Module 10 Summary

What this module established

One request model, one handler, one response shape - and TestClient to exercise it in-process. Put validation on the request model so it runs before your code and cannot be forgotten by a new endpoint.

Carry forward

• Stream progress freely; stream content only when it does not need to pass a later check. A draft awaiting approval does not belong in the answer position.
• Set your timeout shorter than the infrastructure in front of you and include a request id. A generic 504 carries nothing actionable.
• For anything slow, accept and return an id. A held-open connection fails on exactly the networks your users have.

Before moving on

Move on when your endpoint is exercised with no server, validation runs before the handler, and slow work has left the request path.

Mark complete