Shameless plug: I made a competing library to asciimath called mathup

https://mathup.xyz

Nice! I was confused about your "Why AsciiMath" section, which doesn't say anything about AsciiMath. It's also unclear to me what the difference is between Mathup and AsciiMath - you write that Mathup is inspired by it but it's not clear to me what made you invent something else - i assume AsciiMath has flaws that you're addressing? Would be worth writing down I suppose.