Root cause of liminal seed 5 (measured): passage carve makes the bore air (+3.52), then the liminal route fill stamp
re-solidifies it (-0.16) where the deck crosses the tube. Three fixes cleared the bore but left 28-29 road stations
unsupported; none kept. New gate: zero solid samples inside any passage interior, with no-passage negative controls.
Owner v227 hashes and fast tier pass.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1
