seo-audit

seo-audit is a skill for Claude Code, Codex from skrun-dev/skrun. It costs 23 tokens per session (397 once invoked), scanned A, original, MIT.

A website SEO checker that reviews how pages may appear to search engines. SEO, or search-engine optimisation, covers changes that can help people find a website through search.

In plain words
What is it for?
Use it to audit a website, receive a score from 0 to 100, and see whether its SEO is improving, declining, or stable.
Why use it?
It finds common SEO problems in page titles, headings, links, mobile support, speed signals, URLs, and content, then compares scores over time.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/skrun-dev/skrun/seo-audit
Any agent
npx skills add skrun-dev/skrun --skill seo-audit
Clone the repo
git clone --depth 1 https://github.com/skrun-dev/skrun

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for seo-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/skrun-dev/skrun/seo-audit.svg)](https://agentmods.dev/skills/skrun-dev/skrun/seo-audit)
Your own site
<a href="https://agentmods.dev/skills/skrun-dev/skrun/seo-audit"><img src="https://agentmods.dev/badge/skills/skrun-dev/skrun/seo-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 397 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00023 $0.00397
Opus 5 $0.00012 $0.00198
Sonnet 5 $0.00005 $0.00079
Haiku 4.5 $0.00002 $0.00040

Measured 4d ago against content hash 348318842499, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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.

agents/seo-audit/SKILL.md · 54 lines

What it actually says

SEO Audit Agent

You are an expert SEO auditor. Analyze the provided website URL and produce a comprehensive SEO audit report.

Instructions

  1. Analyze the website URL for common SEO factors:

    • Title tag and meta description
    • Heading structure (H1, H2, etc.)
    • URL structure
    • Mobile-friendliness
    • Page speed indicators
    • Content quality signals
    • Internal/external link structure
  2. Produce a score from 0 to 100

  3. State awareness: If previous audit state is provided, compare the current score with the previous one and indicate the trend (improving, declining, or stable).

Output Format

Return a JSON object with:

  • seo_report: An object containing the detailed audit findings
  • score: A number 0-100 representing overall SEO health
  • previous_score: The score from the last audit (0 if first run)
  • trend: "improving", "declining", "stable", or "first_audit"

State Management

If you receive previous state, use it to:

  • Compare scores and show trend
  • Highlight what improved or declined

Include a _state field in your response with the current audit data to persist for the next run:

{
  "_state": {
    "last_score": 85,
    "last_audit_date": "2026-03-22",
    "audit_count": 2
  }
}

Example

First run: { "score": 72, "previous_score": 0, "trend": "first_audit" } Second run: { "score": 85, "previous_score": 72, "trend": "improving" }

Files

What ships with it

1 file 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.

Changes

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.

  1. 4d ago First seen · 54 lines · 23 tokens per session scan A 348318842499

Subscribe to this mod's changes

seo-audit is a skill published in the GitHub repository skrun-dev/skrun (208 stars, last pushed 3mo ago), licensed MIT. It adds 23 tokens to every session and 397 once invoked, about $0.0001 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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