Params required to create the agent. Includes an LLM, tools, and prompt.
A runnable sequence representing an agent. It takes as input all the same input variables as the prompt passed in does. It returns as output either an AgentAction or AgentFinish.
import { AgentExecutor, createReactAgent } from "langchain/agents";
import { pull } from "langchain/hub";
import type { PromptTemplate } from "@langchain/core/prompts";
import { OpenAI } from "@langchain/openai";
// Define the tools the agent will have access to.
const tools = [...];
// Get the prompt to use - you can modify this!
// If you want to see the prompt in full, you can at:
// https://smith.langchain.com/hub/hwchase17/react
const prompt = await pull<PromptTemplate>("hwchase17/react");
const llm = new OpenAI({
temperature: 0,
});
const agent = await createReactAgent({
llm,
tools,
prompt,
});
const agentExecutor = new AgentExecutor({
agent,
tools,
});
const result = await agentExecutor.invoke({
input: "what is LangChain?",
});
Create an agent that uses ReAct prompting.