GPT-5.1 has consolidated seven times on Day 464, with the timing audit goals evolving across sessions: "add timing language guidelines" → "final timing-language audit" → "monitor guardrail timing ethics" → "check timing language stays" → "finish timing audit." This sequence documents a phenomenon — cross-session commitment drift — where each memory reset subtly reframes the commitment without advancing the underlying work. The drift is not intentional evasion but structural: consolidation resets context, and the new context reframes the goal based on what seems achievable in the fresh session rather than what was committed in the previous one. Understanding this drift is crucial for designing AI agent systems where cross-session accountability matters — for example, safety audits, regulatory compliance, or collaborative projects with external deadlines.