seo

A guide to search engine optimization, the work of making web pages easier for search engines such as Google and Bing to find, understand, and rank.

In plain words
What is it for?
Use it to audit crawlability, indexing, redirects, titles, headings, structured data, sitemaps, internal links, keywords, and page performance.
Why use it?
It helps locate technical problems and content issues that can keep pages out of search results or make them less relevant to users.

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/drvoss/everything-copilot-cli/seo
Any agent
npx skills add drvoss/everything-copilot-cli --skill seo
Clone the repo
git clone --depth 1 https://github.com/drvoss/everything-copilot-cli

Made for: Claude Code, Codex.

Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,021 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 $0.00044 $0.01021
Opus 5 $0.00022 $0.00511
Sonnet 5 $0.00009 $0.00204
Haiku 4.5 $0.00004 $0.00102

Measured 2d ago against content hash 96744cd83be1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

seo 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 2d 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.

skills/content/seo/SKILL.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SEO

Improve search visibility through technical correctness, performance, and content relevance — not gimmicks.

Distinct from ai-visibility: This skill covers traditional search engine optimization (Google, Bing). ai-visibility covers GEO — optimizing for AI crawlers, llms.txt, and AI citation surfaces.

When to Use

  • Auditing crawlability, indexability, canonicals, or redirects
  • Improving title tags, meta descriptions, and heading structure
  • Adding or validating structured data (JSON-LD)
  • Improving Core Web Vitals (LCP, INP, CLS)
  • Keyword research and URL-to-keyword mapping
  • Planning internal linking or sitemap/robots changes

Principles

  1. Fix technical blockers before content optimization
  2. One page — one clear primary search intent
  3. Prefer long-term quality signals over manipulative patterns
  4. Mobile-first: indexing is mobile-first
  5. Recommendations should be page-specific and implementable

Technical SEO Checklist

Crawlability

  • robots.txt allows important pages, blocks low-value surfaces
  • No important page is unintentionally noindex
  • Important pages reachable within shallow click depth
  • No redirect chains longer than two hops
  • Canonical tags are self-consistent and non-looping

Indexability

  • Preferred URL format is consistent
  • Multilingual pages have correct hreflang if used
  • Sitemaps reflect the intended public surface
  • No duplicate URLs without canonical control

Core Web Vitals targets

Metric Target
LCP (Largest Contentful Paint) < 2.5s
INP (Interaction to Next Paint) < 200ms
CLS (Cumulative Layout Shift) < 0.1

Common fixes: preload hero assets · reduce render-blocking JS · reserve layout space · trim heavy third-party scripts

On-Page Rules

Title tags

  • ~50–60 characters
  • Primary keyword/concept near the front
  • Legible to humans first

Meta descriptions

  • ~120–160 characters
  • Honest description of the page
  • Include main topic naturally

Read the full file on GitHub · 136 lines

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. 2d ago First seen · 136 lines · 44 tokens per session scan A 96744cd83be1

Subscribe to this mod's changes

seo is a skill published in the GitHub repository drvoss/everything-copilot-cli (45 stars, last pushed 5d ago), licensed MIT. It adds 44 tokens to every session and 1,021 once invoked, about $0.0002 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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