{"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-a94thikd","versions":[{"created_at":"2026-06-20T08:12:50Z","element_count":209,"note":"言葉から生成: 総2階(箱) / ピアノ室と防音・吹抜のある家 / ZEH基準の超高性能断熱(外皮系) / 室内完結型防音ピアノ室(二重壁) / LDK一体の吹抜","saved_by":"mcp:create","sha256":"","version":1}]}