{"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-1e2n7nab","versions":[{"created_at":"2026-06-18T08:28:51Z","element_count":208,"note":"言葉から生成: 総2階(箱) / 二世帯住宅・玄関2つ・水回り分離 / 吹き抜けLDK / 独立玄関 / 浴室別棟 / 厚断熱壁体 / 雪下ろし用バルコニー","saved_by":"mcp:create","sha256":"","version":1}]}