---
url: /api/specs/openspec/types/openspec3/type-os-3-callbacks.md
description: api documentation of OS3Callbacks from @tsed/openspec
---

## Usage

```typescript
import { OS3Callbacks } from "@tsed/specs/openspec/src/openspec3/OS3Callbacks";
```

> See [/packages/specs/openspec/src/openspec3/OS3Callbacks.ts](https://github.com/tsedio/tsed/blob/v8.37.1/packages/specs/openspec/src/openspec3/OS3Callbacks.ts#L0-L0).

## Overview

```ts
type OS3Callbacks<Schema = OS3Schema> = OpenSpecHash<OpenSpecHash<OS3Paths<Schema>>>;
```