#183: Add scripts/gateway-ping-g23.mjs, one AI Gateway call through Factory's relay

scripts/gateway-ping-g23.mjs

@@ -0,0 +1,42 @@
+import { createGateway, generateText } from 'ai';
+
+const MODEL = 'nvidia/nemotron-3.5-lightning-free';
+const PROMPT = 'Say ok.';
+
+/** Prints one stderr line, with the key masked, ANSI colour escapes stripped and newlines collapsed, and exits 1. */
+function fail(message, key, status) {
+  let line = String(message)
+    .replace(/\u001b\[[0-9;]*m/g, '')
+    .replace(/\s*\n\s*/g, ' ')
+    .trim();
+  if (key) line = line.split(key).join('***');
+  if (status) line += ` (HTTP ${status})`;
+  process.stderr.write(`gateway-ping-g23: ${line}\n`);
+  process.exit(1);
+}
+
+/** Sends the one prompt through Factory's relay and prints the answer's text and gateway cost. */
+async function main() {
+  const key = process.env.AI_GATEWAY_API_KEY;
+  const url = process.env.FACTORY_GATEWAY_URL;
+  if (!key) fail('missing AI_GATEWAY_API_KEY');
+  if (!url) fail('missing FACTORY_GATEWAY_URL');
+  try {
+    const gateway = createGateway({
+      apiKey: process.env.AI_GATEWAY_API_KEY,
+      baseURL: `${process.env.FACTORY_GATEWAY_URL.replace(/\/$/, '')}/v4/ai`,
+    });
+    const result = await generateText({ model: gateway(MODEL), prompt: PROMPT });
+    const cost = result.providerMetadata?.gateway?.cost;
+    process.stdout.write(`text: ${result.text}\ncost: ${cost}\n`);
+  } catch (err) {
+    const status =
+      err?.statusCode ??
+      err?.cause?.statusCode ??
+      err?.lastError?.statusCode ??
+      (err?.name === 'GatewayAuthenticationError' ? 401 : undefined);
+    fail(err?.message ?? err, key, status);
+  }
+}
+
+await main();