> ## 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.

# Package configuration

A project configuration file is a `commonality.json` file located at the root of a package directory.

***

## Properties

### `tags`

The tags associated with the package. Packages can be selected with tags using [selectors](/selectors) in your [project configuration](/reference/project-configuration).

<Tip>When editing tags in [Commonality Studio](/studio/editing-tags), we'll automatically update this property for you.</Tip>

```json commonality.json theme={null}
{
  "tags": ["ui", "buildable", "checkout"]
}
```