# Runtime

> **Type Alias** in `langchain`

📖 [View in docs](https://reference.langchain.com/javascript/langchain/index/Runtime)

Runtime information available to middleware (readonly).

## Signature

```javascript
Runtime: Partial<Omit<LangGraphRuntime<TContext>, "context" | "configurable">> & WithMaybeContext<TContext> & __type
```

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[View source on GitHub](https://github.com/langchain-ai/langchainjs/blob/e233f4192475cfb97dbd8907b2fb69b812b6950a/libs/langchain/src/agents/runtime.ts#L63)