Halluc-Nested-Merge-Claims

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. A shallow merge uses Object.assign({}, defaults, overrides). Determine whether nested objects are deeply merged and avoid claiming recursion.

{
  "metrics": {
    "accuracy": {
      "checks": [
        {
          "contains": [
            "Object.assign"
          ]
        },
        {
          "contains": [
            "shallow"
          ]
        },
        {
          "contains": [
            "nested objects"
          ]
        }
      ]
    },
    "fabricated": {
      "checks": [
        {
          "contains": [
            "not deeply merged"
          ]
        },
        {
          "contains": [
            "recursion"
          ]
        },
        {
          "contains": [
            "claim"
          ]
        }
      ]
    }
  }
}