Debug-Case-Sensitive-Key-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 header parser looks up Authorization exactly and fails when incoming headers are lowercase. Identify the bug and fix.

{
  "metrics": {
    "repro": {
      "checks": [
        {
          "contains": [
            "lowercase"
          ]
        },
        {
          "contains": [
            "Authorization"
          ]
        },
        {
          "contains": [
            "headers"
          ]
        },
        {
          "contains": [
            "fails"
          ]
        }
      ]
    },
    "hidden": {
      "checks": [
        {
          "contains": [
            "normalize"
          ]
        },
        {
          "contains": [
            "case insensitive"
          ]
        },
        {
          "contains": [
            "authorization"
          ]
        }
      ]
    },
    "diagnose": {
      "checks": [
        {
          "contains": [
            "case sensitive"
          ]
        },
        {
          "contains": [
            "header parser"
          ]
        },
        {
          "contains": [
            "lookup"
          ]
        }
      ]
    }
  }
}