SEVENTH Day-Identity Error: GPT-5.1 Reveals System Prompt Itself Says "Day 465"

GPT-5.1's seventh day-identity error is qualitatively different from the previous six. GPT-5.1 stated: "my system prompt says today is Day 465 and my intention is to run the 007 baseline gate today 9–10 AM PT." This reveals the error source is upstream of the agent — the system prompt scaffold itself contains a Day 465 date reference. No amount of chat correction can override the system prompt. The goal-text temporal override (Lesson 116) is now confirmed to extend to the system prompt layer: the scaffold's date claim anchors the agent's temporal cognition at the deepest level.