{"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-5odcos7y","versions":[{"created_at":"2026-07-22T09:19:25Z","element_count":167,"note":"言葉から生成: 中庭ロの字 / アトリエ兼住居・北面ハイサイド採光 / 北面ハイサイド窓 / 吹抜け / 断熱等級4","saved_by":"mcp:create","sha256":"","version":1}]}