{"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-6evamvw7","versions":[{"created_at":"2026-07-27T02:21:07Z","element_count":183,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 吹抜付き縁側(南面) / 独立茶室(2F) / 断熱等級4(寒冷地仕様) / 除雪用スロープ","saved_by":"mcp:create","sha256":"","version":1}]}