{"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-ckywy5gs","versions":[{"created_at":"2026-07-01T00:51:02Z","element_count":102,"note":"言葉から生成: 平屋(矩形) / 平屋の別荘・大きな軒・土間 / 吹抜 / 深い軒 / 土間 / 雪庇対策 / 高気密高断熱","saved_by":"mcp:create","sha256":"","version":1}]}