React Native patterns for mobile app development with Expo and bare workflow. Trigger: When building mobile apps, working with React Native components, using Expo, React Navigation, or NativeWind.

Orchestrate full-cycle implementation across backend and frontend layers

Help users embed Runway Character avatar calls in React apps using the @runwayml/avatars-react SDK

Scan live job boards and salary databases to find real-time compensation data for any role and location. Use this skill when a user asks "what's the going rate for a senior React engineer in London", "software engineer salary Singapore", "how much do ML engineers make", "what should I be earning as a [role]", "is my salary competitive", "what does [company] pay for [role]", "salary range for [job title] in [city]", or any request to find out what a role pays in a specific market.

Write TypeScript and JavaScript code following modern best practices and coding standards. TRIGGER WHEN: writing or reviewing TypeScript/JavaScript code, including types, generics, async patterns, module boundaries, and style conventions. DO NOT TRIGGER WHEN: the task is framework-specific React performance (use react-development), Node.js build/packaging, or enterprise-grade deep-dive (use mastering-typescript skill).

Deploy frontend and full-stack apps on Vercel with previews, edge functions, environment promotion, and production guardrails. Use when shipping Next.js, SvelteKit, or static sites with zero-config CI/CD.

Apply when building VTEX IO admin-facing React interfaces under the admin builder. Covers VTEX Styleguide and Shoreline usage, admin page composition, data-heavy admin interactions, and keeping administrative interfaces consistent with the VTEX Admin environment. Use for settings pages, moderation tools, dashboards, or operational UIs inside VTEX Admin.

Show how to use custom elements in Vue, including required configuration for the Vue compiler. Use when the user asks to "use in Vue", "Vue custom elements", "custom elements in Vue", "isCustomElement", or mentions "Vue 3", "Vue 2", "Nuxt", or "vue integration".

Web accessibility patterns including semantic HTML, ARIA attributes, and keyboard navigation. PROACTIVELY activate for: (1) using semantic HTML elements correctly, (2) adding ARIA labels for icons and dynamic content, (3) implementing keyboard navigation. Triggers: "accessibility", "a11y", "aria"

Expert in building 3D experiences for the web - Three.js, React Three Fiber, Spline, WebGL, and interactive 3D scenes. Covers product configurators, 3D portfolios, immersive websites, and bringing depth to web experiences. Use when: 3D website, three.js, WebGL, react three fiber, 3D experience.

Guides the user through adding a Tauri splashscreen, splash screen, loading screen, or startup screen to their application. Covers configuration, custom splash HTML, closing the splash when ready, and styling.

Setup Vercel Analytics for Next.js applications with custom event tracking. Use this skill when the user says "setup analytics", "add analytics", "setup vercel analytics", "track events", or "add tracking".

Expo app.config.js patterns, environment variables, and project configuration. Use when setting up dynamic config, environment-specific bundle IDs, or troubleshooting Expo project issues.

Expert guidance for integrating FeatBit JavaScript Client SDK in browser environments. Use when user asks about "JavaScript client SDK", "browser feature flags", "FeatBit JS", "vanilla JS SDK", or mentions browser-side HTML/JS with FeatBit. Do not use for Node.js server-side, React, React Native, .NET, Python, Java, or Go questions.

Expert guidance for integrating FeatBit Python Server SDK in backend applications. Use when user asks about "Python SDK", "Python feature flags", "FeatBit Python", fbclient usage, or mentions .py files, Flask, Django, FastAPI, or scripts with FeatBit. Do not use for Node.js, Java, Go, .NET, React, or any browser/client-side questions.

Frontend development guidelines for React/TypeScript applications. Modern patterns including Suspense, lazy loading, useSuspenseQuery, file organization with features directory, styling best practices, routing, performance optimization, and TypeScript best practices. Use when creating components, pages, features, fetching data, styling, routing, or working with frontend code.

Génère un rapport HTML d'analyse d'impact entre deux branches

Compile Tailwind CSS for Hyvä themes in Magento 2. Use when the user wants to build styles, generate CSS, compile Tailwind, run Tailwind, or create production/development stylesheets for a Hyvä theme. Also use when Tailwind classes are not taking effect or some styles appear missing after template changes — this typically means CSS needs to be recompiled. Triggers include "compile tailwind", "build styles", "generate css", "styles not working", "styles are missing", "styles not applied".

Guides the user through integrating Rust-based WASM frontend frameworks with Tauri v2, covering Leptos and Trunk setup, WASM compilation configuration, Cargo.toml dependencies, Trunk.toml bundler settings, and withGlobalTauri API access.

Master iOS development with Swift, Android development with Kotlin, React Native, Flutter, and cross-platform mobile technologies.

Next.js 15 App Router patterns: Server Components, Server Actions, data fetching, middleware. Trigger: When building Next.js apps, working with app router, server/client components, or API routes.

