They use the same repo. And everything related (internal libs, code review system, issue tracking, code search, etc) comprises a lot of the shared infrastructur

They use the same repo. And everything related (internal libs, code review system, issue tracking, code search, etc) comprises a lot of the shared infrastructure. Are you suggesting "renting a space in the repo"? I guess it's possible, but would be weird and could have crazy risks depending on how hard you try to push on the "independent" angle.