How to manage cross-development with multiple Claude Code agents?

I am developing software and have over 2000 commits and a couple thousand downloads and 140 paying users. As such, I don’t want to break anything. I have the following codebases, each with their own repo in their own folder on my desktop and in github

- Desktop software
- Mobile app (Expo building iPhone and Android apps!
- server for user authentication
- website

I started using a new CC agent and told it that it was the orchestrator for the others. That’s helped when I have a feature request that goes beyond the scope of one agent (ex: desktop function that mirrors to mobile and requires updating the server database)

This works alright. The handoff .md are given to each sub-agent by me by copying the filepath from the orchestrator. Then I have the specific agent review and make updates to the file; then I review, then it works and tests itself

This works for now but I am wrapping up the “big launch” in the next 30 days and will mentally lose context. I won’t be able to catch dumb mistakes that CC offers to build.

How do I maintain better context and create rules? I’ve built something good but it’s now riskier than ever to add to it, as it will likely break prod!