View the folder beneath /apps/wknd/components named structure.
The AEM project archetype creates a component named page. Editable templates will be used for the WKND site. The name structure matches a specific mode of Editable template and is the common convention when using Editable templates. Any component added into the structure folder indicates that the component is meant to be used when constructing a template, and not to be used when authoring a page.