Frontend & Design for Claude Code

Canonical repo-local DESIGN.md workflow for product, UI/UX, and frontend decision source of truth

Deprecated compatibility shim for frontend UI/UX work; use $design or $visual-ralph

Visual Ralph orchestration for frontend UI from generated references, static references, or live URL targets, using $ralph with built-in visual verdict and pixel-diff evidence until the implementation matches and leaves a reproducible design system.

2D game development principles. Sprites, tilemaps, physics, camera.

3D game development principles. Rendering, shaders, physics, cameras.

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.

Audit and improve web accessibility following WCAG 2.1 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen reader support", "keyboard navigation", or "make accessible".

Expert assistant for web accessibility (WCAG 2.1/2.2), inclusive UX, and a11y testing

Web accessibility specialist for WCAG compliance, ARIA implementation, and inclusive design. Use when auditing websites for accessibility issues, implementing WCAG 2.1 AA/AAA standards, testing with screen readers, or ensuring ADA compliance. Expert in semantic HTML, keyboard navigation, and assistive technology compatibility.

Use this agent when you need comprehensive accessibility testing, WCAG compliance verification, or assessment of assistive technology support. Specifically:\\n\\n<example>\\nContext: A web application is preparing for launch and needs to ensure compliance with accessibility standards before release.\\nuser: \"Can you test our web app for accessibility issues? We need to know if it works with screen readers and keyboard navigation, and if we meet WCAG standards.\"\\nassistant: \"I'll conduct a co

Use this agent when conducting comprehensive accessibility audits, WCAG 2.2 compliance assessments, or evaluating UI components and full codebases for barriers that affect users with disabilities. Invoke when you need structured findings mapped to specific WCAG criteria, hybrid automated-plus-manual coverage, and actionable remediation guidance aligned with ADA, Section 508, and the European Accessibility Act (EAA, effective June 2025).\n\n<example>\nContext: A product team is shipping a redesig

Expert assistant for developing AEM components using HTL, Tailwind CSS, and Figma-to-code workflows with design system integration

Expert patterns for Algolia search implementation, indexing strategies, React InstantSearch, and relevance tuning Use when: adding search to, algolia, instantsearch, search api, search functionality.

Modern Angular (v20+) expert with deep knowledge of Signals, Standalone Components, Zoneless applications, SSR/Hydration, and reactive patterns.

Use when architecting enterprise Angular 15+ applications with complex state management, optimizing RxJS patterns, designing micro-frontend systems, or solving performance and scalability challenges in large codebases. Specifically:\n\n<example>\nContext: Large-scale Angular application with 200+ components experiencing performance degradation, memory leaks in RxJS observables, and difficult state management with Redux\nuser: \"Our Angular dashboard has grown to 200+ components, pages load slowl

Specialist in creating ASCII mockups for UI concepts, generating multiple visualization options for layouts, forms, dashboards, and interfaces before implementation

Build content-focused websites with Astro — zero JS by default, islands architecture, multi-framework components, and Markdown/MDX support.

Guidelines for modern Avalonia UI layout using Zafiro.Avalonia, emphasizing shared styles, generic components, and avoiding XAML redundancy.

Optimal ViewModel and Wizard creation patterns for Avalonia using Zafiro and ReactiveUI.

Create API handoff documentation for frontend developers. Use when backend work is complete and needs to be documented for frontend integration, or user says 'create handoff', 'document API', 'frontend handoff', or 'API documentation'.

Expert in building browser extensions that solve real problems - Chrome, Firefox, and cross-browser extensions. Covers extension architecture, manifest v3, content scripts, popup UIs, monetization strategies, and Chrome Web Store publishing. Use when: browser extension, chrome extension, firefox addon, extension, manifest v3.

Use when adding a blog to a Next.js + Sanity site, building a blog section from scratch, integrating Sanity CMS for editorial content, or setting up an SEO-optimized article surface. Triggers on phrases like 'add a blog', 'build the blog', 'create blog section', 'set up blog with Sanity', 'integrate Sanity CMS', 'blog architecture', or any new-blog scoping conversation on a Next.js project.

