{"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-ac47atki","versions":[{"created_at":"2026-08-15T20:27:32Z","element_count":182,"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 / 南面大開口 / 高気密高断熱 / 雪荷重対策 / 太陽光発電","saved_by":"mcp:create","sha256":"","version":1}]}