Module 15 Summary

What this module established

Write the contract first - request, response, every error and the guarantees. Each guarantee becomes a test and each constrains what you may build later.

Carry forward

• State the import rules alongside the directory layout. The structure is obvious; the constraints are what preserve it.
• Build the suite so nearly every test runs offline. Only the live model call is an integration test.
• Decide the logged fields, bounds and alerts before the first real request, and enforce every bound in code.

Before moving on

You have finished when every guarantee has a test, every bound is enforced, and your handover names a gap that follows from a limit you listed.

Mark complete