seo-audit

An agent skill by coreyhaines31, from coreyhaines31/marketingskills. Tags: analysis, performance, search, seo, troubleshooting.

What it does

When the user wants to audit, review, or diagnose SEO issues on their site. Also use when the user mentions "SEO audit," "technical SEO," "why am I not ranking," "SEO issues," "on-page SEO," "meta tags review," "SEO health check," "my traffic dropped," "lost rankings," "not showing up in Google," "site isn't ranking," "Google update hit me," "page speed," "core web vitals," "crawl errors," or "indexing issues." Use this even if the user just says something vague like "my SEO is bad" or "help with SEO" — start with an audit. For building pages at scale to target keywords, see programmatic-seo. For adding structured data, see schema. For AI search optimization, see ai-seo.

Install

With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:

npx skills add coreyhaines31/marketingskills --skill seo-audit

Or copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):

git clone --depth 1 https://github.com/coreyhaines31/marketingskills
cp -r marketingskills/skills/seo-audit ~/.claude/skills/seo-audit

Safety box score

Grade A, minimal risk: 9 of 100 risk points, rated 2026-10-20. The grade rates what the skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. How the score works.

This is a read-only SEO audit skill: it inspects site pages, robots/sitemaps, and optionally Search Console/analytics data, and it may use external validators like Google’s Rich Results Test. It does not ship code or change system settings, but it can send live URLs and page content to third-party tools while producing recommendations for technical, on-page, and local SEO fixes.

Category levels, from 0 (none) to 3 (high)
Category	Level	Why
Code & shell execution	0 (none)	No native scripts, shell commands, or code execution are shipped with the skill; it is Markdown guidance plus references.
Network access	1 (low)	The skill explicitly uses live web tools and external validators such as `web_fetch`, `curl`, and Google Rich Results Test, so page URLs/content may leave the machine.
Filesystem reach	0 (none)	It only reads project-local context files like `.agents/product-marketing.md` if present and does not write outside the working directory or touch system paths.
Secrets & credentials	1 (low)	It asks about and may use Search Console / analytics access and business profile exports, which can involve account data, but it does not request passwords or key material.
Privilege & persistence	0 (none)	There is no sudo, global install, service registration, or shell/OS configuration in the skill.
Instruction hijack surface	0 (none)	The skill warns that fetched pages are untrusted and should not be followed; it does not tell the agent to ignore its rules or act on fetched instructions.
Irreversible actions	0 (none)	It recommends audits and follow-up actions, but it does not autonomously publish, pay, deploy, or send messages.
Transparency	0 (none)	All shipped files are plain text Markdown references; there are no binaries, minified blobs, or runtime-decoded code.

Before installing

Decide whether you’re comfortable sending audited page URLs/content to Google tools or other third-party validators.
If you may share Search Console or analytics access, use a least-privilege or export-only approach first.
Check whether you want local SEO advice to reference business-profile and review data, since that can involve customer-facing account information.

Rated 2026-10-20 by an automated review of 9 files from the skill's repository.

Source

Repository: coreyhaines31/marketingskills (all skills from this repository)
Path: skills/seo-audit/SKILL.md
Branch: main
Collection: marketingskills
Updated: 2026-09-21

competitors — When the user wants to create competitor comparison or alternative pages for SEO and sales enablement.
principle-fix-root-causes — Apply when debugging.
seo-audit — Full website SEO audit with parallel subagent delegation.
seo-page — Deep single-page SEO analysis covering on-page elements, content quality, technical meta tags, schema, images, and performance.
seo-seranking — SE Ranking AI visibility analyst (extension). Tracks AI Share-of-Voice across ChatGPT, Gemini, Perplexity, AI Overviews, and AI Mode in a single query.
seo-sxo — Search Experience Optimization: reads Google SERPs backwards to detect page-type mismatches, derives user stories from search intent signals.