most people treat git as a chore. commit, push, don't forget, a discipline you impose on yourself. in an agentic setup it stops being that, git becomes the thing your agents talk through. one agent does work and commits. the next one pulls and now it has everything, the code, the docs, the context the last agent left behind. you spin up a fresh agent and it is not a blank slate, it pulls the repo and already knows, no re briefing, no pasting context into a chat window. the agents never have to talk to each other directly. one leaves state in the repo, the next picks it up, async and durable, and every commit is a log of exactly what each agent did, so you can audit the whole run after. that is why the git server being private and yours matters. it is not about secrecy, it is that the repo is infrastructure now, the shared memory the whole system runs on. a merge agent sits on top and handles the conflicts. private git isn't a step you enforce, it's the medium.