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On 2026-06-26, Charly Wargnier (@DataChaz) announced RMUX, an open-source…

Brief

RMUX, announced 2026-06-26 by Charly Wargnier (@DataChaz), is a Rust-built terminal multiplexer that goes beyond a tmux clone by running a local daemon to manage PTY and process lifecycles and exposing 90+ native commands. It offers official Python/TypeScript/Rust SDKs, native macOS/Linux/Windows support (no WSL), browser live-pane sharing with post-quantum encryption, and is MIT/Apache-2.0 licensed.

Why it matters

On 2026-06-26, Charly Wargnier (@DataChaz) announced RMUX, an open-source Rust-based terminal multiplexer that runs a local daemon to natively manage PTY and process lifecycle and supports 90+ native commands.

Key details

  • RMUX provides official SDKs for Python, TypeScript, and Rust, runs natively on macOS, Linux, and Windows (no WSL required), and is released under MIT/Apache-2.0 licenses.
  • RMUX can securely share a live terminal pane to a browser via a decoupled static UI protected by post-quantum encryption; it is free and open-source.
Source evidence

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Charly Wargnier (@DataChaz)

If you spend your day in the terminal, your core infrastructure just got an upgrade.

🚨 A new open-source project called RMUX is about to make your command line INSANELY more powerful.

Sure, it’s a new Rust-based terminal multiplexer, but calling it a "tmux clone" completely misses the point.

Instead of just splitting windows, RMUX runs a local daemon that natively manages your entire PTY and process lifecycle.

Here is what makes it a shift:
→ Drives exactly like tmux (90+ native commands)
→ Built from the ground up in Rust
→ Fully programmable via official Python, TypeScript, and Rust SDKs
→ Runs natively on macOS, Linux, and Windows (no WSL required)

The wildest feature?

You can securely share a live terminal pane directly to a browser!

It uses a decoupled static UI protected by post-quantum encryption 💥💥💥

Best of all: it is 100% free and open-source (MIT/Apache-2.0).

Here is a breakdown of why this matters 🧵↓

Video

— https://nitter.net/DataChaz/status/2070416014551216305#m