GoodAiUX ships Convergence — a conversion-first, accessibility-first design system in a single DESIGN.md file. Drop it into Claude, Cursor, ChatGPT or v0 and your AI starts following 10 design principles and 100+ rules — every one traceable to a primary source like Baymard Institute, Nielsen Norman Group, WCAG 2.2, Apple HIG, or Material Design 3.
Models are trained on Dribbble and Tailwind demos. They default to whatever looks "modern" — ghost buttons, hidden filters, hamburger menus on desktop, "Submit" CTAs. Every one of those choices has lost an A/B test.
No SaaS, no login, no Figma plugin. Just one Markdown file your AI reads alongside your prompt.
One-time $5 via Stripe. The file lands in your inbox — yours to keep, no expiry, no login.
Put DESIGN.md in your repo root, your Claude Project, your Cursor rules, or paste it into the system prompt. Your AI finds it automatically.
Every screen your AI generates now follows the GoodAiUX rules: filled CTAs, sticky mobile bar, top-aligned labels, visible prices, repeated CTA at footer.
10 design principles plus 100+ rules — each one traceable to peer-reviewed research, large-scale usability benchmarks, or official platform guidelines. No mystery, no folklore.
+ 20 more sources cited across the full bibliography: Stripe, Wroblewski, Cialdini, Thaler & Sunstein, Web Almanac (Performance), HBR, Bringhurst — every rule traceable to peer-reviewed research or official platform guidelines.
| $200 Figma kits | $500 CRO courses | Generic AI prompt | GoodAiUX — $5 | |
|---|---|---|---|---|
| Your AI actually uses it | ✕ | ✕ | ~ | ✓ Native .md format |
| Cites primary sources per rule | ✕ | Some | ✕ | ✓ 30+ sources, fully cited |
| Accessibility-first (WCAG 2.2 AA) | Partial | Sometimes | ✕ | ✓ Verified contrast pairs |
| No subscription or lock-in | ~ | ~ | ✓ | ✓ One file you keep |
| Works across Claude, Cursor, v0, GPT | ✕ | ✕ | ✓ | ✓ |
| Time to first shipped screen | ~ days | ~ weeks | ~ hours | ✓ ~ 60 seconds |
| Price | $199–499 one-time | $299–999 one-time | $0 (but generic) | $5 one-time |
GoodAiUX is new, so we don't fake reviews or customer logos. Instead, every claim in the file is checkable against its primary source.
Every rule is traceable. Each of the 10 principles and 100+ rules cites a primary source — Baymard, NN/g, WCAG 2.2, Apple HIG, Material 3, Krug, Spool, Hoober, Penzo. Open the citation and check it yourself.
Accessibility is verified, not asserted. Colour pairs are contrast-checked to WCAG 2.1/2.2 AA (4.5:1 body, 3:1 large text & UI). The file states the exact ratios so you can audit every one.
One file, no lock-in. 748 lines of Markdown that work with Claude, Cursor, v0, ChatGPT and Windsurf. No SaaS, no login, no expiry — and a 14-day delivery guarantee.
One file, DESIGN.md — 748 lines, 48 KB. Front matter holds the design tokens (colors with verified contrast pairings, typography, spacing, radii, components) in YAML. The body lays out 10 design principles and 100+ rules — every one citing a primary source you can verify yourself.
The system inside is called Convergence: conversion-first and accessibility-first (WCAG 2.2 AA throughout). It's a one-time $5 purchase — you download the file, drop it into your AI tool, and that's it.
Three options:
1. Drop it in your repo root. Claude Code, Cursor, Aider, and Copilot will read it automatically when you ask for UI work.
2. Paste it as a Claude Project or ChatGPT custom instruction.
3. Reference it in your v0 / Bolt prompt: "Follow the rules in this file: [paste contents]."
The full bibliography is included at the bottom of the file. Highlights:
Empirical research: Baymard Institute (Checkout Usability, Mobile Forms, E-Commerce Search benchmarks), Web Almanac 2024 (Accessibility & Performance), Stripe checkout strategies.
Usability heuristics: Nielsen Norman Group (10 Heuristics, F-Pattern 2006 & 2017, Error Messages, Trustworthiness, Icon Usability), Steve Krug (Don't Make Me Think).
Forms & labels: Penzo 2006 eyetracking, Wroblewski label-alignment research, Caroline Jarrett (Forms That Work, 2009), Adam Silver · GOV.UK GDS one-thing-per-page.
Mobile UX: Hoober 2013 (thumb zone, n=1,333), Wroblewski (Mobile First), Smashing 2016 thumb-zone synthesis.
Standards: WCAG 2.1 / 2.2 (W3C), Apple Human Interface Guidelines, Google Material Design 3.
Behavioural economics & CRO: Iyengar & Lepper 2000, Scheibehenne 2010, Thaler & Sunstein (Nudge), Cialdini (Influence), Spool's $300M Button, HBR experimentation research.
Yes for all four. The rules split cleanly: e-commerce (sticky CTA, badges, price prominence, delivery dates, Baymard checkout patterns), SaaS / landing (Hick's Law-bounded plan counts, testimonials with citations, hero CTA discipline), funnel / signup (Spool's guest-checkout pattern, progress steps, Jarrett's optional-field marking), mobile (48px touch targets, thumb-zone CTAs, sticky bottom bar). Every page-type has its own section in the file.
No catch. At $5 it's an obvious yes for anyone building with AI, and we'd rather have ten thousand customers giving us feedback than a hundred paying $500. Price may rise as the file matures.
10 design principles. 100+ rules. 30+ primary sources cited. WCAG 2.2 AA throughout. One Markdown file. Instant download.