Wiring Everything Together

At this point, the application already has the basic Autumn rhythm: an entry point, a controller boundary, and a service layer.

A Small Final Snapshot

app/
  controllers/
    hello.py
  services/
    greeting.py
main.py

Final Result

The application now looks predictable: controllers receive requests, services execute logic, and the structure stays readable even as the project grows.

This is a simple but stable foundation. You can layer new capabilities on top of it gradually without losing control over the code or its structure.

From here, things grow naturally: routes become more complex, dependencies appear, configuration expands, and infrastructure joins in. But the principle stays the same: clear boundaries, separated responsibilities, and minimal magic.