Register a native ComfyUI command (assignable in Settings > Keybindings, no default combo) that kills all comfy-env isolation workers, shows a green success toast, and logs the count. Rewrite /workerkeeper/kill_all to use the silent _shutdown_worker path so no comfy-env shutdown noise appears. Add WEB_DIRECTORY and js/killall.js frontend extension with a WorkerKeeper settings group.