{"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-fdeec3hs","versions":[{"created_at":"2026-07-14T17:16:19Z","element_count":187,"note":"言葉から生成: 総2階(箱) / 狭小の町家・吹抜・坪庭 / 吹抜 / ピクチャーウインドウ / 高気密高断熱 / 南面採光","saved_by":"mcp:create","sha256":"","version":1}]}