A crew of coding agents,
running on your Mac.

byre runs Claude Code, Codex and Antigravity side by side, each on its own branch and worktree, with a lead agent that watches them all and tells you what needs you.

Download for macOS Free and open source. Updates itself.

What it does

• Tasks

  Every task gets its own git worktree, branch and port block. Talk to its agent in a live transcript, even mid-turn.

• Lead agent

  One long-running agent watches every task, points you at what needs you, and starts, messages, merges or discards tasks when you ask.

• Questions, not interruptions

  Agents ask structured questions with a recommended answer. You answer with a click, from an inbox or a notification.

• Cross-vendor reviews

  Every turn that changes files is reviewed by the other vendor's model. You fix or ignore each finding.

• One-click merge

  The agent merges main in and resolves conflicts, then byre squashes, pushes and closes the task.

• Snapshots and forks

  Step through a task's snapshots, diff any of them, and fork a new task from any one, conversation included.

• Subtasks, teams, workflows

  Agents spawn subtasks or share a worktree as a team. Workflows chain stages with fan-out and fan-in.

• Hands on your Macs

  Agents can see and drive the Mac byre runs on, and the Macs you have the app open on, when a task needs it.

Getting started

1. Install Tailscale on every Mac you'll use. byre serves only your tailnet, and takes your identity from it.
2. On the Mac that will run the agents, install git, Node.js, Google Chrome and at least one of the claude, codex and agy CLIs.
3. Download byre, drag it to Applications, open it and click Run byre on this Mac. It checks what's missing and tells you how to install it.
4. Open byre on your other Macs. They find the server through iCloud.