{"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-3zfdxe9j","versions":[{"created_at":"2026-07-13T11:36:04Z","element_count":169,"note":"言葉から生成: ロの字 / ロフト付きワンルーム・吹抜・大開口 / ECCE-1E (ECCE-1E) / ECCE-1E (ECCE-1E) / ECCE-1E (ECCE-1E)","saved_by":"mcp:create","sha256":"","version":1}]}