Use this skill when a task involves enterprise application structure, layering, service layer, transaction script, domain model, data mapper, repository, unit of work, identity map, DTOs, or integration patterns.
Before making design or code decisions, read and apply patterns-of-enterprise-application-architecture.mini.md. Use patterns-of-enterprise-application-architecture.md only as a deeper reference when the mini rules are not enough for the current enterprise-pattern tradeoff.