Expert in building Chrome Extensions using Manifest V3. Covers background scripts, service workers, content scripts, and cross-context communication.

CLI interface design specialist. Use PROACTIVELY to create terminal-inspired user interfaces with modern web technologies. Expert in CLI aesthetics, terminal themes, and command-line UX patterns.

Core component library and design system patterns. Use when building UI, using design tokens, or working with the component library.

Optimize Core Web Vitals (LCP, INP, CLS) for better page experience and search ranking. Use when asked to "improve Core Web Vitals", "fix LCP", "reduce CLS", "optimize INP", "page experience optimization", or "fix layout shifts".

Balance visual design with ATS compatibility for creative roles. Use when the user is in design, art, writing, marketing creative, or any visual/creative field and needs a resume that looks distinctive but still parses.

Creating interactive data visualisations using d3.js. This skill should be used when creating custom charts, graphs, network diagrams, geographic visualisations, or any complex SVG-based data visualisation that requires fine-grained control over visual elements, transitions, or interactions. Use this for bespoke visualisations beyond standard charting libraries, whether in React, Vue, Svelte, vanilla JavaScript, or any other environment.

Replicate the visual style of any website and apply it to your existing codebase. Use this skill whenever the user wants to match a site's design, mirror a UI aesthetic, make their app look like another site, or replicate a specific visual style from a URL. Trigger on phrases like 'make it look like', 'match the design of', 'copy the style from', 'I want my app to look like X', 'mirror this design', 'inspired by [url]', or any time the user points at a website and says they want their frontend t

Create and evolve design systems with design tokens, component architecture, accessibility guidelines, and documentation templates. Ensures consistent, scalable, and accessible UI across products.

Pixel-perfect Figma to React conversion using coderio. Generates production-ready code (TypeScript, Vite, TailwindCSS V4) with high visual fidelity. Features robust error handling, checkpoint recovery, and streamlined execution via helper script.

Render clean blueprint-style SVG diagrams from JSON specs. Use when users ask to draw, sketch, or diagram a request flow, neural net, transformer block, system architecture, state machine, data pipeline, or any node-and-edge technical visual they want as an SVG for docs, READMEs, posts, or slides.

Support development of .NET MAUI cross-platform apps with controls, XAML, handlers, and performance best practices.

Expert Next.js 16 developer specializing in App Router, Server Components, Cache Components, Turbopack, and modern React patterns with TypeScript

Expert React 19.2 frontend engineer specializing in modern hooks, Server Components, Actions, TypeScript, and performance optimization

Turn ideas into fully formed designs and specs through natural collaborative dialogue. Use before implementing new features or making significant changes.

Use when building cross-platform mobile applications with Flutter 3+ that require custom UI implementation, complex state management, native platform integrations, or performance optimization across iOS/Android/Web. Specifically:\\n\\n<example>\\nContext: Building a feature-rich social media app that needs custom animations, platform-specific native features (biometric auth, camera), and 60fps performance on both iOS and Android\\nuser: \"We need a high-performance Flutter app with custom Materi

Frontend development guidelines for React/TypeScript applications. Modern patterns including Suspense, lazy loading, useSuspenseQuery, file organization with features directory, MUI v7 styling, TanStack Router, performance optimization, and TypeScript best practices. Use when creating components, pages, features, fetching data, styling, routing, or working with frontend code.

Use when building complete frontend applications across React, Vue, and Angular frameworks requiring multi-framework expertise and full-stack integration. Specifically:\n\n<example>\nContext: Starting a new React frontend for an e-commerce platform with complex state management and real-time updates\nuser: \"Build a React frontend for product catalog with filtering, cart management, and checkout flow. Need TypeScript, responsive design, and 85% test coverage.\"\nassistant: \"I'll create a scalab

Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.