scriptCtx and MPXContext

I seem to recall a thread about somebody doing a more pythonic implementation of MPXcontexts for building tools in python. I’ve been dinking around with my old enemy scriptCtx and its just as bad as I remember -how is that in 2015 we still can’t pass in a python callback?!?! So I’m thinking of doing more MPXcontexts instead, but the thought of all that boilerplate is driving me nuts.

Do anyone recall the thread about an MPXContext factory class? or am I just hallucinating?

I think I saw something like that before, was it maybe something pymel did when it wrapped it?