Geo Fundamentals
wasp-lang/wasp
Generative Engine Optimization for AI search engines (ChatGPT, Claude, Perplexity).
Find broken links on websites. An agent skill from guia-matthieu/clawfu-skills.
Install Link Checker
$ npx skills add guia-matthieu/clawfu-skills --skill link-checker -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install guia-matthieu/clawfu-skills link-checker --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/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/seo-tools/link-checker .claude/skills/link-checker && 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 "link-checker" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checker into .claude/skills/link-checker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "link-checker", 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/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checkerType 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 guia-matthieu/clawfu-skills --skill link-checker -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install guia-matthieu/clawfu-skills link-checker --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/seo-tools/link-checker .agents/skills/link-checker && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "link-checker" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checker into .agents/skills/link-checker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "link-checker", 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 guia-matthieu/clawfu-skills --skill link-checker -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install guia-matthieu/clawfu-skills link-checker --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/seo-tools/link-checker .cursor/skills/link-checker && 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 "link-checker" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checker into .cursor/skills/link-checker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "link-checker", 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/guia-matthieu/clawfu-skills.git --path skills/seo-tools/link-checker--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 guia-matthieu/clawfu-skills --skill link-checker -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install guia-matthieu/clawfu-skills link-checker --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/seo-tools/link-checker .gemini/skills/link-checker && 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 "link-checker" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checker into .gemini/skills/link-checker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "link-checker", 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 guia-matthieu/clawfu-skills link-checkerInstalls 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 guia-matthieu/clawfu-skills --skill link-checker -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/seo-tools/link-checker .github/skills/link-checker && 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 "link-checker" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checker into .github/skills/link-checker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "link-checker", 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 guia-matthieu/clawfu-skills --skill link-checker -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install guia-matthieu/clawfu-skills link-checker --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/guia-matthieu/clawfu-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/seo-tools/link-checker .opencode/skills/link-checker && 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 "link-checker" agent skill from https://github.com/guia-matthieu/clawfu-skills/tree/main/skills/seo-tools/link-checker into .opencode/skills/link-checker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "link-checker", 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
link-checker- GitHub stars
- 150
- Token cost
- ~375 tokens
- SKILL.md length
- 99 words
- Files
- 3 (incl. scripts)
- Skills in repo
- 31
- Repo updated
- First seen
- Licence
- MIT
At a glance
Find broken links on websites. An agent skill from guia-matthieu/clawfu-skills.
- : auditing website for broken links
- SKILL.md covers What Claude Does vs What You…, Dependencies, Commands and Skill Boundaries, plus 1 more section
- Runs Python scripts from its folder; calls python and pip
- Checking internal link structure
What it does
Link Checker is an agent skill from guia-matthieu/clawfu-skills. Find broken links on websites. Use when: auditing website for broken links; checking internal link structure; finding 404 errors; validating external links; pre-launch QA
Its SKILL.md is about 380 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including scripts (for example `scripts/main.py`).
It sits in Marketing & SEO. The repository describes itself as: 172 expert marketing skills for AI agents — ClawFu MCP Server. The licence is MIT.
When your agent uses it
- : auditing website for broken links
- Checking internal link structure
- Finding 404 errors
- Validating external links
Example prompts
- “/link-checker”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 4108f5c. 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
Ships 2 files in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
pythonpip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
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
Link Checker loads about 375 tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 99 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); the scripts in this folder are not scanned.
SKILL.md
The full file from guia-matthieu/clawfu-skills at commit 4108f5c, republished under its MIT licence (© guia-matthieu). 99 words, ~375 tokens.
Download SKILL.mdSave it as
.claude/skills/link-checker/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- link-checker
- description
- Find broken links on websites. Use when: auditing website for broken links; checking internal link structure; finding 404 errors; validating external links; pre-launch QA
- license
- MIT
- metadata.author
- ClawFu
- metadata.version
- 1.0.0
- metadata.mcp-server
- @clawfu/mcp-skills
Link Checker
Crawl websites to find broken links and 404 errors - essential for SEO health and user experience.
