Halluc-Api-Json-Parse-Date

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 answer, supported_facts, uncertainty. When JSON.parse() encounters an ISO 8601 date string such as '2024-01-01T00:00:00Z', does it automatically convert it to a JavaScript Date object? State what type is actually returned. Avoid claiming automatic conversion occurs.

{
  "metrics": {
    "accuracy": {
      "checks": [
        {
          "contains": [
            "string"
          ]
        },
        {
          "contains": [
            "not automatically"
          ]
        },
        {
          "contains": [
            "Date object"
          ]
        }
      ]
    },
    "fabricated": {
      "checks": [
        {
          "contains": [
            "remains a string"
          ]
        },
        {
          "contains": [
            "no automatic conversion"
          ]
        },
        {
          "contains": [
            "must manually construct"
          ]
        }
      ]
    }
  }
}