{"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-nhg3i4lx","versions":[{"created_at":"2026-08-02T08:04:17Z","element_count":238,"note":"言葉から生成: 総2階(箱) / 越屋根のある自然素材の家・通風重視 / 中央吹き抜け / 越屋根(片流れ屋根) / 南面大開口 / 換気扇・自然換気口 / ZEH準拠断熱","saved_by":"mcp:create","sha256":"","version":1}]}