Claude Plugins

A collection of plugins for Claude (Desktop/CoWork/Code) that bundle MCP server integrations with custom skills.

Available Plugins

Plugin	Description
lucid	Connect to Lucid (Lucidchart & Lucidspark) for creating and managing diagrams

Installation

These plugins work with both Claude CoWork and Claude Code (CLI).

Claude CoWork

Step 1. Open the Customize panel, select Connectors, then click Browse plugins.

Step 2. Switch to the Personal tab, click the + button, and select Add marketplace from GitHub.

Step 3. Enter Rosetree-Solutions/claude-plugins and click Sync.

Step 4. The Lucid plugin appears in the marketplace. Click Install.

Checking for updates

To refresh available plugins after new versions are published, click the ... menu next to the marketplace name and select Check for updates.

Claude Code (CLI)

1. Add the marketplace:

   /plugin marketplace add Rosetree-Solutions/claude-plugins
   

2. Install a plugin:

   /plugin install lucid@rosetree-lucid-plugin
   

After installation

The first time you use a plugin's MCP tools, you'll be prompted to connect your account (e.g., sign in to Lucid). Once authenticated, the plugin's skills are available automatically — ask Claude to "create a flowchart" or "find my Lucid diagrams" and the appropriate skill will activate.

Repository Structure

.claude-plugin/
└── marketplace.json            # Marketplace catalog (registers plugins for distribution)
plugins/
└── <plugin-name>/
    ├── .claude-plugin/
    │   └── plugin.json         # Plugin manifest (name, description, version, author)
    ├── .mcp.json               # MCP server configuration
    ├── .claude/
    │   └── settings.local.json # Permission allowlists for MCP tools
    └── skills/
        └── <skill-name>/
            └── SKILL.md        # Skill definition with instructions for Claude

• marketplace.json — Lives at the repo root in .claude-plugin/. Registers all plugins in this repository for distribution via /plugin marketplace add.
• plugin.json — Identifies an individual plugin and provides metadata (name, description, version, keywords).
• .mcp.json — Registers MCP servers (HTTP or stdio) that the plugin connects to.
• settings.local.json — Whitelists specific MCP tools and restricts external access (e.g., domain-scoped WebFetch).
• SKILL.md — Defines a skill with YAML front matter (name, description) and markdown instructions that guide Claude through a workflow using the plugin's MCP tools.

Contributing a New Plugin

1. Create a directory: plugins/<your-plugin-name>/
2. Add a .claude-plugin/plugin.json with at minimum:

   {
     "name": "your-plugin-name",
     "description": "What this plugin does",
     "version": "1.0.0",
     "author": { "name": "Your Name" }
   }

3. Add .mcp.json if your plugin uses an MCP server.
4. Add skills under skills/<skill-name>/SKILL.md for guided workflows.
5. Add .claude/settings.local.json to configure tool permissions.
6. Add your plugin to the root .claude-plugin/marketplace.json so it's discoverable.
7. Update the Available Plugins table in this README.