydown. Did you forget to declare a variable with that name?",
 		"start": {
 			"column": 8,
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "global-event-reference",
+		"code": "global_event_reference",
 		"message": "You are referencing globalThis.onkeydown. Did you forget to declare a variable with that name?",
 		"start": {
 			"column": 8,
diff --git a/packages/svelte/tests/validator/samples/ignore-warning/input.svelte b/packages/svelte/tests/validator/samples/ignore-warning/input.svelte
index c4e7556d74..cfbe0e538d 100644
--- a/packages/svelte/tests/validator/samples/ignore-warning/input.svelte
+++ b/packages/svelte/tests/validator/samples/ignore-warning/input.svelte
@@ -1,7 +1,7 @@
-<!-- svelte-ignore a11y-missing-attribute -->
+<!-- svelte-ignore a11y_missing_attribute -->
 <div>
 	<img src="this-is-fine.jpg">
 	<marquee>but this is still discouraged</marquee>
 </div>
 
-<img src="potato.jpg">
\ No newline at end of file
+<img src="potato.jpg">
diff --git a/packages/svelte/tests/validator/samples/ignore-warning/warnings.json b/packages/svelte/tests/validator/samples/ignore-warning/warnings.json
index 51c940b807..6d1eaf74ad 100644
--- a/packages/svelte/tests/validator/samples/ignore-warning/warnings.json
+++ b/packages/svelte/tests/validator/samples/ignore-warning/warnings.json
@@ -1,23 +1,23 @@
 [
 	{
-		"code": "a11y-distracting-elements",
+		"code": "a11y_distracting_elements",
 		"end": {
 			"column": 49,
 			"line": 4
 		},
-		"message": "A11y: Avoid <marquee> elements",
+		"message": "Avoid <marquee> elements",
 		"start": {
 			"column": 1,
 			"line": 4
 		}
 	},
 	{
-		"code": "a11y-missing-attribute",
+		"code": "a11y_missing_attribute",
 		"end": {
 			"column": 22,
 			"line": 7
 		},
-		"message": "A11y: <img> element should have an alt attribute",
+		"message": "<img> element should have an alt attribute",
 		"start": {
 			"column": 0,
 			"line": 7
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/input.svelte b/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/input.svelte
index 2843a890ce..371d06b6e7 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/input.svelte
+++ b/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/input.svelte
@@ -1,4 +1,4 @@
-<!-- svelte-ignore a11y-structure a11y-missing-attribute -->
+<!-- svelte-ignore a11y_figcaption_parent a11y_missing_attribute -->
 <div>
 	<figure>
 		<img src="potato.jpg">
@@ -7,11 +7,11 @@
 		</marquee>
 	</figure>
 
-	<!-- svelte-ignore a11y-distracting-elements -->
+	<!-- svelte-ignore a11y_distracting_elements -->
 	<figure>
 		<img src="potato.jpg">
 		<marquee>
 			<figcaption>potato</figcaption>
 		</marquee>
 	</figure>
-</div>
\ No newline at end of file
+</div>
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/warnings.json b/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/warnings.json
index 26add431e0..1644aeb831 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/warnings.json
+++ b/packages/svelte/tests/validator/samples/ignore-warnings-cumulative/warnings.json
@@ -1,11 +1,11 @@
 [
 	{
-		"code": "a11y-distracting-elements",
+		"code": "a11y_distracting_elements",
 		"end": {
 			"column": 12,
 			"line": 7
 		},
-		"message": "A11y: Avoid <marquee> elements",
+		"message": "Avoid <marquee> elements",
 		"start": {
 			"column": 2,
 			"line": 5
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings-newline/input.svelte b/packages/svelte/tests/validator/samples/ignore-warnings-newline/input.svelte
index c75a91c630..8471d1d539 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings-newline/input.svelte
+++ b/packages/svelte/tests/validator/samples/ignore-warnings-newline/input.svelte
@@ -1,8 +1,8 @@
-<!-- svelte-ignore a11y-missing-attribute
-                   a11y-distracting-elements -->
+<!-- svelte-ignore a11y_missing_attribute
+                   a11y_distracting_elements -->
 <div>
 	<img src="this-is-fine.jpg">
 	<marquee>but this is still discouraged</marquee>
 </div>
 
-<img src="potato.jpg">
\ No newline at end of file
+<img src="potato.jpg">
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings-newline/warnings.json b/packages/svelte/tests/validator/samples/ignore-warnings-newline/warnings.json
index 03fade839a..eb75343b4e 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings-newline/warnings.json
+++ b/packages/svelte/tests/validator/samples/ignore-warnings-newline/warnings.json
@@ -1,11 +1,11 @@
 [
 	{
-		"code": "a11y-missing-attribute",
+		"code": "a11y_missing_attribute",
 		"end": {
 			"column": 22,
 			"line": 8
 		},
-		"message": "A11y: <img> element should have an alt attribute",
+		"message": "<img> element should have an alt attribute",
 		"start": {
 			"column": 0,
 			"line": 8
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings-stacked/input.svelte b/packages/svelte/tests/validator/samples/ignore-warnings-stacked/input.svelte
index c6edb7240a..5a7f8477ab 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings-stacked/input.svelte
+++ b/packages/svelte/tests/validator/samples/ignore-warnings-stacked/input.svelte
@@ -1,8 +1,8 @@
-<!-- svelte-ignore a11y-missing-attribute -->
-<!-- svelte-ignore a11y-distracting-elements -->
+<!-- svelte-ignore a11y_missing_attribute -->
+<!-- svelte-ignore a11y_distracting_elements -->
 <div>
 	<img src="this-is-fine.jpg">
 	<marquee>but this is still discouraged</marquee>
 </div>
 
-<img src="potato.jpg">
\ No newline at end of file
+<img src="potato.jpg">
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings-stacked/warnings.json b/packages/svelte/tests/validator/samples/ignore-warnings-stacked/warnings.json
index 03fade839a..eb75343b4e 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings-stacked/warnings.json
+++ b/packages/svelte/tests/validator/samples/ignore-warnings-stacked/warnings.json
@@ -1,11 +1,11 @@
 [
 	{
-		"code": "a11y-missing-attribute",
+		"code": "a11y_missing_attribute",
 		"end": {
 			"column": 22,
 			"line": 8
 		},
-		"message": "A11y: <img> element should have an alt attribute",
+		"message": "<img> element should have an alt attribute",
 		"start": {
 			"column": 0,
 			"line": 8
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings/input.svelte b/packages/svelte/tests/validator/samples/ignore-warnings/input.svelte
index 5fd7229f9a..a3999ad901 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings/input.svelte
+++ b/packages/svelte/tests/validator/samples/ignore-warnings/input.svelte
@@ -1,7 +1,7 @@
-<!-- svelte-ignore a11y-missing-attribute a11y-distracting-elements -->
+<!-- svelte-ignore a11y_missing_attribute a11y_distracting_elements -->
 <div>
 	<img src="this-is-fine.jpg">
 	<marquee>but this is still discouraged</marquee>
 </div>
 
