{"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-z373qv2z","versions":[{"created_at":"2026-07-02T03:48:06Z","element_count":129,"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 / ロフト / 大開口 / 高気密・高断熱(地域8基準) / 採光確保(1/7以上)","saved_by":"mcp:create","sha256":"","version":1}]}