{"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-7x8nau6t","versions":[{"created_at":"2026-06-14T10:52:32Z","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 / 吹抜け / 縁側 / 茶室 / 雪除け工夫 / 隙間風防止","saved_by":"mcp:create","sha256":"","version":1}]}