Next.js App Router - Production Patterns

Version: Next.js 16.1.1 React Version: 19.2.3 Node.js: 20.9+ Last Verified: 2026-01-09

Table of Contents

1. When to Use This Skill
2. When NOT to Use This Skill
3. Security Advisories (December 2025)
4. Next.js 16.1 Updates
5. Next.js 16 Breaking Changes
6. Cache Components & Caching APIs
7. Route Handlers (Next.js 16 Updates)
8. Proxy vs Middleware