Hreflang and International SEO
AgriciDaniel/claude-seo
Audits, validates and generates hreflang tags for multi-language and multi-region sites in HTML, HTTP headers or XML sitemaps, flagging common code and return-tag mistakes.
A skill your agent uses when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites.
Install Hreflang
$ npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist hreflang --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/hreflang .claude/skills/hreflang && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "hreflang" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflang into .claude/skills/hreflang/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hreflang", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflangType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist hreflang --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/hreflang .agents/skills/hreflang && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "hreflang" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflang into .agents/skills/hreflang/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hreflang", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist hreflang --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/hreflang .cursor/skills/hreflang && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "hreflang" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflang into .cursor/skills/hreflang/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hreflang", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/hreflang--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist hreflang --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/hreflang .gemini/skills/hreflang && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "hreflang" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflang into .gemini/skills/hreflang/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hreflang", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist hreflangInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/hreflang .github/skills/hreflang && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "hreflang" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflang into .github/skills/hreflang/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hreflang", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist hreflang --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/hreflang .opencode/skills/hreflang && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "hreflang" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/hreflang into .opencode/skills/hreflang/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hreflang", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
hreflang- GitHub stars
- 74k
- Token cost
- ~430 tokens
- SKILL.md length
- 169 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites.
- Auditing metadata
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Structured data
What it does
Hreflang is an agent skill from thedaviddias/Front-End-Checklist. Use when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites. Verify the rendered HTML and HTTP response rather than relying only on source files.
Its SKILL.md is about 430 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
It sits in Marketing & SEO, covering Technical SEO. The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Auditing metadata
- Structured data
- Indexability related to Add hreflang tags for multilingual sites
Example prompts
- “/hreflang”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
frontendchecklist.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Hreflang loads about 430 tokens when it runs, and up to ~1.7k if it reads all its reference files. Until then it costs about 55 tokens; SKILL.md has 169 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 169 words, ~430 tokens.
Download SKILL.mdSave it as
.claude/skills/hreflang/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- hreflang
- description
- Use when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites. Verify the rendered HTML and HTTP response rather than relying only on source files.
- metadata.category
- i18n
- metadata.priority
- medium
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 20
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/i18n/hreflang
Add hreflang tags for multilingual sites
Without hreflang, users searching in French might see your English page—proper implementation ensures the right language version appears in search results for each region.
Quick Reference
- hreflang tells search engines which language version to show users
- Always include x-default for fallback/language selector pages
- Must be reciprocal—all pages must link to all variations
- Use ISO 639-1 language codes and ISO 3166-1 Alpha-2 regions
Check
Check if this multilingual website properly implements hreflang tags for language and regional targeting.
Fix
Add appropriate hreflang tags to indicate language and regional variations of this page.
Explain
Explain how hreflang tags help search engines serve the correct language version to users in different regions.
Code Review
Review metadata generation, rendered HTML, structured data, and response headers related to Add hreflang tags for multilingual sites. Flag exact routes or templates where search-facing output violates the rule, and describe how to verify the final page output.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/hreflang of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Hreflang next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Hreflang this skillthedaviddias/Front-End-Checklist | 74k | — | ~430 | Automated safety check: Pass | MIT | |
| Hreflang and International SEOAgriciDaniel/claude-seo | 19k | 5 repos | ~3.4k | Automated safety check: Pass | MIT | |
| Google SEO APIsAgriciDaniel/claude-seo | 19k | 1 repos | ~4.2k | Automated safety check: Pass | MIT | |
| GEO-First SEO Audit Toolzubair-trabzada/geo-seo-claude | 11k | — | ~2.8k | Automated safety check: Notes | MIT | |
| SEO Optimizerailabs-393/ai-labs-claude-skills | 455 | 1 repos | ~3.2k | Automated safety check: Pass | MIT | |
| SEO Drift MonitorAgriciDaniel/claude-seo | 19k | 1 repos | ~1.9k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Hreflang
What does Hreflang do?
A skill your agent uses when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites. Hreflang is an agent skill from thedaviddias/Front-End-Checklist. Use when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites.
When should I use Hreflang?
Hreflang fits situations like: auditing metadata; structured data; indexability related to Add hreflang tags for multilingual sites.
How do I install Hreflang in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a claude-code`. Or copy the skill folder (skills/hreflang in thedaviddias/Front-End-Checklist) into .claude/skills/hreflang in your project. Claude Code loads it when a task matches its description.
How do I install Hreflang in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a codex`. Or copy the skill folder (skills/hreflang in thedaviddias/Front-End-Checklist) into .agents/skills/hreflang in your project. Codex loads it when a task matches its description.
Can I use Hreflang in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill hreflang -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hreflang, .gemini/skills/hreflang, .github/skills/hreflang and .opencode/skills/hreflang in your project.
What does Hreflang need to run?
SKILL.md names no scripts, command-line tools or credentials: Hreflang is instructions for the agent only.
Does Hreflang access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is Hreflang safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Hreflang use?
Hreflang is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Hreflang use?
About 430 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.3k tokens, read only when the agent opens those files.
What are the alternatives to Hreflang?
Skills that share tags, products or a category with Hreflang: Hreflang and International SEO (AgriciDaniel/claude-seo, 19k stars), Google SEO APIs (AgriciDaniel/claude-seo, 19k stars), GEO-First SEO Audit Tool (zubair-trabzada/geo-seo-claude, 11k stars) and SEO Optimizer (ailabs-393/ai-labs-claude-skills, 455 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hreflang?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,421 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.