The product and workflow layer owns the user experience, domain records, business process, and outcome semantics that give runtime execution meaning.
Owns
- User-visible state and business records.
- Domain validation and workflow transitions.
- Product authorization and account-level rules.
- Outcome measurement, customer communication, and durable systems of record.
Does not delegate
A model or agent runtime may propose an action, but the product layer remains responsible for validating domain rules and committing business-significant state through controlled interfaces.