Sync updates to imported external agent sessions - #36356
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copyberry[bot] merged 1 commit intoJul 31, 2026
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## 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
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Sync updates to imported external agent sessions
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
Testing
Added unit and app-server coverage for suffix planning, ledger checkpointing, concurrent updates, and unsafe targets that must be deferred.