Compare two or more npm packages side by side using live data — downloads, bundle size, GitHub stars, last update, known vulnerabilities, and community sentiment. Use this skill when a user asks "zustand vs jotai vs redux", "compare react-query and swr", "which state management library should I use", "what's the difference between X and Y", "is X better than Y for my use case", "help me choose between these packages", or any request to compare npm packages or decide between JavaScript libraries.

Teaches Vue's provide/inject API for dependency injection across components. Use when deeply nested components need access to ancestor data without threading props through intermediate layers.

Audit CSS for pseudo-element best practices and View Transitions API usage. Use when reviewing hover effects, decorative layers, or page transitions. Outputs file:line findings.

React Three Fiber asset loading - useGLTF, useLoader, Suspense patterns, preloading. Use when loading 3D models, textures, HDR environments, or managing loading states.

Upgrade React applications to latest versions, migrate from class components to hooks, and adopt concurrent features. Use when modernizing React codebases, migrating to React Hooks, or upgrading to latest React versions.

Upgrade React applications to latest versions, migrate from class components to hooks, and adopt concurrent features. Use when modernizing React codebases, migrating to React Hooks, or upgrading to latest React versions.

Upgrade React applications to latest versions, migrate from class components to hooks, and adopt concurrent features. Use when modernizing React codebases, migrating to React Hooks, or upgrading to latest React versions.

Master modern React state management with Redux Toolkit, Zustand, Jotai, and React Query. Use when setting up global state, managing server state, or choosing between state management solutions.

Master modern React state management with Redux Toolkit, Zustand, Jotai, and React Query. Use when setting up global state, managing server state, or choosing between state management solutions.

Master modern React state management with Redux Toolkit, Zustand, Jotai, and React Query. Use when setting up global state, managing server state, or choosing between state management solutions.

Export quiz markdown to Anki, Flashcard Hero, HTML

Choose and implement React state management solutions including Context, Zustand, Redux Toolkit, TanStack Query, and Jotai. Use when selecting state management, implementing global state, or managing server state in React applications.

Teaches streaming server-side rendering for chunked HTML delivery. Use when you need faster Time to First Byte and First Contentful Paint by streaming HTML as it's generated on the server.

Analyze a codebase to extract its conventions, patterns, and style. Spawns specialized analyzer agents that each focus on one aspect (structure, naming, patterns, testing, frontend). Generates a comprehensive style guide that other skills can reference. Use when starting work on an unfamiliar codebase, or to create explicit documentation of implicit conventions.

Tailwind CSS 4 patterns: semantic classes, cn() utility, dynamic styling, library exceptions. Trigger: When styling with Tailwind, using className, conditional styles, or dark mode.

Initialize warehouse schema discovery. Generates .astro/warehouse.md with all table metadata for instant lookups. Run once per project, refresh when schema changes. Use when user says "/astronomer-data:warehouse-init" or asks to set up data discovery.

Master modern web development. Learn HTML/CSS/JavaScript fundamentals, React/Vue/Angular frameworks, Node.js backend, databases, APIs, and full-stack architectures. Use when building web applications, learning web technologies, or choosing tech stacks.

Zustand 5 state management patterns for React: stores, persistence, selectors, slices. Trigger: When managing global state in React, using Zustand, or implementing state slices.

This skill should be used when the user asks about "React", "React components", "React hooks", "useState", "useEffect", "JSX", "React patterns", "React best practices", or mentions React development.

Review custom element HTML for accessibility issues. Use when the user asks to "review accessibility", "check a11y", "audit accessibility", "find accessibility issues", or mentions "WCAG", "screen reader", "keyboard navigation", or "ARIA" in the context of custom elements.

Integrate Apidog + OpenAPI specifications with your React app. Covers MCP server setup, type generation, and query layer integration. Use when setting up API clients, generating types from OpenAPI, or integrating with Apidog MCP.

Fast linting/formatting for TypeScript/React. Use when setting up linter, migrating from ESLint/Prettier, or running code quality checks.

Build an interactive HTML dashboard with charts, filters, and tables

Guides the user through calling Rust backend functions from the Tauri frontend using the invoke function, defining commands with the

Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.

Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.

Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.

Use when planning new projects, onboarding, or reviewing architectural decisions. Core principles and project structure for React 19 SPA development. Covers stack overview, project organization, agent execution rules, and authoritative sources.

Create interactive Our World In Data style charts using the owid-grapher-py Python library. Use this skill when the user wants to visualize data as charts (line charts, bar charts, scatter plots, maps, etc.) in a Jupyter notebook, standalone HTML, or export charts to PNG/SVG.

Collect CSS rule usage via Chrome DevTools Protocol (CDP) and report per-stylesheet coverage with unused selector analysis.

