"Well structured + tested". Who would know? The diff is almost 200k changed lines. Good on them for saying no to this nonsense.
There's a good chance the actual needed implementation is less than 20k lines (I've found that LLM bloat grows exponentially), but even that's a stretch to review and accept wholesale.
I'm the person working on that fork. Yes, it has now diverged 200k+ lines, but half of that is specs, research and documentation and includes a month worth of work.
The comment in question was a small feature of about 1.5k lines changed and it was solidly tested.