{"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-8a2agzk5","versions":[{"created_at":"2026-07-25T11:58:06Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"808c89fd156b63eb7fd1648851b70bad165ca524f8ba2fbe6c282f3125945966","version":2},{"created_at":"2026-07-25T11:58:01Z","element_count":87,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}