Quick disclaimer up front: the bug below is real, the domain and the details aren’t. I swapped the original (a private codebase I can’t paste from) for a shopping cart, because the shape of the lesson is identical and a cart is a kinder example to read. So when I say “I went to look at the diff” further down, that part’s real. The cart is a stand-in. Indulge me.
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I write about code that works and the craft of building maintainable systems. Expect technical deep dives, pragmatic reflections, and the occasional observation about web development's absurdities.
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