chore: upgrade to Astro 6

astro.config.ts

@@ -8,14 +8,16 @@ import rehypeSlug from "rehype-slug"
 import rehypeAutolinkHeadings from "rehype-autolink-headings"
 import rehypeWrapAll from "rehype-wrap-all"
 import sitemap from "@astrojs/sitemap"
-import { RehypePlugins } from "@astrojs/markdown-remark"
+import type { RehypePlugins } from "astro"
 import yaml from "@rollup/plugin-yaml"
+import { fileURLToPath } from "node:url"
 import { ccipRedirects } from "./src/config/redirects/ccip"
 import trailingSlashMiddleware from "./src/integrations/trailing-slash-middleware"
 import redirectsJson from "./src/features/redirects/redirects.json"
 import tailwindcss from "tailwindcss"
 import autoprefixer from "autoprefixer"
 import { extractCanonicalUrlsWithLanguageVariants } from "./src/utils/sidebar"
+import { preactModulesMatcher } from "./src/utils/preactModules"
 import { isSunsetDocsPath, SUNSET_PAGES_STAY_IN_SITEMAP } from "./src/config/sunset"
 import remarkCodeFenceFilename from "./src/lib/markdown/remarkCodeFenceFilename"
 import remarkCodeFenceLanguageAlias from "./src/lib/markdown/remarkCodeFenceLanguageAlias"
@@ -41,6 +43,9 @@ const redirectSources = new Set(
 // Only the actual content pages (-go, -ts) are indexed
 const canonicalUrlsWithLanguageVariants = extractCanonicalUrlsWithLanguageVariants()
 
+// Preact files (`@jsxImportSource preact` pragma) and the barrels that only re-export them; everything else is React
+const preactModules = preactModulesMatcher(fileURLToPath(new URL(".", import.meta.url)))
+
 // https://astro.build/config
 export default defineConfig({
   site: "https://docs.chain.link",
@@ -55,10 +60,11 @@ export default defineConfig({
   integrations: [
     trailingSlashMiddleware(),
     preact({
-      include: ["**/preact/*"],
+      include: [preactModules],
     }),
     react({
-      include: ["**/react/*"],
+      // Also keep node_modules out: a custom `exclude` replaces @vitejs/plugin-react's default node_modules exclusion
+      exclude: [preactModules, /\/node_modules\//],
     }),
     sitemap({
       changefreq: "daily",
@@ -151,26 +157,7 @@ export default defineConfig({
   output: "static",
   adapter: vercel(),
   vite: {
-    plugins: [
-      yaml(),
-      // Dev-only workaround for slow `astro dev`: @chainlink/blocks ships raw TS whose root entry
-      // re-exports ~3,700 icon modules, and Astro's dev server crawls the whole module graph on every request.
-      // Pre-bundling blocks for SSR collapses it into a single module. Remove once blocks ships a built package.
-      {
-        name: "dev-prebundle-chainlink-blocks",
-        apply: "serve",
-        config: () => ({
-          ssr: {
-            noExternal: ["@chainlink/blocks"],
-            optimizeDeps: {
-              include: ["@chainlink/blocks"],
-              exclude: ["react", "react-dom"], // keep a single React instance (react-dom/server stays external)
-              esbuildOptions: { jsx: "automatic" }, // blocks relies on the automatic JSX runtime
-            },
-          },
-        }),
-      },
-    ],
+    plugins: [yaml()],
     build: {
       target: "esnext", // Use latest ES features, no transpilation for modern browsers
       // Optimize CSS delivery
@@ -195,7 +182,4 @@ export default defineConfig({
       },
     },
   },
-  legacy: {
-    collections: false,
-  },
 })