Borrowing it
Nothing to install: this file belongs to crystian/skill-map. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/crystian/skill-map/main/.claude/skills/sm-tutorial/fixtures-data/sets/harness/en/__PROVIDER__/skills/check-links/SKILL.mdgit clone --depth 1 https://github.com/crystian/skill-mapWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/crystian/skill-map/check-links)<a href="https://agentmods.dev/skills/crystian/skill-map/check-links"><img src="https://agentmods.dev/badge/skills/crystian/skill-map/check-links/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/crystian/skill-map/check-links"><img src="https://agentmods.dev/badge/skills/crystian/skill-map/check-links.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.00132 |
| Opus 5.5 | $0.00011 | $0.00053 |
| Sonnet 5.5 | $0.00006 | $0.00026 |
| Haiku 4.5 | $0.00003 | $0.00013 |
Grade A, and why
check-links scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
check-links
The last gate before the site goes out.
Steps
- List every HTML file under
public/. - For each page, collect its internal links (every
hrefto/or to a.htmlfile). - Check the target exists under
public/(treat/aspublic/index.html). - Report any link whose target is missing; if none, report "0 broken links".
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 17 lines · 28 tokens per session scan A 3061d73d889f
check-links is a skill published in the GitHub repository crystian/skill-map (77 stars, last pushed 2mo ago), licensed MIT. It adds 28 tokens to every session and 132 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
check-links compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| check-linkscrystian/skill-map | Skill | 77 | 2mo ago | MIT | A | 28 | Claude Code |
| minipostiz-facebook-setupjavimosch/supercli | Skill | 57 | 4d ago | MIT | A | 32 | Claude Code, Codex |
| mmx.agent-guidejavimosch/supercli | Skill | 57 | 4d ago | MIT | A | 34 | Claude Code, Codex |
| minipostiz-reddit-setupjavimosch/supercli | Skill | 57 | 4d ago | MIT | A | 34 | Claude Code, Codex |
| minipostiz-telegram-setupjavimosch/supercli | Skill | 57 | 4d ago | MIT | A | 34 | Claude Code, Codex |
| minipostiz-x-setupjavimosch/supercli | Skill | 57 | 4d ago | MIT | A | 37 | Claude Code, Codex |
| clawteam.case_study.veg_basket_pocjavimosch/supercli | Skill | 57 | 4d ago | MIT | A | 35 | Claude Code, Codex |