An agent log can tell you what the process claims happened. It does not prove that the record is complete, ordered, or unchanged. That distinction matters after a failed deployment, a suspicious tool call, or a customer asking who approved an external side effect. A timestamped JSON file is useful for debugging. It is weak evidence if a worker can overwrite it, two processes can emit the same sequence number, or a restart can silently drop the events between decision and dispatch. The prac...