{"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-h5giwcss","versions":[{"created_at":"2026-07-01T08:06:56Z","element_count":88,"note":"言葉から生成: 平屋(矩形) / ロフト付きワンルーム・吹抜・大開口 / ロフト付きワンルーム / 吹抜 / 南面大開口 / 高気密高断熱仕様","saved_by":"mcp:create","sha256":"","version":1}]}