{"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-b7yfsa2n","versions":[{"created_at":"2026-07-26T12:37:03Z","element_count":179,"note":"言葉から生成: L字 / アトリエ兼住居・北面ハイサイド採光 / 北面ハイサイド採光 / 吹抜け / 高断熱・高気密 / 霜取り設置","saved_by":"mcp:create","sha256":"","version":1}]}