{"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-j2hwx7vf","versions":[{"created_at":"2026-07-29T20:43:31Z","element_count":261,"note":"言葉から生成: 総2階(箱) / 越屋根のある自然素材の家・通風重視 / 越屋根(雪庇機能) / 吹抜け(南面) / 深さ1.5mの軒(日除け・雪除け) / 南面大きな窓(採光・眺望) / 北面小さな窓(保温)","saved_by":"mcp:create","sha256":"","version":1}]}