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The pre-write authoritative refetch narrowed but could not close the concurrent-definition-edit window: the store lock is released after the refetch and reacquired by the write, so a writer committing in that interval was still overwritten by a stale full-replacement input. Thread the editor's seed-time revision through UpdatePersonaRequest and compare it against the persisted persona inside the shared update_persona_with, while the same store lock that guards the write is held. Both the plain and publish edit paths get identical protection via find_persona_for_update. A mismatch is rejected before any mutation with a marked error the coordinator maps to the existing drift toast. Co-authored-by: Will Pfleger <pfleger.will@gmail.com> Signed-off-by: Will Pfleger <pfleger.will@gmail.com>