---
url: 'https://adk.nht.io/api/@nhtio/adk/batteries/type-aliases/StreamMap.md'
description: >-
  The shape of a `streams` map passed to [`defineIsolatedService`](https://adk.nht.io/api/@nhtio/adk/batteries/functions/defineIsolatedService):
  fire-and-forward streaming descriptors keyed by stream name.
---

# Type Alias: StreamMap

```ts
type StreamMap = Record<string, StreamDescriptor<unknown[], unknown>>;
```

Defined in: [src/batteries/isolation/types.ts:148](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/isolation/types.ts#L148)

The shape of a `streams` map passed to [defineIsolatedService](../functions/defineIsolatedService.md): fire-and-forward streaming
descriptors keyed by stream name.