seo-optimization

seo-optimization is a skill for Claude Code, Codex from jxoesneon/Ciel. It costs 18 tokens per session (451 once invoked), scanned A, original, Apache-2.0.

A set of practices for improving how websites appear in search results through site structure, speed, page metadata, structured data, and search-intent mapping.

In plain words
What is it for?
Auditing crawlability, performance, titles, descriptions, headings, schema markup, and keyword-to-page assignments.
Why use it?
It helps prevent technical issues, slow pages, duplicate targeting, and misleading search markup from reducing visibility.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Auditing crawlability, performance, titles, descriptions, headings, schema markup, and keyword-to-page assignments.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jxoesneon/ciel/seo-optimization
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 jxoesneon/Ciel --skill seo-optimization
Clone the repo
git clone --depth 1 https://github.com/jxoesneon/Ciel

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.

agentmods badge for seo-optimization

README.md
[![agentmods](https://agentmods.dev/badge/skills/jxoesneon/ciel/seo-optimization/github.svg)](https://agentmods.dev/skills/jxoesneon/ciel/seo-optimization)
Your own site
<a href="https://agentmods.dev/skills/jxoesneon/ciel/seo-optimization"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/seo-optimization/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.

agentmods 80×15 button for seo-optimization

Your own site · 80×15
<a href="https://agentmods.dev/skills/jxoesneon/ciel/seo-optimization"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/seo-optimization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 451 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00018 $0.00451
Opus 5 $0.00009 $0.00226
Sonnet 5 $0.00004 $0.00090
Haiku 4.5 $0.00002 $0.00045

Measured 9d ago against content hash 582ce1112e2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-optimization 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.

skills/seo-optimization/SKILL.md · 49 lines

What it actually says

CIEL ADAPTATION: SEO Optimization (Search Logic)

This skill formalizes the "Technical SEO" layer. it focuses on correctness and performance rather than content-stuffing gimmicks.

The Technical Pillar

  1. Crawlability: Enforce shallow click depth, no unintended noindex, and non-looping canonicals.
  2. Performance: Hard gates for LCP < 2.5s and CLS < 0.1.
  3. Structured Data: Implement Organization, Product, and Article schema (JSON-LD) where appropriate.

On-Page Standards

  • Title Tags: 50-60 chars. Keyword near the front.
  • Meta Descriptions: 120-160 chars. Action-oriented value prop.
  • Heading Hierarchy: One clear H1. H2/H3 must reflect actual content structure, not just styling.

Keyword Mapping

  • Rule of One: Map ONE primary search intent to ONE canonical URL.
  • Cannibalization Check: Audit existing routes to ensure new pages don't compete with old ones.

Anti-Patterns

  • Schema Grift: Adding FAQ schema for content that isn't actually on the page.
  • Keyword Stuffing: Ignoring human readability to juice bot metrics.
  • Thin Pages: Creating programmatic "doorway" pages with near-identical content.
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. 9d ago First seen · 49 lines · 18 tokens per session scan A 582ce1112e2f

Subscribe to this mod's changes

seo-optimization is a skill published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed 5d ago), licensed Apache-2.0. It adds 18 tokens to every session and 451 once invoked, about $0.0001 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.

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