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cmux

97 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By glebis/claude-skills (GitHub) · coding · 413 stars · scanned at commit 4d37d3b

Controls the cmux macOS terminal app (Ghostty-based, AI-agent-aware) via its CLI socket API. Use this skill to: open browser preview panes when a dev server starts or an HTML file is created; spin up named workspaces for parallel subagents; show live sidebar progress/status during long tasks; open utility splits on demand (logs, URLs, terminals) in any direction. Also handles `/cmux demo` — an interactive walkthrough with 3 screens of options that runs personalized live demos. Trigger when: a s…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'cmux' ] || [ -L ~/.agents/skills/'cmux' ]; then echo 'A skill folder named cmux already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/glebis/claude-skills' "$d" && git -C "$d" checkout --quiet '4d37d3b0af1f98cb4ac820d9abbce95e38e909fb' -- 'skills/cmux' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/cmux' ~/.agents/skills/'cmux' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'cmux' ~/.claude/skills/'cmux' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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