{"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-m3u3dnot","versions":[{"created_at":"2026-08-04T15:05:27Z","element_count":177,"note":"言葉から生成: 総2階(箱) / ロフト付きワンルーム・吹抜・大開口 / 2F吹抜 / 南面大開口 / 2Fロフト / 可変間仕切り","saved_by":"mcp:create","sha256":"","version":1}]}