Matthew has been working on a prototype (https://github.com/racket/rhombus-brainstorming/pull/163 https://github.com/racket/rhombus-brainstorming/pull/163) that

Matthew has been working on a prototype (https://github.com/racket/rhombus-brainstorming/pull/163 https://github.com/racket/rhombus-brainstorming/pull/163) that works on the current snapshot version of Racket. It is possible to use to write some basic things and most existing Racket libraries are usable with the prototype.