Build and refactor UI in this repo using Chakra UI v2 + Emotion and the repo theme (`app/theme.ts`). Use for Chakra component usage, responsive layout, a11y, theme tokens/semanticTokens, component variants, and UI polish.
Best practices for React 19 and Next.js 16 App Router. Use when creating components, hooks, or pages. Enforces server-first rendering, proper client boundaries, and modern React patterns.
Generate Leaf templates (Views) for FOSMVVM WebApps. Use when creating HTML views that render ViewModels - both full-page templates and fragments for HTML-over-the-wire updates.
UI component library reference for Composable Svelte. Use when implementing designs, choosing components, styling layouts, or working with shadcn-svelte components. Covers component props, variants, accessibility patterns, visual composition, and when to use which component. For specialized components see composable-svelte-graphics (3D), composable-svelte-code (editors/media), composable-svelte-charts (visualization), composable-svelte-maps (geospatial).
Complete design system reference for full-stack applications. Covers colors, typography, spacing, component patterns (shadcn/ui), effects, GPU-accelerated animations, and WCAG AA accessibility. Use when implementing UI, choosing colors, applying spacing, creating components, or ensuring brand consistency.
Enforces functional TypeScript patterns with Effect ecosystem. Use when (1) writing TypeScript functions or modules, (2) defining types or schemas, (3) handling errors or async operations, (4) structuring files with section separators, or (5) creating factories, dispatch tables, or Effect pipelines.
Modern React patterns and principles. Hooks, composition, performance, TypeScript best practices.
Frontend component and UI development standards for modern React/Next.js applications. Includes React 19 patterns, Tailwind CSS v4, Server Components, accessibility, and the Anthropic frontend-design aesthetic philosophy.
[Design System] Validate UI component usage against design system specifications. Use when (1) checking component variants/sizes are valid, (2) verifying required props are present, (3) detecting deprecated component usage, (4) finding disallowed prop combinations, (5) user asks to 'check component usage', 'validate variants', 'audit design system compliance', or 'find component inconsistencies'.
Enforces project caching conventions when implementing cache layers using React cache(), Next.js unstable_cache, Upstash Redis, and Cloudinary. This skill ensures consistent patterns for cache keys, tags, TTL configuration, cache invalidation, and domain-specific CacheService helpers.
Zustand patterns for predictable client-side state management
Reusable component patterns for Maud including the Render trait, function components, parameterized components, layout composition, partials, and component organization. Use when building reusable UI elements, creating component libraries, structuring templates, or implementing design systems with type-safe components.
Comprehensive testing guidelines for React 19 applications with TypeScript
Local Next.js documentation reference (canary branch). Use when asked about Next.js features, App Router, Server Components, routing, data fetching, rendering, caching, styling, optimizations, configuration, or Next.js APIs.
Generate FOSMVVM Form Specifications (Fields protocols) with validation and localization. Use when defining user input contracts for forms, request bodies, or any ValidatableModel.
Tailwind CSS v4 principles. CSS-first configuration, container queries, modern patterns, design token architecture.
Master React Native fundamentals - components, styling, layout, and Expo
Use when implementing state management with PlatformVmStore for complex components requiring reactive state, effects, and selectors.
Modern frontend development with Next.js 14, React 18, TailwindCSS, and TanStack Query. Use when building UI components, implementing pages, optimizing performance, or following Next.js App Router patterns.
Frontend development guidelines for Angular 19/TypeScript applications. Covers NG-ZORRO components, RxJS state management, auto-generated API clients, LESS styling with themes, feature-based organization, decorators, and performance optimization. Use when creating components, services, features, styling, routing, or working with frontend code.
[Extends frontend-developer] Angular 21 specialist. Use for Angular-specific features: Signals, zoneless change detection, NgRx SignalStore, standalone components, Signal Forms, Angular Aria. Invoke alongside frontend-developer for Angular projects.
