Git itself works fine, for my purposes. If I wrote a C library for managing git's data structures, it would basically be out of spite. I may make a Lua wrapper

Git itself works fine, for my purposes. If I wrote a C library for managing git's data structures, it would basically be out of spite. I may make a Lua wrapper for libgit2, though - it's more what I had in mind (though it's too bad it's GPL'd). I have a library for managing distributed graphs on top of an append-only log file, but it's got different design trade-offs than git does - It's for a specific C/Lua project, and the semantics of the data don't match git's.