Your AI agent writes flawless code. Now teach it taste.
DesignOS is the open-source operating system that gives coding agents design intelligence — 60+ opinionated modules, a self-scoring review engine, and a memory that never forgets a decision.
MIT · markdown-native · works with Claude Code, Cursor & any agent
you › Design a Stripe-level SaaS landing page. designos boot · kernel v1.2 ✓ routed: landing-pages · hero · persuasion ✓ sector: industries/saas.md ✓ memory: brand.md · design.md loaded → design loop: research → wireframe → ui … ▲ review: contrast 4.2:1 on muted text — fixing ✓ re-scored: UI 96 · UX 97 · A11y 96 · Perf 97 ✓ shipped · decisions → memory/design.md
Five layers between a prompt and a shipped screen
Not a prompt pack — an operating system the agent boots into, routing only the modules each task needs.
Opinionated rules, not vibes
Typography scales, spacing grids, 21 component specs, persuasion psychology, motion tokens — every rule with its reason.
foundations/ components/ psychology/ motion/ patterns/ native/Process that catches what talent misses
Research → wireframe → UI → review → accessibility → performance → SEO → refactor. No stage skipped, ever.
loops/ workflows/ checklists/An adversarial critic with veto power
Six dimensions, hard 95 threshold, instant-fail caps for contrast and fake data. Under 95 goes back — before you ever see it.
scoring/ validators/ evals/Decision #40 agrees with decision #4
Seven files per project — brand, design, pages, todos, bugs. Every choice recorded with its reason, forever.
memory/Fintech isn't gaming isn't healthcare
24 sector playbooks: buyer psychology, visual language, trust requirements, and what each industry instantly punishes.
industries/Nine specialists, one veto
Creative director, UX researcher, a11y specialist, copywriter, reviewer — real Claude Code subagents, one flag away.
agents/Nothing ships on vibes
Every deliverable is graded across six dimensions against a written rubric. Accessibility failures cap the score at 60 — no exceptions, no negotiation. Under threshold, the work returns to the loop with specific objections.
Four pages, one token system, zero hand-tuning
A complete fictional product designed by the system — view source on any of them: every value resolves to a token, every decision traces to a module.
One command. Any agent.
$ npx github:ardamoustafa1/DesignOS init --agents ✓ DesignOS copied to ./DesignOS ✓ CLAUDE.md wired ✓ 9 subagents registered
Then ask for anything — "design a pricing page for a fintech app, dark theme" — and watch it route modules, run the loop, and refuse to hand you anything under 95.
Make your agent dangerous
Star DesignOS on GitHub150+ files · 8,600+ lines of design judgment · yours