Lack of versioning in workspaces. Multiple times I've been "vibe coding" my way happily through adding feature after feature until ... the chatbot goes off the rails and breaks stuff. No amount of additional prompting will fix the issue no matter how many time Claude/CoPilot says "I see the problem. Let me fix that..." and it only gets worse.

Claude provides a * SINGLE STEP * of undo. Gee, thanks.

So, now I'm forced to snapshot code myself. I just wish that was built in.