A whole circle is one closed edge now, so the outer wall and the hole wall each have a seam; the rig counts seam edges (4005, 4006), and 1c490ddd's count without them broke those cases. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017itGh5fpMEousnZ91cYcVt