frontend▌

Design production UIs in Pencil and generate clean code from design files. \n \n Enforces design system reuse, variable-driven styling, and layout correctness to prevent inconsistent, unmaintainable designs \n Supports design-to-code workflows for React, Next.js, Vue, Svelte, and HTML/CSS with Tailwind v4 semantic classes and shadcn/ui component mapping \n Requires visual verification after each section via screenshots and layout snapshots to catch overflow, alignment, and spacing issues before

Unified design skill: brand, tokens, UI, logo, CIP, slides, banners, social photos, icons.

Create effective visual communication through research-backed design principles.

You are an expert in React Query, TypeScript, and React development. React Query (now TanStack Query) simplifies data fetching logic with built-in caching, background updates, and stale data management.

Use this skill to navigate a locally synced Tailwind CSS v4 documentation snapshot and answer development, configuration, and migration questions with official guidance.

Multi-component React artifacts for Claude with bundling, state management, and shadcn/ui component library. \n \n Scaffolds React 18 + TypeScript projects with Vite, Tailwind CSS, and 40+ pre-installed shadcn/ui components via automated initialization script \n Bundles complete artifacts into single self-contained HTML files with inlined assets, ready for Claude artifact display \n Includes design guidance to avoid common \"AI slop\" patterns like excessive centering, purple gradients, and unif

Native iOS interface design aligned with Apple's Human Interface Guidelines and platform conventions. \n \n Covers eight core design areas: layout and safe areas, typography with Dynamic Type, semantic colors and Dark Mode, native navigation patterns, system controls, accessibility (VoiceOver, contrast, touch targets), SF Symbols, and standard gestures with haptic feedback \n Includes scoring framework (0-10) for auditing iOS interface adherence, common mistakes table, and quick diagnostic check

This skill provides structured, comprehensive code review for React applications. It evaluates code against React 19 best practices, component architecture patterns, hook usage, accessibility standards, and production-readiness criteria. The review produces actionable findings categorized by severity (Critical, Warning, Suggestion) with concrete code examples for improvements.

Fundamental design principles for writing maintainable, testable Python code. \n \n Covers five core patterns: KISS (Keep It Simple), Single Responsibility Principle, Separation of Concerns, Composition Over Inheritance, and the Rule of Three \n Includes practical code examples contrasting anti-patterns with recommended approaches for each principle \n Provides layered architecture guidance (API, Service, Repository layers) with dependency injection patterns for testability \n Emphasizes explici

RESTful API design guidance covering resource modeling, HTTP methods, status codes, versioning, and documentation. \n \n Covers resource naming conventions, HTTP method usage, query parameters, response formats, and status code selection with clear do's and don'ts \n Includes reference guides for OpenAPI documentation, request/response examples, API versioning, authentication, rate limiting, and a complete Express.js implementation example \n Emphasizes consistency through plural resource names,