Underlying writes go to Git, Mercurial and SVN. Generally speaking, we proxy requests and pass them through to the VCS after performing authentication and broa

Underlying writes go to Git, Mercurial and SVN. Generally speaking, we proxy requests and pass them through to the VCS after performing authentication and broad permission checks. Requests are rewritten slightly to remap user-facing display paths to actual paths on disk. Some additional features act through commit hooks.