2. Create the service namespace

To describe a service, you first need to define a “blockless” (file-level, no curly braces) namespace and use the @service decorator to mark it as the service namespace:

@service({
  title: "Contoso Widget Manager",
})
namespace Contoso.WidgetManager;

This marks the Contoso.WidgetManager namespace as a service namespace in this TypeSpec specification and sets its title to “Contoso Widget Manager.”