The Real Reason Architecture Diagrams Go Stale

What diagram-as-code teams change in their workflow to keep diagrams useful, current, and easy to review. Most engineering teams have architecture diagrams that were accurate once and then slowly drifted away from the system they were supposed to explain. A service gets split. A queue is introduced. An API boundary changes. The code moves first, and the diagram follows later if anyone remembers. That pattern is usually described as a documentation problem, but the better explanation is workflow friction. The teams that keep diagrams useful are not more disciplined than everyone else. They changed where diagrams fit in the work. Their diagrams are cheap enough to update during decisions, not after them. That is why diagram as code matters. Version control helps, but it is not the whole story. TL;DR : diagram as code is valuable because it turns architecture diagrams into working artifacts inside the engineering loop. Text-based diagrams are reviewable, diffable, and easy to update in th