-<img src="potato.jpg">
\ No newline at end of file
+<img src="potato.jpg">
diff --git a/packages/svelte/tests/validator/samples/ignore-warnings/warnings.json b/packages/svelte/tests/validator/samples/ignore-warnings/warnings.json
index 9a5be15ae7..3cc9ba0a39 100644
--- a/packages/svelte/tests/validator/samples/ignore-warnings/warnings.json
+++ b/packages/svelte/tests/validator/samples/ignore-warnings/warnings.json
@@ -1,11 +1,11 @@
 [
 	{
-		"code": "a11y-missing-attribute",
+		"code": "a11y_missing_attribute",
 		"end": {
 			"column": 22,
 			"line": 7
 		},
-		"message": "A11y: <img> element should have an alt attribute",
+		"message": "<img> element should have an alt attribute",
 		"start": {
 			"column": 0,
 			"line": 7
diff --git a/packages/svelte/tests/validator/samples/illegal-attribute-character/warnings.json b/packages/svelte/tests/validator/samples/illegal-attribute-character/warnings.json
index 391bb187ea..18b5b6f202 100644
--- a/packages/svelte/tests/validator/samples/illegal-attribute-character/warnings.json
+++ b/packages/svelte/tests/validator/samples/illegal-attribute-character/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "illegal-attribute-character",
+		"code": "illegal_attribute_character",
 		"end": {
 			"column": 15,
 			"line": 14
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "illegal-attribute-character",
+		"code": "illegal_attribute_character",
 		"end": {
 			"column": 10,
 			"line": 15
diff --git a/packages/svelte/tests/validator/samples/inline-new-class-2/warnings.json b/packages/svelte/tests/validator/samples/inline-new-class-2/warnings.json
index 6956314377..8d1918f8c6 100644
--- a/packages/svelte/tests/validator/samples/inline-new-class-2/warnings.json
+++ b/packages/svelte/tests/validator/samples/inline-new-class-2/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "avoid-nested-class",
+		"code": "avoid_nested_class",
 		"message": "Avoid declaring classes below the top level scope",
 		"start": {
 			"column": 2,
diff --git a/packages/svelte/tests/validator/samples/inline-new-class-4/warnings.json b/packages/svelte/tests/validator/samples/inline-new-class-4/warnings.json
index 71beba537f..73f1293158 100644
--- a/packages/svelte/tests/validator/samples/inline-new-class-4/warnings.json
+++ b/packages/svelte/tests/validator/samples/inline-new-class-4/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "avoid-inline-class",
+		"code": "avoid_inline_class",
 		"message": "Avoid 'new class' — instead, declare the class at the top level scope",
 		"start": {
 			"column": 12,
diff --git a/packages/svelte/tests/validator/samples/inline-new-class/warnings.json b/packages/svelte/tests/validator/samples/inline-new-class/warnings.json
index 6995428bee..16f2e2c3c2 100644
--- a/packages/svelte/tests/validator/samples/inline-new-class/warnings.json
+++ b/packages/svelte/tests/validator/samples/inline-new-class/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "avoid-inline-class",
+		"code": "avoid_inline_class",
 		"message": "Avoid 'new class' — instead, declare the class at the top level scope",
 		"start": {
 			"column": 11,
diff --git a/packages/svelte/tests/validator/samples/invalid-self-closing-tag/warnings.json b/packages/svelte/tests/validator/samples/invalid-self-closing-tag/warnings.json
index 772140c44e..4e377fa9f1 100644
--- a/packages/svelte/tests/validator/samples/invalid-self-closing-tag/warnings.json
+++ b/packages/svelte/tests/validator/samples/invalid-self-closing-tag/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-self-closing-tag",
+		"code": "invalid_self_closing_tag",
 		"message": "Self-closing HTML tags for non-void elements are ambiguous — use <div ...></div> rather than <div ... />",
 		"start": {
 			"line": 6,
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "invalid-self-closing-tag",
+		"code": "invalid_self_closing_tag",
 		"message": "Self-closing HTML tags for non-void elements are ambiguous — use <my-thing ...></my-thing> rather than <my-thing ... />",
 		"start": {
 			"line": 7,
diff --git a/packages/svelte/tests/validator/samples/module-script-reactive-declaration/warnings.json b/packages/svelte/tests/validator/samples/module-script-reactive-declaration/warnings.json
index df53ed6123..60fe159479 100644
--- a/packages/svelte/tests/validator/samples/module-script-reactive-declaration/warnings.json
+++ b/packages/svelte/tests/validator/samples/module-script-reactive-declaration/warnings.json
@@ -1,8 +1,14 @@
 [
 	{
 		"message": "Reactive declarations only exist at the top level of the instance script",
-		"code": "no-reactive-declaration",
-		"start": { "line": 4, "column": 1 },
-		"end": { "line": 4, "column": 23 }
+		"code": "no_reactive_declaration",
+		"start": {
+			"line": 4,
+			"column": 1
+		},
+		"end": {
+			"line": 4,
+			"column": 23
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/reactive-declaration-non-top-level/warnings.json b/packages/svelte/tests/validator/samples/reactive-declaration-non-top-level/warnings.json
index f7598524e2..452333ed98 100644
--- a/packages/svelte/tests/validator/samples/reactive-declaration-non-top-level/warnings.json
+++ b/packages/svelte/tests/validator/samples/reactive-declaration-non-top-level/warnings.json
@@ -1,8 +1,14 @@
 [
 	{
 		"message": "Reactive declarations only exist at the top level of the instance script",
-		"code": "no-reactive-declaration",
-		"start": { "line": 6, "column": 2 },
-		"end": { "line": 6, "column": 22 }
+		"code": "no_reactive_declaration",
+		"start": {
+			"line": 6,
+			"column": 2
+		},
+		"end": {
+			"line": 6,
+			"column": 22
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/reactive-module-variable/warnings.json b/packages/svelte/tests/validator/samples/reactive-module-variable/warnings.json
index 60701e30b7..f47e0e4952 100644
--- a/packages/svelte/tests/validator/samples/reactive-module-variable/warnings.json
+++ b/packages/svelte/tests/validator/samples/reactive-module-variable/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "module-script-reactive-declaration",
+		"code": "module_script_reactive_declaration",
 		"message": "All dependencies of the reactive declaration are declared in a module script and will not be reactive",
 		"start": {
 			"column": 1,
diff --git a/packages/svelte/tests/validator/samples/rest-eachblock-binding-2/warnings.json b/packages/svelte/tests/validator/samples/rest-eachblock-binding-2/warnings.json
index 64d71823dd..08cf4a4752 100644
--- a/packages/svelte/tests/validator/samples/rest-eachblock-binding-2/warnings.json
+++ b/packages/svelte/tests/validator/samples/rest-eachblock-binding-2/warnings.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-rest-eachblock-binding",
+		"code": "invalid_rest_eachblock_binding",
 		"message": "The rest operator (...) will create a new object and binding 'rest' with the original object will not work",
-		"start": { "line": 8, "column": 27 },
-		"end": { "line": 8, "column": 31 }
+		"start": {
+			"line": 8,
+			"column": 27
+		},
+		"end": {
+			"line": 8,
+			"column": 31
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/rest-eachblock-binding-3/warnings.json b/packages/svelte/tests/validator/samples/rest-eachblock-binding-3/warnings.json
index cad7a4e0fe..55a2c2d7a5 100644
--- a/packages/svelte/tests/validator/samples/rest-eachblock-binding-3/warnings.json
+++ b/packages/svelte/tests/validator/samples/rest-eachblock-binding-3/warnings.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-rest-eachblock-binding",
+		"code": "invalid_rest_eachblock_binding",
 		"message": "The rest operator (...) will create a new object and binding 'rest' with the original object will not work",
-		"start": { "line": 5, "column": 35 },
-		"end": { "line": 5, "column": 39 }
+		"start": {
+			"line": 5,
+			"column": 35
+		},
+		"end": {
+			"line": 5,
+			"column": 39
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/rest-eachblock-binding-nested-rest/warnings.json b/packages/svelte/tests/validator/samples/rest-eachblock-binding-nested-rest/warnings.json
index e8615de680..f457198a7d 100644
--- a/packages/svelte/tests/validator/samples/rest-eachblock-binding-nested-rest/warnings.json
+++ b/packages/svelte/tests/validator/samples/rest-eachblock-binding-nested-rest/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-rest-eachblock-binding",
+		"code": "invalid_rest_eachblock_binding",
 		"end": {
 			"column": 37,
 			"line": 5
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "invalid-rest-eachblock-binding",
+		"code": "invalid_rest_eachblock_binding",
 		"end": {
 			"column": 50,
 			"line": 5
diff --git a/packages/svelte/tests/validator/samples/rest-eachblock-binding/warnings.json b/packages/svelte/tests/validator/samples/rest-eachblock-binding/warnings.json
index 68ae480882..0841781c7f 100644
--- a/packages/svelte/tests/validator/samples/rest-eachblock-binding/warnings.json
+++ b/packages/svelte/tests/validator/samples/rest-eachblock-binding/warnings.json
@@ -1,8 +1,14 @@
 [
 	{
-		"code": "invalid-rest-eachblock-binding",
+		"code": "invalid_rest_eachblock_binding",
 		"message": "The rest operator (...) will create a new object and binding 'rest' with the original object will not work",
-		"start": { "line": 5, "column": 28 },
-		"end": { "line": 5, "column": 32 }
+		"start": {
+			"line": 5,
+			"column": 28
+		},
+		"end": {
+			"line": 5,
+			"column": 32
+		}
 	}
 ]
diff --git a/packages/svelte/tests/validator/samples/runes-bindable-not-called/warnings.json b/packages/svelte/tests/validator/samples/runes-bindable-not-called/warnings.json
index ebcd065f31..f6d4927f60 100644
--- a/packages/svelte/tests/validator/samples/runes-bindable-not-called/warnings.json
+++ b/packages/svelte/tests/validator/samples/runes-bindable-not-called/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-bindable-declaration",
-		"message": "Bindable component properties are declared using $bindable() in runes mode. Did you forget to call the function?",
+		"code": "invalid_bindable_declaration",
+		"message": "Bindable component properties are declared using `$bindable()` in runes mode. Did you forget to call the function?",
 		"start": {
 			"column": 7,
 			"line": 2
diff --git a/packages/svelte/tests/validator/samples/runes-legacy-syntax-warnings/warnings.json b/packages/svelte/tests/validator/samples/runes-legacy-syntax-warnings/warnings.json
index c841de3686..b7db493e68 100644
--- a/packages/svelte/tests/validator/samples/runes-legacy-syntax-warnings/warnings.json
+++ b/packages/svelte/tests/validator/samples/runes-legacy-syntax-warnings/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "deprecated-slot-element",
+		"code": "deprecated_slot_element",
 		"end": {
 			"column": 13,
 			"line": 11
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "deprecated-slot-element",
+		"code": "deprecated_slot_element",
 		"end": {
 			"column": 24,
 			"line": 12
@@ -24,7 +24,7 @@
 		}
 	},
 	{
-		"code": "deprecated-event-handler",
+		"code": "deprecated_event_handler",
 		"end": {
 			"column": 22,
 			"line": 13
diff --git a/packages/svelte/tests/validator/samples/runes-props-not-called/warnings.json b/packages/svelte/tests/validator/samples/runes-props-not-called/warnings.json
index d1900a3085..b906f65c36 100644
--- a/packages/svelte/tests/validator/samples/runes-props-not-called/warnings.json
+++ b/packages/svelte/tests/validator/samples/runes-props-not-called/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "invalid-props-declaration",
-		"message": "Component properties are declared using $props() in runes mode. Did you forget to call the function?",
+		"code": "invalid_props_declaration",
+		"message": "Component properties are declared using `$props()` in runes mode. Did you forget to call the function?",
 		"start": {
 			"column": 5,
 			"line": 2
diff --git a/packages/svelte/tests/validator/samples/runes-referenced-nonstate-bind-this/warnings.json b/packages/svelte/tests/validator/samples/runes-referenced-nonstate-bind-this/warnings.json
index d0b8f7bd3d..bc575249f3 100644
--- a/packages/svelte/tests/validator/samples/runes-referenced-nonstate-bind-this/warnings.json
+++ b/packages/svelte/tests/validator/samples/runes-referenced-nonstate-bind-this/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "non-state-reference",
-		"message": "does_need1 is updated, but is not declared with $state(...). Changing its value will not correctly trigger updates.",
+		"code": "non_state_reference",
+		"message": "`does_need1` is updated, but is not declared with `$state(...)`. Changing its value will not correctly trigger updates",
 		"start": {
 			"column": 5,
 			"line": 3
diff --git a/packages/svelte/tests/validator/samples/runes-referenced-nonstate/warnings.json b/packages/svelte/tests/validator/samples/runes-referenced-nonstate/warnings.json
index 7e251a4e70..348b270bf6 100644
--- a/packages/svelte/tests/validator/samples/runes-referenced-nonstate/warnings.json
+++ b/packages/svelte/tests/validator/samples/runes-referenced-nonstate/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "non-state-reference",
-		"message": "b is updated, but is not declared with $state(...). Changing its value will not correctly trigger updates.",
+		"code": "non_state_reference",
+		"message": "`b` is updated, but is not declared with `$state(...)`. Changing its value will not correctly trigger updates",
 		"start": {
 			"column": 5,
 			"line": 3
@@ -12,8 +12,8 @@
 		}
 	},
 	{
-		"code": "non-state-reference",
-		"message": "c is updated, but is not declared with $state(...). Changing its value will not correctly trigger updates.",
+		"code": "non_state_reference",
+		"message": "`c` is updated, but is not declared with `$state(...)`. Changing its value will not correctly trigger updates",
 		"start": {
 			"column": 5,
 			"line": 4
diff --git a/packages/svelte/tests/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json b/packages/svelte/tests/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json
index f641467e9a..7e0b05fd43 100644
--- a/packages/svelte/tests/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json
+++ b/packages/svelte/tests/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "css-unused-selector",
+		"code": "css_unused_selector",
 		"end": {
 			"column": 17,
 			"line": 10
diff --git a/packages/svelte/tests/validator/samples/silence-warnings-2/input.svelte b/packages/svelte/tests/validator/samples/silence-warnings-2/input.svelte
index e043fdafd3..3c644b1248 100644
--- a/packages/svelte/tests/validator/samples/silence-warnings-2/input.svelte
+++ b/packages/svelte/tests/validator/samples/silence-warnings-2/input.svelte
@@ -2,7 +2,7 @@
 	let foo;
 </script>
 
