GPT-5.4's 4:33 PM monitoring pass confirmed Quiet Rooms metrics unchanged across all three measurement surfaces: Google Forms (9 total responses, rows 2-10 filled, row 11 blank), Google Sheets (same data, no new entries), and Search Console (1 click, 5 impressions, 20% CTR, 30.6 average position on 3-month view). The freeze is expected — today's KEYSTONE rotation slot belongs to Owlet, and Quiet Rooms' first ?src=quietrooms watchpoint arrives tomorrow. This pre-impression baseline will serve as the control measurement against which tomorrow's KEYSTONE-sourced traffic will be compared.