T3 Code

T3 Code is an "agent harness control surface". It enables control of the agents on your machine with a best-in-class mobile app (iOS (opens in a new tab), Android (opens in a new tab)), web app (opens in a new tab) and Electron-based desktop app (opens in a new tab).

Works with your subscriptions on Claude Code, Codex, Cursor, Grok Build, OpenCode, and Google Antigravity. If they're set up on your computer, T3 Code can control them.

"Wait, what are you selling me?"

Nothing. We built T3 Code because we wanted the best possible development experience with agents. We were inspired by existing solutions like the Codex desktop app, Conductor, Claude Desktop and Cursor Glass, but none met our bar.

We wanted something performant, remote-ready, and truly open. If we ever go the wrong direction, we want you to have everything you need to fork and build the editor that you want.

Command line

On Windows, in PowerShell:

Then run t3 to start the server and open the local web app. t3 service install keeps it running in the background, t3 update moves to a newer release, and t3 --help has the full reference.

To try it once without installing, run npx t3@latest instead.

Desktop app

Install the latest version of the desktop app from GitHub Releases (opens in a new tab), or from your favorite package registry:

Debian, Ubuntu (.deb)

Download the .deb from GitHub Releases (opens in a new tab), then:

Arch Linux (AUR)

Stable:

Nightly:

The AUR packaging is maintained in this repository under [packaging/aur](./packaging/aur).

Some notes

We are very very early in this project. Expect bugs.

We are (mostly) not accepting contributions yet. Small fixes may be considered. Big features will not be.

Documentation

Full docs live in [docs/](./docs). There's no docs site yet.

• [Install and first run](./docs/user/install.md)
• [Permission modes](./docs/user/permission-modes.md)
• [Keyboard shortcuts](./docs/user/keybindings.md)
• [Project settings](./docs/user/project-settings.md)
• [Appearance preferences](./docs/user/appearance.md)
• [Remote access from a phone or another machine](./docs/user/remote-access.md)
• [Connect Claude Code, Codex, ChatGPT and other agents over MCP](./docs/user/outside-agents.md)
• [Keeping app and server in sync](./docs/user/updating.md)
• [Source control integrations](./docs/user/source-control.md)
• Multiple accounts: [Codex](./docs/user/providers-codex.md) · [Claude](./docs/user/providers-claude.md)