[ninininino]

Wow, it seems I'm the fool here.

I'm on Version: 2.6.19.

Per https://cursor.com/docs/configuration/worktrees#how-is-this-...

They apparently removed this in 3.0. - I couldn't begin to guess why.

"Automatic management of worktrees was removed in Cursor 3.0 and replaced with the new commands /worktree and /best-of-n. We also have added worktree support for the Cursor CLI.

Management of worktrees is now fully agentic. This makes it simpler to support use cases such as starting an agent, and only doing work in a worktree later on in the chat's lifecycle.

/best-of-n makes comparing the results of multiple models much easier. The parent agent will provide commentary on the different results and you can pick the best one. Additionally, you can even ask the parent agent to merge different parts of the different implementations into a single commit.

If you had agents that were previously running in a worktree, those chats will still work. However, you will need to use the new commands to start new agents in worktrees."