Select a text, then use the command
CoffeeScript Check: Check: if the selection (or the whole file if there's no selection) is CoffeeScript or Literate CoffeeScript, the plugin compiles it and shows the result in a notification.
The notification provides a "Copy to clipboard" button to copy the compiled result.
With the success of Atom, it's really difficult to choose keybindings that will not enter in conflict whit anyone else's packages, so I have removed the default keystrokes and let the keymap empty to let you set your own keybindings.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.