{"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-7kfq6cs3","versions":[{"created_at":"2026-06-23T18:06:46Z","element_count":230,"note":"言葉から生成: L字 / 狭小の町家・吹抜・坪庭 / 吹抜 / 坪庭 / 多雪対応広縁 / 高断熱仕様 / 内側開口サッシ","saved_by":"mcp:create","sha256":"","version":1}]}