{"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-h2tlqi4b","versions":[{"created_at":"2026-06-20T00:07:06Z","element_count":208,"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 / 玄関2箇所 / 水回り分離 / 高断熱高気密 / ロフトスペース","saved_by":"mcp:create","sha256":"","version":1}]}