Begin with a product record
Your operational systems know what you sell. A product record needs an identity that survives transformations: a variant should not become a different item when it moves from a PIM to a storefront to a feed. Price and stock may change more quickly than descriptive content. Record who owns each field and how an update reaches each destination.
Distribution and commerce are separate jobs
A feed packages information for a destination. A commerce interface can expose operations such as creating or updating a checkout. A transport carries messages. Payment and authorization mechanisms address how an action can be funded and permitted. One provider may span several jobs, but the jobs remain separate. This is why two protocols can be complementary even when both appear in an integration diagram.
Close the loop with evidence
Monitor what is actually observable: a successful feed delivery, a correctly displayed item, a sampled public field or an authorized test in the provider’s sandbox. Keep the environment and date with the observation. Do not combine laboratory tests, vendor announcements and live merchant results into one unlabeled readiness claim.