{"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-7aylln7b","versions":[{"created_at":"2026-07-16T10:09:55Z","element_count":132,"note":"言葉から生成: 中庭ロの字 / 狭小の町家・吹抜・坪庭 / 吹抜け / 坪庭 / 高断熱 / 太陽光発電 / EV対応","saved_by":"mcp:create","sha256":"","version":1}]}