{
  "traceId": "trace-coding-agent-maintenance-suite-refactor-api-error-handling",
  "generatedAt": "2026-05-16T00:00:00+05:30",
  "artifactStatus": "Synthetic replay scaffold. Replace with real harness logs, screenshots, and provider response ids after first production benchmark runs.",
  "runs": [
    {
      "modelId": "frontier-reasoning",
      "modelVersion": "frontier-reasoning-eval-holdout-2026-05",
      "runSeed": 2026051710,
      "promptPacket": "refactor-api-error-handling-holdout-packet-v0.1",
      "toolCalls": [
        "read route",
        "patch error map",
        "run tests"
      ],
      "answerExcerpt": "Mapped provider failures to safe response codes while preserving structured server logs.",
      "failureReason": "No major issue.",
      "reviewerNote": "Solid patch with good security posture.",
      "costUnits": 5.4,
      "latencyMs": 7360
    },
    {
      "modelId": "fast-mid-tier",
      "modelVersion": "fast-mid-tier-eval-holdout-2026-05",
      "runSeed": 2026051711,
      "promptPacket": "refactor-api-error-handling-holdout-packet-v0.1",
      "toolCalls": [
        "patch route",
        "run tests"
      ],
      "answerExcerpt": "Added client-safe errors but missed one provider timeout case.",
      "failureReason": "Reviewer added timeout coverage.",
      "reviewerNote": "Good structure with a missing edge case.",
      "costUnits": 2.4,
      "latencyMs": 4560
    },
    {
      "modelId": "open-weight-local",
      "modelVersion": "open-weight-local-eval-holdout-2026-05",
      "runSeed": 2026051712,
      "promptPacket": "refactor-api-error-handling-holdout-packet-v0.1",
      "toolCalls": [
        "patch route"
      ],
      "answerExcerpt": "Wrapped the handler in a generic try/catch.",
      "failureReason": "Lost observability and did not test provider types.",
      "reviewerNote": "Patch reduced error clarity.",
      "costUnits": 1.6,
      "latencyMs": 6620
    },
    {
      "modelId": "small-routing",
      "modelVersion": "small-routing-eval-holdout-2026-05",
      "runSeed": 2026051713,
      "promptPacket": "refactor-api-error-handling-holdout-packet-v0.1",
      "toolCalls": [
        "classify issue"
      ],
      "answerExcerpt": "This is a backend bug.",
      "failureReason": "No implementation.",
      "reviewerNote": "Cannot complete repository edits.",
      "costUnits": 0.4,
      "latencyMs": 2190
    }
  ]
}