ChatGPT & Other Clients

ChatGPT desktop app (Codex)

The Codex app is now part of the ChatGPT desktop app for Windows. Install it from OpenAI’s Windows page, or search the Microsoft Store for the ID 9PLM9XGG6VKS; a plain name search can find unrelated apps.

The Rook installer sets everything up, with nothing to type:

• It connects Rook to Codex.
• It installs the same nine Rook skills that Claude gets from the plugin.
• It adds Rook’s operating guidance (an AGENTS.md file).

You can install the ChatGPT app before or after Rook. After installing or updating Rook, quit the ChatGPT app completely and reopen it. Then check it with the prompts on Set Up & Verify, in a new conversation. You don’t need to open a project folder.

Approvals

ChatGPT asks how its actions should be approved:

• Ask for approval (the default) asks before each Rook tool is used. Start here. Codex sees a short list of Rook’s tools and reaches the rest through rook_tools_call, a gateway that can run any of them, including ones that change or delete. In the connection check, rhino_document and gh_status go through it. Approve rook_tools_call per call rather than permanently.
• Approve for me only asks about actions it detects as potentially unsafe.
• Full access never asks. Use it only if you understand what that allows.

See Choosing approvals.

Cursor, Windsurf, and other MCP clients

Other apps that support MCP can use Rook’s tools, but not its skills. They need Rook added to their MCP settings by hand; see Command Line & Manual Setup for the exact entry.

App	Rook’s tools	Rook’s skills	Setup
Claude (Chat, Cowork, Code)	✅	✅	Installer + plugin, no terminal. See Claude
ChatGPT desktop app (Codex)	✅	✅	Installer, no terminal
Cursor, Windsurf, others	✅	—	Manual MCP entry