File checkpoint / revert

What variant of Codex are you using?

Codex with our Eclipse IDE plugin (codexide.org)

What feature would you like to see?

thread/rollback is marked _DEPRECATED_ and states in no uncertain terms that it only undoes the history : "Clients are responsible for reverting these changes."
There is no occurrence of checkpoint, revert, snapshot, or dryRun in the v2 schema.
A reliable "Undo Codex" is therefore impossible to offer, especially after shell commands.
The cumulative diff only exists at the turn level (turn/diff/updated), not at the thread level.

Additional information

_No response_