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Working Effectively with Legacy Code

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11:00

2026-09-22

dev.to

ai-tools

AI Coding Tip 037 - Stop Patching Blind

A developer argues that AI-generated code patches should never be applied to untested legacy modules without first writing characterization tests, citing a September 2026 Microsoft Excel security upda…

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Microsoft 1 Excel 1 KB5002914 1 KB5002665 1 Michael Feathers 1

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ai tools 1 developer tools 1 ai products 1