An SEO audit skill for reviewing a website's search visibility and diagnosing problems such as missing metadata, technical issues, or ranking and traffic declines. SEO, or search engine optimization, is the work of helping pages appear in search results.

It is for auditing technical and on-page SEO, reviewing meta tags, and investigating search traffic or ranking problems.

It helps identify why a site may not be appearing or ranking well in search engines.

How MoonCellar-Team/MoonCellar configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to MoonCellar-Team/MoonCellar. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/MoonCellar-Team/MoonCellar/main/.agents/skills/seo-audit/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/MoonCellar-Team/MoonCellar

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/mooncellar-team/mooncellar/seo-audit/github.svg)](https://agentmods.dev/skills/mooncellar-team/mooncellar/seo-audit)

Your own site

<a href="https://agentmods.dev/skills/mooncellar-team/mooncellar/seo-audit"><img src="https://agentmods.dev/badge/skills/mooncellar-team/mooncellar/seo-audit/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/mooncellar-team/mooncellar/seo-audit"><img src="https://agentmods.dev/badge/skills/mooncellar-team/mooncellar/seo-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 170 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,813 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00170	$0.03813
Opus 5.5	$0.00068	$0.01525
Sonnet 5.5	$0.00034	$0.00763
Haiku 4.5	$0.00017	$0.00381

Measured yesterday against content hash 9420a6c1ffcf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 yesterday.

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.

**`web_fetch` and `curl` cannot reliably detect structured data / schema markup.**

.agents/skills/seo-audit/SKILL.md · 500 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

3 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.

yesterday First seen · 500 lines · 170 tokens per session scan A 9420a6c1ffcf

Subscribe to this mod's changes

seo-audit is a skill published in the GitHub repository MoonCellar-Team/MoonCellar (5 stars, last pushed 4d ago), with no licence file. It adds 170 tokens to every session and 3,813 once invoked, about $0.0007 per session on Opus 5.5. 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 2026-11-07.

Marketing and SEO anime bun feature-sliced-design games nextjs

seo-audit next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
seo-auditMoonCellar-Team/MoonCellar	Skill	5	4d ago	none	A	170	Claude Code, Codex
keeper-sh-calendar-mcpridafkih/keeper.sh	Skill	1.4k	yesterday	AGPL-3.0	A	121	Cursor
Next.js Expertahmadrrrtx/xr	Skill	6	3d ago	MIT	A	25	Claude Code, Codex
nextjs-architectureFilippoDeSilva/skills	Skill	2	4mo ago	none	A	46	Claude Code, Codex
ensembl-databasesynthetic-sciences/openscience	Skill	4.4k	yesterday	Apache-2.0	A	45	Claude Code, Codex
fast-typescript-checkinternet-development/www-sacred	Skill	1.6k	4d ago	MIT	A	84	Claude Code, Codex
implementation-readinessHoangNguyen0403/agent-skills-standard	Skill	583	yesterday	MIT	A	27	Codex

MoonCellar: Skill for Claude Code