Agent skill

roier-seo

Technical SEO auditor and fixer. Runs Lighthouse/PageSpeed audits on websites or local dev servers, analyzes SEO/performance/accessibility scores, and automatically implements fixes for meta tags, structured data, Core Web Vitals, and accessibility issues.

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Install this agent skill to your Project

npx add-skill https://github.com/davila7/claude-code-templates/tree/main/cli-tool/components/skills/web-development/roier-seo

SKILL.md

Roier SEO - Technical SEO Auditor & Fixer

AI-powered SEO optimization skill that audits websites and automatically implements fixes.

When to use this skill

Use Roier SEO when:

  • User asks to "audit my site" or "check SEO"
  • User wants to "improve performance" or "fix SEO issues"
  • User mentions "lighthouse", "pagespeed", or "core web vitals"
  • User wants to add/fix meta tags, structured data, or accessibility
  • User has a local dev server and wants SEO analysis

Key features:

  • Full Audits: Lighthouse audits on any URL (localhost or live)
  • Auto-Fix: Implements fixes directly in the codebase
  • Framework Aware: Detects Next.js, React, Vue, Nuxt, plain HTML
  • Core Web Vitals: Track FCP, LCP, TBT, CLS metrics
  • Structured Data: JSON-LD schemas for rich snippets
  • Accessibility: WCAG compliance fixes

Use alternatives instead:

  • React Best Practices: For general React performance optimization
  • Manual Lighthouse: For one-off audits without auto-fixing

Quick start

Installation

After installing the skill, install the audit dependencies:

bash
cd ~/.claude/skills/roier-seo/scripts
npm install

Running an Audit

For a live website:

bash
node ~/.claude/skills/roier-seo/scripts/audit.js https://example.com

For a local dev server (must be running):

bash
node ~/.claude/skills/roier-seo/scripts/audit.js http://localhost:3000

Output formats:

bash
# JSON output (default, for programmatic use)
node ~/.claude/skills/roier-seo/scripts/audit.js https://example.com

# Human-readable summary
node ~/.claude/skills/roier-seo/scripts/audit.js https://example.com --output=summary

# Save to file
node ~/.claude/skills/roier-seo/scripts/audit.js https://example.com --save=results.json

Audit categories

The audit returns scores (0-100) for five categories:

Category Description Weight
Performance Page load speed, Core Web Vitals High
Accessibility WCAG compliance, screen reader support High
Best Practices Security, modern web standards Medium
SEO Search engine optimization, crawlability High
PWA Progressive Web App compliance Low

Technical SEO fix patterns

Meta tags (HTML Head)

Title tag

html
<!-- Bad -->
<title>Home</title>

<!-- Good -->
<title>Primary Keyword - Secondary Keyword | Brand Name</title>

Rules:

  • 50-60 characters max
  • Include primary keyword near the beginning
  • Unique per page
  • Include brand name at end

Meta description

html
<meta name="description" content="Compelling description with keywords. 150-160 characters that encourages clicks from search results.">

Rules:

  • 150-160 characters
  • Include primary and secondary keywords naturally
  • Compelling call-to-action
  • Unique per page

Essential meta tags

html
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<html lang="en">

Open Graph tags (social sharing)

html
<meta property="og:title" content="Page Title">
<meta property="og:description" content="Page description">
<meta property="og:image" content="https://example.com/image.jpg">
<meta property="og:url" content="https://example.com/page">
<meta property="og:type" content="website">
<meta property="og:site_name" content="Brand Name">

Twitter Card tags

html
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Page Title">
<meta name="twitter:description" content="Page description">
<meta name="twitter:image" content="https://example.com/image.jpg">

Canonical URL

html
<link rel="canonical" href="https://example.com/canonical-page">

Robots meta

html
<!-- Allow indexing (default) -->
<meta name="robots" content="index, follow">

<!-- Prevent indexing (for staging, admin pages) -->
<meta name="robots" content="noindex, nofollow">

Structured data (JSON-LD)

Website schema

html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "WebSite",
  "name": "Site Name",
  "url": "https://example.com",
  "potentialAction": {
    "@type": "SearchAction",
    "target": "https://example.com/search?q={search_term_string}",
    "query-input": "required name=search_term_string"
  }
}
</script>

Organization schema

html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "name": "Company Name",
  "url": "https://example.com",
  "logo": "https://example.com/logo.png",
  "sameAs": [
    "https://twitter.com/company",
    "https://linkedin.com/company/company"
  ]
}
</script>

BreadcrumbList schema

html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [
    {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://example.com"},
    {"@type": "ListItem", "position": 2, "name": "Category", "item": "https://example.com/category"},
    {"@type": "ListItem", "position": 3, "name": "Page"}
  ]
}
</script>

