tmux is awesome but parsed stdout with grep was a nightmare. I added Multiplatform, playwright capabilities, allowing novel ways of use cases. I called it rmux. All 90 commands of tmux are there.
This is a fresh public preview, please let me know what you think about it 😄
I've spent the last few months building RMUX, a terminal multiplexer written from scratch in Rust.
What it is
A tmux-compatible multiplexer with about 90 command snapshots covered in the docs, plus a second surface: a typed async Rust SDK talking to the same local daemon. Many tmux-style workflows, keybindings, and scripts should feel familiar, but RMUX also exposes structured automation primitives instead of only terminal text scraping.
Architecture
Example:
pane.get_by_text("Ready").wait_for().await?;
pane.keyboard().type_text("hello").await?;
pane.wait_for_load_state(TerminalLoadState::Quiet).await?;
pane.expect_visible_text().to_contain("hello").await?;
The public SDK/protocol/render crates use `#![forbid(unsafe_code)]`; unsafe code is isolated in the low-level platform crates that need OS/PTY/IPC FFI.
Why I built it
I've been using tmux for a long time and grew tired of having to do grep every now and since. I then thought that adding playwright capabilities and rewriting everything in Rust would be a game changer. I hope you will like it :) You can do so much: ci, agents orchestration, testing TUIs, building custom dashboards... and it includes natively ratatui.
Repo: https://github.com/Helvesec/rmux
Docs + demos: https://rmux.io
Install: cargo install rmux --locked
It's a v0.2 preview. Very open to feedback on the architecture, the async API design, or how I'm handling ConPTY. Happy to answer anything.