amux

What amux is

amux is a terminal multiplexer for shared work between people using keybindings and agents using CLI commands. Users can create and arrange panes, manage windows, zoom panes and broadcast keystrokes across panes. Its CLI supports structured JSON session capture, blocking waits and push-based events without an SDK or language-specific library.

Pane history is kept on the server and can persist through detach and reattach, server reload and crash recovery; the default scrollback is 5,000 lines per pane. A built-in mailbox lets panes exchange and acknowledge messages, which recipients check through an inbox rather than receiving as automatic PTY input. An optional local MCP server over stdio exposes tools for that mailbox. amux can mirror remote panes and windows over SSH, forwarding input and streaming remote terminal output. The repository documents agent automation for Claude Code and Codex. It is free and MIT licensed, with installation options including a shell script, Homebrew and `go install`. First server start installs a terminfo entry and requires ncurses `tic`.

Who it suits

amux suits developers coordinating terminal work between people and agents, including users of Claude Code or Codex. It is available for Linux and macOS.

Limits

The default scrollback is 5,000 lines per pane. The project does not implement every tmux feature; session groups and advanced hooks are examples of functionality for which it recommends tmux.

Getting started

1. Install amux using its shell script, Homebrew, or `go install`.
2. Ensure ncurses `tic` is available for the first server start.
3. Start the amux server to install its terminfo entry.
4. Create panes and windows for the shared workflow.
5. Use the CLI for session capture, waits, events, or mailbox operations.

Verdict

amux combines terminal pane controls, agent-facing CLI features and a mailbox for shared workflows. Users who depend on session groups or advanced hooks may need tmux for those functions.