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Schema markup skill

Schema markup is part of Corey Haines' marketing skills. Its job is to add and fix structured data so pages qualify for rich results. It loads on its own when a request matches its description, and you can also call it by name.

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When the agent reaches for it

The agent keeps every installed skill's description in view and loads the full instructions when a request matches. This is the description it reads:

When the user wants to add, fix, or optimize schema markup and structured data on their site. Also use when the user mentions "schema markup," "structured data," "JSON-LD," "rich snippets," "schema.org," "FAQ schema," "product schema," "review schema," "breadcrumb schema," "Google rich results," "knowledge panel," "star ratings in search," or "add structured data." Use this whenever someone wants their pages to show enhanced results in Google. For broader SEO issues, see seo-audit. For AI search optimization, see ai-seo.

What the instructions cover

The sections of its SKILL.md, in order.

  • Initial Assessment
  • Core Principles
  • Common Schema Types
  • Quick Reference
  • Multiple Schema Types
  • Validation and Testing
  • Implementation
  • Output Format
  • Task-Specific Questions
  • Related Skills

What ships with it

Besides SKILL.md, the folder carries these. The agent opens them only when a step in the instructions calls for one.

  • evals/ 1 file · 6 KB
  • references/ 1 file · 8 KB

Install the schema markup skill

For Claude Code, run this in a terminal. It comes from the publisher's own instructions.

terminal 
npx skills add coreyhaines31/marketingskills --skill schema -a claude-code

License: MIT.

In Longwave, add Marketing Skills from the marketplace. It installs all 50 of its skills, and your Claude Code, Codex and OpenCode threads can use them.

Questions people ask

How do I install the schema markup skill?

For Claude Code, run npx skills add coreyhaines31/marketingskills --skill schema -a claude-code in a terminal. In Longwave, add Marketing Skills from the marketplace, and its skills reach your Claude Code, Codex and OpenCode threads.

When does the agent use the schema markup skill?

When a request matches its description. The agent keeps only the name and description of each installed skill in view, and reads the full instructions when a task fits. You can also ask for it by name.

Use your skills in every harness.

Longwave installs a skill collection once, and your Claude Code, Codex and OpenCode threads can all use it.

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