Drops per-session identity hue. Geometry alone shows session count; color is one shared health signal applied uniformly: - hue slides green (0.35) → red (0.0) as awaiting/total climbs - saturation rises with urgency - brightness pulses harder the more urgent it is - all-stale state still wins: rotation freezes, color goes uniform gray, polygon blinks Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>