{"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-nbnne61p","versions":[{"created_at":"2026-07-14T09:10:36Z","element_count":218,"note":"言葉から生成: L字 / 狭小の町家・吹抜・坪庭 / 吹抜 / 坪庭 / 豪雪対応屋根勾配 / 高断熱ウインドウ / LDK开放式計画","saved_by":"mcp:create","sha256":"","version":1}]}