Contract v0.4.3 is live · 44 checks, rescored weekly
Designesy publishes design judgment as a versioned contract, then verifies any live page against it. One grade, with evidence you can cite.
Legitimacy Audit Engine
Enter any public website URL above (no https:// needed). We fetch its CSS, extract design tokens, and evaluate 44 verification checks against the Designesy contract v0.4.3. Real-time. No login required.
- X91.5A
- GitHub Primer90.4A
- Atlassian Design System89.9B
- Lowest 44.9%F
The engine
Every check, run against the page.
Each of the 44 checks inspects a part of the page. A finding pins to the element it flags, named by the check that caught it.
It reads the page you ship
The engine loads the live URL the way a visitor does and walks what actually rendered: markup, tokens, type, spacing, and motion.
It measures instead of guessing
Contrast is computed, never eyeballed. Line length, type scale, and target size are read off the page, each against a threshold the contract publishes.
Each finding pins to its element
A check that fails names itself and marks what it caught. Here v03 finds no focus-visible ring on the button, and v06 measures the muted text at 3.8 to 1.
One grade, with the evidence attached
Findings roll up into one score. Neither finding here carries a score ceiling, so the page grades A, and every result links back to the rule that produced it.
Demo on a generic page. The checks and their thresholds are the engine’s own.
Why it matters
Coherence is how a site earns trust now.
When AI can generate any interface, trust goes to the sites that hold together: consistent type, coherent motion, a steady rhythm. The contract makes that coherence checkable. 44 checks run against the live page, and each one passes or fails in the open.
1 The 42% figure: Belitsoft, State of React Development 2026.
The contract
Nine principles. One contract.
Every check traces back to a principle. Check them off as you read; the full wording lives in the doctrine.
Now live
Four ways to put the contract to work.
Design system contract
The rules behind this site, portable and versioned.
Tokens, motion, components, and the Poise, Takt, Cadence, and Acoustics rules. A human overview, plus a machine export agents can cite directly.
- Version
- v0.4.3
- Principles
- 9
- Checks
- 44
Design Review
Turn taste into inspection. Point your agent at any design.
Eight dimensions, a copyable agent prompt, output format, and verification checklist. Human and machine read the same rules.
Open the kit →Try the Studio
The contract, conversational. Ask about type, motion, or spacing, or score any site.
A conversational instance of the Designesy Director. It answers from the designesy.org contract: tokens, principles, and open tensions.
Open the chat →Continuity
Design judgment that stays current.
Score, contract, verify, and keep the receipt. Open core stays free. Continuity adds history and drift for work that continues.
Join the waitlist →The index
Every surface is public.
System state