heading-structure

heading-structure is a skill for Claude Code, Codex from T4wroot/agentic-seo. It costs 83 tokens per session (773 once invoked), scanned A, a copy of heading-structure, MIT.

A guide for organizing HTML headings from H1 through H6 so a page has a clear content hierarchy.

In plain words
What is it for?
Use it to review H1 usage, heading order, section titles, keyword placement, and page outlines.
Why use it?
It helps visitors and search engines understand the main topic, sections, and subsections of a page.

Skill for Claude CodeCodex

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

Good fit Use it to review H1 usage, heading order, section titles, keyword placement, and page outlines.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/t4wroot/agentic-seo/heading
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 T4wroot/agentic-seo --skill heading
Clone the repo
git clone --depth 1 https://github.com/T4wroot/agentic-seo

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 heading-structure

README.md
[![agentmods](https://agentmods.dev/badge/skills/t4wroot/agentic-seo/heading/github.svg)](https://agentmods.dev/skills/t4wroot/agentic-seo/heading)
Your own site
<a href="https://agentmods.dev/skills/t4wroot/agentic-seo/heading"><img src="https://agentmods.dev/badge/skills/t4wroot/agentic-seo/heading/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 heading-structure

Your own site · 80×15
<a href="https://agentmods.dev/skills/t4wroot/agentic-seo/heading"><img src="https://agentmods.dev/badge/skills/t4wroot/agentic-seo/heading.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 773 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 100% copy Near-identical to another mod 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 $0.00083 $0.00773
Opus 5 $0.00042 $0.00387
Sonnet 5 $0.00017 $0.00155
Haiku 4.5 $0.00008 $0.00077

Measured 7d ago against content hash d41eb49853a1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

heading-structure 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 7d 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.

Origin

This is a copy

100% identical to heading-structure — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/seo/on-page/heading/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SEO On-Page: Heading Structure

Guides heading (H1-H6) optimization for SEO and content structure.

When invoking: On first use, if helpful, open with 1-2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.

Scope (On-Page SEO)

  • H1 tag: One per page; clear headline; matches content; primary keyword near start
  • Header tags (H1-H6): Logical hierarchy; keyword in headers; one idea per heading

Initial Assessment

Check for project context first: If .claude/project-context.md or .cursor/project-context.md exists, read it for target keywords.

Identify:

  1. Page type: Homepage, article, product, etc.
  2. Primary keyword: Target search query
  3. Content outline: Main sections and subsections

Best Practices

H1

Principle Guideline
One per page Single H1 per page
Primary keyword Include target keyword naturally
Descriptive Clearly describe page content
Match intent Align with title tag and user intent

H2-H6 Hierarchy

Principle Guideline
Logical order H1 -> H2 -> H3; don't skip levels
One idea per heading Each heading = one topic
Scannable Headings should summarize section content
Keyword variation Use related keywords in subheadings

Structure

H1 (page title)
-> H2 (section 1)
   -> H3 (subsection)
   -> H3
-> H2 (section 2)
   -> H3
-> H2 (section 3)

Common Issues

Issue Fix
Multiple H1s Use single H1; use H2 for other sections
Skipped levels Use H2 after H1, H3 after H2
Generic headings Make descriptive; avoid "Introduction," "Conclusion"
Keyword stuffing Natural language; avoid forced keywords

Output Format

  • H1 recommendation (with keyword)
  • H2-H6 outline for content
  • Hierarchy check
  • References: Google headings

Read the full file on GitHub · 85 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. 7d ago First seen · 85 lines · 83 tokens per session scan A d41eb49853a1

Subscribe to this mod's changes

heading-structure is a skill published in the GitHub repository T4wroot/agentic-seo (15 stars, last pushed 7d ago), licensed MIT. It adds 83 tokens to every session and 773 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to heading-structure, differing in 0 lines, and is treated as a copy.

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