[d3nj4l]

Looks great - but since you mention you're inspired by Sorbet, why not use their type annotations instead of rolling your own with Rubyspeed::T? (I don't know too much about C, so this might be obvious to some)

Otherwise, I'm excited to try this out. I don't really have any performance-sensitive ruby personal projects, but with time and improvements pushing this to a production-ready state this could be a lifesaver in production for computationally heavy parts of a rails codebase.

[agrafix]

I think it's possible, mostly didn't go down that route to keep things as simple as possible at first.

[ClikeX]

Or the .rbs files that are supposed to come at Christmas.