T3 Code

T3 Code calls itself an agent harness control surface. The problem it removes is being tied to the terminal where an agent runs, because the server runs on your machine and the clients talk to it, so a session started at your desk can be steered from a phone on the train.

It drives agents you have already installed and authenticated rather than shipping its own. Claude Code, Codex, Cursor, Grok Build, OpenCode and Google Antigravity are supported, and at least one of them must be set up first. Running the published npx command starts the backend plus a local web app with nothing to install.

The surfaces and controls it exposes are the following.

• Mobile apps: iOS and Android clients drive agents running on a machine somewhere else.
• Desktop app: an Electron build distributed through GitHub Releases, winget, Homebrew and the AUR.
• Remote access: documented setup for reaching your agents from a phone or another computer.
• Permission modes: configurable limits on what an agent may do before it has to ask.
• Source control integrations: documented hooks into the repositories the agents are working in.

The maintainers are blunt about the state of things. The project is very early, bugs are expected, and large contributions are mostly not being accepted yet. It exists because the team wanted a remote-ready agent workflow that stayed forkable, so anyone unhappy with its direction has everything needed to build their own. Node.js 22.16 or newer is required.