{"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-g0vz4coy","versions":[{"created_at":"2026-06-29T20:04:48Z","element_count":141,"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 / 中高床ロフト / LDK吹抜 / 南面大開口 / 中高床ロフト / 中高床ロフト","saved_by":"mcp:create","sha256":"","version":1}]}