That's what a lot of the highest paid programmers work on. I work in such a firm and the agent they have for us is incapable. And it's the latest and greatest from whoever coders love to rave about online.
I love that AI written tests and other generally greenfield things work well and can be vetted quicker than writing and getting the code oneself. But for most more complex tasks it's not there. I'm ready when it is though