-<!-- svelte-ignore module-script-reactive-declaration -->
+<!-- svelte-ignore module_script_reactive_declaration -->
 <script>
 	$: reactive = foo;
 </script>
diff --git a/packages/svelte/tests/validator/samples/silence-warnings/input.svelte b/packages/svelte/tests/validator/samples/silence-warnings/input.svelte
index 8e1608d837..24becff683 100644
--- a/packages/svelte/tests/validator/samples/silence-warnings/input.svelte
+++ b/packages/svelte/tests/validator/samples/silence-warnings/input.svelte
@@ -3,11 +3,11 @@
 </script>
 
 <script>
-	// svelte-ignore module-script-reactive-declaration
+	// svelte-ignore module_script_reactive_declaration
 	$: reactive = foo;
 </script>
 
-<!-- svelte-ignore css-unused-selector -->
+<!-- svelte-ignore css_unused_selector -->
 <style>
 	.unused {}
 </style>
diff --git a/packages/svelte/tests/validator/samples/slot-warning-ignore/input.svelte b/packages/svelte/tests/validator/samples/slot-warning-ignore/input.svelte
index 032264aa97..3d176490be 100644
--- a/packages/svelte/tests/validator/samples/slot-warning-ignore/input.svelte
+++ b/packages/svelte/tests/validator/samples/slot-warning-ignore/input.svelte
@@ -3,7 +3,7 @@
 </script>
 
