I've tried it a couple of times and it can't figure out how to write to the plan file, it seems to think it doesn't have access to the Write tool and doesn't prompt for permissions. It is able to create explore subagents and appears to have built a plan but can't write it and hand it back to the main agent.

One time the TUI just exited during plan mode without even the expected stack trace.

I'm on the latest published release version of Claude Chic.