The first time I had to sit down and write operating principles for two AI agents working on the same codebase, I had a moment of genuine déjà vu. It felt exactly like the early Foodora days. Too much speed, too little structure, and someone on the team absolutely certain they knew the fastest route even when the road wasn't built yet. Except this time the team is Claude and Codex. And I'm working from a laptop in my apartment. The setup, for context About a month ago I started this website. Since then I've been quietly adding to my tech stack, learning as I go. A few weeks in, I added OpenAI's Codex to the mix alongside Visual Studio Code and Claude. What started as curiosity became something that needed actual governance. Not because I'm precious about tools, but because two agents operating in the same environment without clear separation is a great way to end up with a codebase that looks like it was designed by a committee during a fire drill. So I did what I used to do in operations: wrote principles.…