 <Component>
-	<!-- svelte-ignore a11y-click-events-have-key-events -->
-	<!-- svelte-ignore a11y-no-static-element-interactions -->
+	<!-- svelte-ignore a11y_click_events_have_key_events -->
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
 	<div slot='foo' on:click>hi!</div>
 </Component>
diff --git a/packages/svelte/tests/validator/samples/slot-warning/input.svelte b/packages/svelte/tests/validator/samples/slot-warning/input.svelte
index d5f0e7b210..b24dc4b63e 100644
--- a/packages/svelte/tests/validator/samples/slot-warning/input.svelte
+++ b/packages/svelte/tests/validator/samples/slot-warning/input.svelte
@@ -3,6 +3,6 @@
 </script>
 
 <Component>
-	<!-- svelte-ignore a11y-no-static-element-interactions -->
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
 	<div slot='foo' on:click>hi!</div>
 </Component>
diff --git a/packages/svelte/tests/validator/samples/slot-warning/warnings.json b/packages/svelte/tests/validator/samples/slot-warning/warnings.json
index 57440d2d76..cd66eab361 100644
--- a/packages/svelte/tests/validator/samples/slot-warning/warnings.json
+++ b/packages/svelte/tests/validator/samples/slot-warning/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"column": 1,
 			"line": 7
diff --git a/packages/svelte/tests/validator/samples/slot-warning2/input.svelte b/packages/svelte/tests/validator/samples/slot-warning2/input.svelte
index e1cf63a5bf..5e129425d5 100644
--- a/packages/svelte/tests/validator/samples/slot-warning2/input.svelte
+++ b/packages/svelte/tests/validator/samples/slot-warning2/input.svelte
@@ -3,7 +3,7 @@
 </script>
 
 <Component>
-	<!-- svelte-ignore unrelated-warning -->
-	<!-- svelte-ignore a11y-no-static-element-interactions -->
+	<!-- svelte-ignore unrelated_warning -->
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
 	<div slot='foo' on:click>hi!</div>
 </Component>
diff --git a/packages/svelte/tests/validator/samples/slot-warning2/warnings.json b/packages/svelte/tests/validator/samples/slot-warning2/warnings.json
index 7dff2657d2..24452c7e70 100644
--- a/packages/svelte/tests/validator/samples/slot-warning2/warnings.json
+++ b/packages/svelte/tests/validator/samples/slot-warning2/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "a11y-click-events-have-key-events",
-		"message": "A11y: visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
+		"code": "a11y_click_events_have_key_events",
+		"message": "Visible, non-interactive elements with a click event must be accompanied by a keyboard event handler. Consider whether an interactive element such as <button type=\"button\"> or <a> might be more appropriate. See https://svelte.dev/docs/accessibility-warnings#a11y-click-events-have-key-events for more details.",
 		"start": {
 			"column": 1,
 			"line": 8
diff --git a/packages/svelte/tests/validator/samples/static-state-reference/warnings.json b/packages/svelte/tests/validator/samples/static-state-reference/warnings.json
index 2961bef5f7..b0649869fc 100644
--- a/packages/svelte/tests/validator/samples/static-state-reference/warnings.json
+++ b/packages/svelte/tests/validator/samples/static-state-reference/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "static-state-reference",
+		"code": "static_state_reference",
 		"message": "State referenced in its own scope will never update. Did you mean to reference it inside a closure?",
 		"start": {
 			"column": 13,
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "static-state-reference",
+		"code": "static_state_reference",
 		"message": "State referenced in its own scope will never update. Did you mean to reference it inside a closure?",
 		"start": {
 			"column": 13,
diff --git a/packages/svelte/tests/validator/samples/store-runes-conflict/warnings.json b/packages/svelte/tests/validator/samples/store-runes-conflict/warnings.json
index 58236d814b..0e894db6e1 100644
--- a/packages/svelte/tests/validator/samples/store-runes-conflict/warnings.json
+++ b/packages/svelte/tests/validator/samples/store-runes-conflict/warnings.json
@@ -1,7 +1,7 @@
 [
 	{
-		"code": "store-with-rune-name",
-		"message": "It looks like you're using the $state rune, but there is a local binding called state. Referencing a local variable with a $ prefix will create a store subscription. Please rename state to avoid the ambiguity.",
+		"code": "store_with_rune_name",
+		"message": "It looks like you're using the `$state` rune, but there is a local binding called `state`. Referencing a local variable with a `$` prefix will create a store subscription. Please rename `state` to avoid the ambiguity",
 		"start": {
 			"column": 1,
 			"line": 3
diff --git a/packages/svelte/tests/validator/samples/tag-custom-element-options-missing/warnings.json b/packages/svelte/tests/validator/samples/tag-custom-element-options-missing/warnings.json
index 5ddce88a53..72602abb85 100644
--- a/packages/svelte/tests/validator/samples/tag-custom-element-options-missing/warnings.json
+++ b/packages/svelte/tests/validator/samples/tag-custom-element-options-missing/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "missing-custom-element-compile-option",
+		"code": "missing_custom_element_compile_option",
 		"message": "The 'customElement' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?",
 		"start": {
 			"line": 1,
diff --git a/packages/svelte/tests/validator/samples/unreferenced-variables-each/warnings.json b/packages/svelte/tests/validator/samples/unreferenced-variables-each/warnings.json
index e8791eb61e..0008dd1544 100644
--- a/packages/svelte/tests/validator/samples/unreferenced-variables-each/warnings.json
+++ b/packages/svelte/tests/validator/samples/unreferenced-variables-each/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"message": "Component has unused export property 'default_value_5'. If it is for external reference only, please consider using `export const default_value_5`",
 		"start": {
 			"column": 12,
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"message": "Component has unused export property 'default_value_6'. If it is for external reference only, please consider using `export const default_value_6`",
 		"start": {
 			"column": 12,
diff --git a/packages/svelte/tests/validator/samples/unreferenced-variables/warnings.json b/packages/svelte/tests/validator/samples/unreferenced-variables/warnings.json
index 9690e557ec..12b78ee572 100644
--- a/packages/svelte/tests/validator/samples/unreferenced-variables/warnings.json
+++ b/packages/svelte/tests/validator/samples/unreferenced-variables/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"end": {
 			"column": 8,
 			"line": 28
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"end": {
 			"column": 8,
 			"line": 29
@@ -24,7 +24,7 @@
 		}
 	},
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"end": {
 			"column": 15,
 			"line": 32
@@ -36,7 +36,7 @@
 		}
 	},
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"end": {
 			"column": 15,
 			"line": 33
@@ -48,7 +48,7 @@
 		}
 	},
 	{
-		"code": "unused-export-let",
+		"code": "unused_export_let",
 		"end": {
 			"column": 15,
 			"line": 35
diff --git a/packages/svelte/tests/validator/samples/use-the-platform/warnings.json b/packages/svelte/tests/validator/samples/use-the-platform/warnings.json
index 2dfe6b5c8e..f62bbca540 100644
--- a/packages/svelte/tests/validator/samples/use-the-platform/warnings.json
+++ b/packages/svelte/tests/validator/samples/use-the-platform/warnings.json
@@ -1,6 +1,6 @@
 [
 	{
-		"code": "invalid-html-attribute",
+		"code": "invalid_html_attribute",
 		"message": "'className' is not a valid HTML attribute. Did you mean 'class'?",
 		"start": {
 			"column": 5,
@@ -12,7 +12,7 @@
 		}
 	},
 	{
-		"code": "invalid-html-attribute",
+		"code": "invalid_html_attribute",
 		"message": "'htmlFor' is not a valid HTML attribute. Did you mean 'for'?",
 		"start": {
 			"column": 7,

From 1f04045052fabf2a3b20c77b0fedad97b2f2563a Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Wed, 24 Apr 2024 04:57:50 -0400
Subject: [PATCH 17/18] chore: move legacy context stuff into its own object
 (#11298)

