They've written most of the recent iterations of X11 bindings for Ruby, including a complete, working example of a systray for me.

They also added the first pass of multi-monitor support for my WM while I was using it (restarted it repeatedly while Claude Code worked, in the same X session the terminal it was working in was running).

You do need to reign them back in, sure, but they can often go multiple iterations before they're ready to make changes to your files once you've approved safe tool uses etc.