Cmux Terminal Multiplexer

This is a terminal multiplexer purpose-built for AI agents that need to orchestrate multiple processes and browser sessions simultaneously. It lets Claude spawn terminal splits, send commands, capture output, and run full Playwright-equivalent browser automation through a CLI socket API, all without stealing focus from your main shell. The snapshot-based element references are smarter than CSS selectors since they survive minor DOM changes, and the sidebar status reporting means you can actually see what parallel agents are doing. If you're building workflows where Claude needs to run tests in one pane while scraping docs in a browser and tailing logs in another, this gives you the primitives to do it cleanly. Built by the ara.so team.

skills.sh installs: 1.4K
GitHub stars: 61
last updated: Jul 14, 2026

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Install

$ npx -y skills add aradotso/trending-skills --skill cmux-terminal-multiplexer --agent claude-code

Installs into .claude/skills of the current project.

Files

cmux — AI-Native Terminal Multiplexer

Skill by ara.so — Daily 2026 Skills collection

cmux is a terminal multiplexer with a programmable socket API designed for AI coding agents. It provides full Playwright-equivalent browser automation, real-time terminal split management, sidebar status reporting, and agent team coordination — all via a simple CLI.

What cmux Does

Terminal splits — create side-by-side or stacked panes, send commands, capture output
Browser automation — full headless Chromium with snapshot-based element refs (no CSS selectors)
Status sidebar — live progress bars, log messages, and icon badges visible to the user
Notifications — native OS notifications from agent workflows
Agent teams — coordinate parallel subagents, each with their own visible split

Orient Yourself

cmux identify --json          # current window/workspace/pane/surface context
cmux list-panes               # all panes in current workspace
cmux list-pane-surfaces --pane pane:1  # surfaces within a pane
cmux list-workspaces          # all workspaces (tabs) in current window

SKILL.md on GitHub