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 fernando-bertholdo/4-successful-AI-life --skill web-standardsgit clone --depth 1 https://github.com/fernando-bertholdo/4-successful-AI-lifeWrote 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/fernando-bertholdo/4-successful-ai-life/web-standards)<a href="https://agentmods.dev/skills/fernando-bertholdo/4-successful-ai-life/web-standards"><img src="https://agentmods.dev/badge/skills/fernando-bertholdo/4-successful-ai-life/web-standards/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/fernando-bertholdo/4-successful-ai-life/web-standards"><img src="https://agentmods.dev/badge/skills/fernando-bertholdo/4-successful-ai-life/web-standards.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00043 | $0.08727 |
| Opus 5.5 | $0.00017 | $0.03491 |
| Sonnet 5.5 | $0.00009 | $0.01745 |
| Haiku 4.5 | $0.00004 | $0.00873 |
Grade A, and why
web-standards 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 1mo 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 — 1,196 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UI Web Standards
Overview
Comprehensive guidance for building accessible, performant, and user-friendly web interfaces aligned with Vercel's Web Interface Guidelines. Covers accessibility compliance (WCAG 2.1 AA), component patterns, form handling, animations, typography, navigation, and anti-patterns to avoid.
When to Use
- Reviewing HTML, React, Vue, Svelte components for accessibility and standards compliance
- Building forms, buttons, links, modals, navigation, lists, and interactive elements
- Optimizing performance via virtualization, lazy loading, and animation handling
- Implementing animations, transitions, or motion-sensitive designs
- Handling dark mode, i18n, localization, or theme-aware components
- Debugging focus states, keyboard navigation, or screen reader announcements
- Designing UX copy, error messages, loading states, or empty states
When NOT to Use
- Styling decisions unrelated to accessibility, performance, or UX patterns
- Branding or visual design guidelines (use design system skill instead)
- Backend logic or server-side rendering patterns (use architecture reviews)
- Non-web platforms (native mobile, desktop apps, terminal UIs)
Accessibility
Semantic HTML First
Use semantic elements; never <div onClick> for interactive content:
<button>for actions (submit, cancel, toggle, delete)<a>or<Link>for navigation (internal/external)<label>for form controls (inputs, checkboxes, radios, selects)<table>for tabular data (with<thead>,<tbody>, proper headers)<nav>,<main>,<header>,<footer>,<section>,<article>for structure
Anti-pattern:
<div onClick={handleClick} role="button">
Click me
</div>
Correct:
<button onClick={handleClick}>
Click me
</button>
ARIA Labels & Roles
- Icon-only buttons require
aria-label="..."describing intent - Form controls without visible labels require
aria-labeloraria-labelledby - Inputs with labels: use
<label htmlFor="id">(clickable target) oraria-label - Interactive elements: expose role via semantic HTML; use
role="..."only when semantic element unavailable - Decorative icons: apply
aria-hidden="true"to skip in accessibility tree - Dynamic content: async updates use
aria-live="polite"(toasts, validation messages, status updates) - Skip links: include skip-to-main link at top of page
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.
- 1mo ago First seen · 1,196 lines · 43 tokens per session scan A f49abf87113f
web-standards is a skill published in the GitHub repository fernando-bertholdo/4-successful-AI-life (2 stars, last pushed 10d ago), licensed MIT. It adds 43 tokens to every session and 8,727 once invoked, about $0.0002 per session on Opus 5.5. 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.
Other skills, from other repositories
frontend-enhancer
Enhance the visual design of web apps: modern UI components, layout, responsive design, color palettes, animations. Use for styling and UI polish; pair with ui-research first for new design directions.
generic-design-system
Complete design system reference for any project - colors, typography, spacing, components, animations. Adapts to project theme and tech stack. Use when implementing UI, choosing colors, creating animations, or ensuring brand consistency. For new design systems, use ui-research skill first.
generic-react-design-system
Complete design system reference for React applications. Covers colors, typography, spacing, component patterns, glassmorphism effects, GPU-accelerated animations, and WCAG AA accessibility. Use when implementing UI, choosing colors, applying spacing, creating components, or ensuring brand consistency.
generic-static-design-system
Complete design system reference for static HTML/CSS/JS sites. Covers colors, typography, component patterns, animations, and accessibility. Use when implementing UI, choosing colors, or ensuring brand consistency.
generic-static-ux-designer
Professional UI/UX design expertise for static HTML/CSS/JS sites. Covers design thinking, user psychology, visual hierarchy, minimalist interaction patterns, accessibility, and performance-driven design. Use when designing features, improving UX, or conducting design reviews.
color-ops
Color for developers: color spaces, accessibility contrast, palette generation, CSS color functions, design tokens, dark mode. Triggers on: color, palette, contrast, WCAG, APCA, OKLCH, color-mix, dark mode colors, design tokens, CVD, color blind, P3, sRGB.