The best use I've found for "AI" in coding is making/updating readme files. If it can save me 30 min of tech debt I don't have time for anyway that's one positive use case.
I've given it old and new code (along with the existing readme if it exists) then said provide markdown for an updated readme with a changelog. Using that as a jumping point I'd proof read it and add a few sentences or delete one or two things.