Don't pitch your software as dependency free if it depends on a certain architecture. There's no need these days with llvm. Otherwise make it clear you actually wrote an arch specific assembler.
And I'm not "pitching my software", I'm sharing my side project, with a massive disclaimer that I'm doing it for fun.
I mean, GAS/x86-64 is cool, I enjoy toy languages as much as the next person—I just wouldn't describe it any other way than architecture-specific (and therefore useless to most people) so I don't have to click through if I can't play with it.