Python scripts for managing and automatically editing photos. Anything bigger and once the code reaches a certain point it starts actively breaking things, and in some cases, makes them unrecoverably worse. I have gotten benefit as a programmer being able to break down projects and spot when it's going down the wrong path, but I think you need quite a bit of experience to use AI on large codebases or with types of code it has few training examples of. I've also caught it 'fixing' code by essentially silencing errors without addressing the underlying problems.