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

# Files

> Browse and edit your project's code, and point the agent to specific files.

## The Files Tab

Want to look under the hood? The **Files** tab, next to **Preview**, shows all of your project's code. You can browse folders, search for a file, and open it to see what's inside.

<Note>
  The Files tab requires a Core plan or above.
</Note>

### Editing Files

You can also edit files yourself:

1. Open the file you want to change.
2. Make your changes.
3. Click **Save**, or press **⌘ S** (**Ctrl S** on Windows).

Your changes are saved to your project, just like the agent's. While the agent is working, you'll see **AI is editing this file** on files it's changing, and you can't save until it finishes.

Some files, like `.env` files, can't be edited here. To change your API keys, use [Environment Variables](/features/environment-variables) instead.

### On Your Phone

Using CatDoes on your phone? Open the **Files** tab at the top of your project. Tap a file to open it, then tap **Edit** to make changes and **Save** when you're done.

## Referencing Files in the Chat

Type **@** in the chat box to point the agent to a specific file or folder. Start typing its name, pick it from the list, and it's added to your message. This helps the agent find exactly what you're talking about.

The agent uses the same references in its replies. Click one to open that file in the Files tab.

<Tip>
  You don't need to know where things live in your code to use CatDoes — describing what you see on the screen works great. But if you do know the file, referencing it with **@** saves the agent a few steps.
</Tip>