plugin-forge

SKILL.md

CC Plugin Forge

Purpose

Build and manage Claude Code plugins with correct structure, manifests, and marketplace integration. Includes workflows, automation scripts, and reference docs.

When to Use

Creating new plugins for a marketplace

Adding/modifying plugin components (commands, skills, agents, hooks)

Updating plugin versions

Working with plugin or marketplace manifests

Setting up local plugin testing

Publishing plugins

Getting Started

Create New Plugin
Use create_plugin.py to generate plugin structure:

python scripts/create_plugin.py plugin-name \
  --marketplace-root /path/to/marketplace \
  --author-name "Your Name" \
  --author-email "your.email@example.com" \
  --description "Plugin description" \
  --keywords "keyword1,keyword2" \
  --category "productivity"

This automatically:

Creates plugin directory structure

Generates plugin.json manifest

Creates README template

Updates marketplace.json

Bump Version

Use bump_version.py to update versions in both manifests:

python scripts/bump_version.py plugin-name major|minor|patch \
  --marketplace-root /path/to/marketplace

Semantic versioning:

major: Breaking changes (1.0.0 → 2.0.0)

minor: New features, refactoring (1.0.0 → 1.1.0)

patch: Bug fixes, docs (1.0.0 → 1.0.1)

Development Workflow

1. Create Structure

Manual approach (if not using script):

mkdir -p plugins/plugin-name/.claude-plugin
mkdir -p plugins/plugin-name/commands
mkdir -p plugins/plugin-name/skills

2. Plugin Manifest

File: plugins/plugin-name/.claude-plugin/plugin.json

{
  "name": "plugin-name",
  "version": "0.1.0",
  "description": "Plugin description",
  "author": {
    "name": "Your Name",
    "email": "your.email@example.com"
  },
  "keywords": ["keyword1", "keyword2"]
}

3. Register in Marketplace

Update .claude-plugin/marketplace.json:

{
  "name": "plugin-name",
  "source": "./plugins/plugin-name",
  "description": "Plugin description",
  "version": "0.1.0",
  "keywords": ["keyword1", "keyword2"],
  "category": "productivity"
}

4. Add Components

Create in respective directories:

Component
Location
Format

Commands
commands/
Markdown with frontmatter

Skills
skills/<name>/
Directory with SKILL.md

Agents
agents/
Markdown definitions

Hooks
hooks/hooks.json
Event handlers

MCP Servers
.mcp.json
External integrations

5. Local Testing

# Add marketplace
/plugin marketplace add /path/to/marketplace-root

# Install plugin
/plugin install plugin-name@marketplace-name

# After changes: reinstall
/plugin uninstall plugin-name@marketplace-name
/plugin install plugin-name@marketplace-name

Plugin Patterns

Framework Plugin

For framework-specific guidance (React, Vue, etc.):

plugins/framework-name/
├── .claude-plugin/plugin.json
├── skills/
│   └── framework-name/
│       ├── SKILL.md
│       └── references/
├── commands/
│   └── prime/
│       ├── components.md
│       └── framework.md
└── README.md

Utility Plugin

For tools and commands:

plugins/utility-name/
├── .claude-plugin/plugin.json
├── commands/
│   ├── action1.md
│   └── action2.md
└── README.md

Domain Plugin

For domain-specific knowledge:

plugins/domain-name/
├── .claude-plugin/plugin.json
├── skills/
│   └── domain-name/
│       ├── SKILL.md
│       ├── references/
│       └── scripts/
└── README.md

Command Naming

Subdirectory-based namespacing with : separator:

commands/namespace/command.md → /namespace:command

commands/simple.md → /simple

Examples:

commands/prime/vue.md → /prime:vue

commands/docs/generate.md → /docs:generate

Version Management

Important: Update version in BOTH locations:

plugins/<name>/.claude-plugin/plugin.json

.claude-plugin/marketplace.json

Use bump_version.py to automate.

Git Commits

Use conventional commits:

git commit -m "feat: add new plugin"
git commit -m "fix: correct plugin manifest"
git commit -m "docs: update plugin README"
git commit -m "feat!: breaking change"

Reference Docs

Detailed documentation included:

Reference
Content

references/plugin-structure.md
Directory structure, manifest schema, components

references/marketplace-schema.md
Marketplace format, plugin entries, distribution

references/workflows.md
Step-by-step workflows, patterns, publishing

Scripts

Script
Purpose

scripts/create_plugin.py
Scaffold new plugin

scripts/bump_version.py
Update versions