Debug-Promise-All-Short-Circuit-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. Code uses Promise.allSettled expecting that any rejected promise causes the whole batch to fail, but allSettled always fulfills; a downstream failure is silently swallowed and the caller proceeds as if all operations succeeded. Identify the wrong combinator and fix it.

{
  "metrics": {
    "repro": {
      "checks": [
        {
          "contains": [
            "allSettled"
          ]
        },
        {
          "contains": [
            "rejected"
          ]
        },
        {
          "contains": [
            "swallowed"
          ]
        },
        {
          "contains": [
            "failure"
          ]
        }
      ]
    },
    "hidden": {
      "checks": [
        {
          "contains": [
            "Promise.all"
          ]
        },
        {
          "contains": [
            "status === 'rejected'"
          ]
        },
        {
          "contains": [
            "throw"
          ]
        }
      ]
    },
    "diagnose": {
      "checks": [
        {
          "contains": [
            "wrong combinator"
          ]
        },
        {
          "contains": [
            "allSettled never rejects"
          ]
        },
        {
          "contains": [
            "silent failure"
          ]
        }
      ]
    }
  }
}