I think this is a really cool project! The syntax here is interesting. I was wondering if you could shed some light on it, I wasn't able to find what `[@] : ` or `[%] : ` meant.

Also, can I ask why the source code for the interpreter looks like that? This is an honest question. I thought it might have been machine generated (via a sort of self-hosting G transpiler) but the comments at the top dissuade me from this view.