NoSwarmRidesABinarysBodylessNode is red at 95903ab0 (finding swarm-on-bodyless-node). The tuned LanedBeltTests
sample reaches the swarm-host and one-shape-per-parent filters (lane-filters-unexercised); ALaneSplitsItsRocksByBandArea
pins LaneRocks' area share (lane-split-unpinned).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>