Use when users create, generate, or validate Salesforce Custom Object metadata. Trigger on custom objects, .object files, sharing models, name fields, or validation rules — e.g. "create a custom object" — and deployment errors around sharing models and Master-Detail relationships. Also keep the object's <description> current when its fields or validation rules change. Do NOT use for non-Custom-Object metadata (Apex, Flows, LWC, Permission Sets, Custom Metadata Types) or standard objects.
