Sumi
Open-source design tool · GitHub · 2026
Design taste for people building with AI.
AI can write an interface in a minute and they all look the same. Sumi is the lab’s answer: a design brain you install into Claude Code that scores the work and tells you what to fix.
What the lab did
Four jobs.
- 01
Infrastructure
A Claude Code plugin: 43 skills, 168 references and 37 commands. - 02
R&D
Built from the design canon and tested on our own builds. Every recommendation carries a citation. - 03
User experience
Start with one command. It scores the work out of 100 and names the first thing to fix. - 04
Distribution
Open source under Apache 2.0, on GitHub and the plugin marketplace.
What it moved
People, culture, money.
-
Social
Free for anyone building with AI.
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Cultural
Pushes back on the same-looking AI interface.
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Economic
A solo builder gets a senior design review without hiring one.