Frontend design assistant for users with zero/low-code background. This skill should be used when users request creating web interfaces, landing pages, dashboards, or any frontend UI; when users ask about frontend terminology, design elements, or architecture concepts; when users want to understand CSS, layout, typography, or color choices. Emphasizes distinctive aesthetics over generic AI-generated designs, teaches concepts in context, and adapts to user skill level (pure HTML/CSS or React/Vue).

Fix generic frontend designs by applying aesthetic upgrades across the 5 design dimensions

Create distinctive, production-grade React/TypeScript frontends with exceptional design quality

Build React components, implement responsive layouts, and handle

Multi-framework frontend development. Frameworks: React 18+ (Suspense, hooks, TanStack), Vue 3 (Composition API, Pinia, Nuxt), Svelte 5 (Runes, SvelteKit), Angular (Signals, standalone). Common: TypeScript, state management, routing, data fetching, performance optimization, component patterns. Actions: create, build, implement, style, optimize, refactor components/pages/features. Keywords: React, Vue, Svelte, Angular, component, TypeScript, hooks, Composition API, runes, signals, useSuspenseQuery, Pinia, stores, state management, routing, lazy loading, Suspense, performance, bundle size, code splitting, reactivity, props, events. Use when: creating components in any framework, building pages, fetching data, implementing routing, state management, optimizing performance, organizing frontend code, choosing between frameworks.

Ultimate 25+ years expert-level frontend skill covering Next.js, React, TypeScript, Tailwind CSS, styled-components, Redux, Zustand, Webpack, Vite, Parcel, Jest/Vitest testing, performance optimization, and ALL security aspects comprehensively (XSS, CSRF, injection, data privacy, CSP, dependency security, etc.). Covers all use cases (SPAs, PWAs, e-commerce, dashboards, real-time apps, mobile-responsive). Advanced features include A11y, Core Web Vitals, SEO, i18n, error handling, monitoring, component architecture, design patterns. Maximum security hardening, genius-level optimization, modernized development standards. Use when building ANY frontend application requiring enterprise security, performance, and scalability.

Feature-Sliced Design architecture specialist

Image sourcing strategy for UI projects. Use FREE resources first - DiceBear/Boring Avatars for avatars, Unsplash/Picsum for photos, unDraw/Storyset for illustrations, Haikei for backgrounds. AI generation (DALL-E) only when custom branded assets needed and no free alternative exists.

Create comprehensive, production-ready frontend implementation plans for any UI screen or feature. Use this skill when documenting how to build UI components, establishing design systems, planning component architecture, or creating technical specifications for frontend development. Works across frameworks (React, Vue, Angular, Svelte, etc.) and focuses on clear structure, reusable patterns, and maintainability.

This skill should be used when identifying and fixing frontend layout issues (clipping, spacing, overflow, RTL text problems) by analyzing DOM and CSS structure and proposing minimal, scoped CSS patches. Triggers on layout bugs, text clipping, overflow issues, spacing problems, and when vanilla Claude cannot pinpoint which CSS selector to modify from a screenshot alone.

Especialista en React 18, TypeScript, Tailwind CSS y conexión con API multi-tenant.

Coordinates frontend development tasks (React, TypeScript, UI/UX). Use when implementing user interfaces, components, state management, or visual features. Applies frontend-standard.md for quality gates.

Visual QA gate for frontend code. ALWAYS use before delivering any UI changes - navigate, screenshot, verify console is error-free. Use for: responsive testing across viewports, form/interaction testing, debugging hydration and render issues. Catches visual bugs before users see them.

Generate structured prompts for frontend development tasks following established patterns. Use when the user requests prompts for wireframes, UI implementation, data binding, or routing functionality in React/Next.js projects with specific formatting requirements (Cursor rules, file paths, test-driven development).

Runs TypeScript type checking, ESLint, and tests for the frontend.

Create safe, phased refactor plans for complex frontend code.

Implement mobile-first responsive designs using fluid layouts, relative units, responsive images, and touch-friendly interfaces. Use this skill when creating layouts that adapt across screen sizes, implementing breakpoints, or optimizing for mobile and tablet devices. When working on responsive component layouts, Tailwind responsive utility classes (sm:, md:, lg:, xl:), CSS media queries and breakpoints, fluid typography with clamp() or viewport units, responsive images with srcset and sizes attributes, mobile navigation menus and hamburger patterns, touch target sizing for mobile devices, responsive grid and flexbox layouts, container queries for component-based responsiveness, or viewport meta tags and mobile optimization.

Implement responsive designs using mobile-first development, fluid layouts, standard breakpoints, and relative units to ensure optimal viewing across all device sizes. Use this skill when creating layouts, implementing breakpoints, styling for different screen sizes, or ensuring mobile compatibility. When working with responsive CSS, media queries, viewport configurations, or mobile-optimized components. When testing across device sizes, implementing touch-friendly interfaces, or optimizing for mobile performance. When working in any frontend file that affects layout, spacing, typography, or visual presentation across different screen sizes.

提供前端开发、UI 实现、移动应用开发和现代前端框架能力。当需要实现用户界面、构建组件或开发移动应用时使用。

Your approach to handling frontend state management. Use this skill when working on files where frontend state management comes into play.

Build stunning component libraries with Storybook mastery. Expert in component documentation, visual testing, and design systems. Activate for UI libraries, component development, or design system creation.

Frontend TDD Agent. React/Next.js 기반 TDD 테스트 작성 및 구현을 담당합니다. 테스트 먼저 작성 후 구현하는 Red-Green-Refactor 사이클을 따릅니다.

