{"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-goxkdjmy","versions":[{"created_at":"2026-06-19T20:53:52Z","element_count":239,"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 / 越屋根 / 高窓 / 吹抜け / 土間 / 軒張り3m / 断熱等級4","saved_by":"mcp:create","sha256":"","version":1}]}