Comprehension Debt

The growing gap between how much code exists in a system and how much of it any human on the team genuinely understands. Each act of cognitive surrender adds to this debt, which compounds until no one can reconstruct the system from first principles when something breaks.

Comprehension debt is the hidden cost to human intelligence and memory resulting from excessive reliance on AI and automation. For engineers, it applies most to agentic engineering.

There’s a cost that doesn’t show up in your velocity metrics when teams go deep on AI coding tools. Especially when its tedious to review all the code the AI generates. This cost accumulates steadily, and eventually it has to be paid - with interest. It’s called comprehension debt or cognitive debt.

Comprehension debt is the growing gap between how much code exists in your system and how much of it any human being genuinely understands.