If you're at all interested (though I'm not doing releases yet), I have a fork called 'write-xl' (https://github.com/adamharrison/write-xl), which does have a git plugin that autocommits+pushes to git on double save (double ctrl+s), as well as a bunch of other standard markdown creative writing stuff (bolding on ctrl+b, spellcheck, etc..) . I use it on my android tablet for creative writing, and have disabled a bunch of the more expensive computations to get a smoother experience.

Are you interested in releases for something like that?