nextjs-master

Comprehensive Next.js 15 expertise system covering App Router, Server Components, Server Actions, caching, middleware, authentication, and deployment. PROACTIVELY activate for: (1) ANY Next.js task, (2) App Router (layouts, pages, loading, error), (3) Server Components and Client Components, (4) Server Actions for mutations, (5) Data fetching and caching strategies, (6) Route Handlers (API routes), (7) Middleware for auth/i18n/redirects, (8) Dynamic and parallel routes, (9) Authentication with NextAuth.js, (10) Deployment (Vercel, Docker, static export). Provides: Next.js 15 complete features, App Router file conventions, Server/Client Component patterns, Server Actions with useActionState, caching (Data Cache, Full Route Cache, Router Cache), revalidatePath/revalidateTag, middleware patterns, advanced routing (parallel, intercepting), NextAuth.js authentication, deployment strategies.