Every time you open a new Next.js project in Cursor, you spend the first hour correcting outdated patterns. useEffect instead of Server Components. tailwind.config.js that doesn't exist in v4, middleware.ts that's deprecated in Next.js 16, the list goes on. This rules pack fixes that. 15+ rules compatible with Cursor, Claude Code and OpenAI Codex — covering Next.js 16, React 19, Tailwind v4, shadcn/ui, your choice of auth/DB, and more. One command. Four questions. Your AI knows your stack.