70 lines
2.3 KiB
TypeScript
70 lines
2.3 KiB
TypeScript
import type { ToolInterface } from "@langchain/core/tools";
|
|
import { BasePromptTemplate } from "@langchain/core/prompts";
|
|
import type { BaseLanguageModelInterface } from "@langchain/core/language_models/base";
|
|
import { AgentStep } from "@langchain/core/agents";
|
|
import { AgentRunnableSequence } from "../agent.js";
|
|
/**
|
|
* Params used by the createXmlAgent function.
|
|
*/
|
|
export type CreateReactAgentParams = {
|
|
/** LLM to use for the agent. */
|
|
llm: BaseLanguageModelInterface;
|
|
/** Tools this agent has access to. */
|
|
tools: ToolInterface[];
|
|
/**
|
|
* The prompt to use. Must have input keys for
|
|
* `tools`, `tool_names`, and `agent_scratchpad`.
|
|
*/
|
|
prompt: BasePromptTemplate;
|
|
/**
|
|
* Whether to invoke the underlying model in streaming mode,
|
|
* allowing streaming of intermediate steps. Defaults to true.
|
|
*/
|
|
streamRunnable?: boolean;
|
|
};
|
|
/**
|
|
* Create an agent that uses ReAct prompting.
|
|
* @param params Params required to create the agent. Includes an LLM, tools, and prompt.
|
|
* @returns 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.
|
|
*
|
|
* @example
|
|
* ```typescript
|
|
* 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?",
|
|
* });
|
|
* ```
|
|
*/
|
|
export declare function createReactAgent({ llm, tools, prompt, streamRunnable, }: CreateReactAgentParams): Promise<AgentRunnableSequence<{
|
|
steps: AgentStep[];
|
|
}, import("@langchain/core/agents").AgentAction | import("@langchain/core/agents").AgentFinish>>;
|