Borrowing it
Nothing to install: this file belongs to matteocervelli/llms. 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/matteocervelli/llms/main/.claude/skills/website-health/SKILL.mdgit clone --depth 1 https://github.com/matteocervelli/llmsWrote 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/matteocervelli/llms/website-health)<a href="https://agentmods.dev/skills/matteocervelli/llms/website-health"><img src="https://agentmods.dev/badge/skills/matteocervelli/llms/website-health/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/matteocervelli/llms/website-health"><img src="https://agentmods.dev/badge/skills/matteocervelli/llms/website-health.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00071 | $0.04474 |
| Opus 5 | $0.00036 | $0.02237 |
| Sonnet 5 | $0.00014 | $0.00895 |
| Haiku 4.5 | $0.00007 | $0.00447 |
Grade A, and why
website-health scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" --connect-timeout 5 "$URL" 2>/dev/null || true) How it starts
The opening of the file, as written. The whole thing — 486 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/website-health — Website Health Audit
Orchestrates a cross-cutting website audit across 7 dimensions. Designed for periodic invocation against live sites.
Architecture — hybrid orchestrator:
- Native checks (new lib scripts):
seo,performance,links,privacy,content - Pure delegation (existing sub-skill owns the logic):
a11y→/frontend a11y,security→/security-verify dast
Quick Start
/website-health <url> # quick summary, all 7 dimensions (L1)
/website-health full <url> # deep audit, all dimensions (L2+)
/website-health seo <url> # single dimension
/website-health performance <url> # single dimension
/website-health links <url> # single dimension
/website-health privacy <url> # single dimension
/website-health a11y <url> # delegates to /frontend a11y + pa11y
/website-health security <url> # delegates to /security-verify dast + extras
/website-health content <url> # single dimension
/website-health report <url> # full audit + persistent markdown report
/website-health patterns <dimension> # show fix recipes (seo, performance, links, privacy, a11y, security, content)
Workflow
Step 1: Parse Arguments
Parse $ARGUMENTS for subcommand, URL, and optional flags (--stack <name>).
Stack auto-detection (when no URL is provided, check in order):
| Stack | Marker | baseURL extraction |
|---|---|---|
| Astro Starlight | astro.config.mjs / astro.config.ts + @astrojs/starlight in package.json |
site: field in astro config, or SITE env var |
| Astro | astro.config.mjs / astro.config.ts |
site: field in astro config, or SITE env var |
| Hugo | hugo.toml or config.toml with baseURL |
baseURL value |
| Netlify | netlify.toml |
from underlying framework config |
| Next.js | next.config.js or next.config.ts |
NEXT_PUBLIC_SITE_URL env or localhost |
| Gatsby | gatsby-config.js with siteMetadata.siteUrl |
siteUrl value |
| Generic | package.json with homepage |
homepage value |
What ships with it
16 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- templates/a11y/patterns.md 2.5 KB
- templates/a11y/summary.md 1.3 KB
- templates/content/patterns.md 3.7 KB
- templates/content/summary.md 755 B
- templates/links/patterns.md 5.1 KB
- templates/links/summary.md 914 B
- templates/overview.md 2.6 KB
- templates/performance/patterns.md 4.3 KB
- templates/performance/summary.md 807 B
- templates/privacy/patterns.md 5.3 KB
- templates/privacy/summary.md 825 B
- templates/report-template.md 1.2 KB
- templates/security/patterns.md 3.3 KB
- templates/security/summary.md 1.2 KB
- templates/seo/patterns.md 5.5 KB
- templates/seo/summary.md 737 B
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.
- 6d ago First seen · 486 lines · 71 tokens per session scan A 3679ded17e6d
website-health is a skill published in the GitHub repository matteocervelli/llms (25 stars, last pushed 3mo ago), licensed MIT. It adds 71 tokens to every session and 4,474 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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