seo-audit

seo-audit is a skill for Claude Code from teamniteo/hakuto. It costs 144 tokens per session (4,843 once invoked), scanned A, original, MIT.

A report-only check of the built HTML files for an Astro website. It reviews search-engine basics such as page titles, headings, links, images, structured data, sitemaps, and robots.txt.

In plain words
What is it for?
Use it to audit one page, a group of pages, or an entire built site for indexability, metadata, accessibility-related image details, links, schema, and related SEO issues.
Why use it?
It finds problems that can make pages harder for search engines, users, or AI agents to understand and access.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the AskUserQuestion tool; mentions AGENTS.md.

Part of the hakuto plugin — 14 skills, 1 command, 1 agent shipped together

Good fit Use it to audit one page, a group of pages, or an entire built site for indexability, metadata, accessibility-related image details, links, schema, and related SEO issues.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/teamniteo/hakuto/seo-audit
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.

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

Made for: Claude Code.

Or install hakuto, the plugin that ships this one along with the rest of its 14 skills, 1 command, 1 agent.

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/teamniteo/hakuto/seo-audit.svg)](https://agentmods.dev/skills/teamniteo/hakuto/seo-audit)
Your own site
<a href="https://agentmods.dev/skills/teamniteo/hakuto/seo-audit"><img src="https://agentmods.dev/badge/skills/teamniteo/hakuto/seo-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 144 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,843 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00144 $0.04843
Opus 5 $0.00072 $0.02422
Sonnet 5 $0.00029 $0.00969
Haiku 4.5 $0.00014 $0.00484

Measured 8d ago against content hash a91481f710d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

seo-audit 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 8d 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.

- **External link liveness (opt-in):** `Bash` → `curl -sS -o /dev/null -w '%{http_code}' -I -L --max-time 10`.
skills/seo-audit/SKILL.md · 359 lines

How it starts

The opening of the file, as written. The whole thing — 359 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SEO Audit

Validate SEO on Astro-built sites.

Flexible Scope: This skill adapts to test based on user request:

  • Single page: "Test SEO for homepage" or "Check SEO on about page"
  • Group of pages: "Test SEO for pricing and contact pages" or "Check all blog posts"
  • Whole website: "Run SEO test" or "Test all pages for SEO"

Steps 1–7 audit built HTML in _dist/ and never write. Steps 8–9 are opt-in and need a deployed domain: an is-agentic agent-readiness scan, and — only if the user asks for it — applying that report's fixes to source.

Check Catalogue

The checks themselves live in references/, each carrying its own severity. Read the relevant file when you reach the step that uses it — don't work from memory.

File Used by Contents
references/checks-onpage.md Step 5 Meta tags, <html lang>, headings, alt text, image asset health and right-sizing (local and third-party), text contrast, URL hygiene, mixed content, internal links, external link liveness
references/checks-schema.md Step 5 JSON-LD: per-type expectations, conflicting @id, rating substantiation, entity-escaped values, author identity, and the do-not-recommend list
references/checks-technical.md Step 6 Sitemap, robots.txt, Content-Signal, crawler-signal _headers rules, duplicate /index.html, llms.txt coverage, favicon, feed autodiscovery, page weight, JS-dependent commercial content
references/example-report.md Output Report template — match its shape and headings verbatim

Execution Flow

0. Determine Test Scope

Parse user request to identify which pages to test:

Whole website (default if not specified):

  • "Run SEO test", "Test SEO", "Check all pages"
  • Test ALL .html files in _dist

Single page:

  • "Test SEO for homepage" → test _dist/index.html
  • "Check about page SEO" → test _dist/about.html
  • "Validate pricing page" → test _dist/pricing.html

Group of pages:

  • "Test pricing and contact" → test _dist/pricing.html, _dist/contact.html
  • "Check all blog posts" → test _dist/blog/*.html
  • "Test feature pages" → identify and test matching pages

Read the full file on GitHub · 359 lines

Files

What ships with it

4 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.

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. 8d ago First seen · 359 lines · 144 tokens per session scan A a91481f710d8

Subscribe to this mod's changes

seo-audit is a skill published in the GitHub repository teamniteo/hakuto (5 stars, last pushed 7d ago), licensed MIT. It adds 144 tokens to every session and 4,843 once invoked, about $0.0007 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 2026-08-31.

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