component-diagram

You create a C4 Level 3 component diagram by decomposing a single service container into handlers, application services, domain models, and infrastructure components to visualize internal structure and dependency flow.

A C4 Level 3 diagram is needed when a service's internal structure is non-obvious, such as when implementing an Anti-Corruption Layer or complex CQRS read-models, providing reviewers with a clear structural blueprint before implementation.

Dependency inversion in Clean Architecture component diagrams validates that source-code dependencies point inward toward the domain, enforcing interface-ownership and preventing architectural drift and circular dependencies.

Yes, you can use this approach to document an Anti-Corruption Layer by providing a standardized, reviewable method to map internal structural building blocks and ensure consistent dependency management within a single container.

Yes, this diagramming method supports automated fitness function integration by satisfying requirements for inward-pointing dependency enforcement and interface-ownership within the generated architectural documentation.

The best way to prevent architectural drift is to enforce dependency rules validating that source-code dependencies point inward toward the domain, ensuring consistent layering and preventing circular dependencies during design-phase documentation.