用 Jev 检查调研结论：证据是否足以支持主张？

// Node.js 20+. Save as jev-example.mjs and run: node jev-example.mjs
// Set OMNIAKEY_API_KEY in the server/terminal environment first.
const key = process.env.OMNIAKEY_API_KEY;
if (!key) throw new Error("Set OMNIAKEY_API_KEY before running.");

const body = {
  "model": "jev-latest",
  "state": {
    "claim": "This order qualifies for an expedited refund under the policy",
    "evidence": [
      "Order arrived three days late",
      "Policy requires five days"
    ],
    "source_quality": "mixed",
    "stakes": "medium"
  },
  "questions": {
    "verdict": {
      "type": "choice",
      "instructions": "Judge whether the supplied evidence supports the claim, considering coverage, contradictions, source quality, timeliness, and stakes. Do not invent missing sources or facts.",
      "criteria": {
        "sufficient": "The evidence adequately supports the claim at the stated stakes.",
        "insufficient": "Evidence is missing, incomplete, or too weak to support the claim.",
        "contradictory": "The evidence materially contradicts the claim or conflicts internally.",
        "stale": "The evidence is too old for a time-sensitive claim."
      }
    }
  }
};

const response = await fetch("https://api.omniakey.com/v1/alpha/search", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${key}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify(body),
  signal: AbortSignal.timeout(25_000),
});
if (!response.ok) {
  const retryAfter = response.headers.get("retry-after");
  throw new Error(`Jev HTTP ${response.status}; Retry-After: ${retryAfter ?? "not supplied"}`);
}
const result = await response.json();
console.log(JSON.stringify(result, null, 2));
// Inspect and validate the answer before connecting it to any external action.