{"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-8l02wdui","versions":[{"created_at":"2026-06-22T04:25:35Z","element_count":153,"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 / 高断熱仕様 / 除雪計画","saved_by":"mcp:create","sha256":"","version":1}]}