Look up examples and patterns from the official Anthropic Claude Cookbooks repository. Use when you need reference implementations, code examples, or best practices for Claude integrations, tool use, agents, prompting techniques, or API usage.

Central authority for Claude Desktop application - the native desktop app for running Claude Code sessions. Covers installation (macOS/Windows), Git worktrees for parallel sessions, .worktreeinclude file configuration, cloud session launch, environment configuration, MCP Desktop Extensions (.mcpb), and Desktop vs CLI comparison. Assists with Desktop setup, worktree configuration, cloud sessions, and troubleshooting. Delegates 100% to docs-management skill for official documentation.

Use this skill when the user wants to create Angular applications, generate Angular components/services/modules, or automate Angular development workflows. Handles scaffolding complete Angular apps with routing and guards, generating individual Angular artifacts, setting up project structure, and initializing git repositories with Angular best practices.

Consult official Claude Code documentation from docs.claude.com using selective fetching. Use this skill when working on Claude Code hooks, skills, subagents, MCP servers, or any Claude Code feature that requires referencing official documentation for accurate implementation. Fetches only the specific documentation needed rather than loading all docs upfront.

Essential reference for ALL Claude Code artifact work (Skills, Commands, Subagents, Hooks, Plugins). Automatically activates when creating, updating, validating, or discussing any Claude Code artifact. Provides complete specifications, YAML schemas, field definitions, creation workflows, decision frameworks, comparison matrices, validation rules, common mistakes, and best practices. Always consult for artifact specifications, technical requirements, workflow guidance, quality standards, or troubleshooting. Works alongside claude-researcher skill for documentation verification.

Claude Code extensibility: agents, skills, output styles. Capabilities: create/update/delete agents and skills, YAML frontmatter, system prompts, tool/model selection, resumable agents, CLI-defined agents. Actions: create, edit, delete, optimize, test extensions. Keywords: agent, skill, output-style, SKILL.md, subagent, Task tool, progressive disclosure. Use when: creating agents/skills, editing extensions, configuring tool access, choosing models, testing activation.

CLAUDE Framework coding standards for code quality, naming conventions, error handling, security, testing, database, and logging

Expert Git workflow management for Claude Code sessions with branch naming conventions, push retry logic, conflict resolution, and PR automation specifically designed for AI-assisted development workflows.

Guides Claude Code setup and configuration. Use when setting up CLAUDE.md, rules, hooks, or skills structure for projects.

Interactive hook creator for Claude Code. Triggers when user mentions creating hooks, PreToolUse, PostToolUse, hook validation, hook configuration, settings.json hooks, or wants to automate tool execution workflows.

**Original Doc URL**: https://code.claude.com/docs/en/hooks-guide

Complete reference for Claude Code hooks system (January 2026). Use when creating hooks, understanding hook events, matchers, exit codes, JSON output control, environment variables, plugin hooks, or implementing hook scripts.

Guide for creating event-driven hooks for Claude Code. Use when automating responses to tool calls, lifecycle events, or implementing custom validations.

Review legal contracts, NDAs, employment agreements, SaaS terms, and M&A documents. Identifies unfavorable terms, suggests redlines, and compares to market standards. Use for contract analysis, due diligence, or negotiation prep.

Expert assistant for conducting remote experiments with Claude-Light - a web-accessible RGB LED and spectral sensor instrument for statistics, regression, optimization, and design of experiments

Expert on Model Context Protocol (MCP) integration, MCP servers, installation, configuration, and authentication. Triggers when user mentions MCP, MCP servers, installing MCP, connecting tools, MCP resources, MCP prompts, or remote/local MCP servers.

Model Context Protocol (MCP) expert for Claude Code. Install, configure, and troubleshoot MCP servers. Covers HTTP, SSE, and stdio transports, authentication, popular integrations (Sentry, GitHub, Jira, Notion, databases). Triggers on MCP, Model Context Protocol, MCP server, installing MCP, connecting tools, webhooks, remote server.

CLAUDE.md file generation and optimization for Claude Code projects. Capabilities: initialize project instructions, analyze codebase context, optimize existing CLAUDE.md, apply Anthropic best practices, reduce token usage, improve effectiveness. Actions: init, create, optimize, enhance CLAUDE.md files. Keywords: CLAUDE.md, project instructions, Claude Code setup, project context, codebase analysis, Anthropic best practices, token optimization, project configuration, AI instructions, coding guidelines, project rules, workspace setup. Use when: initializing CLAUDE.md for new projects, optimizing existing project instructions, setting up Claude Code for a codebase, improving AI coding guidelines.

Creating and maintaining CLAUDE.md project memory files that provide non-obvious codebase context. Use when (1) creating a new CLAUDE.md for a project, (2) adding architectural patterns or design decisions to existing CLAUDE.md, (3) capturing project-specific conventions that aren't obvious from code inspection.

This skill automatically detects when CLAUDE.md files need updates based on codebase analysis. It identifies new patterns, code violations, stale documentation, and anti-patterns, then proposes specific markdown diffs showing exactly what CLAUDE.md sections should be added, modified, or removed. When codebase architecture changes, new patterns emerge, or documented practices diverge from actual code, this skill analyzes the robo-trader project structure and generates actionable recommendations with confidence scores. Should be invoked after major feature completions, during code reviews, or as periodic maintenance scans.

