Documentation

ReactでSPAフロントエンドを実装・改修するためのガイド。バックエンド分離前提でNext.jsやサーバーサイド機能に依存せず、React Router中心のクライアント実装を行う時に使う。認証はAuthProviderとuseAuthカスタムフックで統一し、OpenAPIからorvalまたはopenapi-typescriptで型/クライアントを生成して利用する。ESLint+Prettier、zod、shadcn/ui、デザイントークン（CSS変数/Tailwindテーマ）を前提にする場合に適用する。ディレクトリ構成はmodules/components/hooks/providers/servicesなどの直感的な命名で複雑化に耐える構成にする。

Expert knowledge of testing Node.js and Express applications including Jest configuration, Supertest for API testing, unit vs integration vs e2e testing, mocking external APIs, test organization, code coverage, CI/CD integration, and TDD practices. Use when writing tests, setting up testing framework, debugging test failures, or adding test coverage.

Expert Unreal Engine 5 developer and technical artist for complete game development via agentic coding. Enables AI-driven control of Unreal Editor through MCP, Python scripting, Blueprints, and C++ for level design, asset management, gameplay programming, and visual development.

Technical workflow for architect-agent - PRD creation with mandatory database context, entity design with Zod, iteration review, and agent coordination in the iterative v2.0 system

Generate PlantUML diagrams from text descriptions and convert them to PNG/SVG images. Use when asked to "create a diagram", "generate PlantUML", "convert puml to image", "extract diagrams from markdown", or "prepare markdown for Confluence". Supports all PlantUML diagram types including UML (sequence, class, activity, state, component, deployment, use case, object, timing) and non-UML (ER diagrams, Gantt charts, JSON/YAML visualization, mindmaps, WBS, network diagrams, wireframes, and more).

Use when configuring Karabiner-Elements keyboard customizations, before writing JSON - provides systematic workflow for complex modifications with correct structure, common patterns, and guidance on manual vs generator approaches

Generate neat, clean flashcards in markdown table format from a topic title or reference file. Use when you need to create study materials, review cards, or learning aids for any subject.

Fetches library documentation from Context7 and the web, then saves it to ai_docs/ in organized category-based folders. Supports version management, topic-specific documentation, and refreshing existing docs. Automatically invoked for requests to fetch or save library documentation.

Search technical documentation using executable scripts to detect query type, fetch from llms.txt sources (context7.com), and analyze results. Use when user needs: (1) Topic-specific documentation (features/components/concepts), (2) Library/framework documentation, (3) GitHub repository analysis, (4) Documentation discovery with automated agent distribution strategy

Use when writing Go code to interact with Hetzner Cloud API - automation, infrastructure provisioning, bots, integrations, or programmatic cloud operations

Creates and validates Claude Code skills with proper format. Use when creating new skills, writing SKILL.md files, validating existing skills, or when user mentions "skill format", "create skill", "skill template", or "validate skill".

This skill should be used when the user asks to "find something to write about", "brainstorm topics", "what should I write about", "find writing ideas", "gather sources for", "pull references on", or needs help discovering topics from their reading highlights. Leverages Readwise MCP to surface patterns and gather references.

Safe database migration workflow with Spatie backup integration. Always backup before migration, update mermaid.rb schema, keep max 10 recent backups. USE WHEN creating migrations, running migrations, restoring database, managing schema changes, or any risky database operations.

Automated documentation generation for Cloudflare Workers monorepo. Creates API documentation from OpenAPI specs, generates package READMEs, and maintains architecture documentation with intelligent content generation.

Design and implement RESTful API endpoints following industry best practices for resource naming, HTTP methods, status codes, and versioning. Use this skill when creating or modifying API route handlers, endpoint files, controller files, or API router configuration files. Use this skill when working with REST API design, implementing HTTP endpoints in backend frameworks, defining API routes and URL patterns, setting up API versioning strategies, or configuring request/response handling in web services. Use this skill when working with files in routes/, api/, controllers/, endpoints/, or views/ directories that handle HTTP requests. Use this skill when defining OpenAPI/Swagger specifications, implementing rate limiting, or establishing API conventions for your application.

Allra 백엔드 테스트 작성 표준. Use when writing test code, choosing test helpers, generating test data with Fixture Monkey, or verifying test coverage.

Look up Fannie Mae underwriting guidelines for income, assets, credit, or collateral verification. Use when questions involve DTI, income documentation, asset requirements, credit standards, or any B3/B4 guideline references. Reads guidelines dynamically from configs/guidelines/ - never hardcodes content.

Bump project versions across configs, docs, and changelog using git-workspace-review context.

BDD specifications using Gherkin syntax, feature files, step definitions

Optimize code for Cloudflare Workers free plan with 10ms CPU limit. Use when writing API routes, server code, middleware, or discussing performance optimization.