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Hamza Belgacem
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AI and Technical Debt: How to Avoid Building on a Fragile Foundation

Published on October 12, 2026

AI speeds up code production, but also accelerates technical debt. Here's how a business leader can assess and control that risk before it becomes expensive.

AI has changed the economics of writing software. A feature that once took a sprint can now be scaffolded in an afternoon, and a prototype that once needed a small team can be assembled by one person with a good prompt. That speed is real, and it is genuinely valuable. But speed in production is not the same as speed in maintenance, and the gap between the two is where technical debt quietly accumulates.

Technical debt is not a moral failing. It is the normal consequence of choosing a fast solution today over a slower, cleaner one. The problem with AI-generated code is not that it is bad. It is that it is produced faster than teams can review, understand and own it. When code arrives faster than comprehension, you are not building a foundation. You are stacking floors on scaffolding nobody has inspected.

Why AI accelerates debt, not just delivery

Three mechanisms are worth understanding.

First, volume. When generating code costs almost nothing, teams generate more of it. More files, more dependencies, more endpoints, more abstractions. Each individual piece may look reasonable. Collectively, they form a system nobody has fully read.

Second, plausibility. AI models are trained to produce code that looks correct. It compiles, it follows familiar patterns, it reads cleanly. That plausibility is exactly what makes review harder. A human writing a shortcut usually leaves traces — a comment, an odd variable name, an unfinished edge case. Generated code often hides its shortcuts behind confident, idiomatic style.

Third, duplication. Ask a model to solve the same problem twice in different parts of a codebase and you may get two valid, incompatible solutions. Without a human deciding which pattern is canonical, the codebase drifts toward inconsistency, and inconsistency is expensive to maintain.

The debt that AI specifically creates

Not all debt is equal. The AI era produces a few recurring kinds:

  • Comprehension debt. The team ships code faster than it can understand it. Nobody can confidently explain what a module does or why it exists.
  • Dependency debt. Generated code tends to pull in libraries freely. Each one is a future upgrade, security patch and compatibility question.
  • Prompt-shaped architecture. Systems designed around what was easy to generate rather than what the domain actually requires.
  • Hallucinated integrations. APIs, parameters or configuration that look right but were never verified against real documentation.
  • Missing context. Generated code rarely encodes the business rules, compliance constraints or edge cases that live in people's heads.

None of these show up as errors on day one. They show up as slow delivery six months later, when every change requires archaeology.

A practical way to assess your exposure

You do not need a formal audit to get a useful signal. Ask four questions about any AI-assisted project.

1. Can a developer on your team explain, without notes, what the most complex module does and why it is built that way? If not, you have comprehension debt.
2. If the AI tool disappeared tomorrow, could you still maintain and extend the system? If the answer is no, the tool has become a dependency rather than an accelerator.
3. How many external libraries were introduced in the last quarter, and who decided they were necessary?
4. Are there tests that describe intended behaviour, or only tests that confirm the code runs?

Honest answers to these four questions tell you more than any dashboard.

How to keep the foundation solid

Make review non-negotiable. AI-generated code should pass through the same review as human code, with one addition: the reviewer must be able to explain it. If nobody can, it does not merge. This single rule prevents most comprehension debt.

Assign ownership. Every module needs a human owner. Ownership forces understanding, and understanding is what makes future changes cheap.

Constrain dependencies deliberately. Treat every new library as a long-term commitment. If a few lines of your own code would do the job, write them.

Verify every integration. Never trust a generated API call until it has been tested against the real service. This is the cheapest possible insurance.

Document decisions, not code. Code shows what was built. Only documentation shows why. A short note on each significant choice saves hours later.

Refactor on a schedule. Set aside time to consolidate duplication and remove what is no longer used. Debt compounds; so does the cost of ignoring it.

The balance to aim for

AI is genuinely good at the early, exploratory phase of software: trying an idea, testing an approach, getting something in front of users quickly. It is less reliable as a substitute for architectural judgement. The teams that benefit most treat AI as a fast first draft and human review as the thing that turns a draft into an asset.

Speed is worth having. It is only worth having if you can still move quickly a year from now.

Let's talk about your project

If you are building with AI and want an honest read on where your foundation is solid and where it is fragile, I am happy to look at it with you. No pitch, just a conversation about what you are building and what it will need to stay maintainable. You can reach me at contact@hamzabelgacem.com.

Ready to build something intelligent?

I code. I understand. I build with you.

AI and Technical Debt: How to Avoid Building on a Fragile Foundation · Hamza Belgacem