{"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-47m8rbw4","versions":[{"created_at":"2026-07-06T03:55:27Z","element_count":139,"note":"言葉から生成: L字 / 狭小の町家・吹抜・坪庭 / 北側吹抜 / 南面坪庭 / 高窓採光 / 断熱等級6","saved_by":"mcp:create","sha256":"","version":1}]}