01
Start with contracts, not plugins
List the data that crosses each boundary: content fields, CRM properties, consent state, cache keys, webhook payloads and deploy signals. Name the system that owns each value and the behaviour when that system is unavailable.
A plugin can implement a contract. It should not be the only place where the contract is understood.
02
Give editors a coherent content model
Post types, taxonomies, relationships and reusable modules should reflect how the business publishes. A field exists because an editor or integration needs a stable meaning, not because a design has an empty rectangle.
The administration guide is part of the architecture. If editors cannot predict where content appears, the model is incomplete.
03
Design external systems as fallible
CRM, translation, security and search services need timeouts, validation, last-known-good behaviour and observable errors. Request-time dependencies should be kept small and cached when the content can tolerate it.
The website must know which failures can be retried, which can be queued and which must remain visible to an operator.
04
Operate the complete path
Deployment, cache invalidation, schema validation, analytics consent and performance budgets belong in the same platform view. A theme release that breaks CRM attribution is still a failed release.
This wider frame is what lets a WordPress team improve the system without turning every change into a risky cross-team event.