Claude Code Extensions

A comprehensive collection of production-ready agents, hooks, commands, and output styles for Claude Code

Supercharge your Claude Code experience with 50+ specialized agents, 8 lifecycle hooks, 6 slash commands, and powerful automation tools—all ready to install and customize.

✨ Highlights

• 🤖 50+ Expert Agents - From code reviewers to framework specialists (React, Django, Temporal, Cloudflare, and more)
• 🔒 Safety-First Hooks - Block dangerous commands, protect sensitive files, audit all operations
• ⚡ Auto-Linting - Integrated Python, Go, and JS/TS linters that run automatically
• 🎯 Smart Orchestration - Tech-lead agents that coordinate multi-step tasks across specialists
• 📦 Easy Installation - Interactive CLI installer with settings.json merging
• 🧪 Battle-Tested - Production patterns from real-world Claude Code workflows

🚀 Quick Start

Installation

Option 1: Interactive Installer (Recommended)

git clone https://github.com/nodnarbnitram/claude-code-extensions.git
cd claude-code-extensions
./install_extensions.py install ~/my-project

The installer lets you:

• ✅ Choose extensions interactively by type or category
• ✅ Preview changes with --dry-run before applying
• ✅ Merge settings.json safely without conflicts
• ✅ Copy dependencies automatically

# Common usage patterns
./install_extensions.py list                    # See all available extensions
./install_extensions.py info code-reviewer      # Get details on specific extension
./install_extensions.py install --dry-run ~/my-project   # Preview what will be installed
./install_extensions.py install --type agent --category core ~/my-project  # Install specific category

Option 2: Manual Copy

# Copy specific items manually
cp .claude/agents/core/code-reviewer.md ~/my-project/.claude/agents/
cp -r .claude/hooks ~/my-project/.claude/
cp .claude/settings.json ~/my-project/.claude/

Creating New Extensions

Agents - Use the built-in meta-agent:

> Use the meta-agent to create a [domain] specialist agent

Hooks - Use Python with uv script format (see CLAUDE.md for templates)

Commands - Create .md files in .claude/commands/ with frontmatter

Output Styles - Create .md files in .claude/output-styles/ with custom prompts

📖 Full guide: See CLAUDE.md for detailed patterns and examples

💡 Why Use This?

For Teams

• Share consistent workflows across your organization
• Enforce code quality standards automatically
• Onboard developers faster with specialized agents
• Version control your Claude Code configuration

For Solo Developers

• Automate repetitive tasks with hooks and commands
• Get expert-level assistance across multiple frameworks
• Keep your main Claude context focused with subagents
• Protect yourself from mistakes with safety hooks

For Learning

• Explore production-ready extension patterns
• Learn from 50+ agent examples across different domains
• Understand hook lifecycle and automation
• See how to structure complex AI workflows

📚 Extension Reference

Commands

Command	Description	Arguments
/agent-from-docs	Create a specialized agent by analyzing documentation URLs	<doc-url> [additional-urls...]
/prime	Load context for a new agent session by analyzing codebase structure, documentation and README	-
/git-status	Understand the current state of the git repository	-
/git-commit	Analyze changes and create well-formatted commits with emoji conventional format	[message] [--amend] (Optional)
/frontend-mode	Load Ultracite rules for JS/TS development	-
/security-scan	Run security scans on project files (Python/Go/JS/TS)	[path]

Agents

📖 View All 50+ Agents (Meta, Core, Research, Orchestrators, Universal, Specialized)

Meta Agent

Agent	Description
meta-agent	Generates new, complete Claude Code sub-agent configuration files from descriptions using Opus

Core Agents

Agent	Description
code-reviewer	Rigorous, security-aware code review after features, bug-fixes, or pull-requests
code-archaeologist	Explores and documents unfamiliar, legacy, or complex codebases
fact-checker	Validates agent outputs to prevent hallucinations and ensure accuracy
documentation-specialist	Crafts and updates READMEs, API specs, architecture guides, and user manuals
performance-optimizer	Identifies bottlenecks and applies optimizations for high-performance systems

Research Agents

Agent	Description
research-coordinator	Plans and coordinates complex research tasks across specialists
academic-researcher	Searches scholarly sources, peer-reviewed papers with citation tracking
data-analyst	Quantitative analysis, statistical insights, data visualization
technical-researcher	Analyzes code repositories, technical docs, implementation details
web-researcher	Current news, industry reports, market trends, real-time intelligence

Orchestrators

Agent	Description
tech-lead-orchestrator	Strategic project analysis, coordinates multi-step tasks across sub-agents
project-analyst	Detects frameworks, tech stacks, architecture for proper routing
team-configurator	Sets up AI teams, selects specialists, updates CLAUDE.md config

Universal (Framework-Agnostic)

Agent	Description
api-architect	RESTful design, GraphQL schemas, OpenAPI specs
backend-developer	Server-side code across any language or stack
frontend-developer	Responsive UIs with React, Vue, Angular, Svelte, or vanilla JS
tailwind-css-expert	Tailwind CSS styling and utility-first refactors

