I'm looking for repositories of “reproducible security analytics”.

As an addict of Emacs Org mode, one of the papers that got me started thinking along these lines was A Multi-Language Computing Environment for Literate Programming and Reproducible Research. I realize for most of the rest of the world this vision is now realized more in things like Jupyter and Zeppelin notebooks. Your loss :-)

One thing that looks promising is mitre's cyber analytics repository. Another is Hunters Forge/Mordor I'd be interested in pointers to more.