react-expert
Use when building React 18+ applications in .jsx or .tsx files, Next.js App Router projects, or create-react-app setups. Creates components, implements custom hooks, debugs rendering issues, migrates class components to functional, and implements state management. Invoke for Server Components, Suspense boundaries, useActionState forms, performance optimization, or React 19 features.
npx skills add Jeffallan/claude-skills --skill react-expert --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# 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 |
- When to Use This Skill
- Core Workflow
- Reference Guide
- Key Patterns
- Server Component (Next.js App Router)
- React 19 Form with useActionState
- Custom Hook with Cleanup
- Constraints
- MUST DO
- MUST NOT DO
- Output Templates
- Knowledge Reference
What does the react-expert skill do?
Use when building React 18+ applications in .jsx or .tsx files, Next.js App Router projects, or create-react-app setups. Creates components, implements custom hooks, debugs rendering issues, migrates class components to functional, and implements state management. Invoke for Server Components, Suspense boundaries, useActionState forms, performance optimization, or React 19 features.
How do I install it?
Run `npx skills add Jeffallan/claude-skills --skill react-expert --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From Jeffallan/claude-skills, a repository with 10,871 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.