Function createToolCallingAgent

Create an agent that uses tools.

Example

import { ChatAnthropic } from "@langchain/anthropic";
import { ChatPromptTemplate, MessagesPlaceholder } from "@langchain/core/prompts";
import { AgentExecutor, createToolCallingAgent } from "langchain/agents";

const prompt = ChatPromptTemplate.fromMessages(
  [
    ["system", "You are a helpful assistant"],
    ["placeholder", "{chat_history}"],
    ["human", "{input}"],
    ["placeholder", "{agent_scratchpad}"],
  ]
);


const llm = new ChatAnthropic({
  modelName: "claude-3-opus-20240229",
  temperature: 0,
});

// Define the tools the agent will have access to.
const tools = [...];

const agent = createToolCallingAgent({ llm, tools, prompt });

const agentExecutor = new AgentExecutor({ agent, tools });

const result = await agentExecutor.invoke({input: "what is LangChain?"});

// Using with chat history
import { AIMessage, HumanMessage } from "@langchain/core/messages";

const result2 = await agentExecutor.invoke(
  {
    input: "what's my name?",
    chat_history: [
      new HumanMessage({content: "hi! my name is bob"}),
      new AIMessage({content: "Hello Bob! How can I assist you today?"}),
    ],
  }
);
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