Rmux

RMUX

RMUX is a Rust terminal multiplexer with a tmux-compatible CLI, a typed SDK, browser web-share, and a Claude Code launcher. Prefer checking the installed binary instead of assuming a version:

rmux -V
rmux list-commands
rmux list-commands send-keys

If RMUX is missing, suggest installing the published package for the user's platform or cargo install rmux --locked.

This repository ships this source copy at resources/claude/skills/rmux/SKILL.md so the project can package and install it without keeping a hidden .claude directory in the source tree. To use the guidance, run rmux claude install-skill; it installs a user-level copy under ~/.claude/skills/rmux on Linux/macOS or %USERPROFILE%\.claude\skills\rmux on Windows.

Claude Code

Use rmux claude [args...] to run Claude Code inside an RMUX workspace with tmux teammate mode enabled.

rmux claude
rmux claude --dangerously-skip-permissions

RMUX passes --teammate-mode tmux to Claude and scopes a private tmux shim to the Claude process. The shim lets Claude's tmux-compatible teammate commands drive RMUX panes without replacing the user's system tmux. Set RMUX_DISABLE_TMUX_SHIM=1 only when the user explicitly wants to disable that shim.

For reliable Claude Code workflows, prefer rmux claude over starting a plain daemon from inside an arbitrary Claude shell. On Unix, if the user is not using rmux claude and their daemon is killed when Claude recycles a shell, starting the daemon with setsid rmux new-session -d -s NAME can detach it from that shell. setsid is Unix-only; on Windows, use rmux claude.

Agent Automation

Avoid blind sleeps. Send input with a bounded wait and inspect output when needed:

rmux new-session -d -s work
rmux send-keys -t work --wait quiet --stable-for 500ms --timeout 2m -- 'cargo test' Enter
rmux capture-pane -t work -p

Recommended waits:

• --wait quiet waits for output to settle and is the default choice for builds, tests, and shell commands with unknown final text.
• --wait-next-text TEXT waits for new output only and avoids matching old scrollback.
• --wait-visible-text TEXT waits for rendered visible text.
• --wait-pane-exit is for one-shot pane processes that are expected to exit.
• Always pair waits with --timeout.

When using send-keys with any --wait* flag, put -- before the payload keys. --wait-text and --wait-next-text observe raw PTY output, including shell echo. If the marker appears in the command itself, prefer --wait quiet or disable shell echo first.

Useful automation commands:

rmux wait-pane -t work --quiet --timeout 30s
rmux stream-pane -t work --lines
rmux collect-pane-output -t work --until-pane-exit --max-bytes 1048576

CLI Basics

RMUX mirrors tmux syntax for common session, window, and pane operations:

rmux new-session -d -s NAME
rmux attach-session -t NAME
rmux list-sessions
rmux split-window -h -t NAME
rmux split-window -v -t NAME
rmux list-panes -t NAME
rmux kill-session -t NAME
rmux kill-server

Use rmux list-commands COMMAND to confirm the exact tmux-compatible flags for the installed version.

Web Share

Use rmux web-share to open an existing pane or session in a browser. Operator links can send input; spectator links are read-only.

rmux web-share
rmux web-share -t work
rmux web-share --spectator-only
rmux web-share --operator-only
rmux web-share --tunnel-provider localhost-run
rmux web-share --no-pin
rmux web-share --ttl 3600
rmux web-share list
rmux web-share stop SHARE_ID

For public read-only demos, prefer --spectator-only and put external per-client throttling at the tunnel, CDN, or reverse proxy layer.

SDK

RMUX exposes typed SDKs. The Rust crate is rmux-sdk; Python is librmux; TypeScript is @rmux/sdk. Prefer the SDK for structured automation instead of parsing terminal text when the task is programmatic.

Rust shape:

use rmux_sdk::{EnsureSession, EnsureSessionPolicy, Rmux, SessionName};

let rmux = Rmux::builder().connect_or_start().await?;
let session = rmux
    .ensure_session(
        EnsureSession::named(SessionName::new("work")?)
            .policy(EnsureSessionPolicy::CreateOrReuse)
            .detached(true),
    )
    .await?;

let pane = session.pane(0, 0);
pane.send_text("printf 'ready\\n'\n").await?;
pane.wait_for_text("ready").await?;
let snapshot = pane.snapshot().await?;
println!("{}", snapshot.visible_text());

Key SDK reminders:

• send_text sends text; include a trailing newline when the shell should run the command.
• send_key sends a named key such as Enter or C-c.
• Prefer daemon-side waits such as wait_for_text_next when available.
• Killing the last session can shut down the daemon; reconnect before more operations.