{"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-tavo7oth","versions":[{"created_at":"2026-07-16T15:48:18Z","element_count":208,"note":"言葉から生成: 中庭ロの字 / 狭小の町家・吹抜・坪庭 / 2階吹抜 / 中央坪庭 / 高断熱高気密 / 複雑形状(複雑形状係数適用)","saved_by":"mcp:create","sha256":"","version":1}]}