Not entirely related, but using Git nonetheless: I recently wrote some proprietary software that uses LibGit2Sharp (a .NET wrapper around libgit2) to store user

Not entirely related, but using Git nonetheless: I recently wrote some proprietary software that uses LibGit2Sharp (a .NET wrapper around libgit2) to store user changes to text and some configuration in a Git repository. The text “diffs” very well by default. For the configuration (key/value pairs), I chose a subset of TOML. The API of libgit2 is great. If you don’t need the more advanced features of Git, I recommend taking a look!