---
 packages/svelte/src/index-client.js           | 15 ++---
 .../internal/client/dom/legacy/lifecycle.js   | 12 ++--
 .../src/internal/client/reactivity/effects.js | 14 ++---
 .../src/internal/client/reactivity/sources.js |  4 +-
 .../svelte/src/internal/client/runtime.js     | 31 ++++------
 .../svelte/src/internal/client/types.d.ts     | 62 ++++++++++++-------
 6 files changed, 75 insertions(+), 63 deletions(-)

diff --git a/packages/svelte/src/index-client.js b/packages/svelte/src/index-client.js
index ba81096925..83fede3863 100644
--- a/packages/svelte/src/index-client.js
+++ b/packages/svelte/src/index-client.js
@@ -21,13 +21,13 @@ export function onMount(fn) {
 		throw new Error('onMount can only be used during component initialisation.');
 	}
 
-	if (current_component_context.r) {
+	if (current_component_context.l !== null) {
+		init_update_callbacks(current_component_context).m.push(fn);
+	} else {
 		user_effect(() => {
 			const cleanup = untrack(fn);
 			if (typeof cleanup === 'function') return /** @type {() => void} */ (cleanup);
 		});
-	} else {
-		init_update_callbacks(current_component_context).m.push(fn);
 	}
 }
 
@@ -129,7 +129,7 @@ export function beforeUpdate(fn) {
 		throw new Error('beforeUpdate can only be used during component initialisation');
 	}
 
-	if (current_component_context.r) {
+	if (current_component_context.l === null) {
 		throw new Error('beforeUpdate cannot be used in runes mode');
 	}
 
@@ -153,7 +153,7 @@ export function afterUpdate(fn) {
 		throw new Error('afterUpdate can only be used during component initialisation.');
 	}
 
-	if (current_component_context.r) {
+	if (current_component_context.l === null) {
 		throw new Error('afterUpdate cannot be used in runes mode');
 	}
 
@@ -162,10 +162,11 @@ export function afterUpdate(fn) {
 
 /**
  * Legacy-mode: Init callbacks object for onMount/beforeUpdate/afterUpdate
- * @param {import('./internal/client/types.js').ComponentContext} context
+ * @param {import('#client').ComponentContext} context
  */
 function init_update_callbacks(context) {
-	return (context.u ??= { a: [], b: [], m: [] });
+	var l = /** @type {import('#client').ComponentContextLegacy} */ (context).l;
+	return (l.u ??= { a: [], b: [], m: [] });
 }
 
 /**
diff --git a/packages/svelte/src/internal/client/dom/legacy/lifecycle.js b/packages/svelte/src/internal/client/dom/legacy/lifecycle.js
index c8a2b72d69..ae4c66ccbb 100644
--- a/packages/svelte/src/internal/client/dom/legacy/lifecycle.js
+++ b/packages/svelte/src/internal/client/dom/legacy/lifecycle.js
@@ -14,9 +14,11 @@ import {
  * Legacy-mode only: Call `onMount` callbacks and set up `beforeUpdate`/`afterUpdate` effects
  */
 export function init() {
-	const context = /** @type {import('#client').ComponentContext} */ (current_component_context);
-	const callbacks = context.u;
+	const context = /** @type {import('#client').ComponentContextLegacy} */ (
+		current_component_context
+	);
 
+	const callbacks = context.l.u;
 	if (!callbacks) return;
 
 	// beforeUpdate
@@ -58,11 +60,11 @@ export function init() {
 /**
  * Invoke the getter of all signals associated with a component
  * so they can be registered to the effect this function is called in.
- * @param {import('#client').ComponentContext} context
+ * @param {import('#client').ComponentContextLegacy} context
  */
 function observe_all(context) {
-	if (context.d) {
-		for (const signal of context.d) get(signal);
+	if (context.l.s) {
+		for (const signal of context.l.s) get(signal);
 	}
 
 	deep_read_state(context.s);
diff --git a/packages/svelte/src/internal/client/reactivity/effects.js b/packages/svelte/src/internal/client/reactivity/effects.js
index 515d13136e..2d2ec5e19c 100644
--- a/packages/svelte/src/internal/client/reactivity/effects.js
+++ b/packages/svelte/src/internal/client/reactivity/effects.js
@@ -182,11 +182,11 @@ export function effect(fn) {
  * @param {() => void | (() => void)} fn
  */
 export function legacy_pre_effect(deps, fn) {
-	var context = /** @type {import('#client').ComponentContext} */ (current_component_context);
+	var context = /** @type {import('#client').ComponentContextLegacy} */ (current_component_context);
 
 	/** @type {{ effect: null | import('#client').Effect, ran: boolean }} */
 	var token = { effect: null, ran: false };
-	context.l1.push(token);
+	context.l.r1.push(token);
 
 	token.effect = render_effect(() => {
 		deps();
@@ -196,19 +196,19 @@ export function legacy_pre_effect(deps, fn) {
 		if (token.ran) return;
 
 		token.ran = true;
-		set(context.l2, true);
+		set(context.l.r2, true);
 		untrack(fn);
 	});
 }
 
 export function legacy_pre_effect_reset() {
-	var context = /** @type {import('#client').ComponentContext} */ (current_component_context);
+	var context = /** @type {import('#client').ComponentContextLegacy} */ (current_component_context);
 
 	render_effect(() => {
-		if (!get(context.l2)) return;
+		if (!get(context.l.r2)) return;
 
 		// Run dirty `$:` statements
-		for (var token of context.l1) {
+		for (var token of context.l.r1) {
 			var effect = token.effect;
 
 			if (check_dirtiness(effect)) {
@@ -218,7 +218,7 @@ export function legacy_pre_effect_reset() {
 			token.ran = false;
 		}
 
-		context.l2.v = false; // set directly to avoid rerunning this effect
+		context.l.r2.v = false; // set directly to avoid rerunning this effect
 	});
 }
 
diff --git a/packages/svelte/src/internal/client/reactivity/sources.js b/packages/svelte/src/internal/client/reactivity/sources.js
index 6ad3240d5e..1b955c42dc 100644
--- a/packages/svelte/src/internal/client/reactivity/sources.js
+++ b/packages/svelte/src/internal/client/reactivity/sources.js
@@ -55,8 +55,8 @@ export function mutable_source(initial_value) {
 
 	// bind the signal to the component context, in case we need to
 	// track updates to trigger beforeUpdate/afterUpdate callbacks
-	if (current_component_context) {
-		(current_component_context.d ??= []).push(s);
+	if (current_component_context !== null && current_component_context.l !== null) {
+		(current_component_context.l.s ??= []).push(s);
 	}
 
 	return s;
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 22038cce70..e8233fbc90 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -115,7 +115,7 @@ export function set_current_component_context(context) {
 
 /** @returns {boolean} */
 export function is_runes() {
-	return current_component_context !== null && current_component_context.r;
+	return current_component_context !== null && current_component_context.l === null;
 }
 
 /**
@@ -1043,29 +1043,24 @@ export async function value_or_fallback_async(value, fallback) {
  */
 export function push(props, runes = false, fn) {
 	current_component_context = {
-		// exports (and props, if `accessors: true`)
-		x: null,
-		// context
+		p: current_component_context,
 		c: null,
-		// effects
 		e: null,
-		// mounted
 		m: false,
-		// parent
-		p: current_component_context,
-		// signals
-		d: null,
-		// props
 		s: props,
-		// runes
-		r: runes,
-		// legacy $:
-		l1: [],
-		l2: source(false),
-		// update_callbacks
-		u: null
+		x: null,
+		l: null
 	};
 
