T3 Code

What T3 Code is

T3 Code is the open-source control plane for coding agents. It orchestrates Claude Code, Codex, OpenCode, Cursor, and Grok from one surface, so you can see and run all your harnesses in one workspace instead of hopping between terminals.

Key features

• Orchestrate multiple harnesses - run Claude Code, Codex, OpenCode, Cursor, and Grok from one app. Bring your own subscription; T3 Code never resells tokens or caps your quota.
• One-button PR flow - every agent thread writes to its own branch; when it is good, one button commits, pushes, and opens a PR on GitHub with a generated title, body, and changelog.
• Switch models mid-thread - change the underlying harness or model while a conversation is in progress.
• Mobile companions - iOS and Android apps to drive or monitor agents from your phone.
• Fully open source - MIT licensed, 14k+ GitHub stars. Fork it, restyle the UI, add an agent, or self-host your own build.

Latest release (Aug 25, 2026)

A big one - over 380 changes. The highlights:

• In-app PR reviews - review pull requests without leaving the app.
• npx t3 triage - a CLI command that diagnoses and fixes problems with T3 Code itself.
• npx t3 connect on Mac - one command turns a Mac into a remote dev machine.
• Performance - 93.8%+ faster rendering of long threads, 80%+ less data transferred and stored per thread, an overhauled in-app terminal, and remote server upgrades that are 5x faster and far more reliable.
• Remote work - open remote projects in VS Code over SSH with one click.
• Themes - OpenVSX support, so favorite VS Code themes work directly in the app.
• Skills - more reliable Codex skill discovery, OpenCode skills now appear in the app, and Claude can discover project-level skills.
• Visibility - Claude Code compaction recommendations and Codex permission requests (MCP/ComputerUse) now surface in-app instead of hiding in the harness.
• Windows - a large batch of Windows app improvements.

Theo’s release announcement:

Install

Download for macOS from the GitHub releases page, or Windows/Linux from t3.codes/download. Companion apps on the App Store and Google Play. Want features as they land instead of waiting for a stable cut? Nightly builds ship them when they are (mostly) done.

Honest caveat

T3 Code is a control plane, not a model provider - it is only as good as the harnesses and subscriptions you plug into it.