Why software fundamentals matter more than ever

Area: Architecture · Level: Intermediate

AI does not replace engineering judgment: it amplifies it. This video explains why fundamentals matter more with agents, not less, through two practical threads: TDD (red → green → refactor) and reshaping shallow modules into deep, testable ones.

What you'll learn

• Why judgment and fundamentals carry more weight when an AI writes the code
• The full TDD cycle — red → green → refactor — applied to working with agents
• What separates a shallow module from a deep one — and why agents perform better in deep ones
• How to reshape shallow modules into deep, testable ones
• Why testability defines how much work you can delegate with confidence

For whom

For experienced developers already working with agents who want AI to raise — not erode — the quality of their architecture. If you come from the hand-written-code world, this is where you'll see which parts of your judgment are now worth more than ever.

After this video

Return to the written lesson The Big Idea — the 7 rules: the working system where these fundamentals stop being abstract principles and become concrete rules for every session.