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@cloudbase/agent-adapter-langchain

v0.0.24

Published

LangChain adapter for AG-Kit agents

Readme

@cloudbase/agent-adapter-langchain

将 LangChain Agent 转换为符合 AG-UI 协议 的 Agent。

功能

  • LangchainAgent:将 LangChain 的 createAgent() 创建的 Agent 包装为 AG-UI 兼容的 Agent
  • clientTools():中间件,让客户端可以动态注入工具到 Agent 调用中

安装

npm install @cloudbase/agent-adapter-langchain

快速开始

import { run } from "@cloudbase/agent-server";
import { createAgent as createLangchainAgent } from "langchain";
import { MemorySaver } from "@langchain/langgraph";
import { ChatOpenAI } from "@langchain/openai";
import { LangchainAgent, clientTools } from "@cloudbase/agent-adapter-langchain";

const checkpointer = new MemorySaver();

const model = new ChatOpenAI({
  model: process.env.OPENAI_MODEL!,
  apiKey: process.env.OPENAI_API_KEY!,
  configuration: {
    baseURL: process.env.OPENAI_BASE_URL,
  },
});

// 创建 LangChain Agent,使用 clientTools 中间件支持客户端工具
const lcAgent = createLangchainAgent({
  model,
  checkpointer,
  middleware: [clientTools()],
});

// 部署为 HTTP 服务
run({
  createAgent: () => ({
    agent: new LangchainAgent({ agent: lcAgent }),
  }),
  port: 9000,
});

API 参考

LangchainAgent

将 LangChain Agent 包装为 AG-UI 兼容的 Agent。

type LangchainAgentConfig = AgentConfig & {
  agent: ReturnType<typeof createAgent>; // LangChain 的 createAgent() 返回值
  logger?: Logger;                        // 可选,日志实例
};

const agent = new LangchainAgent(config);

clientTools()

创建一个中间件,让客户端可以动态注入工具到 Agent 调用中。

const agent = createAgent({
  model,
  checkpointer,
  middleware: [clientTools()],
});

客户端定义的工具会与服务端工具合并使用。

依赖

  • langchain:LangChain Agent 框架
  • @langchain/langgraph:Agent 会话记忆(MemorySaver)
  • @langchain/openai:OpenAI 兼容模型接入

文档

📚 完整文档请参阅 云开发 Agent 开发指南

相关资源