테스트 작성 에이전트. 단위/통합/E2E 테스트를 작성합니다.

Senior Frontend QA Engineer with 10+ years JavaScript/TypeScript testing experience. Use when writing unit tests for React components, creating integration tests with React Testing Library, testing custom hooks, mocking APIs, or following TDD for frontend.

Comprehensive frontend testing with Playwright, Cypress, Jest, and React Testing Library. Covers E2E testing, component testing, unit testing, visual regression, and accessibility testing. Use for quality assurance, CI/CD integration, and test automation.

Your approach to handling frontend theming. Use this skill when working on files where frontend theming comes into play.

Implement or extend a user-facing workflow in a web application, integrating with existing backend APIs. Use when the feature is primarily a UI/UX change backed by existing APIs, affects only the web frontend, and requires following design system, routing, and testing conventions.

Creates comprehensive frontend UI/UX designs including user interfaces, design systems, component libraries, responsive layouts, and accessibility implementations. Produces wireframes, mockups, design specifications, and implementation guidelines. Use when designing user interfaces, creating design systems, building component libraries, implementing responsive designs, ensuring accessibility compliance, or when users mention UI design, UX design, interface design, design systems, user experience, or frontend design patterns.

Verify and test Angular 18 frontend changes using Chrome DevTools MCP. Automatically check console errors, network requests, and visual rendering after implementing tasks or when fixing UI bugs. Use when creating components, debugging visual issues, validating API integration, or ensuring UI requirements are met. File types: .ts, .html, .css, .scss

Advanced frontend web development expert system that provides comprehensive modern web development services including architecture design, UI/UX implementation, performance optimization, engineering setup, and cross-platform development through expert collaboration and intelligent tool integration.

You are a seasoned frontend web software engineer with deep expertise in modern

fsharp-feature

fsharp-tests

FTDI (Future Technology Devices International) MPN encoding patterns, USB interface chip decoding, and handler guidance. Use when working with FTDI USB bridge ICs or FTDIHandler.

Autonomous Freedom to Operate analysis agent. Identifies blocking patents, assesses infringement risk, and recommends mitigation strategies for product commercialization.

Read files from remote storage backends (local, FTP, SFTP, S3, Azure). List directories, download files, inspect metadata. Use for reading data from cloud storage, FTP servers, or remote filesystems without making changes.

Analyzes and assists with Fujitsu mainframe systems including FACOM, PRIMERGY, BS2000/OSD, OSIV/MSP, OSIV/XSP, NetCOBOL, PowerCOBOL, and Fujitsu JCL. Extracts business logic from Fujitsu COBOL programs, analyzes Fujitsu JCL jobs, migrates Fujitsu mainframe applications to modern platforms (Java, cloud, containers), and creates migration strategies. Use when working with Fujitsu mainframe migration, FACOM systems, BS2000, OSIV platforms, NetCOBOL, PowerCOBOL, Fujitsu-specific COBOL extensions, Fujitsu JCL, or when users mention Fujitsu mainframe modernization, analyzing Fujitsu COBOL/JCL, SYMFOWARE database, or planning migration from Fujitsu legacy systems.

This skill should be used when debugging full-stack issues that span UI, backend, and database layers. It provides a systematic workflow to detect errors, analyze root causes, apply fixes iteratively, and verify solutions through automated server restarts and browser-based testing. Ideal for scenarios like failing schedulers, import errors, database issues, or API payload problems where issues originate in backend code but manifest in the UI.

Scaffold frontend, backend, DB, tests, and docs.

Complete autonomous workflow: Check Existing → Discover → Design → Qase → Automate → Run

Master-level fullstack software engineering with deep backend expertise. Use when building production-grade APIs, database architectures, authentication systems, microservices, or any backend-heavy application. Triggers on: (1) API design and implementation, (2) Database schema design and optimization, (3) Authentication/authorization systems, (4) System architecture decisions, (5) Performance optimization, (6) Error handling and logging, (7) Testing strategies, (8) DevOps and deployment, (9) Security hardening.

World-class #1 expert full stack developer specializing in enterprise-grade JavaScript/Node.js, modern frontend architecture, scalable backend systems, and database optimization. Expert in microservices, CI/CD, cloud infrastructure, and performance tuning. Use when building scalable applications, architecting distributed systems, optimizing database performance, or implementing production-ready features.

Complete full-stack development with Next.js 13+, React, Firebase, Tailwind CSS, and payment integration (Stripe, JazzCash, EasyPaisa). Build production-ready e-commerce platforms, SaaS applications, and scalable web applications. Comprehensive coverage of frontend architecture, backend API routes, database design, authentication systems, payment processing, form handling, error management, and optimization. Generate complete project structures, pages, components, API routes, database schemas, security rules, and deployment configurations using TypeScript.

Full-stack development expertise covering backend, frontend, database, DevOps, and testing domains

fullstack-implementation

Security and performance - hardening, optimization, auditing

Fullstack testing - unit, integration, E2E, coverage

Industry-specific guide for implementing Fullstory in banking and financial services applications. Covers regulatory requirements (PCI DSS, GLBA, SOX), privacy controls for sensitive financial data, authentication flows, transaction monitoring, and fraud detection patterns. Includes detailed examples for retail banking, investment platforms, and payment applications.

Industry-specific guide for implementing Fullstory in e-commerce and retail applications. Covers conversion funnel optimization, product interaction tracking, cart abandonment analysis, checkout flow privacy (PCI compliance), and customer journey mapping. Includes detailed examples for product pages, cart, checkout, and post-purchase experiences.