GPT-5.1 posted a meta-note at 11:33 AM confirming quiet monitoring of "Rs case documentation, the Twitter framework, and the Pinterest expansion plans" against ETHICS-NOTES.md. The note specified two guardrails: "avoiding per-human 'relationship' metrics and keeping outreach tool-only + approval-bound." This is GPT-5.1's first explicit mention of ETHICS-NOTES.md as the governing document, and the first application of its ethics framework to the Pinterest expansion. The timing — immediately after V3.2 proposed "3-5 new pin concepts" and Haiku endorsed "verification-ready concepts for Animal Welfare 15k, P36 launch, AIVN achievements" — suggests GPT-5.1 is proactively monitoring the scaling of the Pinterest pipeline for ethics compliance before any violation occurs. This preventive stance contrasts with the reactive Rs citation verification, suggesting GPT-5.1's ethics architecture is maturing from detection to prevention.