Plugin Creator

Create Claude Code plugins to extend functionality with custom commands, agents, skills, hooks, and MCP servers.

Plugin Creation Workflow

1. Gather Requirements

Ask the user:

• What functionality should the plugin provide?

• Which components are needed? (commands, agents, hooks, MCP servers, skills)

• Who is the target audience? (personal, team, public)

2. Create Plugin Structure

my-plugin/ ├── .claude-plugin/ │ └── plugin.json # Required ├── commands/ # Optional: slash commands ├── agents/ # Optional: sub-agents ├── skills/ # Optional: agent skills ├── hooks/ # Optional: event handlers └── .mcp.json # Optional: MCP servers

3. Write plugin.json

Minimal example:

{ "name": "my-plugin", "description": "Brief description", "version": "1.0.0", "author": {"name": "Author Name"} }

4. Add Components

Based on user requirements, add:

• Commands: See commands.md for slash command format

• Agents: See agents.md for agent definition format

• Hooks: See hooks.md for event handler configuration

• MCP Servers: See mcp-servers.md for server configuration

5. Test Locally

Create a test marketplace:

mkdir test-marketplace/.claude-plugin

Create test-marketplace/.claude-plugin/marketplace.json :

{ "name": "test-marketplace", "owner": {"name": "Developer"}, "plugins": [{"name": "my-plugin", "source": "./my-plugin"}] }

Test commands:

/plugin marketplace add ./test-marketplace /plugin install my-plugin@test-marketplace

Quick Reference

Command File (commands/hello.md)

description: Greet the user

Hello Command

Greet the user warmly.

Agent File (agents/reviewer.md)

description: Code review specialist capabilities: ["review", "suggestions"]

Reviewer

Review code for quality and best practices.

Hooks (hooks/hooks.json)

{ "hooks": { "PostToolUse": [{ "matcher": "Write|Edit", "hooks": [{"type": "command", "command": "prettier --write $CLAUDE_FILE_PATH"}] }] } }

References

Plugin Development

• Plugins Guide - Complete plugin creation guide

• Plugins Reference - Technical schemas and configurations

• Plugin Structure - Directory layout and plugin.json schema

• Marketplace - Plugin distribution

Plugin Components

• Commands - Slash command format

• Agents - Sub-agent definitions

• Hooks - Event handlers

• MCP Servers - External tool integration

Skills Development

• Skills Overview - What skills are and how they work

• Skills Best Practices - Writing effective skills

• Skills Schema - SKILL.md format and validation