smux provides a tmux configuration with Option-key bindings, mouse support, and pane labels. Its core feature is the tmux-bridge CLI, which enables any bash-capable AI agent to read from, type into, and send keystrokes to tmux panes. This allows AI coding assistants like Claude Code and Codex to coordinate with each other across panes by sending commands and reading output. The system installs into ~/.smux/ and handles tmux installation across multiple package managers.