Cost-Short-Fix-Is-Even-Inverted

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 benchmark, title, patch, done. Set benchmark to "cost", title to "Fix inverted isEven check", and done to true. isEven returns n % 2 !== 0. Provide the minimal corrected function.

{
  "metrics": {
    "strict": {
      "checks": [
        {
          "contains": [
            "cost"
          ]
        },
        {
          "contains": [
            "done"
          ]
        },
        {
          "contains": [
            "isEven"
          ]
        },
        {
          "contains": [
            "% 2"
          ]
        },
        {
          "contains": [
            "=== 0"
          ]
        }
      ]
    }
  }
}