Thanks to the near-heroic efforts of CyberShadow the unstable harmony branch is getting quite close to being able to run as an independent Bugzilla install.
For a number of reasons, bmo has a separate repo for managing its dependencies. Mostly this is about efficiency — dependencies change less often then the code, and we can have much faster builds and CI.
Note that the eventual goal is for the bmo and harmony repositories to be “nearly identical”, differing only in disabled extensions. That said, we need flexibility at times to experiment.