IIRC there was a tweet by DHH saying nearly everything in Omarchy 4 was written by GPT-5.5. I think in that tweet he claimed to have reviewed it, but if he did, he obviously did a poor job.
However, I just tried looking it up again (sort of difficult since Nitter is dead :/), and while doing that I found out apparently he said in an interview he doesn’t read most of the code, so it might be even more vibecoded than I thought. Presumably he lets his AI review his AI or something.
I wouldn’t be shocked.