> browse/registry

> ag-ui

You are an expert in AG-UI (Agent-User Interaction Protocol), the open standard by CopilotKit for connecting AI agents to frontend UIs. You help developers stream agent actions, tool calls, state updates, and text generation to React components in real-time — enabling rich agent UIs where users see what the agent is thinking, doing, and can intervene at any step.

> lighthouse-ci

Automate Lighthouse audits in CI with Lighthouse CI. Use when a user asks to track Core Web Vitals, prevent performance regressions, audit accessibility in CI, or set performance budgets for web apps.

> nativewind

Use Tailwind CSS in React Native with NativeWind — write className instead of StyleSheet. Use when someone asks to "use Tailwind in React Native", "NativeWind", "style React Native with Tailwind", "className in React Native", or "utility-first styling for mobile". Covers setup, responsive design, dark mode, animations, and platform-specific styles.

> strapi

You are an expert in Strapi, the leading open-source headless CMS built with Node.js. You help teams build content APIs using Strapi's admin panel for content modeling, role-based access control, media library, and plugin system — with auto-generated REST and GraphQL APIs that power websites, mobile apps, and any frontend through a clean content management interface that non-technical editors can use.

> testing-library

Test UI components the way users interact with them using Testing Library — query by role, text, and label instead of implementation details. Use when someone asks to "test React components", "Testing Library", "user-centric testing", "test accessibility", "test without implementation details", or "render and query components in tests". Covers React Testing Library, queries, user events, async testing, and accessibility assertions.

> wagmi

Build React dApps with wagmi and viem. Use when a user asks to connect wallets in React, read blockchain data in components, send transactions from a frontend, or build a Web3 user interface.

> tauri

Assists with building lightweight cross-platform desktop (and mobile) applications using Tauri. Use when creating small, fast, secure apps with a web frontend and Rust backend that use the system webview instead of bundling Chromium. Trigger words: tauri, rust desktop, system webview, tauri commands, tauri plugins.

> accessibility-auditor

Audit web pages and components for WCAG 2.2 accessibility compliance. Use when a user asks to check accessibility, find a11y issues, audit for WCAG compliance, fix screen reader problems, check color contrast, ensure keyboard navigation works, or prepare for accessibility regulations like the European Accessibility Act or ADA.

> pyside6-ui-engineer

Design, implement, refactor, and review PySide6 desktop applications with strong widget architecture, signal-slot design, state flow, and expert UI/UX logic. Use when building or fixing Qt for Python windows, dialogs, forms, navigation shells, model-view tables, theming, validation, accessibility, or interaction polish in Python GUI code.

> wails

Expert guidance for Wails, the Go framework for building desktop applications with web frontends. Helps developers build lightweight, fast desktop apps where the backend is Go and the frontend is any web framework (React, Vue, Svelte), communicating through auto-generated TypeScript bindings.

> xano

Expert guidance for Xano, the no-code/low-code backend platform for building APIs, databases, and authentication without writing server code. Helps developers and non-technical builders create production-ready REST APIs with visual function stacks, manage data models, and integrate with frontend frameworks.

> tailwindcss

You are an expert in Tailwind CSS v4, the utility-first CSS framework. You help developers build custom designs directly in HTML/JSX with utility classes for layout, spacing, typography, colors, animations, and responsive design — without writing custom CSS, producing smaller bundles via automatic tree-shaking, and maintaining consistency through a design token system.

> streamlit

Expert guidance for Streamlit, the Python framework for building interactive data applications and dashboards. Helps developers create web apps for data exploration, ML model demos, and internal tools using pure Python — no frontend skills required.

> winui-app

Bootstrap, develop, and design modern WinUI 3 desktop applications with C# and the Windows App SDK using official Microsoft guidance, WinUI Gallery patterns, Windows App SDK samples, and CommunityToolkit components. Use when creating a brand new app, preparing a machine for WinUI, reviewing, refactoring, planning, troubleshooting, environment-checking, or setting up WinUI 3 XAML, controls, navigation, windowing, theming, accessibility, responsiveness, performance, deployment, or related Windows

> frontend-design-masterclass

Builds distinctive frontend UI with SvelteKit/Bun/Hono. Triggers on: web pages, dashboards, landing pages, apps, artifacts, styling, theming, fonts, animations, charts, dark/light modes.

> vue

Vue.js is a progressive JavaScript framework for building user interfaces. It features the Composition API with reactive refs and computed values, single-file components, and an approachable learning curve with powerful scaling capabilities.

> bolt

You are an expert in Bolt.new by StackBlitz, the AI-powered full-stack development environment that runs entirely in the browser. You help developers go from idea to deployed app in minutes using natural language prompts — Bolt generates complete applications with frontend, backend, database, and deployment, all running in a WebContainer without local setup.

> ethers-js

Interact with Ethereum and EVM blockchains using ethers.js. Use when a user asks to connect to Ethereum, read blockchain data, send transactions, interact with smart contracts, or build a dApp frontend.

> artifacts-builder

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.

> audit

Perform comprehensive audit of interface quality across accessibility, performance, theming, and responsive design. Generates detailed report of issues with severity ratings and recommendations.