Action helpers are custom functions that are available to your controllers that expose common controller-related methods without having to extend a base controller.
You can expose any function on a singleton bean or a helper as an action helper by adding an @actionHelper {name} annotation to the function.
When you first create an application using ColdMVC, you'll already have access to a standard set of action helpers. The most prominent action helper is the redirect() method that allows you to redirect the browser after you perform an action.