nextjs-middleware
1When you need to run code before a request completes: auth checks, redirects, headers, A/B testing. **Version Context**: Next.js 16.0+ uses `proxy.ts` (replaces `middleware.ts` from v15 and earlier).
nextjs
middleware
Also installable via skills CLI
npx skills add CoderMariusz/MonoPilot/.claude/skills/nextjs-middleware