Overview

T3 Code is a minimal, open-source desktop app that provides a purpose-built UI for agentic AI coding workflows. Built by Theo Browne and developer Julius, it acts as a frontend layer on top of AI coding engines like Codex CLI, with Claude Code support planned. T3 Code supports multi-repo, multi-agent parallelism to run multiple AI agents across different projects simultaneously, Git worktree integration for isolated task environments, and a task-oriented chat UI where each thread represents a discrete task with full reasoning and tool call visibility. You can commit and push directly from the UI, and the tool is designed to solve the biggest pain points with how CLI-based AI coding tools are used today.

Architecture: Apple Silicon, Intel

Key Features

Multi-repo, multi-agent parallelism to run AI agents across different projects simultaneously
Git worktree integration for spinning up isolated environments per task
Task-oriented chat UI with full reasoning and tool call visibility
Built-in git actions to commit and push directly from the interface
Bring your own AI harness by plugging into existing agentic backends
Available as desktop app or via npx t3 command
Cross-platform support for macOS, Windows, and Linux