Development

Implement comprehensive testing strategies with pytest, fixtures, mocking, and test-driven development for FastAPI applications. Use when writing Python tests, setting up test suites, or implementing testing best practices.

Automatically detects, installs, and configures Language Server Protocol (LSP) servers for enhanced code intelligence. Provides go-to-definition, find-references, hover docs, and symbol navigation.TRIGGERS - Keywords: lsp, language server, code intelligence, go to definition, find references, hover, symbols, diagnostics, autocomplete, intellisense, code navigation, jump to definition, find usages, type info.TRIGGERS - Phrases: "set up lsp", "install language server", "enable code intelligence", "configure lsp", "go to definition not working", "find references", "show type", "navigate to symbol", "code navigation".TRIGGERS - Automatic: After tech-detection completes, when opening new file types, when LSP operations fail.

Creates, analyzes, updates, and evaluates Model Context Protocol (MCP) servers including architecture assessment, security validation, and connection configuration. Use when user asks if current context or logic should be MCP, requests MCP creation/improvement/update, mentions MCP is outdated, or asks how MCPs work, what MCPs are, explaining MCP concepts, understanding MCP architecture, protocol specification, server implementation, client integration, or connecting MCP servers to Claude Code.

Analyzes project structure, dependencies, and patterns to generate comprehensive context documentation. Uses parallel agent execution for faster analysis. Helps understand unfamiliar codebases quickly.

Use this skill when building MCP (Model Context Protocol) servers with FastMCP in Python. FastMCP is a framework for creating servers that expose tools, resources, and prompts to LLMs like Claude. The skill covers server creation, tool/resource definitions, storage backends (memory/disk/Redis/DynamoDB), server lifespans, middleware system (8 built-in types), server composition (import/mount), OAuth Proxy, authentication patterns, icons, OpenAPI integration, client configuration, cloud deployment (FastMCP Cloud), error handling, and production patterns. It prevents 25+ common errors including storage misconfiguration, lifespan issues, middleware order errors, circular imports, module-level server issues, async/await confusion, OAuth security vulnerabilities, and cloud deployment failures. Includes templates for basic servers, storage backends, middleware, server composition, OAuth proxy, API integrations, testing, and self-contained production architectures.Keywords: FastMCP, MCP server Python, Model Context

Audit code for security vulnerabilities using OWASP Top 10, STRIDE threat modeling, and secure coding practices. Identifies SQL injection, XSS, CSRF, auth issues, and secrets exposure. Returns prioritized findings with remediation.

This skill should be used when the user asks about "how to research", "research best practices", "evaluate sources", "source credibility", "academic research", "find reliable information", "cite sources", "research methodology", or needs guidance on conducting thorough web research and evaluating information quality.

Authoring WhatsApp Business Flows with validation, component guidance, and server integration patterns. Use when building conversational experiences, collecting user data, implementing conditional logic, or integrating with backend endpoints.

Manage Unity Catalog metadata tags for data governance and classification. Use when applying tags to tables and columns, classifying data sensitivity (PII, PHI), marking data quality attributes, or when user mentions Unity Catalog tagging, metadata management, data governance, or compliance workflows.

Generate Vitest unit tests following project conventions. Use when user asks to create tests, write test cases, or add test coverage for TypeScript functions.

複雑な実装をシンプルにする方法を提案し、よりエレガントなコードへの改善案をGitHub PR形式で出力するスキル

Manage and troubleshoot Coolify deployments using the official CLI and API. Use this skill when the user needs help with Coolify server management, WordPress troubleshooting on Coolify, debugging service issues, checking SSL certificates, accessing containers, or managing applications and databases through Coolify. Particularly useful for diagnosing down services, fixing .htaccess issues, REST API problems, and performing deployment operations.

Read a webpage into cleaned markdown using curl + markitdown + codex exec. Use whenever asked to read a webpage or extract article content from a URL. Static HTML only; JS/client-rendered pages require a Playwright workflow.

Expert knowledge for testing Composable Rust applications. Use when writing unit tests for reducers, setting up integration tests with real dependencies, using test utilities (TestStore, FixedClock, mocks), working with testcontainers for PostgreSQL/Redpanda, property-based testing, or questions about testing patterns and best practices.

Production patterns for managing complex application state in React without Redux, Zustand, or other state libraries. Includes multi-stage loading, command patterns, refs for performance, and parallel data fetching. Use when building complex UIs with interconnected states, need loading stages and progress tracking, or implementing command patterns.

PRIMARY tool for fetching library/framework documentation. PROACTIVELY use instead of WebFetch/WebSearch when user requests docs, API references, setup guides, or code examples for any programming library or framework. Use this skill immediately when detecting queries like "show me X docs", "how do I use Y", "get Z documentation", etc. Token-efficient alternative to MCP servers.

Provides code review guidelines, checklists, and best practices for reviewing pull requests. Use when reviewing code, preparing for code review, or when users mention "code review", "review PR", "review checklist", or "code quality".

Use when configuring, maintaining, troubleshooting, or optimizing Claude Code extensions including skills, commands, hooks, MCP servers, or agents. Provides best practices and prevents common mistakes.

Teaches code splitting with lazy() and Suspense in React 19 for reducing initial bundle size. Use when implementing lazy loading, route-based splitting, or optimizing performance.

Creating and Optimizing Claude Code Skills. Design reusable knowledge capsules with progressive disclosure (metadata → content → resources). Apply freedom levels (high/medium/low), create examples, validate YAML. Use when building domain-specific guidance or automating recurring patterns.