Migrate Next.js to vinext vinext reimplements the Next.js API surface on Vite. Existing app/ , pages/ , and next.config.js work as-is — migration is a package swap, config generation, and ESM conversion. No changes to application code required. FIRST: Verify Next.js Project Confirm next is in dependencies or devDependencies in package.json . If not found, STOP — this skill does not apply. Detect the package manager from the lockfile: Lockfile Manager Install Uninstall pnpm-lock.yaml pnpm pnpm add pnpm remove yarn.lock yarn yarn add yarn remove bun.lockb / bun.lock bun bun add bun remove package-lock.json or none npm npm install npm uninstall Detect the router: if an app/ directory exists at root or under src/ , it's App Router. If only pages/ exists, it's Pages Router. Both can coexist. Quick Reference Command Purpose vinext check Scan project for compatibility issues, produce scored report vinext init Automated migration — installs deps, generates config, converts to ESM vinext dev Development server with HMR vinext build Production build (multi-environment for App Router) vinext start Local production server vinext deploy Build and deploy to Cloudflare Workers Phase 1: Check Compatibility Run vinext check (install vinext first if needed via npx vinext check ). Review the scored report. If critical incompatibilities exist, inform the user before proceeding. See references/compatibility.md for supported/unsupported features and ecosystem library status. Phase 2: Automated Migration (Recommended) Run vinext init . This command: Runs vinext check for a compatibility report Installs vite as a devDependency (and @vitejs/plugin-rsc for App Router) Adds "type": "module" to package.json Renames CJS config files (e.g., postcss.config.js → .cjs ) to avoid ESM conflicts Adds dev:vinext and build:vinext scripts to package.json Generates a minimal vite.config.ts This is non-destructive — the existing Next.js setup continues to work alongside vinext. Use the dev:vinext script to test before fully switching over. If vinext init succeeds, skip to Phase 4 (Verify). If it fails or the user prefers manual control, continue to Phase 3. Phase 3: Manual Migration Use this as a fallback when vinext init doesn't work or the user wants full control. 3a. Replace packages

Example with npm:

npm uninstall next npm install vinext npm install -D vite

App Router only:

npm install -D @vitejs/plugin-rsc 3b. Update scripts Replace all next commands in package.json scripts: Before After Notes next dev vinext dev Dev server with HMR next build vinext build Production build next start vinext start Local production server next lint vinext lint Delegates to eslint/oxlint Preserve flags: next dev --port 3001 → vinext dev --port 3001 . 3c. Convert to ESM Add "type": "module" to package.json. Rename any CJS config files: postcss.config.js → postcss.config.cjs tailwind.config.js → tailwind.config.cjs Any other .js config that uses module.exports 3d. Generate vite.config.ts See references/config-examples.md for config variants per router and deployment target. Pages Router (minimal): import vinext from "vinext" ; import { defineConfig } from "vite" ; export default defineConfig ( { plugins : [ vinext ( ) ] } ) ; App Router (minimal): import vinext from "vinext" ; import { defineConfig } from "vite" ; export default defineConfig ( { plugins : [ vinext ( ) ] } ) ; vinext auto-registers @vitejs/plugin-rsc for App Router when the rsc option is not explicitly false . No manual RSC plugin config needed for local development. Phase 4: Deployment (Optional) Option A: Cloudflare Workers (recommended for Cloudflare) If the user wants to deploy to Cloudflare Workers, use vinext deploy . It auto-generates wrangler.jsonc , worker entry, and Vite config if missing, installs @cloudflare/vite-plugin and wrangler , then builds and deploys. For manual setup or custom worker entries, see references/config-examples.md . Cloudflare Bindings (D1, R2, KV, AI, etc.) To access Cloudflare bindings (D1, R2, KV, AI, Queues, Durable Objects, etc.), use import { env } from "cloudflare:workers" in any server component, route handler, or server action: import { env } from "cloudflare:workers" ; export default async function Page ( ) { const result = await env . DB . prepare ( "SELECT * FROM posts" ) . all ( ) ; return < div

{ JSON . stringify ( result ) } </ div

; } This works because @cloudflare/vite-plugin runs server environments in workerd, where cloudflare:workers is a native module. No custom worker entry, no getPlatformProxy() , no special configuration needed. Just import and use. Bindings must be defined in wrangler.jsonc . For TypeScript types, run wrangler types . IMPORTANT: Do not use getPlatformProxy() , getRequestContext() , or custom worker entries with fetch(request, env) to access bindings. These are older patterns. cloudflare:workers is the recommended approach and works out of the box with vinext. Option B: Other platforms (via Nitro) For deploying to Vercel, Netlify, AWS, Deno Deploy, or any other Nitro-supported platform , add the Nitro Vite plugin: npm install nitro // vite.config.ts import { defineConfig } from "vite" ; import vinext from "vinext" ; import { nitro } from "nitro/vite" ; export default defineConfig ( { plugins : [ vinext ( ) , nitro ( ) ] , } ) ; Build and deploy: NITRO_PRESET = vercel npx vite build

Vercel

NITRO_PRESET

netlify npx vite build

Netlify

NITRO_PRESET

deno_deploy npx vite build

Deno Deploy

NITRO_PRESET

node npx vite build

Node.js server

Nitro auto-detects the platform in most CI/CD environments, so the preset is often unnecessary. Note: For Cloudflare Workers, Nitro works but the native integration ( vinext deploy / @cloudflare/vite-plugin ) is recommended for the best developer experience with cloudflare:workers bindings, KV caching, and one-command deploys. Phase 5: Verify Run vinext dev to start the development server Confirm the server starts without errors Navigate key routes and check functionality Report the result to the user — if errors occur, share full output See references/troubleshooting.md for common migration errors. Known Limitations Feature Status next/image optimization Remote images via @unpic; no build-time optimization next/font/google CDN-loaded, not self-hosted Domain-based i18n Not supported; path-prefix i18n works next/jest Not supported; use Vitest Turbopack/webpack config Ignored; use Vite plugins instead runtime / preferredRegion Route segment configs ignored PPR (Partial Prerendering) Use "use cache" directive instead (Next.js 16 approach) Anti-patterns Do not modify app/ , pages/ , or application code. vinext shims all next/ imports — no import rewrites needed. Do not rewrite next/ imports to vinext/* in application code. Imports like next/image , next/link , next/server resolve automatically. Do not copy webpack/Turbopack config into Vite config. Use Vite-native plugins instead. Do not skip the compatibility check. Run vinext check before migration to surface issues early. Do not remove next.config.js unless replacing it with next.config.ts or .mjs . vinext reads it for redirects, rewrites, headers, basePath, i18n, images, and env config. Do not use getPlatformProxy() or custom worker entries for bindings. Use import { env } from "cloudflare:workers" instead. This is the modern pattern and works out of the box with vinext and @cloudflare/vite-plugin . For Cloudflare Workers, prefer the native integration over Nitro. vinext deploy / @cloudflare/vite-plugin provides the best experience with cloudflare:workers bindings, KV caching, and image optimization. Nitro works for Cloudflare but the native setup is recommended.