Layers may publish certified arrival/departure pads; the passage planner binds endpoints and tangents to them; no-pad layouts serialize unchanged (owner canonical hashes match v227). Pads removed the endpoint grade failures; seeds 0-4 passed at a 45 m margin, but seed 5 still has 289 blocked passage-capsule samples ~29 m before the departure pad, where the composed field stays solid (-0.162) inside the tube over native ground (-3.6). Ripple audit now keeps true route distance across masked gaps (with a synthetic control). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1