End runs pass 48/48; overlap/turn census still fails; seam mismatches are real (one tile adds the passage carve, its neighbour's X8 fast path does not). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1