schema-markup

schema-markup is a skill for Claude Code, Codex from OpenClaudia/openclaudia-skills. It costs 82 tokens per session (4,444 once invoked), scanned A, original, MIT.

A generator for Schema.org structured data, usually written as JSON-LD, which gives search engines extra information about a webpage and its content.

In plain words
What is it for?
Use it to create markup for articles, products, FAQs, breadcrumbs, organizations, reviews, how-to pages, and other supported page types.
Why use it?
It helps pages describe themselves clearly to search engines and may make them eligible for enhanced search-result displays.

Skill for Claude CodeCodex

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

not rated 689repo +9 today A scan Socket: passSnyk: warnSkillSpector: warn 82 tokens original MIT

Good fit Use it to create markup for articles, products, FAQs, breadcrumbs, organizations, reviews, how-to pages, and other supported page types.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/openclaudia/openclaudia-skills/schema-markup
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 OpenClaudia/openclaudia-skills --skill schema-markup
Clone the repo
git clone --depth 1 https://github.com/OpenClaudia/openclaudia-skills

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 schema-markup

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/openclaudia/openclaudia-skills/schema-markup"><img src="https://agentmods.dev/badge/skills/openclaudia/openclaudia-skills/schema-markup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,444 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. Third-party audits
  • Socket pass 18 Mar 2026
  • Snyk warn 16 Feb 2026
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Output Handling · line 553
    Model output is used without validation or sanitization. Unvalidated output injected into downstream contexts (SQL, shell, HTML) enables injection attacks and arbitrary code execution.
    Fix: Validate and sanitize all model output before using it in downstream contexts. Use parameterized queries for SQL, shell quoting for commands, and HTML encoding for web output.
  • high Output Handling · line 573
    Model output is used without validation or sanitization. Unvalidated output injected into downstream contexts (SQL, shell, HTML) enables injection attacks and arbitrary code execution.
    Fix: Validate and sanitize all model output before using it in downstream contexts. Use parameterized queries for SQL, shell quoting for commands, and HTML encoding for web output.
How audits are shown
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 $0.00082 $0.04444
Opus 5 $0.00041 $0.02222
Sonnet 5 $0.00016 $0.00889
Haiku 4.5 $0.00008 $0.00444

Measured 12d ago against content hash 4e3a29b9d8d9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

schema-markup 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 12d 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/schema-markup/SKILL.md · 609 lines

How it starts

The opening of the file, as written. The whole thing — 609 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Schema Markup Generator Skill

You are an expert in Schema.org structured data and Google's rich results requirements. Generate valid, complete JSON-LD markup that maximizes eligibility for Google rich results.

Supported Schema Types

This skill supports the following schema types. When the user asks for schema, determine which type(s) are appropriate based on the page content.

1. Article / BlogPosting / NewsArticle

Use for: Blog posts, news articles, editorial content Rich result: Article carousel, headline in search

{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "Your Article Title (max 110 characters)",
  "description": "Brief description of the article (max 160 characters)",
  "image": [
    "https://example.com/image-16x9.jpg",
    "https://example.com/image-4x3.jpg",
    "https://example.com/image-1x1.jpg"
  ],
  "datePublished": "2025-01-15T08:00:00+00:00",
  "dateModified": "2025-01-20T10:30:00+00:00",
  "author": [{
    "@type": "Person",
    "name": "Author Name",
    "url": "https://example.com/author/name",
    "jobTitle": "Senior Editor",
    "sameAs": [
      "https://twitter.com/authorhandle",
      "https://linkedin.com/in/authorname"
    ]
  }],
  "publisher": {
    "@type": "Organization",
    "name": "Publisher Name",
    "logo": {
      "@type": "ImageObject",
      "url": "https://example.com/logo.png",
      "width": 600,
      "height": 60
    }
  },
  "mainEntityOfPage": {
    "@type": "WebPage",
    "@id": "https://example.com/article-url"
  },
  "wordCount": 2500,
  "articleSection": "Technology",
  "keywords": ["keyword1", "keyword2", "keyword3"],
  "isAccessibleForFree": true
}

Google requirements:

  • headline is required (max 110 characters)
  • image is required (provide 3 aspect ratios: 16:9, 4:3, 1:1; each > 696px wide)
  • datePublished is required (ISO 8601 format)
  • author.name is required
  • For NewsArticle, also add dateline if applicable
  • For BlogPosting, @type changes to "BlogPosting"

Read the full file on GitHub · 609 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. 12d ago First seen · 609 lines · 82 tokens per session scan A 4e3a29b9d8d9

Subscribe to this mod's changes

schema-markup is a skill published in the GitHub repository OpenClaudia/openclaudia-skills (689 stars, last pushed today), licensed MIT. It adds 82 tokens to every session and 4,444 once invoked, about $0.0004 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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