frontend-dev-guidelines

Frontend development guidelines for Quantum Skincare's Next.js 16 App Router application with React 19.2, Tailwind CSS v4, Clerk authentication, and TypeScript. Covers Server/Client Components, React 19.2 features (useEffectEvent, Activity component, cache signals, React Compiler auto-optimization), data fetching patterns, Tailwind styling, route groups, form validation, and performance optimization. Use when creating pages, components, API routes, styling, or working with frontend code.