cmux-customize

Use this skill for personal cmux configuration changes stored outside the app source tree, especially ~/.config/cmux/cmux.json and project-local .cmux/cmux.json files. It covers action registry entries, surface tab bar buttons, plus-button click and right-click menu behavior, custom workspace commands, right sidebar wiring, and related config cleanup.

Prerequisites

• Use the cmux-settings skill's cmux-settings helper script for global ~/.config/cmux/cmux.json reads and writes.
• Read the cmux-settings skill first when the task touches standard settings under app, terminal, notifications, sidebar, sidebarAppearance, workspaceColors, automation, browser, or shortcuts.

Reference

Global config:

cmux-settings path
cmux-settings dump --no-comments

Common structural sections in cmux.json: