1. Require a category before querying records
2. A PHP-controlled search without settings UI
3. Only Customers and Orders
4. One explicit customer source
5. A source below a parent resource
6. Search more than one panel
7. Add an authorized help command
8. Open a category from a native action
customers is a registered custom source ID. For native resources, derive the source ID in PHP instead of guessing it. See the quickstart event examples.