Chesterton's Fence: Why Developers Should Understand Code Before Deleting It

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The concept of Chesterton's Fence — the principle that you should understand why something exists before removing it — applies directly to web development, particularly when inheriting legacy codebases. Developers often encounter unexplained functions, plugins, or CSS snippets that appear redundant but silently serve critical purposes. Removing such code without investigation can cause unexpected breakages, while leaving it untouched out of fear leads to bloated, unmaintainable codebases over time. Historically, a developer somewhere made a deliberate decision that could be traced through commit history or documentation. However, the rise of AI-generated code is making this harder, as snippets are now frequently added to production without any human reasoning or documentation behind them.

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