Manage CLAUDE.md documentation when updating the seed system documentation or project overview. Not for creating specific skills or commands.

Analyzes, generates, and enhances CLAUDE.md files for any project type using best practices, modular architecture support, and tech stack customization. Use when setting up new projects, improving existing CLAUDE.md files, or establishing AI-assisted development standards.

Audit, evaluate, and improve CLAUDE.md files across a codebase to ensure Claude Code has optimal project context.

Validate/update/create CLAUDE.md memory files with progressive disclosure and context-optimized structure

Central `CLAUDE.md` file with project guidelines injected into system prompt, achieving 10% accuracy lift in multi-hop reasoning.

Create or update CLAUDE.md files following best practices for optimal AI agent onboarding

Persistent memory compression system for Claude Code enabling context preservation across sessions with automatic observations, semantic search, and privacy controls

Create and optimize CLAUDE.md memory files or .claude/rules/ modular rules for Claude Code projects. Comprehensive guidance on file hierarchy, content structure, path-scoped rules, best practices, and anti-patterns. Use when working with CLAUDE.md files, .claude/rules directories, setting up new projects, or improving Claude Code's context awareness.

Use when testing iOS apps on simulator, capturing screenshots for validation gates, automating UI testing with expo-mcp and xc-mcp, or verifying visual correctness - combines expo-mcp autonomous testing (React Native level) with xc-mcp simulator management (iOS level)

Use when starting Metro bundler for Expo development, debugging Metro errors, or enabling expo-mcp local capabilities - manages Metro lifecycle with EXPO_UNSTABLE_MCP_SERVER=1 flag for autonomous testing

PROMETHEUS NEXUS v6.0 - Constitutional multi-agent framework with director domains, mutual accountability, and Teammate coordination. Use when spawning AI directors, coordinating multi-agent systems, establishing governance boundaries, or implementing hierarchical collaboration with constitutional compliance.

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Configure, manage, update and review Claude Code permissions, sandboxing, and tool access. Use when user wants to set up permissions, configure sandboxing, update allowed tools, manage settings.json permissions, or review permissions in skills or commands or agents or settings.json. When user writes a new skill, command, agent, or updates settings.json, they should use this skill to manage permissions.

Handle photo uploads, analysis, and processing in Claude Code. This skill should be used when users want to upload images, analyze screenshots, process photos, or work with visual content in Claude Code conversations.

Author reference for claude-pilot components. Skills, commands, agents, rules documentation patterns. VIBE coding compliance.

Comprehensive validation system for Claude Code plugins to ensure compliance with official plugin development guidelines and prevent installation failures

Complete reference for Claude Code plugins system (January 2026). Use when creating plugins, understanding plugin.json schema, marketplace configuration, bundling skills/commands/agents/hooks/MCP/LSP servers, plugin caching, validation, or distribution. Covers plugin components, directory structure, installation scopes, environment variables, CLI commands, debugging, and enterprise features.

Guide for creating and validating Claude Code plugin.json files. Use when creating plugins, validating plugin schemas, or troubleshooting plugin configuration.

Use when brainstorming product names, company names, or brand names. Based on David Placek's Lexicon Branding methodology (Vercel, Swiffer, Sonos, Azure, BlackBerry).

Generate concise CLAUDE.md files and agent documentation following best practices. Use when setting up a new project for Claude Code, auditing existing CLAUDE.md, or creating progressive disclosure documentation structure.

Anthropic official XML tag patterns and prompt engineering best practices. Document behavior control tags, system prompt internals, and the 10-Component Framework for effective Claude prompts.

Persistent memory for Claude across conversations. Use when starting any task, before writing or editing code, before making decisions, when user mentions preferences or conventions, when user corrects your work, or when completing a task that overcame challenges. Ensures Claude never repeats mistakes and always applies learned patterns.

CLAUDE.md 메모리 파일 리팩토링 및 정리 스킬. 기존 CLAUDE.md 분석, 구조 개선, 컨텍스트 효율성 최적화를 수행합니다. 트리거: CLAUDE.md 리팩토링, CLAUDE.md 정리, 메모리 파일 개선, 프로젝트 가이드 최적화, CLAUDE.md 분석, 클로드 가이드 작성, CLAUDE.md 작성 도와줘.

Self-improvement and learning skill that helps Claude learn from user interactions, corrections, and preferences

Compact context at natural breakpoints to free tokens and continue working. Use PROACTIVELY at phase boundaries, after commits, or when token usage >150k. Better than random auto-compact. Supports custom compaction prompts.

Comprehensive collection of 128+ ready-to-use scientific skills for Claude enabling research across biology, chemistry, medicine, genomics, and advanced analysis domains.

Expert integration patterns for Claude API and TypeScript SDK covering Messages API, streaming responses, tool use, error handling, token optimization, and production-ready implementations for building AI-powered applications

Build autonomous AI agents using Claude Agent SDK with computer use, tool calling, MCP integration, and production best practices for Anthropic models

Expert on Claude Code settings.json configuration, permissions, sandbox, environment variables, and settings hierarchy. Triggers when user mentions settings.json, permissions, allow rules, deny rules, sandbox, hooks configuration, or settings precedence.