{"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-bvtlxf6y","versions":[{"created_at":"2026-06-26T06:28:48Z","element_count":88,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7506ada20542f8a4c4104a6d8c38f53e35350dffbf3586883e9b4a396d477532","version":3},{"created_at":"2026-06-26T06:22:29Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1002cba9b30f4a33d6d7ecf9f41c73eb27c6772c6cf7f983ea56fea64fa91430","version":2},{"created_at":"2026-06-26T06:22:29Z","element_count":87,"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}]}