I don't know the OP here, but in my experience a junior dev at an average company would likely not do much more than the AI would. These aren't your grandfather's engineers, after all.
A junior dev wouldn't have produced output of such consistency, and they wouldn't have annotated their code nearly as well. The majority of code was better than I'd expect from a junior, and the comments were better than I'd expect from the majority of people at every skill level.
