react-code

Patterns and conventions for writing and editing React code, including components and hooks. Use this skill whenever writing or reviewing React components, hooks (useEffect, useCallback, useState), event handlers, or component extraction decisions. Also trigger when debugging stale closures, infinite re-renders, or unnecessary re-renders caused by memoization issues, or when deciding whether to add a dependency, reach for a web-platform API (Intl, URL, crypto.randomUUID), or hand-roll a primitive. Also trigger when choosing a React 19 idiom, deciding between forwardRef and ref-as-prop, useContext and use(), or Context.Provider and the Context shorthand; when conditional rendering risks the && numeric-0 leak; or when tempted to reach for React's form Actions (useActionState, useFormStatus, useOptimistic) instead of React Router's form handling.