We are drafting a spec so this will hopefully happen one day (still a work in progress). http://spec.harp.io/ http://spec.harp.io/ I think the big challenge w

We are drafting a spec so this will hopefully happen one day (still a work in progress). http://spec.harp.io/ http://spec.harp.io/ I think the big challenge will be with the languages themselves. LESS, Stylus, CoffeeScript, and Jade are all implemented in JavaScript. Finding C implementations would be tough. Though SASS has a C implementation.