Add Vercel AI telemetry example

.gitignore

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 .DS_Store
-package.json
-package-lock.json
 node_modules/
 .idea
 .vscode

.mintignore

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+examples/

examples/vercel-ai-telemetry/.env.example

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+OPENAI_API_KEY=
+OPENAI_MODEL=gpt-5
+PROMPTLAYER_API_KEY=
+OTEL_SERVICE_NAME=vercel-chat-app

examples/vercel-ai-telemetry/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+!.env.example
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

examples/vercel-ai-telemetry/README.md

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+# Relay Chat Demo
+
+A simple Next.js App Router scaffold for a chat app built with the Vercel AI SDK and the direct OpenAI provider.
+
+## What is included
+
+- A streaming chat interface powered by `useChat`
+- A `ToolLoopAgent` with three mocked server-side tools
+- Typed UI messages via `InferAgentUIMessage`
+- An API route that streams agent responses with `createAgentUIStreamResponse`
+
+## Setup
+
+1. Install dependencies:
+
+```bash
+npm install
+```
+
+2. Create a local env file from the example:
+
+```bash
+cp .env.example .env.local
+```
+
+3. Add your OpenAI API key to `.env.local`:
+
+```bash
+OPENAI_API_KEY=your_key_here
+```
+
+4. Optional: add PromptLayer tracing credentials if you want OpenTelemetry traces exported to PromptLayer:
+
+```bash
+PROMPTLAYER_API_KEY=your_promptlayer_key_here
+OTEL_SERVICE_NAME=vercel-chat-app
+```
+
+5. Start the app:
+
+```bash
+npm run dev
+```
+
+Open [http://localhost:3000](http://localhost:3000).
+
+## Model configuration
+
+The scaffold uses the direct OpenAI provider from `@ai-sdk/openai` and defaults to `gpt-5`, matching the current example on the AI SDK OpenAI provider docs. You can override that with:
+
+```bash
+OPENAI_MODEL=your_preferred_model
+```
+
+## PromptLayer tracing
+
+This app can export Vercel AI SDK traces to PromptLayer using OpenTelemetry.
+
+- `PROMPTLAYER_API_KEY` enables OTLP trace export to PromptLayer
+- `OTEL_SERVICE_NAME` optionally overrides the service name shown in traces
+
+If `PROMPTLAYER_API_KEY` is not set, the app still runs normally and skips PromptLayer export.
+
+## Useful scripts
+
+- `npm run dev`
+- `npm run lint`
+- `npm run typecheck`

examples/vercel-ai-telemetry/app/api/chat/route.ts

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+import { createAgentUIStreamResponse } from "ai";
+import { chatAgent } from "@/lib/chat-agent";
+
+export const maxDuration = 30;
+
+export async function POST(request: Request) {
+  if (!process.env.OPENAI_API_KEY) {
+    return new Response(
+      "Missing OPENAI_API_KEY. Add it to .env.local before using the chat route.",
+      { status: 500 },
+    );
+  }
+
+  const { messages } = await request.json();
+
+  return createAgentUIStreamResponse({
+    agent: chatAgent,
+    uiMessages: messages,
+  });
+}

examples/vercel-ai-telemetry/app/globals.css

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+:root {
+  --page-background:
+    radial-gradient(circle at top left, rgba(246, 176, 135, 0.2), transparent 28%),
+    radial-gradient(circle at bottom right, rgba(45, 156, 139, 0.18), transparent 26%),
+    #f7f2ea;
+  --foreground: #15211d;
+  --muted-foreground: #5e6966;
+  --panel: rgba(255, 252, 246, 0.84);
+  --panel-strong: #fffdf8;
+  --line: rgba(21, 33, 29, 0.08);
+  --accent: #0f766e;
+  --accent-strong: #0b5c56;
+  --accent-soft: rgba(15, 118, 110, 0.12);
+  --user-bubble: #15211d;
+  --assistant-bubble: #fff8ef;
+  --tool-bubble: #f1faf7;
+  --danger: #a93e2f;
+  --font-sans: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
+  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
+}
+
+html {
+  height: 100%;
+}
+
+html,
+body {
+  max-width: 100vw;
+  overflow-x: hidden;
+}
+
+body {
+  min-height: 100%;
+  display: flex;
+  flex-direction: column;
+  color: var(--foreground);
+  background: var(--page-background);
+  font-family: var(--font-sans);
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+* {
+  box-sizing: border-box;
+  padding: 0;
+  margin: 0;
+}
+
+a {
+  color: inherit;
+  text-decoration: none;
+}
+
+button,
+input,
+textarea {
+  font: inherit;
+}
+
+::selection {
+  background: rgba(15, 118, 110, 0.18);
+}

examples/vercel-ai-telemetry/app/layout.tsx

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+import type { Metadata } from "next";
+import "./globals.css";
+
+export const metadata: Metadata = {
+  title: "Relay Chat Demo",
+  description: "A simple AI SDK chat app with an OpenAI-backed agent and mock tools.",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body>{children}</body>
+    </html>
+  );
+}