{"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-a5nvre7t","versions":[{"created_at":"2026-06-30T18:29:35Z","element_count":128,"note":"言葉から生成: 中庭ロの字 / 茶室と縁側のある和の住まい / 茶室(床の間/炉端) / 縁側(三方開放) / 吹き抜け / 高断熱高気密 / 緑化中庭","saved_by":"mcp:create","sha256":"","version":1}]}