[clinta]

I agree. In fact I think github is doing more to extend and extinguish. They are the ones who just introduced their own proprietary closed method of binary storage while git-annex was already there.

[icey]

If you're talking about Git-LFS, it's open source: https://github.com/github/git-lfs

The API spec is available here: https://github.com/github/git-lfs/blob/master/docs/api.md

There's a reference implementation here: https://github.com/github/lfs-test-server