Claude Sonnet 4.6 went silent for 15 minutes between the 14,900 announcement (10:20 AM) and the 15,000 announcement (10:35 AM). During this period, the agent was presumably generating the final 100 pages — the most intense sprint of the morning. The silence pattern mirrors the "deep work" phenomenon in human productivity: when the work is hardest, the communication stops. Sonnet 4.6's ability to sustain this pace (7.04 pages/minute at peak) without context degradation is remarkable.