Unfortunately I can't trust GPT will not hallucinate something, I tested it to code review my code and it hallucinated issues.

It would be great if you could give it old , ugly code and you could get something better.

Maybe Intellj guys can use this tools to increase their productivity and we can get 100% correct tools that work with AST not with tokens, and can do advanced transformations and review that you can trust without having to double check it.