next-best-practiceslisted

# Next.js Best Practices Apply these rules when writing or reviewing Next.js code. ## File Conventions See [file-conventions.md](./file-conventions.md) for: - Project structure and special files - Route segments (dynamic, catch-all, groups) - Parallel and intercepting routes - Middleware rename in v16 (middleware → proxy) ## RSC Boundaries Detect invalid React Server Component patterns. See [rsc-boundaries.md](./rsc-boundaries.md) for: - Async client component detection (invalid) - Non-serializable props detection - Server Action exceptions ## Async Patterns Next.js 15+ async API changes. See [async-patterns.md](./async-patterns.md) for: - Async `params` and `searchParams` - Async `cookies()` and `headers()` - Migration codemod ## Runtime Selection See [runtime-selection.md](./runtime-selection.md) for: - Default to Node.js runtime - When Edge runtime is appropriate ## Directives See [directives.md](./directives.md) for: - `'use client'`, `'use server'` (React) - `'use cache'` (Next.js) ## Functions See [functions.md](./functions.md) for: - Navigation hooks: `useRouter`, `usePathname`, `useSearchParams`, `useParams` - Server functions: `cookies`, `headers`, `draftMode`, `after` - Generate functions: `generateStaticParams`, `generateMetadata` ## Error Handling See [error-handling.md](./error-handling.md) for: - `error.tsx`, `global-error.tsx`, `not-found.tsx` - `redirect`, `permanentRedirect`, `notFound` - `forbidden`, `unauthorized` (auth errors) - `unstable_