Bellbird Code is Bellbird's maintained, self-hosted agent harness control surface, based on the open-source T3 Code project. It enables control of the agents on your machine from web, mobile and desktop clients.
It works with your subscriptions on Claude Code, Codex, Cursor, Grok Build, and OpenCode. If they are set up on your computer, Bellbird Code can control them.
The Bellbird deployment is built from a reviewed commit of this fork. Internal compatibility names such as the t3 CLI, T3CODE_* environment variables and the t3code:// protocol remain unchanged so upstream updates and existing data stay compatible. See BELLBIRD.md for governance and deployment rules.
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.
Warning
T3 Code currently supports Codex, Claude, Cursor, Grok Build and OpenCode. Install and authenticate at least one provider before use:
- Codex: install Codex CLI and run
codex login - Claude: install Claude Code and run
claude auth login - Cursor: install Cursor CLI and run
agent login - Grok Build: install Grok Build CLI and run
grok login - OpenCode: install OpenCode and run
opencode auth login
The easiest way to test T3 Code is to run the server in your terminal (requires Node.js 22.16+, 23.11+, or 24.10+):
npx t3@latestThis command installs the upstream npm release, not Bellbird Code. Bellbird deployments are built from this repository at an exact commit.
Tip: Use npx t3@latest --help for the full CLI reference.
Install the latest version of the desktop app from GitHub Releases, or from your favorite package registry:
winget install T3Tools.T3Codebrew install --cask t3-codeStable:
yay -S t3code-binNightly:
yay -S t3code-nightly-binThe AUR packaging is maintained in this repository under packaging/aur.
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.
Full docs live in docs/. There's no docs site yet.
- Install and first run
- Permission modes
- Keyboard shortcuts
- Customize a project icon
- Remote access from a phone or another machine
- Keeping app and server in sync
- Source control integrations
- Multiple accounts: Codex · Claude
- Linux: run T3 Code as a background service
Building from source? Start at docs/internals/overview.md.
T3 Code uses Vite+ so you'll need to install the global vp command-line tool.
curl -fsSL https://vite.plus | bashirm https://vite.plus/ps1 | iexCheckout their getting started guide for more information: https://viteplus.dev/guide/
vp iRead CONTRIBUTING.md before reporting a bug or opening a PR.
Have a feature request? Start an Ideas discussion.
Need support? Join the Discord.