plugin-builder

Claude Market

Hand-curated open source repository for Claude Code plugins - tools, agents, skills, and MCP servers that extend Claude Code's capabilities.

What is Claude Market?

Claude Market is a plugin marketplace for Claude Code, providing a curated collection of high-quality extensions built by the community. Each plugin is reviewed for quality, documentation, and usefulness.

Installation

Add this marketplace to your Claude Code:

/plugin marketplace add claude-market/marketplace

Then browse available plugins:

/plugin

Available Plugins

Plugin Builder

Interactive tool for creating new Claude Code plugins through guided prompts.

Features:

• Create plugins with commands, agents, hooks, skills, and MCP servers
• Step-by-step prompts collect all necessary information
• Generates comprehensive, well-structured component files
• Validates plugin structure and configuration
• Serves as an example of plugin best practices

Install:

/plugin install plugin-builder

Learn more: plugin-builder/README.md

Contributing a Plugin

We welcome high-quality plugin contributions! Here's how to submit yours:

Prerequisites

1. Your plugin should be well-tested and functional
2. Include comprehensive documentation (README.md)
3. Follow plugin structure best practices
4. Have appropriate open source license

Quick Start: Use Plugin Builder

The easiest way to create a plugin for this marketplace:

1. Install the plugin-builder:

   /plugin install ./plugin-builder
   

2. Create your plugin:

   /plugin-builder:init
   

   Follow the prompts to create your plugin as a top-level directory

3. Validate your plugin:

   /plugin-builder:validate
   

4. Test locally:

   /plugin install ./{plugin-name}
   

Submission Process

1. Fork this repository

2. Add your plugin as a top-level directory:

   your-plugin/
   ├── .claude-plugin/
   │   └── plugin.json
   ├── commands/           # optional - only if you have commands
   ├── agents/             # optional - only if you have agents
   ├── hooks/              # optional - only if you have hooks
   ├── skills/             # optional - only if you have skills
   ├── mcp-servers/        # optional - only if you have MCP servers
   ├── CODEOWNERS          # required - defines reviewers
   ├── README.md
   └── LICENSE
   

3. Generate marketplace.json entry:

   Run the following command to automatically generate your plugin's entry in .claude-plugin/marketplace.json:

   make generate-marketplace-json
   

   This will scan your plugin directory and add the appropriate entry to the marketplace manifest.

4. Create a pull request with:

   • Clear description of what your plugin does
   • Screenshots or examples if applicable
   • Any special requirements or dependencies

5. Review process:

   • Maintainers will review for quality, documentation, and functionality
   • May request changes or improvements
   • Once approved, your plugin will be merged and available to all users

Plugin Quality Standards

To maintain a high-quality marketplace, submissions should meet these criteria:

Required

• Clear, comprehensive README with usage examples
• Valid plugin.json with complete metadata
• All components work as documented
• Open source license (MIT, Apache 2.0, GPL, etc.)
• No malicious code or security vulnerabilities

Recommended

• Detailed descriptions for all components
• Examples showing typical usage
• Edge case handling
• Keywords for discoverability
• Version number following semantic versioning

Plugin Structure

Every plugin must have:

• .claude-plugin/plugin.json - Plugin manifest
• CODEOWNERS - Defines maintainers and reviewers
• README.md - Documentation
• LICENSE - Open source license
• At least one component (command, agent, hook, skill, or MCP server)

Component files go in (directories are optional - only create if you have that component type):

• commands/*.md - Slash commands
• agents/*.md - Agents
• hooks/*.json - Hooks
• skills/*.md - Skills
• mcp-servers/*.json - MCP server configs

Plugin Ideas

Looking for inspiration? Here are plugin ideas the community would love:

Development Tools

• Framework-specific helpers (React, Vue, Next.js, etc.)
• Testing utilities (generate tests, fix failing tests)
• Code quality tools (linting, formatting, refactoring)
• Git workflow automation
• Docker/Kubernetes helpers

Language-Specific

• Python project scaffolding
• Go best practices
• Rust development tools
• JavaScript/TypeScript utilities

Documentation

• API documentation generators
• README templates
• Changelog automation
• Code comment generators