← OpenAI
Greg Isenberg
Google Design.md + AI Skills: Build Beautiful Apps
4 min read6 May 2026Worth watching
TL;DR
Designer Mang (of Design Code and Aura) explains how to use Google's Design.md — an open-source markdown-based design system file — combined with AI skills and HTML templates to create visually stunning, consistent apps and landing pages without being a professional designer. The workflow solves 'design drift,' where vibe-coded projects start strong but degrade in quality across pages.
Key points
1
Design.md is an open-source markdown file that encodes a design system (typography, colors, spacing, animations like WebGL/3JS) which you attach to AI prompts to maintain visual consistency across all outputs
2
Download both the Design.md AND the HTML template together — the HTML is the finished dish, the Design.md is the recipe; using both gives richer results than either alone
3
Skills are reusable prompt ingredients (e.g. laser effects, skeuomorphic design, 3D globes) that give your designs a unique moat beyond generic purple gradients
4
Design drift — where page 1 looks great but subsequent pages look generic — is the core problem Design.md solves by giving the AI a persistent design memory across all mediums
5
Mang builds 4 products simultaneously using roughly 1,000+ prompts per product, managing multiple sub-agents in tools like OpenClaude and Codex, demonstrating that AI enables one-person holding companies but requires deep workflow mastery
Actionable insights
→
Go to a platform like Aura or Variant, find a design system you like, remix it until satisfied, then download both the Design.md file and the HTML template and attach both to your AI prompt when building any new page or product
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Build a personal library of skills (prompt snippets) for effects like lasers, 3D elements, skeuomorphic buttons — these are your design moat and prevent your output from looking like every other vibe-coded site
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Use iteration (small incremental changes) 90% of the time once you have a design you like, and reserve remix (starting fresh with a new direction) for only 10% of the time — this is how you reach 1,000+ meaningful prompt iterations
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Build a second brain for design inspiration: capture screenshots of real-world and digital designs you admire so you have reference material when prompting AI agents to recreate a specific visual feel
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Do not rely on agents.md for design work — use a per-project Design.md instead, as agents.md is too general and costs more tokens without delivering design-specific consistency
Notable quotes
“AI is not making me lazier. AI is making me work more.”
“Can you guess how many prompts I use to build these products? At least a thousand. Yes. This is how obsessive one can be when it comes to creating.”
“Taste is the real value here — and when I say taste I don't necessarily just mean design taste. Your taste can be like a barista who makes so many cups of coffee every morning and eventually knows exactly how to do it.”
Worth watching?
✅
Worth watching the full video?
Watch if you want to see the live screen-share demo of Mang building with Design.md — the key concepts and workflow steps are all captured here, but the visual examples of finished designs are best seen in motion.
Saved you some time? The creator still deserves a like.
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