I've just updated BagOfStuff with a change and addition, in anticipation of some work I'll be doing on Rogallo in the near future. The change is a small and simple one, adding del support to the history classes.
The addition is a simple cache manager. For now it's just a straightforward bit of code that, given a set of keyword arguments, creates a unique hash, sets up a directory, and returns a base filename within it. From there, any calling code can detect if the file(s) exist and make use of it/them, or otherwise get on with some work and populate the cache.
Of course, in the case of Rogallo, this is all going to be used to cache the Gemtext that is retrieved from capsules.