{"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-iec0fy4h","versions":[{"created_at":"2026-07-06T00:40:09Z","element_count":254,"note":"言葉から生成: L字 / 狭小の町家・吹抜・坪庭 / 路地側吹抜け / 四季折々の坪庭 / 防音確保の厚壁 / 自然換気路 / 眺望確保のスキマ","saved_by":"mcp:create","sha256":"","version":1}]}