Every Claude Code session starts cold. The spec someone wrote six weeks ago sits in a doc nobody reopens, so the code drifts away from it quietly and you only catch it in review, or in production.

One shared repo brain holds the specs, the decisions, the reviews and every past session. New sessions start from what the team already decided, and a routine checks each pull request against the spec that covers those files.

Everyone does their own research and keeps their own call notes. What the customer asked for, what you promised, and the worry that keeps coming up are spread across seven places and shared in none of them.

Calls, emails and chats turn into one page per customer that the whole team can search. When the same worry comes up again, the owner hears about it before the renewal call, not after it.

How the work gets done lives with the person who has done it before: what comes first, the exception you always hit, who to call. Write it down once and it is out of date by next quarter.

The steps become a saved playbook your team and your AI can both follow. When someone does it a better way, the playbook gets a new version with the reason attached, so nobody is following an old copy.

What you say about the product drifts from what it does, because the people writing it are not in the room when it changes. Finding out means interrupting someone, and the answer comes back in language you cannot use.

The team that builds it shares what it knows into the same workspace, so a routine can read what shipped last week and write the customer version, with every claim traced back to where it came from.