cmux Customization Keep the user's config intact, prefer schema-backed edits, and validate before reporting completion. For content viewers, start with the viewer customization matrix. It maps each viewer to the settings, command, or external file that owns its knobs, including explicit fallbacks for viewer types whose template settings have not shipped yet. Choose the right surface | Want to change | Edit | |---|---| | App preferences (appearance, sidebar, notifications, browser routing, automation, shortcuts, new-workspace placement) | via the helper | | Custom actions, workspace layouts/co…