Wagn has four actions: Create, Read, Update, and Delete.
Read actions are about viewing card data. They can be configured by Wagneer by using views, structure, Layout, and other wagn rules. And they can be configured by mod developers by coding views and editing Format methods.
The other three are about transforming card data. Create, Update, and Delete actions can be customized by Wagneer by using action extensions. And they can be customized by mod developers by coding events and editing Card methods.