# Modular Monolith Use this when the app is organized into named packages, packs, engines, or bounded contexts. ```ruby architecture :modular_monolith, components: { billing: "packs/billing/**/*.rb", catalog: "packs/catalog/**/*.rb", shared: "packs/shared/**/*.rb" }, allow: { billing: %i[shared], catalog: %i[shared] } ``` Every component gets an allowlist. If a component is omitted from `allow`, it may not depend on any other declared component. Alias: ```ruby architecture :bounded_contexts, components: { ... }, allow: { ... } ``` ArchSpec also adds a cycle check across the declared components.

Modular Monolith

Use this when the app is organized into named packages, packs, engines, or bounded contexts.

Every component gets an allowlist. If a component is omitted from allow, it may not depend on any other declared component.

Alias:

ArchSpec also adds a cycle check across the declared components.