{"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-kb8rqu89","versions":[{"created_at":"2026-06-13T14:48:37Z","element_count":73,"note":"5軸GA polish 46->95 by M5 (autonomous)","saved_by":"mcp","sha256":"409036b868073061c2039ff00acaf612a99bd1ac7478e3d8c85cd942ac5ed964","version":3},{"created_at":"2026-06-13T14:32:53Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"02be741f78a8a70ec8b5cb5455dc6a66934d56f64742fd7269df5ec678643b36","version":2},{"created_at":"2026-06-13T14:32:53Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}