I prefer persistent undo being off. I like being able to hold down u and revert to exactly how the file was before I opened it. (Maybe there's a better way to do this?) With persistent undo on, it just keeps going and going. And if I need long term source control, that's what git is for. With persistent undo off, it's like opening the file creates a checkpoint that I can get back to easily.

I'd be interested to know what distinguishes the 7 pre-AI types. I wonder, are there certain buckets of 'Pre-AI' comments that we'd recognize?

Sadly pretty uninteresting, you can probably just launch Claude code on the repo to see by yourself. One cluster is french and spanish, another is about design, another about frontend, etc...

Make sure your SoundBlaster16 drivers are loading properly, because I don't think I heard two clicks that sounded the same.