Design Contract + QA for AI-built apps

Your design system, enforced on every AI commit.

Your AI writes the code. UIHub makes sure it still looks like your product — hardcoded colors, off-grid spacing and token drift, caught file by file. Then it hands your agents a contract they can't forget.

No sign-up for your first scan. No repo yet? Create a design system from scratch →

Plugs intoClaude DesktopChatGPTGitHubCodex

100compliance with a contract16/16 tasks, every one clean

68.44without one — and fallingsame agent, same tasks

0false positivesif it says drift, it's real

100%repeatable scanssame repo, same result, every time

* From our own benchmark: the same agent, 16 sequential tasks, with and without a UIHub contract. Zero false positives on our rule test suite; scans are fully repeatable.

Three steps between "it works" and "it's on-brand"

1
Paste a repo
Any public GitHub link — no sign-up needed for your first scan.
2
See the drift
Hardcoded colors, off-grid spacing, token drift — every finding with the file, the line, and the exact fix.
3
Ship the contract
Download AGENTS.md, DESIGN.md and tokens.md. Your AI tools follow it. UIHub verifies it.

Without a contract, your AI slowly forgets your design.

We ran the same agent through 16 tasks — with and without a UIHub contract. The contract isn't advice. It's a promise your agent can't drift from.

With a UIHub contract — 100 every task Without — avg 68.44, falling

Real data: the same agent, 16 sequential tasks, with and without a contract. Task 11's dip is a truncated reply — shown, not hidden.

Every finding points at a line.

Design Drift Report

project: demo-app · 5 files · 4 rules · 4 errors · 1 warning

src/Button.tsx
L4 · Hardcoded color #6D5DFC; use a theme token
src/IconButton.tsx
L5 · Hardcoded color #17171C in inline style; use a theme token
src/Screen.tsx
L4 · Arbitrary spacing 13px is off the 4px grid; use a spacing token

Compliance: 78% — drift found, contract ready

Scan your repo →

Why UIHub

Findings you can act on

Every finding names the file, the line, and the fix. If the scanner flags it, you can act on it immediately.

Works with Claude, ChatGPT & your CLI tools

Claude Desktop and ChatGPT connect with a one-time browser sign-in; CLI tools (Claude Code, Codex, Cursor, Zed) use an API key. Same rules for every agent — no lock-in, no new format.

Start from anywhere

Scan any repo — private ones too, once you connect GitHub. Import a token file, measure a site you admire, or chat your way to a design system.

Precision over noise

If the scanner says drift, it shows the exact line. No vague warnings you can't act on.

Re-scan. Always.

Agents drift task by task. Run the scan after every session and watch compliance instead of guessing.

Free to start

One scan a day, free. Pro when you ship — unlimited scans, contracts, and history.

Plans

Start free. Upgrade when you ship — unlimited scans, contracts and history. Yearly billing saves two months.

Free

Try the audit on your own repo.

· 1 repo scan per day
· 1 design contract per day
· Contract export (AGENTS.md, DESIGN.md, tokens.md)
· Community models

Start free

Pro

$9/mo

For developers shipping AI-built UIs.

· Unlimited scans and contracts
· Pro analysis model
· Contract history
· MCP server (local CLI + remote API)
· Private repo scanning (connect GitHub)
· Priority support

or $90/yr — two months free

Choose Pro

Enterprise — coming soon. Teams with shared design systems, higher limits and setup support.

Taxes are calculated at checkout. Cancel anytime — access stays until the end of your billing period.

Stop re-teaching your design to every AI tool.

One contract. Every agent on-brand. Scan free, today.

Free: 1 scan a day · Pro: unlimited scans + contract history. Sign in to save your work.