Technical Debt in the AI Era Is Accumulating at a Different Rate
Technical debt was always a metaphor with a compounding interest rate. Decisions made quickly to ship a feature cost more to address the longer they remained in the codebase. Teams that managed debt well built systems that stayed malleable. Teams that ignored it built systems that eventually could not be changed without risk of collapse.
AI-assisted development has not eliminated this dynamic. It has accelerated the principal. The speed at which code can be generated means that architectural decisions — or the absence of them — propagate through a codebase faster than ever before. A pattern established in the first week of a sprint can be replicated across dozens of modules by the end of it, because generation is fast and the model has learned the pattern from the code already present. Inconsistency scales. Shortcuts scale. Missing abstractions scale.
The specific failure mode is what might be called coherence debt: code that is individually correct but architecturally incoherent, where each component does its job but the seams between components have not been designed, only generated. This kind of debt is harder to see than a poorly named variable or a missing error handler. It reveals itself when you try to change something that should be simple and discover that the change propagates in unexpected directions because the boundaries were never intentional.
Addressing this requires doing something that feels counterproductive at high throughput: slowing down to design before generating. Establishing interfaces before implementations. Making architectural decisions explicitly and recording them, so that the generation that follows has a structure to conform to rather than a vacuum to fill.
The teams that will have manageable codebases in two years are the ones investing now in architecture decision records, interface design, and explicit module boundaries. The teams generating at full speed into an undefined structure will have codebases that function and cannot be extended — which is the definition of technical debt at its worst.