{"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-yforwvv5","versions":[{"created_at":"2026-07-02T14:12:29Z","element_count":133,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 吹抜付き広縁 / 床暖房 / 二重窓 / 平屋部分の茶室","saved_by":"mcp:create","sha256":"","version":1}]}