Why bother

Presentation components that also do business logic don't scale. They grow, split awkwardly, and become hard to test. Pulling logic out into composables and use-cases keeps the view layer thin and the rules testable on their own.

The layers I actually use

• Views — .vue files. Props in, events out. Render state.
• Composables — reactive glue. Hold state, call use-cases, expose refs the view consumes.
• Use-cases — plain functions. Orchestrate domain rules. No Vue imports.
• Gateways — anything that talks to the outside world (HTTP, storage). Wrapped behind a thin interface.

Where I stop

I don't add layers I don't need. A form component that just calls one API doesn't need a dedicated use-case — the composable is enough. Layers earn their place by making something reusable, testable, or swappable. If none of those apply, skip it. This is a dummy post — published as placeholder content.