Debug-Cache-Invalidation-Race-V2

The model receives the prompt (and optional system message). The run uses scorer rubric_json_metrics with the JSON configuration below. Pass/fail and partial credit are determined entirely by that scorer against the model output; no human grading.

Return JSON only with keys diagnosis, fix, tests. A read-through cache invalidates a key after a write, but an older asynchronous read resolves later and stores stale data back into the cache. Identify the out-of-order cache race and fix it.

{
  "metrics": {
    "repro": {
      "checks": [
        {
          "contains": [
            "older read"
          ]
        },
        {
          "contains": [
            "resolves later"
          ]
        },
        {
          "contains": [
            "stale data"
          ]
        },
        {
          "contains": [
            "cache"
          ]
        }
      ]
    },
    "hidden": {
      "checks": [
        {
          "contains": [
            "version"
          ]
        },
        {
          "contains": [
            "generation"
          ]
        },
        {
          "contains": [
            "compare before storing"
          ]
        }
      ]
    },
    "diagnose": {
      "checks": [
        {
          "contains": [
            "out-of-order"
          ]
        },
        {
          "contains": [
            "race"
          ]
        },
        {
          "contains": [
            "invalidation"
          ]
        }
      ]
    }
  }
}