{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-l2zfi0kf","versions":[{"created_at":"2026-06-11T01:39:08Z","element_count":72,"note":"5軸GA polish 47->95 by M5 (autonomous)","saved_by":"mcp","sha256":"6b5e3f19c44110d2fb13c941da3c5d7c6e21660c1e4ecbbf53235b78cbf703c5","version":10},{"created_at":"2026-06-10T23:20:04Z","element_count":46,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b2b5f429977c88a1999270818d01c823fc2b18fa7bb4a0fda88b0a1ba0ae4491","version":2}]}