Try the pre-generate route

sites/svelte.dev/.gitignore

@@ -10,3 +10,4 @@
 /src/routes/_components/Supporters/donors.jpg
 /src/routes/_components/Supporters/donors.js
 .vercel
+examples-data.js

sites/svelte.dev/package.json

@@ -4,8 +4,8 @@
 	"description": "Docs and examples for Svelte",
 	"type": "module",
 	"scripts": {
-    "dev": "node scripts/update.js && vite dev",
+		"dev": "node scripts/generate_examples.js && node scripts/update.js && vite dev",
-    "build": "node scripts/update.js && vite build",
+		"build": "node scripts/generate_examples.js && node scripts/update.js && vite build",
 		"update": "node scripts/update.js --force=true",
 		"preview": "vite preview",
 		"start": "node build",

sites/svelte.dev/scripts/generate_examples.js

@@ -0,0 +1,11 @@
+import { get_examples_data } from '../src/lib/server/examples/get-examples.js';
+import fs from 'node:fs';
+
+const examples_data = get_examples_data(
+	new URL('../../../site/content/examples', import.meta.url).pathname
+);
+
+fs.writeFileSync(
+	new URL('../src/routes/(authed)/repl/[id].json/examples-data.js', import.meta.url),
+	`export default ${JSON.stringify(examples_data)}`
+);

sites/svelte.dev/src/routes/(authed)/+layout.server.js

@@ -2,6 +2,6 @@ import * as session from '$lib/db/session';
 
 export async function load({ request }) {
 	return {
-		user: await session.from_cookie(request.headers.get('cookie'))
+		user: session.from_cookie(request.headers.get('cookie')),
 	};
 }

sites/svelte.dev/src/routes/(authed)/repl/[id].json/+server.js

@@ -4,6 +4,7 @@ import * as gist from '$lib/db/gist';
 import { get_example } from '$lib/server/examples';
 import { get_examples_data, get_examples_list } from '$lib/server/examples/get-examples';
 import { error, json } from '@sveltejs/kit';
+import examples_data from './examples-data.js';
 
 export const prerender = 'auto';
 
@@ -39,8 +40,6 @@ export async function GET({ params }) {
 	// We prerender examples pages during build time. That means, when something like `/repl/hello-world.json`
 	// is accessed, this function won't be run at all, as it will be served from the filesystem
 
-	try {
-		const examples_data = get_examples_data();
 	examples = new Set(
 		get_examples_list(examples_data)
 			.map((category) => category.examples)
@@ -59,9 +58,6 @@ export async function GET({ params }) {
 			components: munge(example.files),
 		});
 	}
-	} catch (e) {
-		console.warn('Cant use filesystem');
-	}
 
 	if (dev && !client) {
 		// in dev with no local Supabase configured, proxy to production