What is Munder Difflin used for?

Munder Difflin is a free, open-source desktop harness that coordinates many coding-agent CLIs such as Claude Code, Codex and Gemini CLI as a team on your own machine. It is a good fit for coordinating several coding agents on one project, letting agents keep working while you are away, and mixing Claude Code and Codex in one workflow.

Is Munder Difflin open source?

Yes. Munder Difflin is open source under the MIT licence. Its source code is on GitHub at HarnessMD/munder-difflin and is written mainly in TypeScript.

Is Munder Difflin free?

Yes. Munder Difflin is open source, so the software itself is free to use.

What are some alternatives to Munder Difflin?

Similar open-source tools in the Developer Tools category include Agentacct, Atlas and Agent Beacon. SaaS products in the same category include 1DevTool, CNVS and AgenKit.

Is Munder Difflin actively maintained?

Yes. The most recent commit to Munder Difflin was on 2 October 2026, and the latest release is v0.5.5, published on 1 October 2026. The project has 8.3k stars on GitHub.

Munder Difflin: open-source developer tools

About Munder Difflin

Munder Difflin is an open-source multi-agent harness for running an office of coding agents on your own laptop. It wraps the terminal agents you may already use, including Claude Code, Codex, Gemini CLI, Antigravity, Grok, Kimi Code, Qwen, OpenCode, Crush, pi.dev, Cursor and GitHub Copilot CLI, and also accepts your own API keys and local models. It works with the subscriptions you already pay for, within their usage limits.

Every agent has long-term memory, a mailbox of its own, and a desk placed on a 2D office floor, and a lead agent playing your clone, named Michael, routes work between them while you watch avatars at work. The app is built with Electron, React, TypeScript, Pixi.js, xterm.js and node-pty, and runs on macOS, Windows and Linux. Version 0.5.3 adds local dictation into any app and local meeting transcription.

The project is MIT licensed and was created in May 2026. The README also advertises a Pro annual plan with a launch price of $150 USD, adjusted by country, so there is a paid tier alongside the free open-source build. It is aimed at developers who want to coordinate several coding agents at once.

Key features

Runs many coding agent CLIs together
Long-term memory and mailboxes for agents
2D office floor visualization
Bring your own keys or local models
Electron desktop app for three platforms
Local dictation and meeting transcription

Good fit for

→Coordinating several coding agents on one project
→Letting agents keep working while you are away
→Mixing Claude Code and Codex in one workflow

Built with: TypeScript; Electron
Tags: ai-agents; multi-agent; claude-code; codex; electron; orchestration; local-first; coding-agents; desktop

Munder Difflin: questions and answers

What is Munder Difflin used for?: Munder Difflin is a free, open-source desktop harness that coordinates many coding-agent CLIs such as Claude Code, Codex and Gemini CLI as a team on your own machine. It is a good fit for coordinating several coding agents on one project, letting agents keep working while you are away, and mixing Claude Code and Codex in one workflow.
Is Munder Difflin open source?: Yes. Munder Difflin is open source under the MIT licence. Its source code is on GitHub at HarnessMD/munder-difflin and is written mainly in TypeScript.
Is Munder Difflin free?: Yes. Munder Difflin is open source, so the software itself is free to use.
What are some alternatives to Munder Difflin?: Similar open-source tools in the Developer Tools category include Agentacct, Atlas and Agent Beacon. SaaS products in the same category include 1DevTool, CNVS and AgenKit.
Is Munder Difflin actively maintained?: Yes. The most recent commit to Munder Difflin was on 2 October 2026, and the latest release is v0.5.5, published on 1 October 2026. The project has 8.3k stars on GitHub.