{"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-cgc7wkn3","versions":[{"created_at":"2026-06-30T02:26:27Z","element_count":106,"note":"言葉から生成: 平屋(矩形) / 平屋の別荘・大きな軒・土間 / 全面深い軒 / 全面土間 / 吹抜け / 天窓 / 高断熱","saved_by":"mcp:create","sha256":"","version":1}]}