That looks great. How does it compare to, say Hubot? That's what is running on TRC.

Well, the idea is that it will provide more functionality without the hassle of hosting it yourself. As to the specific commands, Hubot has more, at the moment, but Instabot's list is growing.

Perhaps creating a thin layer of middleware so that your work supports hubot scripts is a good idea, then!

Yep, but hubot scripts are already very short and easy to implement, so it shouldn't be much trouble either way!