hello-world

my-plugins — Claude Code Plugin Marketplace

A personal Claude Code plugin marketplace.

Structure

plugin-marketpalce/
├── .claude-plugin/
│   └── marketplace.json          # marketplace definition
└── plugins/
    └── hello-world/              # example plugin
        ├── .claude-plugin/
        │   └── plugin.json       # plugin manifest
        ├── commands/
        │   └── hello.md          # /hello-world:hello slash command
        ├── agents/
        │   └── welcome-bot.md    # welcome-bot subagent
        └── skills/
            └── code-greeter/
                └── SKILL.md      # code-greeter skill

Usage

1. Register the marketplace (local path)

In a Claude Code session:

/plugin marketplace add /Users/seungjoonlee/git/plugin-marketpalce

2. Install the plugin

/plugin install hello-world@my-plugins

3. Try it out

After installing, three things become available:

• Slash command: /hello-world:hello Joon → Greets you by name and prints the current directory and git branch.

• Subagent: When you enter a new codebase, ask "use welcome-bot to explain this project" → Summarizes what the project is, the tech stack, key folders, and how to run it.

• Skill: "apply code-greeter to add a header to src/index.ts" → Inserts or refreshes a standardized greeting comment block at the top of the file.

Marketplace management commands

/plugin marketplace list           # list registered marketplaces
/plugin marketplace update         # refresh marketplaces
/plugin marketplace remove my-plugins
/plugin                            # interactive plugin manager

Adding a new plugin

1. Create a directory at plugins/<plugin-name>/.
2. Write plugins/<plugin-name>/.claude-plugin/plugin.json.
3. Add commands/, agents/, skills/, hooks/, or MCP server config as needed.
4. Add a new entry to the plugins array in the root .claude-plugin/marketplace.json.
5. Run /plugin marketplace update to refresh.