layered-rails
Layered Rails Architecture
Audience: Rails developers working on applications that have outgrown single-file patterns. Goal: Know which layer code belongs in, when to extract, and which existing skill handles the implementation.
Four-Layer Architecture
Presentation → Application → Domain → Infrastructure
(HTTP/UI) (Orchestration) (Business) (Persistence/APIs)
Core rule: Lower layers MUST NOT depend on higher layers. Data flows top-to-bottom only.
Layer Responsibilities
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