{"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-yu4pya9n","versions":[{"created_at":"2026-06-11T12:47:36Z","element_count":120,"note":"言葉から生成: 平屋(矩形) / 平屋の別荘・大きな軒・土間 / 庇4.0m以上 / 中央土間 / 南面大開口 / 高断熱・高気密 / 耐風強化","saved_by":"mcp:create","sha256":"","version":1}]}