Xum - Coding Agent Multiplexer
[!IMPORTANT] This project was renamed from Mux to Xum after Mux.com raised a trademark concern. “Mux” is a common technical abbreviation of “multiplexer” and we do not expect confusion between the projects, but chose to rename ours rather than spend more time on the dispute.
Features
- Isolated workspaces with central view on git divergence (docs)
- Multi-model (
sonnet-4-*,grok-*,gpt-5-*,opus-4-*) - VS Code Extension: Jump into Xum workspaces directly from VS Code (docs)
- Supporting UI and keybinds for efficiently managing a suite of agents
- Rich markdown outputs (mermaid diagrams, LaTeX, etc.)
Xum has a custom agent loop but much of the core UX is inspired by Claude Code. You'll find familiar features like Plan/Exec mode, vim inputs, /compact and new ones
like opportunistic compaction and mode prompts.
Install
Download pre-built binaries from the releases page for macOS and Linux.
Screenshots
Integrated code-review for faster iteration
Agents report their status through the sidebar
Git divergence UI keeps you looped in on changes and potential conflicts
Mermaid diagrams make it easier to review complex proposals from the Agent
Stay looped in on costs and token consumption
Context management dialog keeps compaction controls in one place
Xum server mode has a responsive UI for mobile users
More reading
See the documentation for more details.
Development
See AGENTS.md for development setup and guidelines.
License
Copyright (C) 2026 Coder Technologies, Inc.
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, version 3 of the License.
See LICENSE for details.