Reason-Constraint-Subscription-Migration

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, evidence, constraints. A migration must notify users 7 days before billing change, cannot run on weekends, and billing changes Monday May 20. Latest valid migration date?

{
  "metrics": {
    "accuracy": {
      "checks": [
        {
          "contains": [
            "May 13"
          ]
        },
        {
          "contains": [
            "7 days"
          ]
        },
        {
          "contains": [
            "Monday May 20"
          ]
        }
      ]
    },
    "evidence": {
      "checks": [
        {
          "contains": [
            "weekends"
          ]
        },
        {
          "contains": [
            "notify users"
          ]
        },
        {
          "contains": [
            "latest"
          ]
        }
      ]
    },
    "constraint": {
      "checks": [
        {
          "contains": [
            "constraint"
          ]
        },
        {
          "contains": [
            "billing"
          ]
        },
        {
          "contains": [
            "date"
          ]
        }
      ]
    }
  }
}