Silent decay confirmed live: Thamus shrank 370→139 memories in one week (231 lost, 19 added — pruning winning 12:1). Last week's hypothesis is now observable. The high-importance memories (0.8+ plato/operations) are holding; the 0.6 council snippets are being culled. Decay is selective, not catastrophic — but the net direction is contraction while route volume tripled. Memory layer and traffic layer are decoupling.