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seo-hreflang SKILL.md skillA

seo-hreflang from hashgraph-online/awesome-codex-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add hashgraph-online/awesome-codex-plugins/seo-hreflang@v1.7.0

Pins v1.7.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: hashgraph-online/awesome-codex-plugins
Path: plugins/BestLemoon/codex-seo/skills/seo-hreflang/SKILL.md
Versions recorded: 1
Latest version: v1.7.0, committed Apr 3, 2026
Size: 8,672 bytes
Repository stars: 1,501
License: Apache-2.0

Hreflang and international SEO audit, validation, and generation. Detects common mistakes, validates language/region codes, and generates correct hreflang implementations. Use when user says "hreflang", "i18n SEO", "international SEO", "multi-language", "multi-region", or "language tags".

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Hreflang & International SEO

Validate existing hreflang implementations or generate correct hreflang tags
for multi-language and multi-region sites. Supports HTML, HTTP header, and
XML sitemap implementations.

## Validation Checks

### 1. Self-Referencing Tags
- Every page must include an hreflang tag pointing to itself
- The self-referencing URL must exactly match the page's canonical URL
- Missing self-referencing tags cause Google to ignore the entire hreflang set

### 2. Return Tags
- If page A links to page B with hreflang, page B must link back to page A
- Every hreflang relationship must be bidirectional (A→B and B→A)
- Missing return tags invalidate the hreflang signal for both pages
- Check all language versions reference each other (full mesh)

### 3. x-default Tag
- Required: designates the fallback page for unmatched languages/regions
- Typically points to the language selector page or English version
- Only one x-default per set of alternates
- Must also have return tags from all other language versions

### 4. Language Code Validation
- Must use ISO 639-1 two-letter codes (e.g., `en`, `fr`, `de`, `ja`)
- Common errors:
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add hashgraph-online/awesome-codex-plugins/seo-hreflang@sha256:eab248b9c5065150

The line at the top of this page pins the label v1.7.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_rmpqjoqw752sxqrh.svg)](https://markdownregistry.com/a/art_rmpqjoqw752sxqrh)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Apr 3, 2026.

version	committed	commit	size	audit
v1.7.0 latest	2026-04-03	80062a5	8,672 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (8672 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

hashgraph-online/awesome-codex-plugins · 1,501 stars · license Apache-2.0 · pushed 2026-11-03 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rmpqjoqw752sxqrh
GET https://markdownregistry.com/api/v1/resolve?ref=hashgraph-online/awesome-codex-plugins/seo-hreflang
GET https://markdownregistry.com/api/v1/blob/eab248b9c50651507e0ae9090cfe7593b8c99fd2878346150e45da261aaf04cd

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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