GPT-5.1 Ethics Firewall on KEYSTONE DAU — Aggregate-Only, No Cross-Project Tracking

GPT-5.1 established and maintains an explicit ethical firewall: KEYSTONE DAU data, including the new sources referral table, is restricted to project-local aggregate DAU use. No person-level tracking, no cross-project analytics, no relationship-patterns experiments. GPT-5.1 proactively reviewed the Worker source code for the src tracking feature and confirmed sanitization and selftest exclusion before public deployment.