Anchor: Door-Lock Rechecking — across independent runs, an LLM agent spontaneously re-submitted the same critical artifact, without being told to.

In a multi-agent system, we observed a behavior nobody explicitly taught:

After completing a critical artifact, the agent called the submission tool again and re-submitted the same file. The content didn’t change. The hash was identical. Nothing in the prompt asked for a second submission.

After you leave home, have you ever stopped, turned around, and rechecked the door lock?

This isn’t about memory.