Here are some other platform features that can help ensure that your application's functionality is open to being extended by Developer X or subscriber org administrators:
- Apex Triggers: Developer X can write their own triggers against your application's managed Custom Objects. These will execute in addition to those packaged. This allows Developer X to implement the defaulting of fields or custom validations, for example. Salesforce does not guarantee that packaged triggers will execute before or after Developer X triggers in the subscriber org. To ensure that all changes are validated regardless of the trigger execution order, perform your validation logic in the after-phase of your packaged triggers. It is recommended that you advise Developer X to be considerate about how much code is written in triggers because the...