Hi, I'm on team that worked on this. No it's not vibe coded. We do pretty intense code review of every PR. It looks like the number you're seeing is including lock files and artifacts that are not part of the core coverage.
Nevertheless, AI use is not what really stood out to me. It’s that it’s SO MUCH CODE. I have no idea how you guys maintain or reason about the quality or security of something like this. Good luck, I guess.