proof — a product design skill for Claude Code and Codex
A product design skill with best practices built in.
Proof designs your product's website pages, from landing to pricing to blog. Every pattern comes from 400+ real product pages, studied through Mobbin. The first draft looks shipped; you adjust it in minutes.
Most tools style a page. Proof designs it.
Most tools stop at the surface. Proof also decides what goes on the page and in what order, learned from 400+ shipped pages the market has already tested.
- SurfaceStyle, texture, and motion
- SkeletonThe layout inside each section
- StructureThe order of sections and their rhythm
- ScopeWhich sections to include, and which to leave out
- StrategyWho the page is for, read from your brief and matched to pages that already work
The Elements of User Experience · Jesse James Garrett
Three steps. Then design any page.
Install once. Then name a page, a style, and a theme. Works in Claude Code and Codex.
/plugin marketplace add senlindesign/proof/plugin install proof@proof/proof:proof landing business darknpx skills add senlindesign/proof/proof landing business darkgit clone https://github.com/senlindesign/proof.gitcp -R proof/skills/proof ~/.claude/skills//proof landing business darkgit clone https://github.com/senlindesign/proof.gitcp -R proof/skills/proof ~/.codex/skills/Use the proof skill: landing page, business style, darkOne brief. Four pages that feel nothing alike.
One request, a shared inbox called Relay, in four styles. Each has its own hero, layout, and texture, not just its own colors.
Every card opens the full page, live. Scroll it, hover, click around.
From a one-line brief to full control.
All eight page types, in every style, light and dark. Give one sentence, or set the sections, brand color, and font yourself.
Need one section? Ask for just that.
Ten section types, cut from the pages above. Each can be made on its own, for example /proof faq business.
Ship the first draft.
Free, open source, and ready in your agent in under a minute.