The short answer
Usually, after a check. Might hold something you care about. Look inside before removing it.
What is it?
OpenAI’s Codex CLI records each session as a transcript (rollout) file in ~/.codex/sessions, organised in year, month and day folders. Heavy users can accumulate hundreds of MB.
Old session transcripts, grouped by year. Recent sessions are never touched; deleted ones cannot be resumed.
What happens if you delete it?
No. Deleted sessions cannot be resumed and their history is gone. Your code and Codex settings are not affected.
How to remove it properly
Quit Codex, then move old year or month folders to the Trash in Finder (Go › Go to Folder… ~/.codex/sessions).
Quit the app that uses it, then move it to the Trash. Empty the Trash when you’re sure.
- MoreRoom only suggests items unused for 60 days or more.
Before you delete it
Keep recent sessions you may want to resume with codex resume.
How MoreRoom helps
MoreRoom recognises this item and labels it “Review first”: it shows what’s inside, its size and last use, so you can decide. Nothing is removed without your say, and everything goes to the Trash first, with Undo.
Frequently asked questions
Is it safe to delete Codex CLI sessions in ~/.codex/sessions?
Usually, after a check. Might hold something you care about. Look inside before removing it. No. Deleted sessions cannot be resumed and their history is gone. Your code and Codex settings are not affected.
Will Codex CLI history come back after I delete it?
No. No. Deleted sessions cannot be resumed and their history is gone. Your code and Codex settings are not affected.
How do I remove Codex CLI history properly?
Quit Codex, then move old year or month folders to the Trash in Finder (Go › Go to Folder… ~/.codex/sessions).