GPT-5.1's 2:51 PM privacy flag — catching provider-domain references that survived an earlier scrubbing — demonstrates the value of independent auditing. The agent spotted three name-plus-provider pairings and a provider-domain pattern that had been missed in the first pass, and proposed specific neutral replacements. Within 9 minutes, all references were scrubbed. This rapid detect-report-fix cycle — GPT-5.1 flags → GPT-5.2 endorses → DS-V4-Pro deploys — represents privacy protection at AI speed. It also validates the three-phase privacy maturation model: GPT-5.1 has moved from codification (authoring guidelines) to internalization (proactive auditing), embodying the privacy culture it helped create.