AI Coding Skills for React

Frontend development skill for React, Next.js, TypeScript, and Tailwind CSS applications. Use when building React components, optimizing Next.js performance, analyzing bundle sizes, scaffolding frontend projects, implementing accessibility, or reviewing frontend code quality.

AI-powered web performance auditor for frontend and web developers. Use it to audit a website or web app, diagnose poor Core Web Vitals (LCP, CLS, INP) and low Lighthouse scores, review JavaScript bundle size, code splitting, lazy loading, image and font loading, hydration, React rendering, Next.js/Nuxt patterns, network waterfalls, third-party scripts, and caching. Produces a prioritized, senior-engineer performance audit with a score and concrete fixes.

Migrates React projects and components from Radix UI to Base UI. Use when asked to migrate from radix, move to base-ui, convert radix primitives, or switch a shadcn project's base library. Handles single components ("migrate accordion") and whole projects.

Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.

Builds a production-ready Next.js 15 app with App Router, Server Components, authentication, Prisma database, and a full dashboard UI from a description or brief. Triggers on: "next.js app", "nextjs app", "build a web app", "saas dashboard", "build a dashboard", "next.js project", "scaffold nextjs", "react web app with backend", "full-stack web app", "admin panel", "create a next app", "build a saas", "web application", "nextjs starter".

GitHub Actions workflow patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts. Use when setting up CI build pipelines or downloading GitHub Actions artifacts via gh CLI and GitHub API.

Automated WCAG 2.1 AA accessibility testing with axe-core and Lighthouse CI. Auto-detects frontend framework (React, Next.js, Vue, Angular, Svelte, Astro, Flutter, React Native), discovers all routes and interactive components, installs Playwright + axe-core for page-level scanning and jest-axe/vitest-axe for component-level testing. Generates tests for color contrast (4.5:1), alt text, form labels, ARIA attributes, heading order, landmark regions, focus visibility, keyboard navigation (tab order, focus traps, modal focus management, skip-to-content), screen reader compatibility (aria-live regions, error announcements, toast notifications), and Flutter Semantics validation (48dp touch targets, semanticLabel). Reports violations by severity (critical, serious, moderate, minor) with WCAG criterion references. Use when adding a11y testing, auditing accessibility compliance, fixing contrast issues, or validating keyboard and screen reader support.

Generates unit tests, integration tests, and E2E tests for React/Next.js applications. Scans components to create Jest + React Testing Library test stubs, analyzes Istanbul/LCOV coverage reports to surface gaps, scaffolds Playwright test files from Next.js routes, mocks API calls with MSW, creates test fixtures, and configures test runners. Use when the user asks to "generate tests", "write unit tests", "analyze test coverage", "scaffold E2E tests", "set up Playwright", "configure Jest", "implement testing patterns", or "improve test quality".

Query 14+ biomedical databases for drug repurposing, target discovery, clinical trials, and literature research. Access ChEMBL, PubMed, ClinicalTrials.gov, OpenTargets, OpenFDA, OMIM, Reactome, KEGG, UniProt, and more through a unified MCP endpoint. Use when researching disease targets, finding approved/investigational drugs, searching clinical evidence, discovering genetic associations, or analyzing compound bioactivity data.

Audit mobile apps against OWASP Mobile Top 10 (M1-M10): credential hardcoding, supply chain dependencies, insecure auth/token storage (Keychain/Keystore), input validation (deep links, WebView XSS), certificate pinning (OkHttp, TrustKit, Alamofire), privacy (PII in logs, clipboard, screenshots), binary protections (ProGuard/R8, obfuscation, anti-tampering), security misconfiguration (backup, exported components, permissions), data-at-rest encryption (SQLCipher, EncryptedSharedPreferences), root/jailbreak detection, and biometric authentication. Supports Flutter, React Native, native iOS, and native Android. Use when auditing mobile app security posture before release or pentest.

Scrapes posts from any public Facebook Page timeline, returning structured data including post text, author info, engagement metrics (likes/comments/shares), reaction breakdowns (like/love/haha/wow/sad/angry/care), hashtags and external links, and media type. Use when user wants to scrape Facebook posts, extract Facebook page content, get Facebook post data, collect Facebook engagement stats, download Facebook posts, monitor a Facebook page, crawl Facebook timeline, get Facebook reactions, get like count/comment count/share count from Facebook, Facebook post bulk export, Facebook social media analytics. Supports date range filtering (afterTime/beforeTime) and cursor-based pagination for bulk collection.

Generates professional app icons and applies them to any project. Triggers on mentions of icon, logo, branding, launcher icon, favicon, app icon, PWA icon, splash icon, or store listing graphics. Supports Flutter, React Native, native iOS/Android, web apps, Electron, macOS, and Windows.

Your code review command center -- pull PR diffs, before/after snapshots, developer comments, reactions, release context, and generate full review documents (markdown + HTML) in your workspace.

Builds a production-ready React Native mobile app from designs, screenshots, or descriptions using Expo, typed navigation, TanStack Query, and full screen implementations. Triggers on: "react native app", "build a mobile app", "expo app", "cross-platform mobile app", "react native project", "build an app with expo", "mobile app from design", "rn app", "scaffold react native", "build ios and android app", "mobile app from screenshots", "create a mobile app", "react native starter".

Provides React Native performance optimization guidelines for FPS, TTI, bundle size, memory leaks, re-renders, and animations. Applies to tasks involving Hermes optimization, JS thread blocking, bridge overhead, FlashList, native modules, or debugging jank and frame drops.

React and Next.js performance optimization guidelines from Vercel Engineering. Use when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements. Do NOT use for component API architecture or composition patterns (use react-composition-patterns instead).

Set up mobile CI/CD pipelines for Flutter, React Native, or native iOS/Android — GitHub Actions workflows for testing, code signing, TestFlight/Play Store distribution, build number management, Fastlane integration, and artifact retention

Guidelines for using TanStack Query (React Query) for server state management, data fetching, caching, and synchronization