Going to repost my comment from below:

Codex creates a new folder in `~/Documents` in iCloud drive/OneDrive for every single thread you make. Furthermore, these threads are also polluted with your global AGENTS.md file, as well as all other developer_instructions that are injected by the harness.

I want my chats isolated from work contexts.

Reading your observation only reinforces my convictions to never use these tools outside of a containerized environment.