Duo

Duo

Claude Code and Codex in one desktop app. Chat with either, run them side by side, or let them work on the same problem together: one writes the code while the other reviews it, they debate until every claim is agreed, or they cross-check each other's code reviews. Every prompt, tool call, token and credit is recorded.

Duo drives the official CLIs you already use, signed in with your own plans: Claude Code (Claude subscription) and the Codex CLI (ChatGPT subscription). Nothing goes through a third-party server.

Runs on Linux, macOS and Windows.

Modes

The app shows an animated walkthrough of each mode on its home screen and next to the run form.

Install

You need:

- Node.js 22.18 or newer (Duo runs its TypeScript sources directly).
- git (pair mode and the Changes panel use it).
- Claude Code, installed and signed in: run claude once and use /login.
- A ChatGPT account for Codex: Duo bundles a pinned Codex CLI; sign in with npx codex login from the Duo folder, or through the ChatGPT desktop app.

For a versioned release, download the source bundle and SHA256SUMS from GitHub Releases, verify the checksum, extract it, and run npm ci followed by node bin/duo.js setup in the extracted folder. Bundles include the built GUI and require the same Node.js, Git and CLI sign-ins as a checkout. See the 0.3.0 release notes.

duo setup adds an app launcher (the application menu on Linux, ~/Applications/Duo.app on macOS, the Start menu on Windows), the duo and duo-safe commands, a /duo skill for Claude Code, a $duo skill for Codex, and a Codex rule that pre-approves duo-safe. duo setup --uninstall removes all of it.

Then open Duo from your launcher, or run duo gui.

Notes:

- npm install builds or downloads one native module (re2, used by claw-orchestrator). If your npm…