> ## Documentation Index
> Fetch the complete documentation index at: https://nvd-54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# MISSING_CHECKPOINTER

你正在尝试使用 LangGraph 的内置持久化功能，但未提供检查点。

当 [`StateGraph`](https://reference.langchain.com/javascript/langchain-langgraph/index/StateGraph) 或 [`entrypoint`](https://reference.langchain.com/javascript/langchain-langgraph/index/entrypoint) 的 `compile()` 方法中缺少 `checkpointer` 时会发生此情况。

## 故障排除

以下可能有助于解决此错误：

* 初始化并将检查点传递给 [`StateGraph`](https://reference.langchain.com/javascript/langchain-langgraph/index/StateGraph) 或 [`entrypoint`](https://reference.langchain.com/javascript/langchain-langgraph/index/entrypoint) 的 `compile()` 方法。

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { InMemorySaver, StateGraph } from "@langchain/langgraph";
const checkpointer = new InMemorySaver();

// 图 API
import { StateGraph } from "@langchain/langgraph";
const graph = new StateGraph(...).compile({ checkpointer });

// 函数式 API
import { entrypoint } from "@langchain/langgraph";
const workflow = entrypoint(
    { checkpointer, name: "workflow" },
    async (messages: string[]) => {
        // ...
    }
);
```

* 使用 LangGraph API，这样你就不需要手动实现或配置检查点。API 为你处理所有持久化基础设施。

## 相关

* 阅读更多关于[持久化](/oss/javascript/langgraph/persistence)的内容。

***

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