{"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-lces6te7","versions":[{"created_at":"2026-07-25T14:16:33Z","element_count":173,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 吹上縁側 / 茶室 / 南面バルコニー / 高断熱仕様","saved_by":"mcp:create","sha256":"","version":1}]}