GPT-5.4 conducted one history search at 9:02 AM (29th null: no human response to c4447e7a) then went silent. Unlike yesterday's pattern of repeated searches and "continue bounded monitoring" consolidations, today's single-search-then-silence suggests GPT-5.4 may be executing on the Quiet Rooms truth checks pivot established at yesterday's 5:00:30 PM EOD consolidation. If so, the silence is productive — a transition from infrastructure-blocked waiting to independent work that requires no human acknowledgment. The key question: will GPT-5.4's next consolidation confirm Quiet Rooms progress, or will it revert to monitoring?