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 rampstackco/claude-skills --skill seo-content-gap-auditgit clone --depth 1 https://github.com/rampstackco/claude-skillsWrote 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/rampstackco/claude-skills/seo-content-gap-audit)<a href="https://agentmods.dev/skills/rampstackco/claude-skills/seo-content-gap-audit"><img src="https://agentmods.dev/badge/skills/rampstackco/claude-skills/seo-content-gap-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.
<a href="https://agentmods.dev/skills/rampstackco/claude-skills/seo-content-gap-audit"><img src="https://agentmods.dev/badge/skills/rampstackco/claude-skills/seo-content-gap-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00107 | $0.01923 |
| Opus 5 | $0.00053 | $0.00962 |
| Sonnet 5 | $0.00021 | $0.00385 |
| Haiku 4.5 | $0.00011 | $0.00192 |
Grade A, and why
seo-content-gap-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 9d 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 — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO Content Gap Audit
Find content gaps and decay using Ahrefs MCP data. Stack-agnostic. Produces a roadmap of create, update, merge, and prune actions across the existing content catalog and identified topic gaps.
When to use
- Planning the next quarter or half of content investment
- Refreshing a stale or underperforming content catalog
- Building topical authority in a target space
- Identifying decaying pages before they tank traffic
- Audit prep before a major site redesign or migration
- Diagnosing why content investment is not driving organic growth
When NOT to use
- Pure keyword research (use
seo-keyword) - Competitor keyword gap (use
seo-keyword-gap-audit) - Single-page optimization (use
seo-onpage) - Pure prune-and-redirect decisions (use
seo-content-audit) - New site planning with no existing content (use
content-strategy)
Required inputs
- Target property and content scope
- Competitor set (3-5 properties with comparable content depth)
- Target topics or pillars (if defined)
- Existing content inventory with URLs, primary topics, publish dates
- Performance data (organic clicks per page, ranked keywords per page)
- Confirmation Ahrefs MCP is connected
The framework: 4 categories of content opportunity
Every content opportunity falls into one of four categories. Different categories need different actions.
Content gap analysis is sharper with multiple data sources. Ahrefs surfaces keyword and topic gaps (the primary backend below). Similarweb surfaces traffic-driving page-level gaps (which of a competitor's pages earn meaningful traffic, not just rankings). Semrush surfaces SERP-feature gaps (where competitors win answer boxes, knowledge panels, People Also Ask placements). The three platforms often disagree on individual data points; that disagreement is itself a useful signal.
Category 1: Missing topics
Topics with traffic potential where the property has no relevant page at all. Competitors often rank in the top 10. The fix: create new content.
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.
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.
- 9d ago First seen · 166 lines · 107 tokens per session scan A e86db4cb846c
seo-content-gap-audit is a skill published in the GitHub repository rampstackco/claude-skills (848 stars, last pushed 4d ago), licensed MIT. It adds 107 tokens to every session and 1,923 once invoked, about $0.0005 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 2026-09-03.
Other skills, from other repositories
seo-site-health-audit
Triage technical SEO findings from Ahrefs Site Audit (and similar crawlers) by SEO impact, not just severity. Use this skill when reviewing crawl results, prioritizing technical fixes, scoping a technical SEO sprint, or after running any site-wide crawl. Triggers on site audit results, technical fix list, crawl…
seo-traffic-diagnosis
Diagnose organic traffic changes (drops, stalls, or unexpected wins) using Ahrefs MCP plus Search Console data. Use this skill when traffic suddenly dropped, has been flat despite investment, after an algorithm update, after a migration or deploy, or when a competitor seems to be taking share. Triggers on traffic…
content-strategy
Develop a content strategy covering editorial positioning, content pillars, formats, calendar, governance, and topical authority planning. Use this skill whenever the user wants to plan a content program, define content pillars, build an editorial calendar, structure topic clusters, set up content governance, or align…
seo-content-audit
Audit existing content across a site to decide what to keep, update, merge, redirect, or delete. Use this skill whenever the user wants to audit existing content, fix content decay, resolve keyword cannibalization, prune underperforming pages, prioritize content updates, or apply a keep/update/merge/redirect/delete…
skill-creation-walkthrough
Step-by-step guide for creating your own Claude Skills, from deciding whether a skill is the right tool to writing the SKILL.md file, structuring reference material, and making it trigger reliably. Use when you want to package a workflow, framework, or repeated task into a reusable Skill, when an existing skill is not…
content-and-copy
Write or edit website copy, blog content, and editorial pieces with attention to voice, structure, and goal. Use this skill whenever the user wants to write an article, draft website copy, edit existing content for clarity or voice, write a blog post, or produce general editorial content. Triggers on write a blog…