Create interactive, custom data visualizations using d3.js — including charts, graphs, network diagrams, and geographic maps. Use when you need fine-grained control over visual elements, transitions, or interactions beyond what standard charting libraries offer, in any JavaScript environment (vanilla JS, React, Vue, Svelte, etc.).

Collect test coverage, generate LCOV/HTML reports, and apply coverage ignore directives. Use when measuring test coverage, setting up coverage gates in CI, or generating coverage reports for Dart and Flutter projects.

Audit custom element manifest documentation for completeness and quality. Use when the user asks to "check docs", "audit documentation", "review manifest quality", "find missing descriptions", "docs health", or mentions "undocumented" attributes, slots, events, or CSS properties.

Connect a frontend application (React, Next.js, Vue, Svelte, etc.) to an Encore.ts backend.

Curated typeface catalog with weights, licensing, and CSS snippets for sans-serif fonts (Inter, Roboto, Open Sans, Proxima Nova, Graphik, Futura, Lato, IBM Plex Sans) and serif fonts (Merriweather, EB Garamond, Crimson Pro, Alegreya). Includes font pairing tables and the system font stack. Apply whenever choosing a font-family, setting up CSS font stacks, pairing headline and body typefaces, or deciding between free and commercial fonts for a project.

# Astro Frontmatter Schemas Skill

Guides Claude through configuring JavaScript frontend frameworks for Tauri v2 desktop applications, including Next.js, Nuxt, Qwik, SvelteKit, and Vite with proper SSG setup, tauri.conf.json settings, and framework-specific configurations.

Use when "LangChain", "LLM chains", "ReAct agents", "tool calling", or asking about "RAG pipelines", "conversation memory", "document QA", "agent tools", "LangSmith"

Teaches how to subscribe to and listen for Tauri events in the frontend using the events API, including typed event handlers and cleanup patterns.

Next.js App Router patterns and conventions

React Server Components patterns in Next.js

Identifies and resolves performance bottlenecks across frontend (Core Web Vitals, code splitting, lazy loading), backend (N+1 queries, async processing), and database (EXPLAIN ANALYZE, indexing strategies) layers. Use when the user reports slow code, latency issues, memory leaks, needs to speed up an application, or wants to benchmark and profile performance.

Performance optimization, accessibility, and security best practices for React apps. Covers code-splitting, React Compiler patterns, asset optimization, a11y testing, and security hardening. Use when optimizing performance or reviewing security.

Developing policyengine-app-v2 — the main React frontend for policyengine.org

React 19 patterns with React Compiler. Automatic optimization, Server Components, use() hook. Trigger: When building React components, using hooks, working with forms, or server/client components.

React and Next.js implementation patterns for performance and maintainability. Use when building frontend components, pages, and applications with React ecosystem.

Keep README files in sync with the repo using symbolic HTML comments. Use this skill whenever making a repo change that could affect documentation — code (exported APIs, configuration, examples, CLI commands, dependencies), repo structure (adding/removing/renaming files, directories, packages, or other sibling entries referenced by a listing comment), or metadata (package.json, manifests). Also use when authoring or editing README files to add or update symbolic comments. Trigger on any change — code or structural — that touches a construct referenced by an HTML comment in a markdown file.

Implementing the canonical /readyz readiness-probe contract across Go, TypeScript, and Next.js via a 12-gate cycle: detects stack, audits compliance, then dispatches agents to build the dependency probe, url.Parse TLS detection, ValidateSaaSTLS enforcement, metrics, startup self-probe, and graceful drain, then runs reviewers. Use when a service lacks or has incomplete /readyz. Skip for libraries, CLI tools, or batch jobs.

Teaches static rendering (SSG) for build-time HTML generation. Use when your pages don't change per request and can be pre-rendered at build time for maximum cacheability and performance.

Use when setting up new projects or updating tool configurations. Configures Vite, TypeScript, Biome, and Vitest for React 19 projects. Covers build configuration, strict TypeScript setup, linting/formatting, and testing infrastructure.

TypeScript specialist for strict typing, React/Next.js patterns, schema validation, and type-safe API workflows. Use when implementing or refactoring TypeScript codebases.

ESLint configuration, TypeScript type safety rules, and React-specific linting patterns. PROACTIVELY activate for: (1) Setting up ESLint for TypeScript, (2) Fixing type safety issues, (3) React-specific linting rules, (4) Resolving TypeScript compiler errors, (5) Code review for anti-patterns. Triggers: "eslint", "typescript", "type checking", "refactor", "ts review", "no-explicit-any", "ts-ignore"

Teaches the assistant about Tauri IPC (Inter-Process Communication) patterns including brownfield and isolation approaches for secure message passing between frontend and Rust backend.

