{"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-918g7vtd","versions":[{"created_at":"2026-07-04T05:55:52Z","element_count":147,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 中央吹抜け茶室 / 南面全面縁側 / 雪囲い対応ロフト / 土間玄関 / 断熱等級4","saved_by":"mcp:create","sha256":"","version":1}]}