I looked at the Github page and of course it's vibe coded. This is the sort of project that someone would have spent a few months doing as a learning exercise while they were reading through something like Crenshaw's "Let's Build a Compiler" series. I don't see the point of vibe coding it. You still end up with a toy compiler that nobody will actually use, except now you haven't learned anything about how compilers work. It's pointless.