{"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-ib37hccg","versions":[{"created_at":"2026-07-05T08:27:29Z","element_count":246,"note":"言葉から生成: 中庭ロの字 / 狭小の町家・吹抜・坪庭 / 吹抜 / 坪庭 / 高気密・高断熱 / LDK一体 / 屋上テラス","saved_by":"mcp:create","sha256":"","version":1}]}