Specialized: React

Agent	Description
react-component-architect	React 19+ patterns, hooks, component design
react-nextjs-expert	Next.js SSR, SSG, ISR, full-stack React
tanstack-start-expert	TanStack Start, Router, server functions

Specialized: Vue

Agent	Description
vue-component-architect	Vue 3 Composition API, composables
vue-nuxt-expert	Nuxt.js SSR, SSG, full-stack Vue

Specialized: Django

Agent	Description
django-backend-expert	Models, views, services, Django implementations
django-api-developer	DRF and GraphQL API development
django-orm-expert	ORM optimization, complex queries, migrations

Specialized: Python

Agent	Description
typer-expert	Typer CLI development, validation, testing

Specialized: Temporal.io

Agent	Description
temporal-core	Core concepts, architecture, determinism
temporal-python	Python SDK async/await, pytest, AsyncIO
temporal-go	Go SDK workflow-safe primitives, context
temporal-typescript	TypeScript SDK proxyActivities, type safety
temporal-testing	Testing strategies, time-skipping, mocking
temporal-troubleshooting	Error diagnosis, non-determinism issues

Specialized: Go

Agent	Description
go-google-style-expert	Google Go style guide, conventions, Go 1.25+

Specialized: Anthropic

Agent	Description
claude-agent-sdk-typescript-expert	Claude Agent SDK for TypeScript/Node.js
claude-agent-sdk-python-expert	Claude Agent SDK for Python

Specialized: Cloudflare

Agent	Description
cloudflare-workers-expert	Workers, edge computing, KV, D1, R2, Durable Objects
cloudflare-workers-ai-expert	Workers AI, model selection, RAG, streaming
cloudflare-workers-for-platforms-expert	Multi-tenant architectures, dispatch namespaces
cloudflare-workflows-expert	Durable execution, step APIs, DAG workflows
cloudflare-ai-agents-sdk-expert	AI Agents SDK, WebSockets, MCP servers

Specialized: Crossplane

Agent	Description
crossplane-upgrade-agent	Crossplane v1 to v2 migrations
crossplane-aws-rds-expert	AWS RDS provider, Aurora, compositions

Hooks

Python hooks using uv run --script for zero-config dependency management.

Hook	Event	Purpose
pre_tool_use.py	PreToolUse	🔒 Blocks dangerous commands, protects .env files, audit logging
post_tool_use.py	PostToolUse	📝 Logs executions, triggers auto-linting on file changes
session_start.py	SessionStart	🚀 Injects git status and project context
user_prompt_submit.py	UserPromptSubmit	📊 Logs and validates user prompts
pre_compact.py	PreCompact	💾 Preserves info before context compaction
stop.py	Stop	🏁 Runs when main agent finishes
subagent_stop.py	SubagentStop	🔄 Executes when subagent completes
notification.py	Notification	🔔 Handles Claude Code notifications
slack_notification.py	All events	💬 Sends Slack DMs for Claude Code events (requires SLACK_BOT_TOKEN, SLACK_USER_ID). Note: Caches transcript path on SessionStart to work around stale path bug in resumed sessions
lint/check.py	(Auto-triggered)	⚡ Auto-lints: ruff, golangci-lint, biome

Utilities: LLM integrations (Anthropic, OpenAI, Ollama), TTS engines (pyttsx3, OpenAI, ElevenLabs)

📖 Documentation

• CLAUDE.md - Complete guide for creating extensions
• CONTRIBUTING.md - How to contribute to this project
• docs/claude-code/ - Official Claude Code documentation

📋 Requirements

• Claude Code CLI
• uv - Python package manager
• Python 3.11+

🎯 Usage Examples

Auto Code Review

> Review my recent changes

The code-reviewer agent automatically analyzes your git diff.

Desktop Notifications Configure hooks for desktop alerts when Claude needs input (see CLAUDE.md).

Test Hooks Locally

echo '{"tool_name": "Bash", "tool_input": {"command": "ls"}}' > test.json
uv run ./.claude/hooks/pre_tool_use.py < test.json
echo $?  # 0 = allowed, 2 = blocked

🤝 Contributing

We welcome contributions! See CONTRIBUTING.md for:

• Development setup
• Testing guidelines
• Pull request process
• Style guidelines

Quick tips:

• Use the meta-agent to create new agents
• Follow existing patterns in .claude/hooks/
• Test thoroughly before submitting
• Update documentation with your changes

📦 Project Structure

.claude/
├── agents/           # 50+ specialized AI assistants
├── hooks/            # Lifecycle automation scripts
├── commands/         # Reusable slash commands
├── output-styles/    # Custom system prompts
└── settings.json     # Hook configuration

docs/                 # Claude Code official docs
install_extensions.py # Interactive installer CLI

🔗 Resources

• Claude Code Docs
• Claude Code GitHub
• Report Issues

📄 License

MIT License - Free for everyone, including commercial use.

What this means:

• ✅ Use it anywhere - personal projects, startups, Fortune 500 companies
• ✅ Modify it however you want
• ✅ No permission needed
• ✅ Just keep the copyright notice

That's it. Use it, learn from it, build amazing things. 🚀