Practicing TDD
Guide Test-Driven Development workflow with Red-Green-Refactor cycle. Use when developing features, fixing bugs, or when user mentions TDD/テスト駆動開発/test-first.
prometheus-configuration
Set up Prometheus for comprehensive metric collection, storage, and monitoring of infrastructure and applications. Use when implementing metrics collection, setting up monitoring infrastructure, or configuring alerting systems.
prompt-engineering-patterns
Master advanced prompt engineering techniques to maximize LLM performance, reliability, and controllability in production. Use when optimizing prompts, improving LLM outputs, or designing production prompt templates.
rag-implementation
Build Retrieval-Augmented Generation (RAG) systems for LLM applications with vector databases and semantic search. Use when implementing knowledge-grounded AI, building document Q&A systems, or integrating LLMs with external knowledge bases.
sast-configuration
Configure Static Application Security Testing (SAST) tools for automated vulnerability detection in application code. Use when setting up security scanning, implementing DevSecOps practices, or automating code vulnerability detection.
Searching Intelligently
Intelligently select and use the most appropriate search tool based on search intent. Use when searching for information, whether web content, local files, locations, or specific data. Automatically chooses between WebSearch, Brave Search, Firecrawl, Desktop Commander, or other search MCPs.
Setting up Prettier
Configure Prettier for any JavaScript/TypeScript project with recommended settings. Use when setting up code formatting, adding Prettier to existing projects, or when user mentions Prettier setup/フォーマッター設定.
setup-post-tool-use-hooks
プロジェクトの .claude/settings.json にPostToolUseフック（prettier, eslint等）を設定する。Use when user mentions hooks設定/フック設定/formatter hooks/PostToolUse/setup-hooks/setup-post-tool-use-hooks.
skill-creator
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.
slo-implementation
Define and implement Service Level Indicators (SLIs) and Service Level Objectives (SLOs) with error budgets and alerting. Use when establishing reliability targets, implementing SRE practices, or measuring service performance.
spec-based-development
Generate detailed, agent-executable feature specifications by interviewing the user with AskUserQuestionTool. Transforms rough ideas into comprehensive SPEC.md files through phased deep interviews (5 phases) covering technical architecture, data design, API design, UI/UX, edge cases, security, performance, and tradeoffs. Produces hybrid specs with Acceptance Criteria and phased implementation tasks with dependencies. Use when user mentions "spec", "仕様書作成", "仕様駆動", "インタビューして", "SPEC.md", "feature spec", "仕様を書いて", "大きな機能を計画", or wants to plan a feature before implementation.
stripe-integration
Implement Stripe payment processing for robust, PCI-compliant payment flows including checkout, subscriptions, and webhooks. Use when integrating Stripe payments, building subscription systems, or implementing secure checkout flows.
translating-technical-articles
Translates English technical articles (engineering blogs, documentation) to Japanese while preserving layout and structure. Use when the user asks to translate an article, convert English content to Japanese, or mentions translating a URL or technical blog post.
typescript-advanced-types
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications. Use when implementing complex type logic, creating reusable type utilities, or ensuring compile-time type safety in TypeScript projects.
web-artifacts-builder
Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.
web3-testing
Test smart contracts comprehensively using Hardhat and Foundry with unit tests, integration tests, and mainnet forking. Use when testing Solidity contracts, setting up blockchain test suites, or validating DeFi protocols.
webapp-testing
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
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