coder/mux: A desktop app for isolated, parallel agentic development

by

mux product screenshot

A desktop application for parallel agentive development.

Why parallelization?

Here are some specific use cases we enable:

  • Contextual continuity between contextual changes,
    • Create a workspace for example code-review, refactorAnd new-feature
  • gpt-5-pro: Use the slow but powerful GPT-5-Pro ​​for complex problems
    • run in background for hours
    • The stream will automatically resume after a restart or intermittent connection problems. We will show an indicator if the model completes early.
  • A/B testing: Run multiple workspaces in parallel on the same problem but with different approaches, discarding bad workspaces.
  • tangent exploration:launch tangents mux away from main work
  • isolated workspace With a central view on git divergence
    • local:git worktrees (documents) on your local machine
    • ssh:regular git clone (document) to remote server
  • multi model ,sonnet-4-*, grok-*, gpt-5-*, opus-4-*,
    • Olama supported for local LLM (document)
    • OpenRouter is supported for long ranges of LLM (documents)
  • vs code extension: Go directly to Mux workspace from VS Code (document)
  • Supporting UI and keybinds to efficiently manage a group of agents
  • Rich Markdown output (Mermaid Diagram, LaTeX, etc.)

mux has a custom agent loop but much of the core UX is inspired by cloud code. You’ll find familiar features like Plan/Exec mode, Vim input. /compact and new ones like opportunistic compaction and mode indication.

Read entire document →

alert

The mux is in preview state. You will encounter bugs and performance issues. It’s still possible to be highly productive. We are using it almost exclusively for our development.

Download pre-built binaries from the release page for macOS and Linux.

More information on installation →

Integrated code-review for faster iteration:


screenshot of code review

Agents report their status via the sidebar:

Screenshot of agent status

The Git Divergence UI keeps you aware of changes and potential conflicts:

screenshot of git status

Mermaid diagrams make it easy to review complex agent proposals:

screenshot of mermaid diagram

Project secrets help separate your human and agent identities:

Screenshot of Project Secrets

Keep track of costs and token consumption:

Screenshot of cost table

Opportunistic compaction helps keep references small:

Screenshot of Opportunistic Condensation

See documentation for more details.

See AGENTS.md for development setup and guidelines.

Copyright (c) 2025 Coder Technologies, Inc.

This program is free software: you can redistribute and/or modify it under the terms of the GNU Affero General Public License, as published by the Free Software Foundation, version 3 of that license.

See license for details.



<a href

Leave a Comment