AI Can Write More of the Code. We Still Have to Engineer the System

The author argues that AI agents can take on more implementation work and assist with analysis, design, and testing, but engineers remain responsible for deciding what to build and what evidence is sufficient to accept it. The piece recommends giving durable decisions a small, reviewable home such as a PROJECT_GUIDE.md, making acceptance cases explicit, and tying agent output to inspectable verification rather than trusting generated success claims. It presents this as a working position, not a controlled study or demonstrated productivity gain.