部署

npm install @langchain/langgraph-sdk

import { Client } from "@langchain/langgraph-sdk";

const client = new Client({ apiUrl: "your-deployment-url", apiKey: "your-langsmith-api-key" });

const streamResponse = client.runs.stream(
  null,    // 无线程运行
  "agent", // 智能体名称，在 langgraph.json 中定义。
  {
    input: {
      "messages": [
        { "role": "user", "content": "什么是 LangGraph？"}
      ]
    },
    streamMode: "messages",
  }
);

for await (const chunk of streamResponse) {
  console.log(`正在接收新事件，类型：${chunk.event}...`);
  console.log(JSON.stringify(chunk.data));
  console.log("\n\n");
}