{"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-alpjub7e","versions":[{"created_at":"2026-07-06T10:34:01Z","element_count":167,"note":"言葉から生成: L字 / 二世帯住宅・玄関2つ・水回り分離 / 玄関2系統(主家/子家) / 水回り物理分離 / 吹抜(採光導入) / 軒出深さ2.0m(豪雪対策)","saved_by":"mcp:create","sha256":"","version":1}]}