create-plugin

Create Plugin

Add a new plugin to an existing Claude Code marketplace.

Gather info

Ask the user (use AskUserQuestion):

1. Marketplace — which marketplace to add to. List installed marketplaces from ~/.claude/plugins/marketplaces/ (exclude claude-plugins-official). User picks one.
2. Plugin name — short kebab-case slug. Becomes the colon-namespace prefix (e.g. devops → /devops:<skill>).
3. Description — one-line for plugin.json.
4. Category — one of: productivity, devops, ai, testing, documentation, or custom.

Scaffold

1. Locate marketplace

MP="$HOME/.claude/plugins/marketplaces/<marketplace-name>"

Verify $MP/.claude-plugin/marketplace.json exists.

2. Create plugin directory

$MP/plugins/<plugin-name>/
├── .claude-plugin/
│   └── plugin.json
└── skills/
    └── (empty — skills added via /plugin:create-plugin-skill)

3. Write plugin.json

{
  "name": "<plugin-name>",
  "description": "<description>"
}

4. Register in marketplace.json

Read $MP/.claude-plugin/marketplace.json. Append to plugins[]:

{
  "name": "<plugin-name>",
  "description": "<description>",
  "source": "./plugins/<plugin-name>/",
  "category": "<category>"
}

Use Edit tool — don't rewrite the whole file.

5. Commit + push

cd "$MP"
git add -A
git commit -m "feat: add <plugin-name> plugin"
git push

6. Install

Tell user to run:

/plugin install <plugin-name>@<marketplace-name>
/reload-plugins

7. Report

Print: plugin path, available namespace (/<plugin-name>:<skill>), next step (/plugin:create-plugin-skill to add skills).