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.

Does codex not have a pre prompt about being a coding agent like claude code does?

I think coding models and harness are good/better at general questions and simple problems. something about coding being general format to think.