Article schema (for blog posts)

html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "Article Title",
  "author": {"@type": "Person", "name": "Author Name"},
  "datePublished": "2024-01-15",
  "dateModified": "2024-01-20",
  "image": "https://example.com/article-image.jpg",
  "publisher": {
    "@type": "Organization",
    "name": "Publisher Name",
    "logo": {"@type": "ImageObject", "url": "https://example.com/logo.png"}
  }
}
</script>

Performance optimizations

Image optimization

html
<!-- Add width/height to prevent CLS -->
<img src="image.jpg" alt="Description" width="800" height="600">

<!-- Add lazy loading -->
<img src="image.jpg" alt="Description" loading="lazy">

<!-- Use modern formats -->
<picture>
  <source srcset="image.avif" type="image/avif">
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Description">
</picture>

Font optimization

html
<!-- Preload critical fonts -->
<link rel="preload" href="/fonts/main.woff2" as="font" type="font/woff2" crossorigin>
css
@font-face {
  font-family: 'Custom Font';
  src: url('/fonts/custom.woff2') format('woff2');
  font-display: swap;
}

Resource hints

html
<!-- Preconnect to critical third-party origins -->
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://cdn.example.com">

<!-- DNS prefetch for non-critical origins -->
<link rel="dns-prefetch" href="https://analytics.example.com">

<!-- Preload critical resources -->
<link rel="preload" href="/critical.css" as="style">

Accessibility fixes

Alt text

html
<!-- Good (descriptive) -->
<img src="photo.jpg" alt="Team members collaborating in the office">

<!-- Good (decorative) -->
<img src="decoration.jpg" alt="" role="presentation">

Color contrast

  • 4.5:1 contrast ratio for normal text
  • 3:1 contrast ratio for large text (18px+ or 14px+ bold)

Form labels

html
<label for="email">Email Address</label>
<input type="email" id="email" name="email">

Skip link

html
<a href="#main-content" class="skip-link">Skip to main content</a>

<style>
.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 0;
  top: 0;
  z-index: 9999;
  background: #000;
  color: #fff;
  padding: 8px 16px;
}
</style>

Button accessibility

html
<!-- Icon button needs aria-label -->
<button aria-label="Close menu">
  <svg>...</svg>
</button>

Framework-specific patterns

Next.js (App Router)

tsx
// app/layout.tsx
import type { Metadata } from 'next'

export const metadata: Metadata = {
  title: {
    default: 'Site Name',
    template: '%s | Site Name'
  },
  description: 'Site description',
  openGraph: {
    title: 'Site Name',
    description: 'Site description',
    url: 'https://example.com',
    siteName: 'Site Name',
    type: 'website',
  },
}

Next.js (Pages Router)

jsx
import Head from 'next/head';

export default function Page() {
  return (
    <>
      <Head>
        <title>Page Title | Brand</title>
        <meta name="description" content="Page description" />
        <link rel="canonical" href="https://example.com/page" />
      </Head>
      <main>...</main>
    </>
  );
}

React (with react-helmet)

jsx
import { Helmet } from 'react-helmet';

function Page() {
  return (
    <>
      <Helmet>
        <title>Page Title | Brand</title>
        <meta name="description" content="Page description" />
      </Helmet>
      <main>...</main>
    </>
  );
}

Vue.js (with useHead)

vue
<script setup>
useHead({
  title: 'Page Title | Brand',
  meta: [
    { name: 'description', content: 'Page description' }
  ],
  link: [
    { rel: 'canonical', href: 'https://example.com/page' }
  ]
})
</script>

Nuxt.js

vue
<script setup>
useSeoMeta({
  title: 'Page Title | Brand',
  description: 'Page description',
  ogTitle: 'Page Title',
  ogDescription: 'Page description',
  ogImage: 'https://example.com/og-image.jpg'
})
</script>

Workflow

Step 1: Audit

Run the audit script on the target URL:

bash
node ~/.claude/skills/roier-seo/scripts/audit.js <URL>

Step 2: Identify framework

Check package.json dependencies and framework-specific files.

Step 3: Prioritize fixes

  1. Critical (red): Fix immediately
  2. Serious (orange): Fix soon
  3. Moderate (yellow): Fix when possible
  4. Minor (gray): Nice to have

Step 4: Implement

Use the fix patterns above, adapted to the user's framework.

Step 5: Re-audit

Run the audit again to verify improvements.

Requirements

  • Node.js 18+
  • Chrome/Chromium browser (for Lighthouse)
  • Audit script dependencies (installed via npm)

Resources

Version history

v1.0.0 (January 2026)

  • Initial release
  • Lighthouse audit integration
  • 50+ SEO fix patterns
  • Framework support for Next.js, React, Vue, Nuxt

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