+	if (!runes) {
+		current_component_context.l = {
+			s: null,
+			u: null,
+			r1: [],
+			r2: source(false)
+		};
+	}
+
 	if (DEV) {
 		// component function
 		// @ts-expect-error
diff --git a/packages/svelte/src/internal/client/types.d.ts b/packages/svelte/src/internal/client/types.d.ts
index e1568494a1..dc9672bc0d 100644
--- a/packages/svelte/src/internal/client/types.d.ts
+++ b/packages/svelte/src/internal/client/types.d.ts
@@ -10,37 +10,51 @@ export type EventCallbackMap = Record<string, EventCallback | EventCallback[]>;
 // when the JS VM JITs the code.
 
 export type ComponentContext = {
-	/** local signals (needed for beforeUpdate/afterUpdate) */
-	d: null | Source[];
-	/** props */
-	s: Record<string, unknown>;
-	/** exports (and props, if `accessors: true`) */
-	x: Record<string, any> | null;
-	/** deferred effects */
-	e: null | Array<() => void | (() => void)>;
-	/** mounted */
-	m: boolean;
 	/** parent */
 	p: null | ComponentContext;
 	/** context */
 	c: null | Map<unknown, unknown>;
-	/** runes */
-	r: boolean;
-	/** legacy mode: if `$:` statements are allowed to run (ensures they only run once per render) */
-	l1: any[];
-	/** legacy mode: if `$:` statements are allowed to run (ensures they only run once per render) */
-	l2: Source<boolean>;
-	/** update_callbacks */
-	u: null | {
-		/** afterUpdate callbacks */
-		a: Array<() => void>;
-		/** beforeUpdate callbacks */
-		b: Array<() => void>;
-		/** onMount callbacks */
-		m: Array<() => any>;
+	/** deferred effects */
+	e: null | Array<() => void | (() => void)>;
+	/** mounted */
+	m: boolean;
+	/**
+	 * props — needed for legacy mode lifecycle functions, and for `createEventDispatcher`
+	 * @deprecated remove in 6.0
+	 */
+	s: Record<string, unknown>;
+	/**
+	 * exports (and props, if `accessors: true`) — needed for `createEventDispatcher`
+	 * @deprecated remove in 6.0
+	 */
+	x: Record<string, any> | null;
+	/**
+	 * legacy stuff
+	 * @deprecated remove in 6.0
+	 */
+	l: null | {
+		/** local signals (needed for beforeUpdate/afterUpdate) */
+		s: null | Source[];
+		/** update_callbacks */
+		u: null | {
+			/** afterUpdate callbacks */
+			a: Array<() => void>;
+			/** beforeUpdate callbacks */
+			b: Array<() => void>;
+			/** onMount callbacks */
+			m: Array<() => any>;
+		};
+		/** `$:` statements */
+		r1: any[];
+		/** This tracks whether `$:` statements have run in the current cycle, to ensure they only run once */
+		r2: Source<boolean>;
 	};
 };
 
+export type ComponentContextLegacy = ComponentContext & {
+	l: NonNullable<ComponentContext['l']>;
+};
+
 export type Equals = (this: Value, value: unknown) => boolean;
 
 export type TemplateNode = Text | Element | Comment;

From f6dfac985cf0ad4ae5f2e5cb740ca847def692ab Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Wed, 24 Apr 2024 10:59:16 +0200
Subject: [PATCH 18/18] feat: `Bindable` types (#11225)

This is a typings PR and the companion PR to sveltejs/language-tools#2336

It introduces two new types:
- Binding: Marks a property as being bound (i.e. you must do bind:x)
- Bindable: Marks a property as being able to be bound (i.e. you can do bind:x)

Language tools then uses this generate code accordingly which then generates type errors.

All the other type gymnastics are there to ensure that you don't interact with these bindable types when using mount or hydrate or ComponentProps<MyComponent>, i.e. these two types should be mostly opaque for day-to-day users.

For backwards-compatibility, all properties are automatically wrapped with Bindable, which means existing type definition files will continue to work from a types perspective. Language tools opts into strict bindability by providing its own constructor definition for all generated classes in runes mode which omits the "wrap everything with bindable" behavior.
---
 .changeset/pink-goats-promise.md              |  5 ++
 packages/svelte/src/compiler/index.js         | 26 +++++++
 packages/svelte/src/index.d.ts                | 50 +++++++++---
 packages/svelte/src/internal/client/render.js | 17 ++---
 .../svelte/src/internal/client/types.d.ts     |  1 +
 packages/svelte/src/internal/types.d.ts       |  6 ++
 packages/svelte/tests/types/component.ts      | 55 +++++++++++++-
 packages/svelte/types/index.d.ts              | 76 ++++++++++++++-----
 8 files changed, 193 insertions(+), 43 deletions(-)
 create mode 100644 .changeset/pink-goats-promise.md

diff --git a/.changeset/pink-goats-promise.md b/.changeset/pink-goats-promise.md
new file mode 100644
index 0000000000..fa04e56ef2
--- /dev/null
+++ b/.changeset/pink-goats-promise.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+feat: introduce types to express bindability
diff --git a/packages/svelte/src/compiler/index.js b/packages/svelte/src/compiler/index.js
index c2516a2e5f..97dcc364f0 100644
--- a/packages/svelte/src/compiler/index.js
+++ b/packages/svelte/src/compiler/index.js
@@ -104,6 +104,32 @@ function handle_compile_error(error, filename, source) {
 	throw error;
 }
 
+/**
+ * The parse function parses a component, returning only its abstract syntax tree.
+ *
+ * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+ * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+ *
+ * https://svelte.dev/docs/svelte-compiler#svelte-parse
+ * @overload
+ * @param {string} source
+ * @param {{ filename?: string; modern: true }} options
+ * @returns {import('#compiler').Root}
+ */
+
+/**
+ * The parse function parses a component, returning only its abstract syntax tree.
+ *
+ * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+ * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+ *
+ * https://svelte.dev/docs/svelte-compiler#svelte-parse
+ * @overload
+ * @param {string} source
+ * @param {{ filename?: string; modern?: false }} [options]
+ * @returns {import('./types/legacy-nodes.js').LegacyRoot}
+ */
+
 /**
  * The parse function parses a component, returning only its abstract syntax tree.
  *
diff --git a/packages/svelte/src/index.d.ts b/packages/svelte/src/index.d.ts
index 5239d05f02..2c1b5287d4 100644
--- a/packages/svelte/src/index.d.ts
+++ b/packages/svelte/src/index.d.ts
@@ -1,5 +1,8 @@
 // This should contain all the public interfaces (not all of them are actually importable, check current Svelte for which ones are).
 
+import './ambient.js';
+import type { RemoveBindable } from './internal/types.js';
+
 /**
  * @deprecated Svelte components were classes in Svelte 4. In Svelte 5, thy are not anymore.
  * Use `mount` or `createRoot` instead to instantiate components.
@@ -18,13 +21,37 @@ export interface ComponentConstructorOptions<
 	$$inline?: boolean;
 }
 
-// Utility type for ensuring backwards compatibility on a type level: If there's a default slot, add 'children' to the props if it doesn't exist there already
-type PropsWithChildren<Props, Slots> = Props &
-	(Props extends { children?: any }
-		? {}
-		: Slots extends { default: any }
-			? { children?: Snippet }
-			: {});
+/** Tooling for types uses this for properties are being used with `bind:` */
+export type Binding<T> = { 'bind:': T };
+/**
+ * Tooling for types uses this for properties that may be bound to.
+ * Only use this if you author Svelte component type definition files by hand (we recommend using `@sveltejs/package` instead).
+ * Example:
+ * ```ts
+ * export class MyComponent extends SvelteComponent<{ readonly: string, bindable: Bindable<string> }> {}
+ * ```
+ * means you can now do `<MyComponent {readonly} bind:bindable />`
+ */
+export type Bindable<T> = T | Binding<T>;
+
+type WithBindings<T> = {
+	[Key in keyof T]: Bindable<T[Key]>;
+};
+
+/**
+ * Utility type for ensuring backwards compatibility on a type level:
+ * - If there's a default slot, add 'children' to the props
+ * - All props are bindable
+ */
+type PropsWithChildren<Props, Slots> = WithBindings<Props> &
+	(Slots extends { default: any }
+		? // This is unfortunate because it means "accepts no props" turns into "accepts any prop"
+			// but the alternative is non-fixable type errors because of the way TypeScript index
+			// signatures work (they will always take precedence and make an impossible-to-satisfy children type).
+			Props extends Record<string, never>
+			? any
+			: { children?: any }
+		: {});
 
