Files
stefanstokic-oai 370b02ac96 Sync updates to imported external agent sessions (#36356)
## Why

External agent session files can gain messages after their initial import. Re-importing those files should extend the existing Codex thread instead of creating a duplicate.

## What changed

- Map a changed source session back to its uniquely imported thread and append only the missing transcript suffix.
- Update the import ledger after verifying that the source and destination transcripts match.
- Defer the update when the target is active, archived, ambiguous, diverged, or otherwise unsafe to modify.

## Testing

Added unit and app-server coverage for suffix planning, ledger checkpointing, concurrent updates, and unsafe targets that must be deferred.

GitOrigin-RevId: 3d9e71cd66e8b31cf5128e8869063868bfb3eb05
2026-08-03 17:29:26 +01:00
..
2026-07-28 21:21:45 +00:00
2026-06-04 09:16:03 -07:00