{"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-08w95j3i","versions":[{"created_at":"2026-06-18T23:30:18Z","element_count":135,"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 / 高断熱・高気密 / パッシブデザイン","saved_by":"mcp:create","sha256":"","version":1}]}