cmux-config

Single entry point for editing a user's cmux configuration in ~/.config/cmux/cmux.json (JSONC). The app watches the file; saving applies changes immediately, no restart. Legacy ~/.config/cmux/settings.json is read only as a fallback for keys absent from cmux.json.

Three areas, each with a reference:

• Settings — typed preferences under app, terminal, notifications, sidebar, sidebarAppearance, workspaceColors, automation, browser, shortcuts. See the helper below and references/all-keys.md / references/shortcut-actions.md.
• Customization — structural config: actions, ui.surfaceTabBar.buttons, ui.newWorkspace (plus-button click + context menu), commands, rightSidebar, vault. See references/customize.md.
• Workspace groups — collapsible anchor-owned sidebar sections via the cmux workspace group CLI / socket API and workspaceGroups config. See references/groups.md.