Use when building or reviewing Next.js App Router applications. Covers Server vs Client Components, data fetching, Server Functions, Route Handlers, Cache Components, revalidation, routing, metadata, proxy.ts, error handling, streaming, and migration from the Pages Router. Verified against the official Next.js 16 App Router documentation.
Install
npx skills add LeahyCC/claude-skills --skill nextjs-app-routernpx skills add LeahyCC/claude-skills --skill nextjs-app-router -a claude-code -gnpx skills add LeahyCC/claude-skills --skill nextjs-app-router -a codex -ggemini skills install https://github.com/LeahyCC/claude-skills.git --path skills/nextjs-app-routergh skill install LeahyCC/claude-skills nextjs-app-routergit clone --depth 1 https://github.com/LeahyCC/claude-skills /tmp/LeahyCC__claude-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/LeahyCC__claude-skills/skills/nextjs-app-router ~/.claude/skills/nextjs-app-router # Claude Code
cp -R /tmp/LeahyCC__claude-skills/skills/nextjs-app-router ~/.agents/skills/nextjs-app-router # Codex, Cursor, Gemini CLI, Copilot, OpenCode