This skill should be used when the user asks to "improve test coverage", "add unit tests", "TDD", "test this module", "write tests for", "increase coverage", "/ut command", or discusses unit testing strategies. Covers the unit test loop workflow, React Testing Library best practices, query priorities, and coverage improvement strategies.

Generate a clean white Tailwind CDN report page from user content, optionally password-gate viewing via client-side decryption, and deploy to Originless/IPFS.

Security anti-pattern for Cross-Site Scripting vulnerabilities (CWE-79). Use when generating or reviewing code that renders HTML, handles user input in web pages, uses innerHTML/document.write, or builds dynamic web content. Covers Reflected, Stored, and DOM-based XSS. AI code has 86% XSS failure rate.

OWASP A07 - Cross-Site Scripting (XSS) Prevention. Use this skill when rendering user input in HTML, handling DOM manipulation, or building frontend components. Activate when: XSS, cross-site scripting, user input display, innerHTML, dangerouslySetInnerHTML, template injection, script injection, sanitize HTML, escape output.

MASTER Vue.js application testing with strict enforcement of verification protocols. Systematically test functionality with Playwright, validate bug fixes, verify features work, and enforce zero-tolerance policies for false success claims. MANDATORY testing with visual evidence before any deployment or functionality claims.

View, search, and download academic papers from arXiv. Supports API queries, web scraping via Actionbook, and HTML paper reading via ar5iv. Use when user asks about arxiv papers, academic papers, research papers, paper summaries, latest papers, or wants to search/download/read papers.

Auth0 integration with Next.js

Guides developers through Tauri v2 event system for calling frontend from Rust, covering emit functions, event payloads, IPC channels, and JavaScript evaluation for bi-directional Rust-frontend communication.

Set up cem serve for custom element development. Use when the user asks to "start dev server", "set up cem serve", "preview elements", "run demos", or needs help configuring the dev server, import maps, or CSS transforms.

Create a library-grade Vue composable that accepts maybe-reactive inputs (MaybeRef / MaybeRefOrGetter) so callers can pass a plain value, ref, or getter. Normalize inputs with toValue()/toRef() inside reactive effects (watch/watchEffect) to keep behavior predictable and reactive. Use this skill when user asks for creating adaptable or reusable composables.

Create a library-grade Vue composable that accepts maybe-reactive inputs (MaybeRef / MaybeRefOrGetter) so callers can pass a plain value, ref, or getter. Normalize inputs with toValue()/toRef() inside reactive effects (watch/watchEffect) to keep behavior predictable and reactive. Use this skill when user asks for creating adaptable or reusable composables.

Initialize a new Next.js project with optimal defaults. Use when user says "create next app", "new next project", or "init next".

Expert in Docker, docker-compose, Dockerfile patterns, and container orchestration for NestJS and Next.js applications. Use this skill when users need Docker setup, containerization, or docker-compose configuration.

Security anti-pattern for DOM Clobbering vulnerabilities (CWE-79 variant). Use when generating or reviewing code that accesses DOM elements by ID, uses global variables, or relies on document properties. Detects HTML injection that overwrites JavaScript globals.

Integrate Firecrawl `/scrape` into product code for single-page extraction. Use when an app already has a URL and needs markdown, HTML, links, screenshots, metadata, or structured page output. Prefer this skill over broader crawl patterns when the feature is page-level.

Frontend-specific technical decision criteria, anti-patterns, debugging techniques, and quality check workflow. Use when making frontend technical decisions or performing quality assurance.

Project scaffolding expert for go-symphony. Use when generating or planning a new Gin-based Go project with PostgreSQL, Supabase, SQLC, Docker, GitHub Actions, WebSocket support, or optional SvelteKit/Next.js frontend integration.

Router for GSAP animation domain. Use when implementing animations with GreenSock Animation Platform including tweens, timelines, scroll-based animations, or React integration. Routes to 4 specialized skills for fundamentals, sequencing, ScrollTrigger, and React patterns.

Learn how to implement Firebase Cloud Messaging (FCM) in your Flutter web app with this guide, covering service worker setup, helper methods, and testing to enable push notifications.

TypeScript type safety for Inertia Rails (React, Vue, Svelte): shared props, flash, and errors via InertiaConfig module augmentation in globals.d.ts. Use when setting up TypeScript types, configuring shared props typing, fixing TS2344 or TS2339 errors in Inertia components, or adding new shared data.

Next.js 16 App Router patterns. Trigger: When working in Next.js App Router (app/), Server Components vs Client Components, Server Actions, Route Handlers, proxy.ts, caching/revalidation, Cache Components, and streaming/Suspense.

Data fetching patterns for Next.js 14+ App Router including async Server Components and Server Actions. PROACTIVELY activate for: (1) fetching data in Server Components, (2) implementing Server Actions for mutations, (3) configuring caching and revalidation. Triggers: "fetch data", "server action", "revalidate"