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How to Write an Effective Software Design Document

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Hacker News | Sep 14, 2026 | fagnerbrack

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A good design doc can save you years of development time. I’ve never seen a public design doc that I consider high-quality. Sometimes, the right amount to invest in a design doc is zero. What belongs in a design doc? 🔗If you specify every possible detail in a design doc, you’ve essentially written the implementation during the design phase.

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