diff --git a/.changeset/four-balloons-beam.md b/.changeset/four-balloons-beam.md
new file mode 100644
index 0000000000..4bb459c6d7
--- /dev/null
+++ b/.changeset/four-balloons-beam.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: mark function properties on runes as deprecated for better intellisense
diff --git a/packages/svelte/src/ambient.d.ts b/packages/svelte/src/ambient.d.ts
index b65346dd7d..0698530fc3 100644
--- a/packages/svelte/src/ambient.d.ts
+++ b/packages/svelte/src/ambient.d.ts
@@ -62,6 +62,27 @@ declare namespace $state {
 	 * @param state The value to snapshot
 	 */
 	export function snapshot<T>(state: T): T;
+
+	// prevent intellisense from being unhelpful
+	/** @deprecated */
+	export const apply: never;
+	/** @deprecated */
+	// @ts-ignore
+	export const arguments: never;
+	/** @deprecated */
+	export const bind: never;
+	/** @deprecated */
+	export const call: never;
+	/** @deprecated */
+	export const caller: never;
+	/** @deprecated */
+	export const length: never;
+	/** @deprecated */
+	export const name: never;
+	/** @deprecated */
+	export const prototype: never;
+	/** @deprecated */
+	export const toString: never;
 }
 
 /**
@@ -98,6 +119,27 @@ declare namespace $derived {
 	 * https://svelte-5-preview.vercel.app/docs/runes#$derived-by
 	 */
 	export function by<T>(fn: () => T): T;
+
+	// prevent intellisense from being unhelpful
+	/** @deprecated */
+	export const apply: never;
+	/** @deprecated */
+	// @ts-ignore
+	export const arguments: never;
+	/** @deprecated */
+	export const bind: never;
+	/** @deprecated */
+	export const call: never;
+	/** @deprecated */
+	export const caller: never;
+	/** @deprecated */
+	export const length: never;
+	/** @deprecated */
+	export const name: never;
+	/** @deprecated */
+	export const prototype: never;
+	/** @deprecated */
+	export const toString: never;
 }
 
 /**
@@ -186,6 +228,27 @@ declare namespace $effect {
 	 * https://svelte-5-preview.vercel.app/docs/runes#$effect-root
 	 */
 	export function root(fn: () => void | (() => void)): () => void;
+
+	// prevent intellisense from being unhelpful
+	/** @deprecated */
+	export const apply: never;
+	/** @deprecated */
+	// @ts-ignore
+	export const arguments: never;
+	/** @deprecated */
+	export const bind: never;
+	/** @deprecated */
+	export const call: never;
+	/** @deprecated */
+	export const caller: never;
+	/** @deprecated */
+	export const length: never;
+	/** @deprecated */
+	export const name: never;
+	/** @deprecated */
+	export const prototype: never;
+	/** @deprecated */
+	export const toString: never;
 }
 
 /**
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 7bfdee575c..daff299768 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -2623,6 +2623,27 @@ declare namespace $state {
 	 * @param state The value to snapshot
 	 */
 	export function snapshot<T>(state: T): T;
+
+	// prevent intellisense from being unhelpful
+	/** @deprecated */
+	export const apply: never;
+	/** @deprecated */
+	// @ts-ignore
+	export const arguments: never;
+	/** @deprecated */
+	export const bind: never;
+	/** @deprecated */
+	export const call: never;
+	/** @deprecated */
+	export const caller: never;
+	/** @deprecated */
+	export const length: never;
+	/** @deprecated */
+	export const name: never;
+	/** @deprecated */
+	export const prototype: never;
+	/** @deprecated */
+	export const toString: never;
 }
 
 /**
@@ -2659,6 +2680,27 @@ declare namespace $derived {
 	 * https://svelte-5-preview.vercel.app/docs/runes#$derived-by
 	 */
 	export function by<T>(fn: () => T): T;
+
+	// prevent intellisense from being unhelpful
+	/** @deprecated */
+	export const apply: never;
+	/** @deprecated */
+	// @ts-ignore
+	export const arguments: never;
+	/** @deprecated */
+	export const bind: never;
+	/** @deprecated */
+	export const call: never;
+	/** @deprecated */
+	export const caller: never;
+	/** @deprecated */
+	export const length: never;
+	/** @deprecated */
+	export const name: never;
+	/** @deprecated */
+	export const prototype: never;
+	/** @deprecated */
+	export const toString: never;
 }
 
 /**
@@ -2747,6 +2789,27 @@ declare namespace $effect {
 	 * https://svelte-5-preview.vercel.app/docs/runes#$effect-root
 	 */
 	export function root(fn: () => void | (() => void)): () => void;
+
+	// prevent intellisense from being unhelpful
+	/** @deprecated */
+	export const apply: never;
+	/** @deprecated */
+	// @ts-ignore
+	export const arguments: never;
+	/** @deprecated */
+	export const bind: never;
+	/** @deprecated */
+	export const call: never;
+	/** @deprecated */
+	export const caller: never;
+	/** @deprecated */
+	export const length: never;
+	/** @deprecated */
+	export const name: never;
+	/** @deprecated */
+	export const prototype: never;
+	/** @deprecated */
+	export const toString: never;
 }
 
 /**