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 Dragoon0x/canon --skill canon-seogit clone --depth 1 https://github.com/Dragoon0x/canonWrote 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/dragoon0x/canon/canon-seo)<a href="https://agentmods.dev/skills/dragoon0x/canon/canon-seo"><img src="https://agentmods.dev/badge/skills/dragoon0x/canon/canon-seo/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/dragoon0x/canon/canon-seo"><img src="https://agentmods.dev/badge/skills/dragoon0x/canon/canon-seo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00062 | $0.00876 |
| Opus 5 | $0.00031 | $0.00438 |
| Sonnet 5 | $0.00012 | $0.00175 |
| Haiku 4.5 | $0.00006 | $0.00088 |
Grade A, and why
canon-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 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.
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CANON · SEO
Technical SEO is about making content findable and understandable by search engines. Not tricks — structure.
Semantic HTML is SEO
Search engines understand semantic HTML natively. Every rule in canon-accessibility that improves screen reader experience also improves SEO.
<h1>once per page, matching the page topic.- Heading hierarchy (h1 → h2 → h3) reflects content structure.
<nav>,<main>,<article>,<aside>help crawlers understand page layout.<a href>for links (not<div onClick>).<img alt>describes the image for image search.
Essential meta tags
<head>
<title>Page Title — Site Name</title>
<meta name="description" content="Concise summary under 155 characters.">
<link rel="canonical" href="https://example.com/page">
<meta name="robots" content="index, follow">
</head>
<title>: 50–60 characters. Unique per page. Primary keyword near the front.<meta description>: 120–155 characters. Compelling summary. Unique per page.<link rel="canonical">: prevents duplicate content penalties.<meta robots>:index, followis default.noindexfor admin pages.
Structured data (JSON-LD)
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Article",
"headline": "Page Title",
"author": { "@type": "Person", "name": "Author" },
"datePublished": "2026-04-18"
}
</script>
Use for: articles, products, FAQs, breadcrumbs, organizations, events. Google uses structured data for rich results (stars, prices, FAQ dropdowns).
Page speed = ranking factor
Core Web Vitals are a Google ranking signal. See canon-performance for targets:
- LCP ≤ 2.5s
- INP ≤ 200ms
- CLS ≤ 0.1
Crawlability
robots.txt: allow crawlers access to important pages, block admin/API routes.sitemap.xml: list all public pages with<lastmod>dates.- Internal linking: every important page reachable within 3 clicks from the homepage.
- No orphan pages (pages with no internal links pointing to them).
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.
- 7d ago First seen · 96 lines · 62 tokens per session scan A 97ae5ffb87e8
canon-seo is a skill published in the GitHub repository Dragoon0x/canon (5 stars, last pushed 4mo ago), licensed MIT. It adds 62 tokens to every session and 876 once invoked, about $0.0003 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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