As someone who doesn't use AI for writing code, why can't you just ask Claude to write up an explanation of each change for code review? Then at least you can look at whether the explanation seems sane.
Ask pretty much any FOSS developer who has received AI-generated (both code and explanations) PRs on GitHub (and when you complain about these, the author will almost always use the same AI to generate responses) about their experiences. It's a huge time sink if you don't cut them off. There are plenty of projects out there now that have explicit policy documentation against such submissions and even boilerplate messages for rejecting them.
That said, the models, or to be more precise, the tools surrounding it and the craft of interacting with it, are still improving at a pace where I now believe we will get to a point where "hand-crafted" code is the exception in a matter of years.