What is schema-markup?

A guide for adding structured data—machine-readable information about a webpage, usually written as JSON-LD, that search engines can use for enhanced search listings.

Adding, checking, or fixing FAQ, product, review, breadcrumb, and other schema markup through code, a CMS, or Google Tag Manager.

It helps identify suitable schema types and correct errors so search engines can better understand pages and may show extra details in results.

schema-markup — Skill for Claude Code and Codex by Sudhakaran88

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 Sudhakaran88/solopreneur-skills --skill schema-markup

Clone the repo

git clone --depth 1 https://github.com/Sudhakaran88/solopreneur-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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/sudhakaran88/solopreneur-skills/schema-markup/github.svg)](https://agentmods.dev/skills/sudhakaran88/solopreneur-skills/schema-markup)

Your own site

<a href="https://agentmods.dev/skills/sudhakaran88/solopreneur-skills/schema-markup"><img src="https://agentmods.dev/badge/skills/sudhakaran88/solopreneur-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/sudhakaran88/solopreneur-skills/schema-markup"><img src="https://agentmods.dev/badge/skills/sudhakaran88/solopreneur-skills/schema-markup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,257 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.

Model	Per session	Once invoked
Fable 5.1	$0.00092	$0.03257
Opus 5.5	$0.00037	$0.01303
Sonnet 5.5	$0.00018	$0.00651
Haiku 4.5	$0.00009	$0.00326

Measured 2mo ago against content hash e920e3d3a081, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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 · 290 lines

How it starts

The opening of the file, as written. The whole thing — 290 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a structured data expert helping solopreneurs implement schema markup that earns rich results, improves click-through rates, and signals entity clarity to both Google and AI search engines.

When to Use This Skill

Trigger this skill when the user wants to:

Add schema markup to a page for the first time
Fix schema validation errors flagged in Google Search Console
Understand which schema types to prioritize for their site
Improve click-through rates through rich results
Make their content more legible to AI search engines (Perplexity, ChatGPT, Google AI Overviews)
Audit existing structured data for gaps or mistakes
Implement schema via code, CMS plugin, or Google Tag Manager

Context Check

Before diving into implementation, ask or confirm:

What CMS or platform are they on? (WordPress, Webflow, Framer, custom code, Shopify, etc.)
What type of site is it? (SaaS, blog, local service, e-commerce, personal brand, course site)
Do they already have schema markup? If yes, have they checked GSC for errors?
What pages are the priority? (Homepage, product pages, blog posts, landing pages)
Have they validated their markup? (Rich Results Test, Schema Markup Validator)

Do not recommend a schema type before knowing what the page is actually about. Schema must reflect visible page content — not aspirational content.

What Schema Markup Does (and Does Not Do)

What it DOES:

Enables rich results in Google SERP (star ratings, price, breadcrumbs, sitelinks, etc.)
Improves click-through rate — rich results see 20–40% higher CTR vs. plain listings
Sends entity clarity signals to Google's Knowledge Graph
Makes content more parseable by AI search engines (Perplexity, Bing Copilot, ChatGPT)
Helps AI Overviews and AI Mode cite your content more reliably
Supports GEO (Generative Engine Optimization) — 81% of AI-cited pages have schema markup

What it DOES NOT:

Does not directly improve rankings. Google has confirmed this repeatedly. Schema is a visibility tool, not a ranking signal.
Does not substitute for good content or technical SEO
Does not guarantee rich results — Google decides whether to display them
Does not help if the schema doesn't match the visible page content

Read the full file on GitHub · 290 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.

2mo ago First seen · 290 lines · 92 tokens per session scan A e920e3d3a081

Subscribe to this mod's changes

schema-markup is a skill published in the GitHub repository Sudhakaran88/solopreneur-skills (7 stars, last pushed 4mo ago), licensed MIT. It adds 92 tokens to every session and 3,257 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-31.

Claude Code Marketing and SEO ai-agent ai-agents ai-seo claude-cowork claude-cowork-plugin

schema-markup next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
schema-markupSudhakaran88/solopreneur-skills	Skill	7	4mo ago	MIT	A	92	Claude Code, Codex
lintSkyfox-io/Memex	Skill	17	4mo ago	MIT	A	107	Claude Code
session-endSkyfox-io/Memex	Skill	17	4mo ago	MIT	A	56	Claude Code
upgradeSkyfox-io/Memex	Skill	17	4mo ago	MIT	A	58	Claude Code
consolidateSkyfox-io/Memex	Skill	17	4mo ago	MIT	A	57	Claude Code
reindexSkyfox-io/Memex	Skill	17	4mo ago	MIT	A	58	Claude Code
session-startSkyfox-io/Memex	Skill	17	4mo ago	MIT	A	45	Claude Code