The connection check only reads from Rhino.
This test goes one step further: it creates a small test sphere, confirms it
exists, then deletes it, which proves Rook can change your model as well as read
it. It works the same in Claude and in the ChatGPT desktop app.
Run it in an empty or saved model. Whether your app asks before the create and
delete steps depends on the app and its approval setting. If it asks, choose
Allow once. Claude Cowork and ChatGPT’s Full access mode don’t ask at all.
See Choosing approvals.
If anything fails, the
troubleshooting prompt
reads Rook’s logs and tells you what to fix.