> ## Documentation Index
> Fetch the complete documentation index at: https://docs.commonality.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Constraint object

Constraints are used to limit which packages can depend on one another.

***

## Properties

### `disallow`

```ts theme={null}
"*" | string[]
```

The `disallow` property accepts a `*` [selector](/selectors) to match all packages or an array of [tags](/tags) to match groups of packages.

### `allow`

```ts theme={null}
"*" | string[]
```

The `allow` property accepts a `*` [selector](/selectors) to match all packages or an array of [tags](/tags) to match groups of packages.