Exhausting in a GOOD way! I've been using Codex to review my existing Godot components framework at [0] and the project's modularity suits AI well: It can focus on one file/subsystem at a time. I don't use it to generate or edit any code but it has helped me catch a lot of bugs that would have taken me a long time on my own. I've been more productive than ever but boy it never seems to run out of flaws to point out in everything! I often have to ask it to overlook some issues/limitations as intentional so I can catch a break.

[0]: https://github.com/InvadingOctopus/comedot