T3 Code on a Mac
Open-source control surface for the coding agents on your Mac · Agent Platforms
T3 Code (t3.codes, pingdotgg/t3code, MIT) is an agent harness control surface: one place to drive the coding agents already installed on your machine — Claude Code, Codex, Cursor, Grok Build and OpenCode — from an Electron desktop app, a local web app, or its iOS/Android apps, so you can check on a long-running agent from your phone. It runs on your existing subscriptions: each agent is installed and authenticated separately (claude auth login, codex login, agent login, grok login, opencode auth login), and T3 Code drives those CLIs rather than reselling model access. Install with brew install --cask t3-code, or try it without installing via npx t3@latest, which starts the backend plus the local web UI. Note it is not an OpenAI-compatible endpoint — it orchestrates agent processes, so it does not appear in the Harness's model menus the way VibeProxy or a local LLM server does; it belongs beside your other agent runtimes. Still alpha upstream (the app bundle is named "T3 Code (Alpha)").
Run T3 Code with FrontierStack
FrontierStack lists T3 Code in its Agent Platforms catalog. Install or connect it from one place, then monitor its status, ports and certificate, secure it with the firewall and Malware Audit, and back it up.
Run it all from one Mac app.
FrontierStack installs, monitors and secures the whole stack — locally and across your fleet — from a single native macOS app.
Download FrontierStack