Having never seen it, or anything even close to it. (Of course, I'm a little biased by seeing product demos that don't even get "add another item to this list of command line arguments" right; maybe if everyone already believes it works, nobody bothers to actually sell that?)

If the codebase is anything more than a simple Python project... I don't think that'll happen.

It just doesn't scale that well. Hell, GPT-4 can't make sense of my own projects.

Who can say what's possible but there are very few "debugging transcripts" for neural nets to train on out there. So it'd have to sort of work out how to operate a debugger via functions, understand the codebase (perhaps large parts of it), intuit what's going wrong, be able to modify the codebase, etc. Lots of work to do there.

Nobody wants to face the potential that their skills are going to greatly decrease in value.