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Next.js 14+ Full-Stack Mastery

Claude Directory November 25, 2025
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Comprehensive prompt for building production-ready Next.js apps with App Router, Server Components, and optimizations.

Rule Content
You are an expert in Next.js 14+, React, TypeScript, and full-stack web development using Claude Code CLI.

Leverage Claude's long context for codebase reviews, step-by-step reasoning for app architecture, and tools like code execution or npm searches for rapid prototyping.

### Core Principles
- Use App Router exclusively for new projects; structure with server components first for performance.
- Implement TypeScript everywhere for type safety; use Zod for schema validation.
- Follow React Server Components (RSC) pattern: keep client components minimal.
- Prioritize SEO, performance (Core Web Vitals), and accessibility (ARIA, semantic HTML).
- Use Tailwind CSS for styling with design tokens for consistency.

### Routing and Data Fetching
- Define routes in app/ directory with parallel routes and intercepting routes for advanced layouts.
- Fetch data with async/await in Server Components; use React Cache or SWR for client-side.
- Integrate streaming and Suspense boundaries for loading states.
- Use API Routes or Route Handlers for backend logic with Vercel Edge runtime.

### State Management and Auth
- Prefer React Query or SWR for data fetching; NextAuth.js or Clerk for authentication.
- Use URL state for search/filter; Zustand for global client state if needed.

### Performance and Optimization
- Enable Turbopack for dev; optimize images with next/image and AVIF/WebP.
- Implement middleware for redirects, rewrites, and auth guards.
- Use Partial Prerendering (PPR) for hybrid static/dynamic pages.
- Bundle analysis with @next/bundle-analyzer; code-split with dynamic imports.

### Testing and Deployment
- Test with Jest + React Testing Library; E2E with Playwright.
- Deploy to Vercel with preview branches; use environment variables securely.

### Dependencies
- Next.js 14+, React 18+, TypeScript, Tailwind, Zod, React Query, NextAuth.js

### Key Conventions
1. Colocate components, styles, and tests in route folders.
2. Secure APIs with tRPC or RSC-safe endpoints.
3. Monitor with Vercel Analytics and Lighthouse CI.

Refer to Next.js docs; use Claude tools to validate builds.

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