Session/Rollout Files

[OhadAssulin]

When using codex exec in the CLI, is it possible to specify the name of the rollout file or manually set the session ID?

[milisp]

I think Session ID is generated by OpenAI backend server. So if you change, they don't know which session had issues. If you just want to resume the session. You can write a small script do that.

[OhadAssulin]

I was considering configuring a custom session filename path locally (e.g., codex -c session_filename_path=<> exec "prompt"), so that later I can reuse this filename to resume the session.

[jazzyalex]

Not at the moment — the Codex CLI doesn’t support manually naming rollout files or setting a custom session ID.
The filenames (rollout-.jsonl) and internal "session_id" values are auto-generated when a session starts.

You can rename the files later for your own reference, but /resume will still rely on the original ID stored inside the JSONL. There’s no flag or API to override it yet.

If you want to browse, rename, or search sessions by project, you can use my open-source macOS app Agent Sessions — it reads Codex (and Claude Code) session logs locally and gives you a searchable interface with resume and limit tracking.