SMRTR ProgrammingSep 7, 2026Daily.dev

I tested 5 AI tools for refactoring CSS: Here’s what I learned

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Five AI coding tools — ChatGPT, Claude, Copilot, Cursor, and Gemini — were tested against seven deliberately tricky CSS refactoring scenarios covering cascade order, stacking contexts, and selector scoping. Every single tool introduced at least one bug, even in a single-file component. Cursor ranked first by avoiding unique regressions, while Gemini finished last failing three tests outright.

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