{"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-5a4giqse","versions":[{"created_at":"2026-06-17T12:02:19Z","element_count":168,"note":"言葉から生成: 総2階(箱) / 犬と暮らす土間広めの家・ドッグラン / 南側に吹抜付きLDK / 北面に土間広間 / 南側にドッグラン / 南側に中庭","saved_by":"mcp:create","sha256":"","version":1}]}