# entity

`import { entity } from "destack:topology";`

Mark a declaration as a topology entity.

```ds title="entity"
export newtype entity<T = unknown> = EntityOptions<T>
```

[language/library/src/topology/decorator.ds:34](https://github.com/destack-sh/destack/blob/main/language/library/src/topology/decorator.ds#L34)