Lab: The eight tools, guarded and tested

Module 3 · Lab · About 75 minutes · Needs: lessons 1, 2 and 3 (tool definitions and call_tool; make_safer_tools and make_retry_safe_tools; make_failure_safe_tools, FlakySystems and the guards)

What you are building

The lessons built the tools in a notebook, one layer at a time. This lab moves their final form into returns_desk/tools.py, the file Module 3 adds to the package: the simulated systems, the eight tools, the definitions the model reads, one function every call goes through, and Lesson 3's guards, stacked. Tests then pin every gap the lessons found, and a real model works Mei's cancellation, R-1004, while payments and email misbehave. Everything at BrightCart is simulated.