Installation

Setup takes about 10 minutes. Brett Installer walks you through every step and checks each one before you move on.

Download and install Brett

1. Download Brett Installer from askbrett.app/download.
2. Open the downloaded file and double-click Brett Installer. If your Mac asks whether to open an app downloaded from the internet, click Open.
3. Click Install Brett. If your Mac asks for a password, type the one you use to log in to your Mac.
4. Choose the AI app you'll use: Claude (Claude Desktop) or ChatGPT (the ChatGPT app).
5. Follow the steps for Claude or ChatGPT below. Each step turns green when it's done.

Connect Brett to Claude

Claude takes six steps. The two extra steps add Brett's commands plugin.

1. Install Brett (done above).
2. Connect it to Claude. Click Connect to Claude, then Restart Claude when asked.
3. Activate your license. See Activate your license below. When asked, allow access to the folder called Claude.
4. Get the plugin. Click Save the Plugin. It saves Brett Skills.zip to your Downloads folder. Click Allow if your Mac asks.
5. Add the plugin to Claude.
   1. In Claude's left sidebar, click Customize, pick Plugins, click + Add, then Upload plugin.
   2. Choose Brett Skills.zip and click Upload.
   3. Claude shows Brett with 6 skills and its switch on. Tick the box in the installer to confirm.

   Plugin greyed out? Open Claude's Settings > Capabilities and switch on Code execution and file creation. On a Team plan, your Claude admin controls this.

6. Test it in Claude.
   1. Click Projects, then New project. Name it brett test.
   2. If the project has a Memory section, switch off Use account memory.
   3. In the project, type /ask-brett, pick it from the list, add hello and send.
   4. If Claude asks to use Brett, click Always allow. Claude replies that Brett is connected, and the installer shows All set.

Connect Brett to ChatGPT

ChatGPT takes four steps. Brett's commands are installed for you.

1. Install Brett (done above).
2. Connect it to ChatGPT. Click Connect to ChatGPT, then Restart ChatGPT when asked.
3. Activate your license. See Activate your license below. When asked, allow access to the folder called .codex.
4. Test it in ChatGPT.
   1. Start a new chat and type @.
   2. Pick Brett: Ask Brett, type hello and send. Not in the list? Quit ChatGPT with Command-Q, reopen it and try again.
   3. If ChatGPT asks whether it may use Brett, allow it. ChatGPT replies that Brett is connected, and the installer shows All set.

Activate your license

This is the same for Claude and ChatGPT.

1. In the installer, click Open Brett. Its window opens, and a Brett icon appears in the menu bar at the top of your screen.
2. Type the email you bought your license with and click Send Sign-In Link.
3. Open the email on this Mac and click its button within 15 minutes. Brett comes back signed in.
4. Read the Terms of Use to the end, tick the box and click Agree and Switch On Brett.
5. If asked, click Allow Access to Claude's Settings Folder... (or ChatGPT's), check the folder name, then click Allow Access. Brett reads only your account ID there, to tie the license to your account, never your sign-in.

Reinstalling or repairing Brett

Run Brett Installer again at any time. It re-checks every step and fixes anything that's wrong, without changing your license. To move Brett to a different Mac, see Computers.