Probably it actually ran git checkout or reset. As you say git revert only operates on committed snapshots so it will all be in the reflog

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ewoodrich 5 hours ago | parent [-]

Yes, this exact scenario has happened to me a couple times with both Claude and Codex, and it's usually git checkout, more rarely git reset. They immediately realize they fucked up and spend a few minutes trying to undo by throwing random git commands at it until eventually giving up.

	▲	foobar10000 4 hours ago \| parent [-]
		Yeap - this is why when running it in a dev container, I just use ZFS and set up a 1 minute auto-snapshot - which is set up as root - so it generally cannot blow it away. And cc/codex/gemini know how to deal with zfs snapshots to revert from them. Of course if you give an agentic loop root access in yolo mode - then I am not sure how to help...