live_file = folder.parent / 'single-flight-live.json'
experiment = json.loads(live_file.read_text()) if live_file.exists() else {}
check('三个实际并发调用合并为两个真实上游请求', experiment.get('upstream_calls') == 2 and experiment.get('responses') == 3 and experiment.get('all_http_200') is True)
result = {'live_concurrency_experiment': experiment, 'explanation': output}
