Individual skill
clean-architecture
Apply these opinionated .NET 8 architecture conventions whenever structuring or reviewing a backend service: clean architecture layering and which direction dependencies point, when CQRS with MediatR is worth it, cross-cutting concerns as pipeline behaviours, minimal APIs grouped by feature, keeping DbContext in Infrastructure, health checks and structured logging, WebApplicationFactory integration tests, and when AOT pays off.
plugins/engineering/cortex-dotnet/skills/clean-architecture/SKILL.md
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# .NET Core Architecture
House architecture conventions for .NET 8 backend services. This covers how a service is _structured_; for language-level conventions see the `csharp` skill.
## Layering
Dependencies point inward only. Domain knows nothing about anything else, and Infrastructure is the one layer allowed to reference a database or an SDK — which is what lets the inner layers be tested without either.
```text
Domain entities, value objects, domain events, interfaces → no dependencies
Application use cases, CQRS handlers, DTOs, validators → Domain
Infrastructure EF Core, external APIs, implementations of Domain interfaces → Domain + Application
Api endpoints, DI wiring, middleware → all of the above
```