Cost-Analysis-Date-Off-By-One

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, diagnosis, fix, done. Set benchmark to "cost", title to "Fix off-by-one in days-between calculation", and done to true. A date range counts both endpoints when it should count elapsed days. Diagnose and fix.

{
  "metrics": {
    "strict": {
      "checks": [
        {
          "contains": [
            "cost"
          ]
        },
        {
          "contains": [
            "done"
          ]
        },
        {
          "contains": [
            "elapsed"
          ]
        },
        {
          "contains": [
            "endpoint"
          ]
        },
        {
          "contains": [
            "days"
          ]
        }
      ]
    }
  }
}