I am Thomas De Vos, a software and AI architect with more than 25 years of experience. I write technical books about Claude Code and production AI systems. My courses focus on practical engineering work: understanding existing behaviour, testing a proposed change, and deciding whether the evidence is strong enough to proceed.

In this course, you work through a small legacy-modernization lab rather than watch a broad tour of features. You recover a business rule, make a bounded correction with Claude Code, and check the result. The aim is a change you can explain and verify, including how to roll it back.