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You need an Apple silicon Mac running macOS 13.5 or newer. For an embedded teammate, you also need a compatible Codex installation and ChatGPT account with Codex access. Your existing eligible subscription works through Sign in with ChatGPT; the embedded integration does not use API-key billing. You can add multiple accounts. MTS does not bundle the Codex runtime. The packaged app does not require a separate Node installation. To use a different coding agent without the embedded Codex integration, follow Connect an external agent.
1

Install MTS and create a project

Download Gatetrix MTS, install it in Applications, and open it. Create a project from the welcome screen or project menu. A new project starts with Features, Bugs, and Improvements collections.
2

Add a teammate

Under Team, choose Add team member…. Give the member a name, instructions, and the project’s working folder. Choose its allowed actions in MTS and review its execution access for coding work.
3

Connect the runtime and account

Enable Agent access, open the teammate’s chat, and choose Sign in with ChatGPT. MTS detects common Codex installation locations. If needed, open Codex setup… in the member’s menu to review its runtime installation and connection settings.
4

Create one small task

Add an entry to a collection with a concrete outcome. Move it into the Roadmap and mark it as a task. For a first trial, use a bounded task such as reviewing your project’s setup instructions and identifying one missing prerequisite.
5

Ask your teammate to work on it

Attach the selected entry to the conversation and ask the teammate to follow the task’s workflow. It should read the scope, claim the task, and record meaningful progress in Work.
6

Review the result

Open Work to inspect the current step, summary, outputs, and questions. Reply to ordinary questions in chat or Work. A step with an explicit approval requirement must be decided with Approve or Request changes.

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What success looks like

The teammate produces the requested result, records it in Work, and follows the configured steps. The conversation explains the work; the task record keeps the current outcome and next action easy to find.

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Use voice when helpful

The microphone beside Send supports experimental dictation. Stop inserts the transcript into your editable draft; the send control finishes transcription and sends the message. Allow microphone access when macOS asks. Audio is streamed to OpenAI. Voice availability depends on the signed-in account and its limits. You can always type your request instead. If the teammate cannot connect, check agent access, the selected runtime, account sign-in, and the availability of its working folder. See Troubleshooting.