Looks really interesting. Is it wrapping git for the rollback and diffing stuff? If I were a user I'd probably opt to use git directly for that sort of thing.
Yes, it does use git underneath, with the idea of exposing a very simple subset of git functionality to the user. There's also some locking and transaction logic involved to ensure integrity and thread safety, so it wouldn't really be straightforward to expose the repo directly.
I tried to build the backend so that postgres, the file system, and git would combine to form effectively a single transactional database.
