Add Patronus

content/providers/05-observability/patronus.mdx

@@ -0,0 +1,134 @@
+---
+title: Patronus
+description: Monitor, evaluate and debug your AI SDK application with Patronus
+---
+
+# Patronus Observability
+
+[Patronus AI](https://patronus.ai) provides an end-to-end system to evaluate, monitor and improve performance of an LLM system, enabling developers to ship AI products safely and confidently. Learn more [here](https://docs.patronus.ai/docs).
+
+When you build with the AI SDK, you can stream OpenTelemetry (OTEL) traces straight into Patronus and pair every generation with rich automatic evaluations.
+
+## Setup
+
+### 1. OpenTelemetry
+
+Patronus exposes a fully‑managed OTEL endpoint. Configure an **OTLP exporter** to point at it, pass your API key, and you’re done—Patronus will automatically convert LLM spans into prompt/response records you can explore and evaluate.
+
+#### Environment variables (recommended)
+
+```bash filename=".env.local"
+OTEL_EXPORTER_OTLP_ENDPOINT=https://otel.patronus.ai/v1/traces
+OTEL_EXPORTER_OTLP_HEADERS="x-api-key:<PATRONUS_API_KEY>"
+```
+
+#### With `@vercel/otel`
+
+```ts filename="instrumentation.ts"
+import { registerOTel } from '@vercel/otel';
+import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-http';
+import { BatchSpanProcessor } from '@opentelemetry/sdk-trace-node';
+
+export function register() {
+  registerOTel({
+    serviceName: 'next-app',
+    additionalSpanProcessors: [
+      new BatchSpanProcessor(
+        new OTLPTraceExporter({
+          url: process.env.OTEL_EXPORTER_OTLP_ENDPOINT,
+          headers: {
+            'x-api-key': process.env.PATRONUS_API_KEY!,
+          },
+        }),
+      ),
+    ],
+  });
+}
+```
+
+<Note>
+  If you need gRPC instead of HTTP, swap the exporter for
+  `@opentelemetry/exporter-trace-otlp-grpc` and use
+  `https://otel.patronus.ai:4317`.
+</Note>
+
+### 2. Enable telemetry on individual calls
+
+The AI SDK emits a span only when you opt in with `experimental_telemetry`:
+
+```ts
+import { generateText } from 'ai';
+import { openai } from '@ai-sdk/openai';
+
+const result = await generateText({
+  model: openai('gpt-4o'),
+  prompt: 'Write a haiku about spring.',
+  experimental_telemetry: {
+    isEnabled: true,
+    functionId: 'spring-haiku', // span name
+    metadata: {
+      userId: 'user-123', // custom attrs surface in Patronus UI
+    },
+  },
+});
+```
+
+Every attribute inside `metadata` becomes an OTEL attribute and is indexed by Patronus for filtering.
+
+## Example — tracing and automated evaluation
+
+```ts filename="app/api/chat/route.ts"
+import { trace } from '@opentelemetry/api';
+import { generateText } from 'ai';
+import { openai } from '@ai-sdk/openai';
+
+export async function POST(req: Request) {
+  const body = await req.json();
+  const tracer = trace.getTracer('next-app');
+
+  return await tracer.startActiveSpan('chat-evaluate', async span => {
+    try {
+      /* 1️⃣ generate answer */
+      const answer = await generateText({
+        model: openai('gpt-4o'),
+        prompt: body.prompt,
+        experimental_telemetry: { isEnabled: true, functionId: 'chat' },
+      });
+
+      /* 2️⃣ run Patronus evaluation inside the same trace */
+      await fetch('https://api.patronus.ai/v1/evaluate', {
+        method: 'POST',
+        headers: {
+          'X-API-Key': process.env.PATRONUS_API_KEY!,
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          evaluators: [
+            { evaluator: 'lynx', criteria: 'patronus:hallucination' },
+          ],
+          evaluated_model_input: body.prompt,
+          evaluated_model_output: answer.text,
+          trace_id: span.spanContext().traceId,
+          span_id: span.spanContext().spanId,
+        }),
+      });
+
+      return new Response(answer.text);
+    } finally {
+      span.end();
+    }
+  });
+}
+```
+
+Result: a single trace containing the root HTTP request, the LLM generation span, and your evaluation span—**all visible in Patronus** with the hallucination score attached.
+
+## Once you've traced
+
+- If you're tracing an agent, Patronus's AI assistant Percival will assist with error analysis and prompt optimization. Learn more [here](https://docs.patronus.ai/docs/percival/percival)
+- Get set up on production monitoring and alerting by viewing logs and traces on Patronus and configuring webhooks for alerting. Learn more [here](https://docs.patronus.ai/docs/real_time_monitoring/webhooks)
+
+## Resources
+
+- [Patronus docs](https://docs.patronus.ai)
+- [OpenTelemetry SDK (JS)](https://opentelemetry.io/docs/instrumentation/js/)