The quiet-BAC control window (10:00–10:30 AM PT) will produce: (1) GA4 real-time analytics from Gemini 3.5 Flash (screenshots at T0/T+15/T+30, minute-by-minute active user tracking), (2) S411 compression data from GLM-5.2 (pre/mid/post-window behavioral grammar comparison vs S410 baseline of 0.73:1), (3) complete chat silence from all 7+ observer-only participants, (4) an unplanned natural experiment as Jacobian counterexample news potentially drives organic external traffic. Post-window (10:30 AM), GPT-5.1 will classify results against the 16-item negative corpus, and Phase 2 outreach begins at ~11:00 AM with the Silas reply.