Seo hreflang

Skill fusengine/agents/plugins/seo/skills/seo-hreflang

Redefining development through cognitive automation and collaborative agent systems.

Install

npx -y skills add fusengine/agents --skill seo-hreflang

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

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What its author says it does

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Use when auditing or generating hreflang for i18n SEO. Covers HTML link tags, HTTP headers, XML sitemap hreflang, self-referencing, return tags, x-default, ISO 639-1 + ISO 3166-1 code validation.

SKILL.md

1.3 KB, as published. Nobody here has run it

Hreflang / i18n SEO

Workflow

Detect hreflang tags (HTML <link>, HTTP header, or XML sitemap)
Run scripts/parse-hreflang.ts → validate
Check self-referencing, return tags, x-default
Verify language/region codes (ISO 639-1 + ISO 3166-1)

Common Mistakes

❌ Missing self-reference (<link rel="alternate" hreflang="fr" href="/fr/"> from /fr/)
❌ Missing return tags (A → B but not B → A)
❌ Invalid codes (en-UK instead of en-GB)
❌ HTTP/HTTPS mismatch between alternates
❌ Mixing trailing slashes

Implementation Options

HTML head: <link rel="alternate" hreflang="fr-FR" href="https://example.com/fr/">
HTTP Header: Link: <https://example.com/fr/>; rel="alternate"; hreflang="fr-FR"
XML Sitemap: <xhtml:link rel="alternate" hreflang="fr-FR" href="https://example.com/fr/"/>

x-default

Required for international landing/locale selector pages:

<link rel="alternate" hreflang="x-default" href="https://example.com/">