Design System Mixer
Bring a few sites you admire, say what you like about each one, then add your own brand's design.md on top. This assembles a ready-to-paste prompt that has Claude write a new design.md — your brand file always wins, inspiration only fills the gaps it leaves.
Runs entirely in your browser. Files you upload are read locally and never sent anywhere until you paste the prompt yourself.
Your brand
Upload your own design.md — it's the fixed source of truth. Inspiration sites only fill in what it doesn't cover.
Inspiration sites
Upload each site's design.md and describe what you like about it — that description decides what gets borrowed.
No inspiration sites yet — add one to pull in outside ideas, or skip this and generate a brand-only prompt.
Generated prompt
Paste this into a Claude conversation to get your merged design.md back.
If a design.md is long, it's fine to skip pasting its contents here and instead attach the file directly in your Claude conversation — just keep the site's name and your notes so the instructions still line up.
Don't have a DESIGN.md yet? Generate one from any live site with Design MD Extractor.