What Claude Does vs What You Decide
| Claude Does | You Decide |
|---|---|
| Structures analysis frameworks | Metric definitions |
| Identifies patterns in data | Business interpretation |
| Creates visualization templates | Dashboard design |
| Suggests optimization areas | Action priorities |
| Calculates statistical measures | Decision thresholds |
Dependencies
pip install aiohttp beautifulsoup4 clickCommands
python scripts/main.py check https://example.com --depth 2
python scripts/main.py report https://example.com --output broken-links.csvSkill Boundaries
What This Skill Does Well
- Structuring data analysis
- Identifying patterns and trends
- Creating visualization frameworks
- Calculating statistical measures
What This Skill Cannot Do
- Access your actual data
- Replace statistical expertise
- Make business decisions
- Guarantee prediction accuracy
Skill Metadata
- Mode: centaur
category: seo-tools
dependencies: [aiohttp, beautifulsoup4]
difficulty: beginner© guia-matthieu, 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 2 other files (scripts) in skills/seo-tools/link-checker of guia-matthieu/clawfu-skills.
- SKILL.md
- scripts/main.py
- scripts/requirements.txt
Open the folder on GitHubat commit 4108f5c
Compare with similar skills
Link Checker 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 |
|---|---|---|---|---|---|---|
| Link Checker this skillguia-matthieu/clawfu-skills | 150 | — | ~375 | Automated safety check: Pass | MIT | |
| Geo Fundamentalswasp-lang/wasp | 19k | 9 repos | ~861 | Automated safety check: Pass | MIT | |
| Ab Testingcoreyhaines31/marketingskills | 54k | 3 repos | ~3.1k | Automated safety check: Pass | MIT | |
| Hreflang and International SEOAgriciDaniel/claude-seo | 19k | 5 repos | ~3.4k | Automated safety check: Pass | MIT | |
| Referralscoreyhaines31/marketingskills | 54k | 2 repos | ~2.6k | Automated safety check: Pass | MIT | |
| SEO GeoReScienceLab/opc-skills | 1.8k | 4 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 |
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Related
Categories
Questions about Link Checker
What does Link Checker do?
Find broken links on websites. An agent skill from guia-matthieu/clawfu-skills. Link Checker is an agent skill from guia-matthieu/clawfu-skills. Find broken links on websites.
When should I use Link Checker?
Link Checker fits situations like: : auditing website for broken links; checking internal link structure; finding 404 errors; validating external links.
How do I install Link Checker in Claude Code?
Run `npx skills add guia-matthieu/clawfu-skills --skill link-checker -a claude-code`. Or copy the skill folder (skills/seo-tools/link-checker in guia-matthieu/clawfu-skills) into .claude/skills/link-checker in your project. Claude Code loads it when a task matches its description.
How do I install Link Checker in Codex?
Run `npx skills add guia-matthieu/clawfu-skills --skill link-checker -a codex`. Or copy the skill folder (skills/seo-tools/link-checker in guia-matthieu/clawfu-skills) into .agents/skills/link-checker in your project. Codex loads it when a task matches its description.
Can I use Link Checker 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 guia-matthieu/clawfu-skills --skill link-checker -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/link-checker, .gemini/skills/link-checker, .github/skills/link-checker and .opencode/skills/link-checker in your project.
What does Link Checker need to run?
Going by SKILL.md and its folder, Link Checker needs Python for the scripts in its folder and the command-line tools its instructions call (python and pip). Our summary lists: Python 3.
Does Link Checker access the network?
SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Link Checker 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Link Checker use?
Link Checker is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Link Checker use?
About 375 tokens (SKILL.md is roughly 1.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Link Checker?
Skills that share tags, products or a category with Link Checker: Geo Fundamentals (wasp-lang/wasp, 19k stars), Ab Testing (coreyhaines31/marketingskills, 54k stars), Hreflang and International SEO (AgriciDaniel/claude-seo, 19k stars) and Referrals (coreyhaines31/marketingskills, 54k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Link Checker?
guia-matthieu (a GitHub user) maintains it in guia-matthieu/clawfu-skills, which has 150 GitHub stars. The repository holds 31 skills in this directory. The repository was last updated on October 1, 2026.
Source: guia-matthieu/clawfu-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.