Mateusz Jabłoński - Blog, programming, selfdevelopment
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Your Agent in the Fight Against Legacy Code

Legacy code rarely loses to one big refactor. More often, it requires patient work, good context, small steps, and sensible verification. An AI agent can help with that, but only if we treat it as a tool for working with code, not as a magical way to pay off technical debt.

Category

Programming

Publication date

30 June 2026

Level

regular

Mateusz Jabłoński

Frontend Developer with a passion. Husband in love. Proud father. Gamer by choice.

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From this article you will learn:

  • Why is legacy code a difficult environment for AI agents?
  • How can we prepare context so the agent does not work blindly?
  • When is it worth asking an agent for analysis, and when for a code change?
  • How can we control small steps, tests, and regression risk?
  • Where does an agent's help end and the programmer's responsibility begin?

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Mateusz Jabłoński

About the author

Mateusz Jabłoński

I've been programming since 2011, and it has become a passion I want to share with others. In addition to creating articles and podcasts, I also run workshops and training sessions. I work primarily in the frontend ecosystem, but I’m no stranger to backend challenges either.

You'll find me

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