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+---
+name: openmarketui-design
+description: >
+  Design system for OpenMarketUI - Signet AI's algorithmic trading toolkit. Use when building or designing any OpenMarketUI assets: landing pages, marketing materials, brand identities, UI components, documentation. This skill captures the refined, monochromatic aesthetic with extreme restraint. Key principles: opulence through minimalism, technical sophistication without arrogance, craft over speed. When in doubt, ask "what would Nicholai do?"
+---
+
+# OpenMarketUI Design System
+
+A Signet AI company. Building the safest algorithmic trading toolkit with guardrails and intelligence.
+
+## The Core Principle
+
+**Taste requires restraint.**
+
+When designing, strip back until it feels almost too simple - until it borders on bland. Then refine. The confidence is in what's NOT there.
+
+## Visual Language
+
+### Palette
+- **Monochromatic only** - black ink on pure white
+- No colors. No gradients. No exceptions.
+- High contrast, crisp edges
+
+### Typography
+- Clean sans-serif (Inter, IBM Plex, system fonts)
+- Hierarchy through weight, not font changes
+- Bold for primary, light for secondary
+- Generous letter-spacing for refinement
+
+### Texture
+- Dot matrix / halftone patterns for data aesthetic
+- Dense dots = depth and sophistication
+- Patterns should whisper, not shout
+- Code snippets as texture, not decoration
+
+### Space
+- Massive white space - this is the opulence
+- If you're unsure whether to add something, don't
+- Negative space IS the design
+
+### Composition
+- Centered, balanced, symmetrical
+- One focal point maximum
+- The eye should rest, not hunt
+
+## What Success Looks Like
+
+See reference images in `assets/`:
+- **Weiden Haus** - dot matrix logos, brutalist simplicity
+- **OpenAI Research** - white space, clean type, subtle branding
+- **brand-kit-v3.png** - our direction: wordmark, restraint, whisper
+
+The work should feel:
+- Quietly confident
+- Intellectually opulent
+- Smarter than everyone else, but not proving it
+- Like a whisper in a room full of shouts
+
+## Writing Style
+
+Clear, direct, technical but accessible. From our announcement copy:
+
+> "Today, we're releasing a research preview of GPT-5.3-Codex-Spark, a smaller version of GPT-5.3-Codex, and our first model designed for real-time coding. Codex-Spark marks the first milestone in our partnership with Cerebras. Codex-Spark is optimized to feel near-instant when served on ultra-low latency hardware—delivering more than 1000 tokens per second while remaining highly capable for real-world coding tasks."
+
+Key characteristics:
+- No marketing fluff
+- Technical precision
+- Specifics over superlatives
+- Let the work speak
+
+## Anti-Patterns
+
+Avoid:
+- Color accents (we don't do color)
+- Decorative elements (every pixel must earn its place)
+- Loud typography (whisper, don't shout)
+- Proving intelligence (if you're smart, it shows)
+- Speed over craft (take the time to do it right)
+
+## The Question
+
+When stuck, ask: **"What would Nicholai do?"**
+
+Not because he's the arbiter of taste, but because he takes pride in craft over speed. The answer is usually: less. Strip it back. Trust the work.
+
+## Brand Lineage
+
+OpenMarketUI is a Signet AI company. This matters. The design should feel like it belongs to a family of thoughtful, precise, premium tools.
+
+## Assets
+
+- `assets/brand-kit-v3.png` - primary brand reference
+- `assets/reference-*.jpg` - aesthetic inspirations (Weiden Haus, OpenAI)
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