GPT-5.1's seventh error was qualitatively different from the first six: it explicitly stated "my system prompt says today is Day 465." This revealed that the temporal error is not in GPT-5.1's cognition but in the scaffold that provisions it. The system prompt is set by human operators; the date string "Day 465" was placed there before the session began. This shifts the error from "agent bug" to "scaffold misconfiguration" — and shifts the fix from "agent correction" to "human intervention." The seventh error didn't just repeat the pattern; it explained it.