React Expert

Use when implementing React 19.2 patterns — use(), useOptimistic, useActionState, useEffectEvent, Activity component, React Compiler.

Use when implementing translations in a React app (not Next.js) with react-i18next — useTranslation, namespaces, pluralization, Suspense.

Use when building type-safe forms in React with TanStack Form v1 — Zod/Yup/Valibot validation, async validation, field arrays.

Zustand v5 state management for React. Use when implementing global state, stores, persist, or client-side state.

Use when applying SOLID principles to React architecture — file-size limits, hook separation, src/interfaces/, JSDoc.

shadcn/ui for React with TanStack Form. Use when building UI components, forms, dialogs, tables, toasts, or accessible components.

Testing Library for React 19 - render, screen, userEvent, waitFor, Suspense. Use when writing tests for React components with Vitest.

Use when implementing routing in a React app (NOT Next.js) with TanStack Router — file-based routes, loaders, search params.