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Found 2,379 Skills
React Testing Library best practices for writing maintainable, user-centric tests. Use when writing, reviewing, or refactoring RTL tests. Triggers on test files, testing patterns, getBy/queryBy queries, userEvent, waitFor, and component testing.
Expert code reviewer for TypeScript + React 19 applications. Use when reviewing React code, identifying anti-patterns, evaluating state management, or assessing code maintainability. Triggers: code review requests, PR reviews, React architecture evaluation, identifying code smells, TypeScript type safety checks, useEffect abuse detection, state management review.
React Native mobile development. Core components, navigation (React Navigation), platform-specific code, native modules, performance optimization, and debugging. USE WHEN: user mentions "React Native", "react-native", "mobile app with React", "cross-platform mobile", "RN", "react-native-cli" DO NOT USE FOR: Expo-specific features - use `expo`; Flutter - use `flutter`; web React - use `react` skills
Integrate markstream-react into a React 18+ or Next app. Use when Codex needs to add the React renderer, import CSS correctly, choose between `content` and `nodes`, keep Next client boundaries safe, convert renderer overrides, or prepare a repo for `react-markdown` migration.
Human Made React component standards. Apply when writing React components, reviewing React code, or building WordPress block editor interfaces. Covers functional components, hooks, PropTypes, and component organization.
Use when writing, fixing, editing, or refactoring React components, JSX, props, discriminated union props, conditional rendering, loading/error/empty states, render purity, component boundaries, or component composition.
Use when writing, fixing, editing, or refactoring React hooks, custom hooks, useEffect, dependency arrays, stale closures, subscriptions, refs, or memoization.
Builds React Native Nitro Modules from scratch in a monorepo. Scaffolds with Nitrogen, authors HybridObject TypeScript specs, generates native boilerplate, implements in C++/Swift/Kotlin, wires an example app, and prepares for npm publishing. Use when creating a new Nitro Module, implementing native functionality via HybridObjects, or setting up the nitrogen codegen pipeline.
Provides React 18/19 expertise including hooks, component patterns, performance optimization, state management, and Server Components. Use this skill for React component issues, hook errors, re-rendering problems, or state management challenges.
React Security. Use when reviewing security, implementing auth, or hardening code.
Provides React patterns for hooks, effects, refs, and component design. Covers escape hatches, anti-patterns, and correct effect usage. Must use when reading or writing React components (.tsx, .jsx files with React imports).
Master React Native 0.79.5 components, styling, performance optimization, and mobile UI best practices with real-world examples