{"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-tgrjbes2","versions":[{"created_at":"2026-07-03T21:40:09Z","element_count":131,"note":"言葉から生成: 平屋(矩形) / 平屋の別荘・大きな軒・土間 / 吹き抜けロフト / 広縁と土間 / 深さ1.5m以上の軒 / 南面採光窓 / 耐風設計","saved_by":"mcp:create","sha256":"","version":1}]}