{"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-k56qqqrf","versions":[{"created_at":"2026-08-15T20:28:09Z","element_count":174,"note":"言葉から生成: 総2階(箱) / 二世帯住宅・玄関2つ・水回り分離 / 中庭採光 / 玄関2つ / 水回り分離 / 高断熱ALC / 太陽光発電","saved_by":"mcp:create","sha256":"","version":1}]}