Series: The Architecture of Expansion - Part 2 Building Universes from Code: The Shield of Regression - Series: The Architecture of Expansion - Part 2 When we introduce new complexity into a stable system, we are essentially introducing "entropy." Without a protective structure, the new code will inevitably clash with the old. This is where we employ the most critical tool in the engineer’s arsenal: The Regression Test. In the lab, we think of testing as a form of digital gra