[octygen]

I'd more than happily contribute to such a project! Backgammon is to chess what boxing is to fencing and I love boxing.

[philshem]

there are lots of existing code that one could build on (e.g. https://github.com/quasoft/backgammonjs) but it probably makes sense to start from scratch, and use the gnubg smart game format ".sgf"

https://www.gnu.org/software/gnubg/manual/gnubg.html