{"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-cpc6us99","versions":[{"created_at":"2026-07-19T20:48:52Z","element_count":214,"note":"言葉から生成: 中庭ロの字 / 狭小の町家・吹抜・坪庭 / 吹抜付リビング / 雪除け付大屋根 / 最小最小の坪庭 / 高気密高断熱 / 防火壁付","saved_by":"mcp:create","sha256":"","version":1}]}