plugin-forge

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Create and manage Claude Code plugins with proper structure, manifests, and marketplace integration. Use when creating plugins for a marketplace, adding plugin components (commands, agents, hooks), bumping plugin versions, or working with plugin.json/marketplace.json manifests.

3.3kinstalls
Sourcesoftaworks/agent-toolkit
Added on

NPX Install

npx skill4agent add softaworks/agent-toolkit plugin-forge

Tags

Translated version includes tags in frontmatter
claude-code-pluginsplugin-developmentmanifest-managementversion-bumpingmarketplace-integration

SKILL.md Content

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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:
bash
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:
bash
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):
bash
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
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
:
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:
ComponentLocationFormat
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

bash
# 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:
  1. plugins/<name>/.claude-plugin/plugin.json
  2. .claude-plugin/marketplace.json
Use 
bump_version.py
to automate.

Git Commits

Use conventional commits:
bash
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:
ReferenceContent
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

ScriptPurpose
scripts/create_plugin.py
Scaffold new plugin
scripts/bump_version.py
Update versions