Skills（SKILL.md）は、AIエージェント（Claude Code、Cursor、Codexなど）に特定の能力を追加するための設定ファイルです。
詳しく見る →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.
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
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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.
Comprehensive guide for implementing Fullstory's Element Properties API across Web, Android, and iOS platforms. Teaches proper type handling, schema construction, value formatting, and platform-specific patterns including view/cell reuse. Includes detailed good/bad examples for e-commerce, forms, and dynamic content to help developers add semantic decoration to their apps and capture business-relevant properties on interactive elements.
Industry-specific guide for implementing Fullstory in gaming applications. Covers regulatory requirements (responsible gaming, KYC/AML), privacy controls for sensitive gaming data, deposit/withdrawal flows, player protection features, and self-exclusion compliance. Includes detailed examples for sportsbooks, casinos, poker, and lottery applications.
Comprehensive getting started guide for Fullstory Browser API v2 implementation. Provides the complete initialization flow, API overview, decision framework for which APIs to use, industry-specific guidance, privacy best practices, and framework integration patterns. Links to all core, meta, industry, and framework skills.
Industry-specific guide for implementing Fullstory in healthcare applications while maintaining HIPAA compliance. Covers PHI protection, patient portal UX, telehealth flows, appointment scheduling, and EHR integrations. Emphasizes that most healthcare data requires exclusion, not just masking, with detailed examples for compliant implementations.
Industry-specific guide for implementing Fullstory in media, entertainment, and streaming applications. Covers subscription funnel optimization, content engagement tracking, video player UX, paywall optimization, and ad-supported vs subscription models. Includes detailed examples for streaming services, news sites, gaming platforms, and content creators.
Comprehensive guide for implementing Fullstory's Observer/Callback API (observe method) for web applications. Teaches proper event subscription, callback handling, observer cleanup, and reacting to Fullstory lifecycle events. Includes detailed good/bad examples for session URL capture, initialization handling, and integration with analytics platforms.
Industry-specific guide for implementing Fullstory in B2B SaaS applications. Covers feature adoption tracking, onboarding optimization, churn prediction signals, multi-tenant privacy considerations, role-based experiences, and enterprise customer requirements. Includes detailed examples for dashboards, workflows, settings, and collaboration features.
Framework-agnostic guide for implementing stable, semantic selectors in any web application. Solves the dynamic class name problem caused by CSS-in-JS, CSS Modules, and build tools. Includes patterns for React, Angular, Vue, Svelte, Next.js, Astro, and more. Future-proofed for Computer User Agents (CUA) and AI-powered automation tools. Provides TypeScript patterns, naming taxonomies, and enterprise-scale conventions.
Industry-specific guide for implementing Fullstory in travel and hospitality applications including airlines, hotels, OTAs, car rentals, and vacation packages. Covers booking funnel optimization, search and filtering UX, payment handling (PCI), loyalty programs, and multi-traveler booking flows. Includes detailed examples for search, booking, check-in, and post-trip experiences.
Comprehensive guide for implementing Fullstory's User Properties API (setProperties with type 'user') for web applications. Teaches proper property naming, type handling, incremental updates, and special fields (displayName, email). Includes detailed good/bad examples for CRM integration, progressive profiling, and subscription tracking to help developers enrich user profiles for analytics and segmentation.
Designs functional architecture and detailed specifications for PHP/CakePHP applications based on analyzed requirements
Apply functional introspection principles to self-analysis.
Write functional tests that test public interfaces only (HTTP APIs via requests, libraries via exported functions, CLIs via command execution). Never test internal functions directly. Expose observability APIs for internal behavior testing.
Use when symfony functional tests
Validates that code actually works through sandbox testing, execution verification, and systematic debugging. Use this skill after code generation or modification to ensure functionality is genuine rather than assumed. The skill creates isolated test environments, executes code with realistic inputs, identifies bugs through systematic analysis, and applies best practices to fix issues without breaking existing functionality. This ensures code delivers its intended behavior reliably.