部署

npm install @langchain/langgraph-sdk

const { Client } = await import("@langchain/langgraph-sdk");

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

const streamResponse = client.runs.stream(
    null,    // 无会话运行
    "agent", // 代理名称。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(`接收到类型为: ${chunk.event} 的新事件...`);
    console.log(JSON.stringify(chunk.data));
    console.log("\n\n");
}