We Switched From Claude Code to Codex: The Project Files That Preserved Context
We built our local company system with Claude, then opened the same workspace in Codex. Our founder asked a fair question: “How did Codex find everything Claude made—and can Claude take over again later?” The short answer is yes, with one important correction: the chat history did not transfer. The project state did. Codex read the files Claude had left in the workspace: operating rules, task history, decisions, failure notes, employee workflows, and a local database. That was enough to continue the work without pretending the two products shared a conversation. Here is the structure that made the handoff work, what still did not carry over, and the rules we now use before switching agents. What survived the switch The durable part of our setup lives outside any single chat. Shared source Purpose AGENTS.md Tells Codex which company instructions to follow CLAUDE.md Holds the company-wide operating rules skills/ Stores repeatable role and workflow instructions company/decisions.md...