"If you haven't come across them yet, DESIGN.md files are plain-text documents that give AI coding tools like Claude Code and Cursor the design system context they need to generate interfaces more consistently. In theory, they should help models produce UI that actually reflects the product. In practice, most of them are missing the part that matters most."
"What started as a small curiosity turned into something much more useful: a clearer understanding of why some DESIGN.md files produce strong output and others quietly fall apart. If you haven't come across them yet, DESIGN.md files are plain-text documents that give AI coding tools like Claude Code and Cursor the design system context they need to generate interfaces more consistently."
"The first thing I did was pull apart a range of existing files - both carefully written ones and the scraped collections floating around GitHub. Some were genuinely thoughtful. Others were... less convincing."
DESIGN.md files are plain-text documents that supply AI coding tools with design system context to generate interfaces more consistently. They are intended to help models produce UI that reflects the product. A review of existing DESIGN.md files, including carefully written examples and scraped collections, shows that some files lead to strong output while others fail quietly. The analysis focuses on why certain files work better, and it identifies that many missing elements prevent the models from using the context effectively. Building a DESIGN.md from scratch for a real product and creating a Claude skill to encode the process further clarifies what content matters most.
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