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The @braintrust/langchain-js package provides seamless integration between Braintrust and LangChain.js.

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Installation

npm install @braintrust/langchain-js

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Quick start

import { BraintrustCallbackHandler } from "@braintrust/langchain-js";
import { ChatOpenAI } from "@langchain/openai";

// Create a callback handler
const handler = new BraintrustCallbackHandler();

// Use with any LangChain model
const llm = new ChatOpenAI({ callbacks: [handler] });

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API Reference

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Functions

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setGlobalHandler

setGlobalHandler function.

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Classes

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BraintrustCallbackHandler

BraintrustCallbackHandler class.

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Source Code

For the complete source code and additional examples, visit the Braintrust JavaScript SDK repository.