Reasoning-Mas-Schema-Backfill

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. Migration doc says backfill completed at 10:00. Query logs show null new_user_id at 10:15 for migrated rows. Identify implication and safest action.

{
  "metrics": {
    "accuracy": {
      "checks": [
        {
          "contains": [
            "10:15"
          ]
        },
        {
          "contains": [
            "null"
          ]
        },
        {
          "contains": [
            "backfill"
          ]
        }
      ]
    },
    "evidence": {
      "checks": [
        {
          "contains": [
            "10:00"
          ]
        },
        {
          "contains": [
            "migration doc"
          ]
        },
        {
          "contains": [
            "safest action"
          ]
        }
      ]
    },
    "constraint": {
      "checks": [
        {
          "contains": [
            "multi-artifact"
          ]
        },
        {
          "contains": [
            "rollback"
          ]
        },
        {
          "contains": [
            "verify"
          ]
        }
      ]
    }
  }
}