The Universal Multiplexer Engine.

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Note

RMUX now has an E2E web multiplexing feature. Learn more in the docs.

RMUX now provides Python and TypeScript SDKs: librmux, @rmux/sdk.

If you have a feature request or want to report anything, please file an issue.

🧭 What is RMUX?

RMUX is an async, typed terminal multiplexer engine written in Rust. It implements 90+ tmux commands and runs natively on Linux, macOS, and Windows with no WSL required.

Use it as a standalone CLI, embed it in Rust terminal apps, or drive it through typed SDKs for Rust, Python, and TypeScript.

✨ Features

• Universal engine: typed SDKs for Rust, Python, and TypeScript.
• Native cross-platform runtime: Linux, macOS, and Windows backends.
• tmux-compatible command surface: 90+ commands covered by focused compatibility tests.
• Engineered and optimized for speed: see Benchmarks.
• Web Share: browser-shared sessions with hybrid post-quantum end-to-end encryption.
• Ratatui widget: render live RMUX panes inside Rust terminal applications.
• Local daemon architecture: shells, panes, windows, sessions, and scrollback stay on your machine.

🚀 Quick Start

rmux list-commands
rmux new-session --help
rmux split-window --help
rmux web-share --help
rmux diagnose --human

Use rmux -V for the installed version.

🎬 Demos

Multi Agents Orchestration ≃ 514 lines

Agent Broadcast Arena ≃ 2,171 lines

Mini-Zellij ≃ 944 lines

Terminal Automation ≃ 1,495 lines

📦 Installation

Platform / manager	Command
/ Homebrew	brew install rmux
/ installer	irm https://rmux.io/install.ps1 | iex
/ WinGet	winget install rmux
/ Scoop	scoop bucket add rmux https://github.com/Helvesec/scoop-rmux && scoop install rmux
/ Chocolatey	choco install rmux
/ APT	See the APT setup guide
/ DNF	See the DNF setup guide
/ Nix	nix profile install github:Helvesec/rmux
/ Cargo	cargo install rmux --locked

Direct downloads (.tar.gz, .deb, .rpm, .zip) are available from the v0.7.0 GitHub Release.

Package managers can lag while registries review new releases; direct downloads and the rmux.io installers track the current GitHub Release.

Release packages may use a tiny public CLI for hot detached commands and a private full CLI helper for complex tmux-compatible command forms. Windows packages ship rmux.exe as the tiny dispatcher and keep the full CLI under libexec/rmux/rmux.exe. Set RMUX_DISABLE_TINY_CLI=1 to force the full helper while diagnosing CLI compatibility issues.

🤝 Claude Teammate Mode

Run Claude Code inside a local RMUX workspace with tmux teammate mode enabled.

rmux claude [args]
# e.g., rmux claude --dangerously-skip-permissions

RMUX opens an attached session and automatically passes --teammate-mode tmux along with your [args] straight to Claude.

How it works under the hood: to route commands properly, RMUX prepends a private tmux shim to Claude's PATH. This is strictly scoped to the Claude process and will not conflict with your system tmux installation.

Note: Requires claude to be installed on your machine.

⚙️ Configuration

RMUX reads .rmux.conf from standard system and user locations.

On Linux and macOS:

/etc/rmux.conf
~/.rmux.conf
$XDG_CONFIG_HOME/rmux/rmux.conf
~/.config/rmux/rmux.conf

On Windows:

%XDG_CONFIG_HOME%\rmux\rmux.conf
%USERPROFILE%\.rmux.conf
%APPDATA%\rmux\rmux.conf
%RMUX_CONFIG_FILE%

If no RMUX config is found, RMUX can parse standard tmux.conf paths on a best-effort basis. Unsupported plugin lines are reported without aborting startup. Disable this fallback with RMUX_DISABLE_TMUX_FALLBACK=1.

🌐 Web Sharing

Share a pane or session in a browser while terminal execution remains local.

rmux web-share
rmux new-session -d -s work
rmux web-share -t work
rmux web-share --tunnel-provider localhost-run

Web Share uses hybrid post-quantum end-to-end encryption and can run over loopback, a tunnel provider, or your own ingress.

• Repository Web Share overview
• Web Share docs
• Security model
• Tunnel providers

🧰 Scripting & API

The SDKs connect to the local RMUX daemon and expose sessions, panes, streams, waits, and snapshots for automation.

cargo add rmux-sdk
pip install librmux
npm install @rmux/sdk

• Rust SDK: rmux-sdk
• Python SDK: librmux
• TypeScript SDK: @rmux/sdk
• API reference
• Examples
• Repository SDK overview

📚 Documentation

The full documentation is available at rmux.io/docs.

• Installation guides
• CLI reference
• Examples
• API reference
• Human-friendly config
• Web Share

🏗️ Architecture

RMUX keeps shells, sessions, windows, panes, and PTY processes inside the local daemon. Local clients attach via IPC. Web Share exposes only the selected pane or session through an end-to-end encrypted WebSocket.

🧪 Verification

The workspace is designed to be checked from source with locked dependencies:

cargo fmt --all -- --check
cargo clippy --workspace --all-targets --locked -- -D warnings
cargo test --workspace --locked --no-fail-fast
scripts/unsafe-check.sh

#![forbid(unsafe_code)] is used in the upper-level crates. OS and terminal boundary code is isolated in lower-level runtime crates.

⚖️ License

RMUX is dual-licensed under either:

• MIT License
• Apache License 2.0

at your option.