Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add seo-skills/seo-audit-skill --skill skillgit clone --depth 1 https://github.com/seo-skills/seo-audit-skillWrote 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/seo-skills/seo-audit-skill/skill)<a href="https://agentmods.dev/skills/seo-skills/seo-audit-skill/skill"><img src="https://agentmods.dev/badge/skills/seo-skills/seo-audit-skill/skill/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/seo-skills/seo-audit-skill/skill"><img src="https://agentmods.dev/badge/skills/seo-skills/seo-audit-skill/skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Privilege Escalation · line 141 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- medium Rogue Agent · line 96 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00080 | $0.05097 |
| Opus 5 | $0.00040 | $0.02549 |
| Sonnet 5 | $0.00016 | $0.01019 |
| Haiku 4.5 | $0.00008 | $0.00510 |
Grade A, and why
seo-audit 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 498 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO Audit Skill
Audit websites for SEO, technical, content, performance, security, JavaScript rendering, and AI readiness using the SEOmator CLI.
SEOmator provides comprehensive website auditing by analyzing website structure and content against 332 rules across 20 categories.
It provides a list of issues with severity levels, affected URLs, and actionable fix suggestions.
Links
- SEOmator npm package: npmjs.com/package/@seomator/seo-audit
- GitHub repository: github.com/seo-skills/seo-audit-skill
- Web UI: seomator.com/free-seo-audit-tool
What This Skill Does
This skill enables AI agents to audit websites for 332 rules in 20 categories, including:
- Core SEO (24 rules): Canonical URLs, indexing directives, title uniqueness, canonical conflicts/loops
- Performance (26 rules): LCP, CLS, FCP, TTFB, INP, compression, caching, minification, HTTP/2
- Links (24 rules): Broken links, redirect chains, anchor text, localhost/fragment links, plus click depth and inbound internal links from the site graph (
--crawl) - Images (14 rules): Alt text, dimensions, lazy loading, modern formats, alt length, background images
- Security (23 rules): HTTPS, HSTS, CSP, external link safety, leaked secrets, SSL expiry/protocol, cookie flags and lifetime
- Technical SEO (17 rules): robots.txt, sitemap.xml, URL structure, 404 pages, soft 404s, error codes
- Crawlability (35 rules): Sitemap conflicts, indexability signals, canonical chains, pagination issues, sitemap lastmod quality
- Structured Data (13 rules): Schema.org markup, Article, Organization, FAQ, Product, Breadcrumb
- JavaScript Rendering (16 rules): Rendered DOM checks, raw vs rendered mismatches, SSR detection, console errors, failed resource requests
- Accessibility (31 rules): ARIA labels, color contrast, form labels, landmarks, touch targets
- Content (19 rules): Word count, readability, keyword density, duplicate detection, pixel widths
- Social (9 rules): Open Graph tags, Twitter cards, share buttons, profile links
- E-E-A-T (14 rules): Author bylines, citations, trust signals, about/contact pages, YMYL detection
- URL Structure (14 rules): Keyword slugs, stop words, uppercase, underscores, session IDs, tracking params
- Redirects (11 rules): Redirect loops, types (301/302), meta refresh, JavaScript redirects, broken redirects
- Mobile (12 rules): Font sizes, horizontal scroll, interstitials, viewport, mobile-first parity (content, title, canonical, structured data, links) via
--mobile - Internationalization (13 rules): lang attribute, hreflang validation (return links, conflicts, mismatches)
- HTML Validation (11 rules): Doctype, charset, head structure, lorem ipsum, multiple titles/descriptions
- AI/GEO Readiness (5 rules): Semantic HTML, AI bot access, llms.txt, schema drift
- Legal Compliance (1 rule): Cookie consent
What ships with it
2 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.
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.
- 4d ago Changed · +10 lines 5d5ba8cf72d5
- 6d ago Changed · +9 lines cd06cd43cd59
- 7d ago Changed · +115 lines · +21 tokens per session 0da2b2e4ebec
- 11d ago First seen · 364 lines · 59 tokens per session scan A 644b7f5ec46b
seo-audit is a skill published in the GitHub repository seo-skills/seo-audit-skill (423 stars, last pushed 5d ago), licensed MIT. It adds 80 tokens to every session and 5,097 once invoked, about $0.0004 per session on Opus 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.
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