A desktop app for isolated, parallel agentic development

Summary

mux - coding agent multiplexer A desktop application for parallel agentic development. Why parallelize? Here are some specific use cases we enable: Contextual continuity between relevant changes : e.g. create a workspace for code-review , refactor , and new-feature : GPT-5-Pro : use the slow but powerful GPT-5-Pro for complex issues Run in the background for hours on end The stream will automatically resume after restarts or intermittent connection issues. If the model completes early we will show an indicator. : use the slow but powerful GPT-5-Pro for complex issues A/B testing : run multiple workspaces in parallel on the same problem but different approaches, abandon the bad ones. : run multiple workspaces in parallel on the same problem but different approaches, abandon the bad ones. Tangent exploration: launch tangents in mux away from main work Features Isolated workspaces with central view on git divergence Local : git worktrees on your local machine (docs) SSH : regular git clones on a remote server (docs) with central view on git divergence Multi-model ( sonnet-4-* , grok-* , gpt-5-* , opus-4-* ) Ollama supported for local LLMs (docs) OpenRouter supported for long-tail of LLMs (docs) ( , , , ) VS Code Extension : Jump into mux workspaces directly from VS Code (docs) : Jump into mux workspaces directly from VS Code (docs) Supporting UI and keybinds for efficiently managing a suite of agents Rich markdown outputs (mermaid diagrams, LaTeX, etc.) mux 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. Read the full documentation → Install Warning mux is in a 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 own development. Download pre-built binaries from the releases page for macOS and Linux. More on instal...