LangSmithTelemetry

Creates a LangSmith Telemetry for the Vercel AI SDK.

This adapter implements the Vercel AI SDK's Telemetry interface and maps lifecycle events to LangSmith traces. It creates a root span for the entire generation, child LLM spans for each step, and tool spans for tool calls.

import { generateText, registerTelemetry } from "ai";
import { LangSmithTelemetry } from "langsmith/experimental/vercel";

registerTelemetry(LangSmithTelemetry());

const result = await generateText({
  model: openai("gpt-4o"),
  prompt: "Hello!",
});

Only available in Vercel AI SDK 7.