A lot of it has not been written yet but you can help write it! Maybe you can add the next skill? (I just released Mining!) Maybe you can help create the Monsters class? So much to do.
It's been in development since early 2018 but has only seriously been worked in in the past few months when I have time.
We have documentation (somewhat) available. But, you can download it and just poke around if you'd like. It has a Node.js server, too!
Appreciate @BenHalpern for helping me find this place and I hope to collaborate with some of you and discuss ideas/tech here, too.