Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add flitzrrr/frontend-design-skills --skill ui-patternsgit clone --depth 1 https://github.com/flitzrrr/frontend-design-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/flitzrrr/frontend-design-skills/ui-patterns)<a href="https://agentmods.dev/skills/flitzrrr/frontend-design-skills/ui-patterns"><img src="https://agentmods.dev/badge/skills/flitzrrr/frontend-design-skills/ui-patterns.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00057 | $0.01524 |
| Opus 5 | $0.00028 | $0.00762 |
| Sonnet 5 | $0.00011 | $0.00305 |
| Haiku 4.5 | $0.00006 | $0.00152 |
Grade A, and why
ui-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UI-Patterns
Proven interaction patterns from shipped products. No theory -- real patterns from award-winning sites and successful products.
Scope
Use this skill when:
- You are designing concrete UI elements (hero, navigation, cards, forms, footer)
- You are structuring landing pages and need conversion-relevant patterns
- You are designing pricing tables, testimonials, or CTAs
- You want to ensure your patterns meet established standards
Principles
1. Patterns Follow Expectations
Users have mental models. A hamburger menu opens navigation; a cart icon leads to checkout. Only break expectations with clear added value.
2. Progressive Disclosure
Show only what is relevant in the current context. Reveal details on interaction, not all at once.
3. One Primary CTA per Viewport
Each visible area has exactly one primary action. Everything else is secondary or tertiary.
4. Consistency over Creativity
Within a product, identical actions must look identical. Creative variation between products, consistency within.
5. Mobile-First is Mandatory
Patterns must work at 375px before they are extended to 1440px.
Rules
Hero Sections
- DO: Choose one of the three proven hero variants:
- Statement Hero: Large headline + subline + CTA. No image. For SaaS/tech.
- Split Hero: Text left, visual right. For products with visual explanation.
- Immersive Hero: Full-screen image/video with overlay text. For brands/portfolios.
- DO: Keep the CTA visible above the fold.
- DO: Clear visual hierarchy: headline > subline > CTA > secondary elements.
- DON'T: Sliders/carousels in the hero. Demonstrably low engagement rates.
- DON'T: More than 15 words in the hero headline.
- DON'T: Auto-play video with sound.
Navigation
- DO: Choose a proven navigation pattern:
- Sticky Top Bar: Logo left, links center/right, CTA right. Standard for SaaS.
- Hamburger Overlay: Full-screen navigation behind hamburger icon. For creative sites.
- Minimal Header: Logo + hamburger only. For immersive experiences.
- DO: Auto-hide on scroll down, reveal on scroll up.
- DO: Visually mark the active page in the navigation.
- DON'T: More than 7 main navigation items.
- DON'T: Mega menus on mobile. Use accordions instead.
- DON'T: Navigation without a skip link for keyboard users.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 136 lines · 57 tokens per session scan A 8fece3317f3d
ui-patterns is a skill published in the GitHub repository flitzrrr/frontend-design-skills (5 stars, last pushed 5mo ago), licensed MIT. It adds 57 tokens to every session and 1,524 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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