LangGraph Integration

import { ChatOpenAI } from "@langchain/openai";import { createReactAgent } from "@langchain/langgraph/prebuilt";import { MemorySaver } from "@langchain/langgraph";const model = new ChatOpenAI({    model: 'gpt-4.1-mini',    apiKey: process.env.HELICONE_API_KEY,    configuration: {        baseURL: "https://ai-gateway.helicone.ai/v1",    },});const agent = createReactAgent({    llm: model,    tools: yourTools,    checkpointer: new MemorySaver(),});

import { ChatOpenAI } from "@langchain/openai";import { createReactAgent } from "@langchain/langgraph/prebuilt";const model = new ChatOpenAI({    model: 'gpt-4o-mini',    apiKey: process.env.OPENAI_API_KEY,});const agent = createReactAgent({    llm: model,    tools: myTools,});

import { ChatOpenAI } from "@langchain/openai";import { createReactAgent } from "@langchain/langgraph/prebuilt";const model = new ChatOpenAI({    model: 'gpt-4.1-mini',                      // 100+ models supported    apiKey: process.env.HELICONE_API_KEY,      // Your Helicone API key    configuration: {        baseURL: "https://ai-gateway.helicone.ai/v1"  // Add this!    },});const agent = createReactAgent({    llm: model,    tools: myTools,});

import { HumanMessage } from "@langchain/core/messages";import { v4 as uuidv4 } from 'uuid';const result = await agent.invoke(    { messages: [new HumanMessage("What is the weather in San Francisco?")] },    {        options: {            headers: {                "Helicone-Session-Id": uuidv4(),                "Helicone-Session-Path": "/weather/query",                "Helicone-Property-Query-Type": "weather",            },        },    });