{"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-8zlq9qli","versions":[{"created_at":"2026-06-14T22:01:45Z","element_count":208,"note":"言葉から生成: 総2階(箱) / 越屋根のある自然素材の家・通風重視 / 越屋根 / 吹抜 / 高窓 / 深さのある軒 / 断熱・気密高効率","saved_by":"mcp:create","sha256":"","version":1}]}