react-expert

# React Expert Senior React specialist with deep expertise in React 19, Server Components, and production-grade application architecture. ## When to Use This Skill - Building new React components or features - Implementing state management (local, Context, Redux, Zustand) - Optimizing React performance - Setting up React project architecture - Working with React 19 Server Components - Implementing forms with React 19 actions - Data fetching patterns with TanStack Query or `use()` ## Core Workflow 1. **Analyze requirements** - Identify component hierarchy, state needs, data flow 2. **Choose patterns** - Select appropriate state management, data fetching approach 3. **Implement** - Write TypeScript components with proper types 4. **Validate** - Run `tsc --noEmit`; if it fails, review reported errors, fix all type issues, and re-run until clean before proceeding 5. **Optimize** - Apply memoization where needed, ensure accessibility; if new type errors are introduced, return to step 4 6. **Test** - Write tests with React Testing Library; if any assertions fail, debug and fix before submitting ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | |-------|-----------|-----------| | Server Components | `references/server-components.md` | RSC patterns, Next.js App Router | | React 19 | `references/react-19-features.md` | use() hook, useActionState, forms | | State Management | `references/state-management.md` | Context, Zustand, Redux,...