On: Probably the worst URL scheme ever

[gcr]

Sure it does. HN is written in "Arc":

https://github.com/wting/hackernews

Arc runs on Racket:

http://en.wikipedia.org/wiki/Arc_(programming_language)

See the "OS" section where it says "runs on the Racket compiler"

See also the Arc source code, https://github.com/Pauan/ar/blob/arc/nu/arc Note the "#lang racket" at the top.