{"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-23jqixf9","versions":[{"created_at":"2026-07-04T10:00:59Z","element_count":238,"note":"言葉から生成: 総2階(箱) / 狭小の町家・吹抜・坪庭 / 省エネ地域3適合(高断熱・気密) / 前面道路4m未満対策(2階突出禁止) / 吹抜(採光確保) / 坪庭(中庭) / 雪下ろしデッキ","saved_by":"mcp:create","sha256":"","version":1}]}