{"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-m8k1nutx","versions":[{"created_at":"2026-07-22T02:52:00Z","element_count":224,"note":"言葉から生成: 総2階(箱) / ロフト付きワンルーム・吹抜・大開口 / 吹抜空間 / 大開口ガラス窓 / ロフト空間 / 高断熱仕様","saved_by":"mcp:create","sha256":"","version":1}]}