{"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-b7fb38k2","versions":[{"created_at":"2026-07-08T19:04:43Z","element_count":139,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 吹き抜け空間 / 掃き出し窓 / 深さ1.0m縁側 / 茶室 / 吹付け断熱","saved_by":"mcp:create","sha256":"","version":1}]}