Comprehension debt is the accumulated difficulty of explaining, trusting, and safely evolving code that works without being fully understood. It often follows unsupervised agentic coding: generated code may compile and pass tests while its complete design remains unclear. section 1.2.2
The debt becomes visible when the system must be:
- debugged after an unexpected failure section 1.2.2
- changed to meet a new requirement section 1.2.2
- examined for a security vulnerability section 1.2.2
The delayed cost
A generated solution solves an immediate problem and passes its tests. Later, a bug or requirement change forces the team to reconstruct a design it never fully understood, turning an apparent time saving into maintenance risk. section 1.2.2
Reduce comprehension debt by keeping human judgment, supervision, and responsibility for the final design central to development. Readability, maintainability, clarity of intent, and durability make code easier to trust and evolve. section 1.3
