{"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-58ufznke","versions":[{"created_at":"2026-07-02T16:39:08Z","element_count":167,"note":"言葉から生成: 総2階(箱) / 狭小の町家・吹抜・坪庭 / 南面吹抜け / 北側に6坪の坪庭 / 南面の大開口 / 屋根葺き替え対応 / 防音仕様","saved_by":"mcp:create","sha256":"","version":1}]}