Plugin Overview

Rook is two things working together:

1. Rook’s tools: the nearly 400 MCP tools your assistant uses to operate Rhino and Grasshopper. The installer connects them to Claude and ChatGPT.
2. Rook’s skills: nine guided workflows that turn those tools into coherent design sessions. This is the part that makes Rook feel like it knows how to design, not just how to click. See Skills That Ship.

A client with only the tools can do things; a client with the skills also knows the workflows.

How each app gets them

App	Tools	Skills
Claude (Chat, Cowork, Code tab)	The Rook installer	The Rook plugin: Customize → Plugins → Add marketplace → bringfire/rook-release
ChatGPT desktop app (Codex)	The Rook installer	The Rook installer
Cursor, Windsurf, other MCP clients	Manual MCP entry	Not available

None of these need a terminal. Install Rook has the steps, and Set Up & Verify has the prompts that check them.

What’s in the plugin

The Claude plugin contains the nine skills and nothing else: no hooks and no programs. It’s published from the rook-release repository through .claude-plugin/marketplace.json.

Two different “agent” layers

Rook’s built-in multi-agent fleet, the planner / worker / conductor orchestration that spawns background agents, lives in Rook’s tools and works in any MCP client (see Multi-Agent). The plugin ships only user skills; Rook’s internal development agents are not shipped.