{"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-oxs2mbpr","versions":[{"created_at":"2026-06-30T00:51:16Z","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 / 吹抜 / ピアノ室防音仕様 / 南面廻り縁 / 高気密高断熱","saved_by":"mcp:create","sha256":"","version":1}]}