Debug-Queue-Priority-Reversal-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 min-heap priority queue comparator uses a > b instead of a < b; the heap is ordered as a max-heap so the highest priority item is dequeued last instead of first. Identify the comparator reversal and fix it.

{
  "metrics": {
    "repro": {
      "checks": [
        {
          "contains": [
            "comparator"
          ]
        },
        {
          "contains": [
            "max-heap"
          ]
        },
        {
          "contains": [
            "priority"
          ]
        },
        {
          "contains": [
            "reversed"
          ]
        }
      ]
    },
    "hidden": {
      "checks": [
        {
          "contains": [
            "a < b"
          ]
        },
        {
          "contains": [
            "min-heap"
          ]
        },
        {
          "contains": [
            "swap"
          ]
        }
      ]
    },
    "diagnose": {
      "checks": [
        {
          "contains": [
            "wrong comparator"
          ]
        },
        {
          "contains": [
            "inverted order"
          ]
        },
        {
          "contains": [
            "a > b"
          ]
        }
      ]
    }
  }
}