---
url: /reference/oby.md
---

# @signaldb/oby

## obyReactivityAdapter (`default`)

```js
import { Collection } from '@signaldb/core'
import obyReactivityAdapter from '@signaldb/oby'
import { effect } from 'oby'

const posts = new Collection({
  reactivity: obyReactivityAdapter,
})

effect(() => {
  console.log(posts.find({ author: 'John' }).count())
})
```

Reactivity adapter for usage with [oby](https://github.com/vobyjs/oby).