{"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-art51vct","versions":[{"created_at":"2026-07-16T02:57:03Z","element_count":171,"note":"言葉から生成: 中庭ロの字 / サウナと水風呂のある家・薪ストーブ / 遮熱サッシ / 太陽熱温水器 / 自然換気","saved_by":"mcp:create","sha256":"","version":1}]}