kostja94/page-metadata
skills/seo/on-page/metadata/SKILL.md
When the user wants to optimize meta tags other than title, description, Open Graph, or Twitter Cards. Also use when the user mentions "hreflang," "meta robots," "viewport," "charset," "canonical meta," "other meta tags," "meta robots noindex," "meta robots nofollow," "hreflang tags," "viewport meta," or "meta charset." For title tags, use title-tag. For meta descriptions, use meta-description. For Facebook/LinkedIn previews, use open-graph. For X previews, use twitter-cards.
$ install --global
skillsauthnpx skillsauth add kostja94/marketing-skills page-metadataInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 24, 2026, 7:01 PM55.3s1 file scanned
SKILL.md
- name:
- page-metadata
- description:
- When the user wants to optimize meta tags other than title, description, Open Graph, or Twitter Cards. Also use when the user mentions "hreflang," "meta robots," "viewport," "charset," "canonical meta," "other meta tags," "meta robots noindex," "meta robots nofollow," "hreflang tags," "viewport meta," or "meta charset." For title tags, use title-tag. For meta descriptions, use meta-description. For Facebook/LinkedIn previews, use open-graph. For X previews, use twitter-cards.
- version:
- 1.2.0
SEO On-Page: Metadata (Other Meta Tags)
Guides optimization of meta tags beyond title, description, Open Graph, and Twitter Cards. Covers hreflang, robots, viewport, charset, and metadata completeness.
When invoking: On first use, if helpful, open with 1–2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
Scope (On-Page SEO)
- Hreflang: Language/region targeting for multilingual sites
- Meta robots: index/noindex, follow/nofollow (page-level)
- Viewport: Mobile responsiveness
- Charset: Character encoding
- Metadata completeness: All pages have title + meta description (see title-tag, meta-description)
Initial Assessment
Check for project context first: If .claude/project-context.md or .cursor/project-context.md exists, read it for language/locale and indexing goals.
Identify:
- Multi-language: zh, en, x-default if applicable
- Indexing: Full index, noindex for specific pages
- Tech stack: Next.js, HTML, etc.
hreflang (Multi-language)
Three non-negotiables: (1) Self-referencing tags (each page links to itself), (2) Symmetric annotations (every version lists ALL others), (3) Valid ISO 639-1 or language-region codes (en, en-US, zh-CN).
Implementation methods: HTML <link> in head, XML sitemap (xhtml:link), or HTTP headers. For SPAs/JS-rendered pages, use sitemap-based hreflang as backup. See rendering-strategies for SSR/SSG/CSR.
Canonical alignment: Canonical URL must match the same regional version hreflang refers to. Misalignment causes Google to ignore hreflang.
x-default: Fallback for users whose language/location doesn't match any version. Point to default locale or language-selector page.
Next.js (App Router)
export const metadata = {
alternates: {
languages: {
'en-US': '/en/page',
'zh-CN': '/zh/page',
'x-default': '/en/page',
},
},
};
HTML (generic)
<link rel="alternate" hreflang="en" href="https://example.com/en/page" />
<link rel="alternate" hreflang="zh" href="https://example.com/zh/page" />
<link rel="alternate" hreflang="x-default" href="https://example.com/en/page" />
Common Mistakes (Avoid)
- Missing reciprocal references between language versions.
- Canonical tag conflicting with hreflang.
- Relying solely on machine translation without localization (see translation).
- Ignoring mobile—hreflang must appear on both desktop and mobile.
- Forgetting to update hreflang when page structure changes.
Meta Robots (Page-level)
Page-level control for indexing and link following. See indexing for which page types typically need noindex.
| Directive | Effect |
|-----------|--------|
| noindex | Exclude page from search results |
| nofollow | Do not pass link equity through links on the page; does NOT prevent indexing |
| noindex,follow | Exclude from SERP; allow crawlers to follow links (most common for thank-you, signup, legal) |
| noindex,nofollow | Exclude + block link flow (login, staging, test pages) |
Crawl vs index vs link equity: robots.txt = crawl control; noindex = index control; nofollow = link equity only. See robots-txt, indexing.
<meta name="robots" content="noindex, follow">
Next.js: metadata.robots = { index: false, follow: true }. Default is index: true, follow: true.
Viewport
<meta name="viewport" content="width=device-width, initial-scale=1">
Required for mobile-friendly pages; affects Core Web Vitals and mobile search. For full mobile-first indexing and mobile usability requirements, see mobile-friendly.
Charset
<meta charset="UTF-8">
Place in <head>; first child of <head> recommended.
Output Format
- hreflang setup if multi-language
- Meta robots if noindex needed
- Viewport / charset if missing
Related Skills
- title-tag, meta-description: Title and meta description
- open-graph, twitter-cards: Social sharing; link previews
- canonical-tag: Canonical + hreflang for multi-language
- indexing: noindex page-type list; noindex vs nofollow
- robots-txt: Crawl vs index; robots.txt vs noindex
- mobile-friendly: Mobile-first indexing; viewport required
- rendering-strategies: SSR, SSG, CSR; SPAs need sitemap-based hreflang
Related Skills
kostja94/xml-sitemap
testing
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When the user wants to create, audit, or optimize sitemap.xml. Also use when the user mentions "sitemap," "sitemap.xml," "sitemap index," "lastmod," "changefreq," "priority," "URL discovery," "URL discovery for search engines," "single source of truth," "URL config," "unify sitemap IndexNow," or "reduce duplicate maintenance." For IndexNow, use indexnow.
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When the user wants to configure, audit, or optimize robots.txt. Also use when the user mentions "robots.txt," "crawler rules," "block crawlers," "AI crawlers," "GPTBot," "allow/disallow," "disallow path," "crawl directives," "user-agent," "block Googlebot," "fix robots.txt," "robots.txt blocking," or "search engine crawling." For indexing, use indexing.
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588SKILL.mdUpdated Apr 24, 2026
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When the user wants to add or optimize Twitter Card metadata for X (Twitter) link previews. Also use when the user mentions "Twitter Card," "twitter:card," "twitter:image," "twitter:title," "X preview," or "tweet preview." For Facebook/LinkedIn previews, use open-graph.
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