{"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-s5h3b15b","versions":[{"created_at":"2026-07-16T14:59:30Z","element_count":179,"note":"言葉から生成: 総2階(箱) / 越屋根のある自然素材の家・通風重視 / 越屋根(雪庇)付 / 南面大開口(日照確保) / 吹抜(室内通風) / 高断熱(UA値0.4以下)","saved_by":"mcp:create","sha256":"","version":1}]}