{"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-62lbpuuc","versions":[{"created_at":"2026-08-15T14:43:34Z","element_count":123,"note":"言葉から生成: 平屋(矩形) / 平屋の別荘・大きな軒・土間 / 吹寄せ土間 / 深さ1m以上の深さ有る軒 / 縁側 / 狭小中庭(採光・換気) / 基礎断熱","saved_by":"mcp:create","sha256":"","version":1}]}