/plugin-forge

Plugin Structure Reference

Directory Hierarchy

plugin-name/
├── .claude-plugin/
│   └── plugin.json          # Required: Plugin metadata manifest
├── commands/                 # Optional: Custom slash commands
├── agents/                   # Optional: Agent definitions
├── skills/                   # Optional: Agent Skills
│   └── skill-name/
│       ├── SKILL.md         # Required for each skill
│       ├── scripts/         # Optional: Executable code
│       ├── references/      # Optional: Documentation
│       └── assets/          # Optional: Output files
├── hooks/                    # Optional: Event handlers
│   └── hooks.json
└── .mcp.json                # Optional: MCP server integrations

Plugin Manifest (plugin.json)

Location: .claude-plugin/plugin.json (must be in this directory)

Required fields:

• name: Unique identifier (kebab-case)

Standard metadata:

• version: Semantic versioning (e.g., "1.0.0")
• description: Plugin purpose
• author: Object with name, email, url
• homepage: URL
• repository: URL
• license: SPDX identifier
• keywords: Array of search terms

Component paths (optional):

• commands: Path to commands directory
• agents: Path to agents directory
• hooks: Path to hooks configuration
• mcpServers: Path to MCP configuration

Example plugin.json

{
  "name": "example-plugin",
  "version": "1.0.0",
  "description": "Example plugin for demonstration",
  "author": {
    "name": "Plugin Creator",
    "email": "creator@example.com"
  },
  "keywords": ["example", "demo"]
}

Component Types

Commands

Location: commands/ directory Format: Markdown files with frontmatter Naming: Subdirectories create namespaces via :

commands/
├── simple.md              # Invoked as /simple
└── namespace/
    └── command.md         # Invoked as /namespace:command

Agents

Location: agents/ directory Format: Markdown files describing agent capabilities

Skills

Location: skills/ directory Format: Subdirectories with SKILL.md file Structure: See skills documentation

Hooks

Location: hooks/hooks.json or path specified in manifest Events: PreToolUse, PostToolUse, UserPromptSubmit, Notification, Stop, SubagentStop, SessionStart, SessionEnd, PreCompact

MCP Servers

Location: .mcp.json at plugin root Purpose: External tool integrations

Path Requirements

• All paths relative to plugin root
• Start with ./ for custom paths
• Use ${CLAUDE_PLUGIN_ROOT} for dynamic resolution in hooks/MCP
• Components must be at plugin root, not inside .claude-plugin/