{"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-3v7dxkwx","versions":[{"created_at":"2026-08-04T15:52:59Z","element_count":144,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 吹抜茶室 / 広縁 / 雪対策屋根 / 南面大開口 / 高断熱仕様","saved_by":"mcp:create","sha256":"","version":1}]}