What do the British writer and his fence have to do with Software Architecture?
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Chesterton's Fence — the principle that you shouldn't remove something until you understand why it exists — applies directly to software development. Before deleting or refactoring code that seems pointless, developers should first understand its purpose. A practical four-step approach is outlined: document your understanding and validate it with business stakeholders, write end-to-end tests before touching the implementation, record decisions and principles in a Markdown file kept in the repository, and only then decide whether to remove or refactor the code. This incremental, evidence-based approach reduces risk, avoids breaking working software, and leaves a decision log for future maintainers.
