It's a long, long LONG, way too long, like asked for 400 times too long, added to TODOs half that many time long, added, removed, tried again too long, didn't like it removed it back out too long, long time coming.
I've added per-device version printing to #uxn, uxemu, uxncli, uxn11, etc.. I'll increment the versions if I ever break anything again in the mailing list. This is version 1, for each device specs according to the docs. And this will be queriable from within a rom soon too.