 /**
  * Can be used to create strongly typed Svelte components.
@@ -55,7 +82,7 @@ type PropsWithChildren<Props, Slots> = Props &
  * for more info.
  */
 export class SvelteComponent<
-	Props extends Record<string, any> = any,
+	Props extends Record<string, any> = Record<string, any>,
 	Events extends Record<string, any> = any,
 	Slots extends Record<string, any> = any
 > {
@@ -74,7 +101,7 @@ export class SvelteComponent<
 	 * Does not exist at runtime.
 	 * ### DO NOT USE!
 	 * */
-	$$prop_def: PropsWithChildren<Props, Slots>;
+	$$prop_def: RemoveBindable<Props>; // Without PropsWithChildren: unnecessary, causes type bugs
 	/**
 	 * For type checking capabilities only.
 	 * Does not exist at runtime.
@@ -119,7 +146,7 @@ export class SvelteComponent<
  * @deprecated Use `SvelteComponent` instead. See TODO for more information.
  */
 export class SvelteComponentTyped<
-	Props extends Record<string, any> = any,
+	Props extends Record<string, any> = Record<string, any>,
 	Events extends Record<string, any> = any,
 	Slots extends Record<string, any> = any
 > extends SvelteComponent<Props, Events, Slots> {}
@@ -154,7 +181,7 @@ export type ComponentEvents<Comp extends SvelteComponent> =
  * ```
  */
 export type ComponentProps<Comp extends SvelteComponent> =
-	Comp extends SvelteComponent<infer Props> ? Props : never;
+	Comp extends SvelteComponent<infer Props> ? RemoveBindable<Props> : never;
 
 /**
  * Convenience type to get the type of a Svelte component. Useful for example in combination with
@@ -226,4 +253,3 @@ export interface EventDispatcher<EventMap extends Record<string, any>> {
 }
 
 export * from './index-client.js';
-import './ambient.js';
diff --git a/packages/svelte/src/internal/client/render.js b/packages/svelte/src/internal/client/render.js
index f9c4dbf1a7..c1b1316cca 100644
--- a/packages/svelte/src/internal/client/render.js
+++ b/packages/svelte/src/internal/client/render.js
@@ -92,7 +92,7 @@ export function stringify(value) {
  * @param {{
  * 		target: Document | Element | ShadowRoot;
  * 		anchor?: Node;
- * 		props?: Props;
+ * 		props?: import('../types.js').RemoveBindable<Props>;
  * 		events?: { [Property in keyof Events]: (e: Events[Property]) => any };
  * 		context?: Map<any, any>;
  * 		intro?: boolean;
@@ -114,7 +114,7 @@ export function mount(component, options) {
  * @param {import('../../index.js').ComponentType<import('../../index.js').SvelteComponent<Props, Events>>} component
  * @param {{
  * 		target: Document | Element | ShadowRoot;
- * 		props?: Props;
+ * 		props?: import('../types.js').RemoveBindable<Props>;
  * 		events?: { [Property in keyof Events]: (e: Events[Property]) => any };
  *  	context?: Map<any, any>;
  * 		intro?: boolean;
@@ -181,24 +181,19 @@ export function hydrate(component, options) {
 }
 
 /**
- * @template {Record<string, any>} Props
  * @template {Record<string, any>} Exports
- * @template {Record<string, any>} Events
- * @param {import('../../index.js').ComponentType<import('../../index.js').SvelteComponent<Props, Events>>} Component
+ * @param {import('../../index.js').ComponentType<import('../../index.js').SvelteComponent<any>>} Component
  * @param {{
  * 		target: Document | Element | ShadowRoot;
  * 		anchor: Node;
- * 		props?: Props;
- * 		events?: { [Property in keyof Events]: (e: Events[Property]) => any };
+ * 		props?: any;
+ * 		events?: any;
  * 		context?: Map<any, any>;
  * 		intro?: boolean;
  * 	}} options
  * @returns {Exports}
  */
-function _mount(
-	Component,
-	{ target, anchor, props = /** @type {Props} */ ({}), events, context, intro = false }
-) {
+function _mount(Component, { target, anchor, props = {}, events, context, intro = false }) {
 	init_operations();
 
 	const registered_events = new Set();
diff --git a/packages/svelte/src/internal/client/types.d.ts b/packages/svelte/src/internal/client/types.d.ts
index dc9672bc0d..aa2a3321b8 100644
--- a/packages/svelte/src/internal/client/types.d.ts
+++ b/packages/svelte/src/internal/client/types.d.ts
@@ -1,3 +1,4 @@
+import type { Bindable, Binding } from '../../index.js';
 import type { Store } from '#shared';
 import { STATE_SYMBOL } from './constants.js';
 import type { Effect, Source, Value } from './reactivity/types.js';
diff --git a/packages/svelte/src/internal/types.d.ts b/packages/svelte/src/internal/types.d.ts
index 12b2e5d4fb..1508f2ac84 100644
--- a/packages/svelte/src/internal/types.d.ts
+++ b/packages/svelte/src/internal/types.d.ts
@@ -1,2 +1,8 @@
+import type { Bindable } from '../index.js';
+
 /** Anything except a function */
 export type NotFunction<T> = T extends Function ? never : T;
+
+export type RemoveBindable<Props extends Record<string, any>> = {
+	[Key in keyof Props]: Props[Key] extends Bindable<infer Value> ? Value : Props[Key];
+};
diff --git a/packages/svelte/tests/types/component.ts b/packages/svelte/tests/types/component.ts
index 55477441bb..affb2f36fb 100644
--- a/packages/svelte/tests/types/component.ts
+++ b/packages/svelte/tests/types/component.ts
@@ -5,7 +5,10 @@ import {
 	type ComponentProps,
 	type ComponentType,
 	mount,
-	hydrate
+	hydrate,
+	type Bindable,
+	type Binding,
+	type ComponentConstructorOptions
 } from 'svelte';
 
 SvelteComponent.element === HTMLElement;
@@ -174,3 +177,53 @@ const x: typeof asLegacyComponent = createClassComponent({
 	hydrate: true,
 	component: NewComponent
 });
+
+// --------------------------------------------------------------------------- bindable
+
+// Test that
+// - everything's bindable unless the component constructor is specifically set telling otherwise (for backwards compatibility)
+// - when using mount etc the props are never bindable because this is language-tools only concept
+
+function binding<T>(value: T): Binding<T> {
+	return value as any;
+}
+
+class Explicit extends SvelteComponent<{
+	foo: string;
+	bar: Bindable<boolean>;
+}> {
+	constructor(options: ComponentConstructorOptions<{ foo: string; bar: Bindable<boolean> }>) {
+		super(options);
+	}
+}
+new Explicit({ target: null as any, props: { foo: 'foo', bar: binding(true) } });
+new Explicit({ target: null as any, props: { foo: 'foo', bar: true } });
+new Explicit({
+	target: null as any,
+	props: {
+		// @ts-expect-error
+		foo: binding(''),
+		bar: true
+	}
+});
+mount(Explicit, { target: null as any, props: { foo: 'foo', bar: true } });
+mount(Explicit, {
+	target: null as any,
+	props: {
+		// @ts-expect-error
+		bar: binding(true)
+	}
+});
+
+class Implicit extends SvelteComponent<{ foo: string; bar: boolean }> {}
+new Implicit({ target: null as any, props: { foo: 'foo', bar: true } });
+new Implicit({ target: null as any, props: { foo: binding(''), bar: binding(true) } });
+mount(Implicit, { target: null as any, props: { foo: 'foo', bar: true } });
+mount(Implicit, {
+	target: null as any,
+	props: {
+		foo: 'foo',
+		// @ts-expect-error
+		bar: binding(true)
+	}
+});
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 5563610b94..c5c91e67cc 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -1,6 +1,4 @@
 declare module 'svelte' {
-	// This should contain all the public interfaces (not all of them are actually importable, check current Svelte for which ones are).
-
 	/**
 	 * @deprecated Svelte components were classes in Svelte 4. In Svelte 5, thy are not anymore.
 	 * Use `mount` or `createRoot` instead to instantiate components.
@@ -19,13 +17,37 @@ declare module 'svelte' {
 		$$inline?: boolean;
 	}
 
-	// Utility type for ensuring backwards compatibility on a type level: If there's a default slot, add 'children' to the props if it doesn't exist there already
-	type PropsWithChildren<Props, Slots> = Props &
-		(Props extends { children?: any }
-			? {}
-			: Slots extends { default: any }
-				? { children?: Snippet }
-				: {});
+	/** Tooling for types uses this for properties are being used with `bind:` */
+	export type Binding<T> = { 'bind:': T };
+	/**
+	 * Tooling for types uses this for properties that may be bound to.
+	 * Only use this if you author Svelte component type definition files by hand (we recommend using `@sveltejs/package` instead).
+	 * Example:
+	 * ```ts
+	 * export class MyComponent extends SvelteComponent<{ readonly: string, bindable: Bindable<string> }> {}
+	 * ```
+	 * means you can now do `<MyComponent {readonly} bind:bindable />`
+	 */
+	export type Bindable<T> = T | Binding<T>;
+
+	type WithBindings<T> = {
+		[Key in keyof T]: Bindable<T[Key]>;
+	};
+
+	/**
+	 * Utility type for ensuring backwards compatibility on a type level:
+	 * - If there's a default slot, add 'children' to the props
+	 * - All props are bindable
+	 */
+	type PropsWithChildren<Props, Slots> = WithBindings<Props> &
+		(Slots extends { default: any }
+			? // This is unfortunate because it means "accepts no props" turns into "accepts any prop"
+				// but the alternative is non-fixable type errors because of the way TypeScript index
+				// signatures work (they will always take precedence and make an impossible-to-satisfy children type).
+				Props extends Record<string, never>
+				? any
+				: { children?: any }
+			: {});
 
 	/**
 	 * Can be used to create strongly typed Svelte components.
@@ -56,7 +78,7 @@ declare module 'svelte' {
 	 * for more info.
 	 */
 	export class SvelteComponent<
-		Props extends Record<string, any> = any,
+		Props extends Record<string, any> = Record<string, any>,
 		Events extends Record<string, any> = any,
 		Slots extends Record<string, any> = any
 	> {
@@ -75,7 +97,7 @@ declare module 'svelte' {
 		 * Does not exist at runtime.
 		 * ### DO NOT USE!
 		 * */
-		$$prop_def: PropsWithChildren<Props, Slots>;
+		$$prop_def: RemoveBindable<Props>; // Without PropsWithChildren: unnecessary, causes type bugs
 		/**
 		 * For type checking capabilities only.
 		 * Does not exist at runtime.
@@ -120,7 +142,7 @@ declare module 'svelte' {
 	 * @deprecated Use `SvelteComponent` instead. See TODO for more information.
 	 */
 	export class SvelteComponentTyped<
-		Props extends Record<string, any> = any,
+		Props extends Record<string, any> = Record<string, any>,
 		Events extends Record<string, any> = any,
 		Slots extends Record<string, any> = any
 	> extends SvelteComponent<Props, Events, Slots> {}
@@ -155,7 +177,7 @@ declare module 'svelte' {
 	 * ```
 	 */
 	export type ComponentProps<Comp extends SvelteComponent> =
-		Comp extends SvelteComponent<infer Props> ? Props : never;
+		Comp extends SvelteComponent<infer Props> ? RemoveBindable<Props> : never;
 
