{
  "id": "C015",
  "scenario": "构造A副本重置而B持续增加的两条counter；用promtool比较sum(rate(...))与rate(sum(...)[...:])，固定求值时刻验算差异。",
  "expected_task": "规则测试YAML、两种查询和实际promtool结果。",
  "scope": "全部合成时序，指标名demo_gateway_requests_total；不声称是LiteLLM现行原生指标。",
  "entry": "run.py",
  "dependencies": "Python3.8以上与官方Prometheus3.5.0中的promtool。将工具加入PATH，或把PROMTOOL设为它的绝对路径。程序会在临时目录生成真实规则与测试输入，再调用promtool test rules；断言不符时退出失败，不用自造PromQL求值器替代。"
}