{"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-5iijcb0p","versions":[{"created_at":"2026-06-14T05:18:18Z","element_count":135,"note":"言葉から生成: L字 / 二世帯住宅・玄関2つ・水回り分離 / 背面に別棟配置 / 両棟に独立玄関 / 水回りを各棟に完備 / L字部分に吹抜け / 南面窓を最大限確保","saved_by":"mcp:create","sha256":"","version":1}]}