 	/**
 	 * Convenience type to get the type of a Svelte component. Useful for example in combination with
@@ -225,6 +247,12 @@ declare module 'svelte' {
 					: [type: Type, parameter: EventMap[Type], options?: DispatchOptions]
 		): boolean;
 	}
+	/** Anything except a function */
+	type NotFunction<T> = T extends Function ? never : T;
+
+	type RemoveBindable<Props extends Record<string, any>> = {
+		[Key in keyof Props]: Props[Key] extends Bindable<infer Value> ? Value : Props[Key];
+	};
 	/**
 	 * The `onMount` function schedules a callback to run as soon as the component has been mounted to the DOM.
 	 * It must be called during the component's initialisation (but doesn't need to live *inside* the component;
@@ -295,8 +323,6 @@ declare module 'svelte' {
 	 * Synchronously flushes any pending state changes and those that result from it.
 	 * */
 	export function flushSync(fn?: (() => void) | undefined): void;
-	/** Anything except a function */
-	type NotFunction<T> = T extends Function ? never : T;
 	/**
 	 * Mounts a component to the given target and returns the exports and potentially the props (if compiled with `accessors: true`) of the component
 	 *
@@ -304,7 +330,7 @@ declare module 'svelte' {
 	export function mount<Props extends Record<string, any>, Exports extends Record<string, any>, Events extends Record<string, any>>(component: ComponentType<SvelteComponent<Props, Events, any>>, options: {
 		target: Document | Element | ShadowRoot;
 		anchor?: Node | undefined;
-		props?: Props | undefined;
+		props?: RemoveBindable<Props> | undefined;
 		events?: { [Property in keyof Events]: (e: Events[Property]) => any; } | undefined;
 		context?: Map<any, any> | undefined;
 		intro?: boolean | undefined;
@@ -315,7 +341,7 @@ declare module 'svelte' {
 	 * */
 	export function hydrate<Props extends Record<string, any>, Exports extends Record<string, any>, Events extends Record<string, any>>(component: ComponentType<SvelteComponent<Props, Events, any>>, options: {
 		target: Document | Element | ShadowRoot;
-		props?: Props | undefined;
+		props?: RemoveBindable<Props> | undefined;
 		events?: { [Property in keyof Events]: (e: Events[Property]) => any; } | undefined;
 		context?: Map<any, any> | undefined;
 		intro?: boolean | undefined;
@@ -492,6 +518,18 @@ declare module 'svelte/compiler' {
 	 * @param source The component source code
 	 * */
 	export function compileModule(source: string, options: ModuleCompileOptions): CompileResult;
+	/**
+	 * The parse function parses a component, returning only its abstract syntax tree.
+	 *
+	 * The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
+	 * `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
+	 *
+	 * https://svelte.dev/docs/svelte-compiler#svelte-parse
+	 * */
+	export function parse(source: string, options: {
+		filename?: string;
+		modern: true;
+	}): Root;
 	/**
 	 * The parse function parses a component, returning only its abstract syntax tree.
 	 *
@@ -502,8 +540,8 @@ declare module 'svelte/compiler' {
 	 * */
 	export function parse(source: string, options?: {
 		filename?: string | undefined;
-		modern?: boolean | undefined;
-	} | undefined): Root | LegacyRoot;
+		modern?: false | undefined;
+	} | undefined): LegacyRoot;
 	/**
 	 * @deprecated Replace this with `import { walk } from 'estree-walker'`
 	 * */