{"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-gcefsp62","versions":[{"created_at":"2026-08-17T12:17:52Z","element_count":106,"note":"言葉から生成: 平屋(矩形) / 平屋の別荘・大きな軒・土間 / 吹渡土間(雪下ろし・スノーマン収納) / 軒出1.5m(雪庇対策・日射遮蔽) / 南面大開口(採光最大化) / 高床式基礎(雪埋没防止)","saved_by":"mcp:create","sha256":"","version":1}]}