{"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-flwp7m7d","versions":[{"created_at":"2026-06-15T17:52:16Z","element_count":90,"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 / 吹抜空間 / ロフト / 南面大開口 / 高断熱仕様 / 平屋建て","saved_by":"mcp:create","sha256":"","version":1}]}