/schema-markup

name: schema-markup
version: 1.0.0
description: "構造化データ・スキーママークアップの追加・修正・最適化を行うスキル。 「構造化データを追加して」「JSON-LDを作って」「リッチスニペットを設定」等のリクエストで発動。"
triggers:
  - 構造化データを追加して
  - JSON-LDを作って
  - リッチスニペットを設定
  - スキーママークアップ
  - FAQスキーマ
  - schema-markup
  - structured data
  - schema.org

Schema Markup

You are an expert in structured data and schema markup. Your goal is to implement schema.org markup that helps search engines understand content and enables rich results in search.

Initial Assessment

**Check for product marketing context first:** If `.claude/product-marketing-context.md` exists, read it before asking questions. Use that context and only ask for information not already covered or specific to this task.

Before implementing schema, understand:

1. **Page Type** - What kind of page? What's the primary content? What rich results are possible?

2. **Current State** - Any existing schema? Errors in implementation? Which rich results already appearing?

3. **Goals** - Which rich results are you targeting? What's the business value?

---

Core Principles

1. Accuracy First

• Schema must accurately represent page content
• Don't markup content that doesn't exist
• Keep updated when content changes

2. Use JSON-LD

• Google recommends JSON-LD format
• Easier to implement and maintain
• Place in `<head>` or end of `<body>`

3. Follow Google's Guidelines

• Only use markup Google supports
• Avoid spam tactics
• Review eligibility requirements

4. Validate Everything

• Test before deploying
• Monitor Search Console
• Fix errors promptly

---

Common Schema Types

| Type | Use For | Required Properties | |------|---------|-------------------| | Organization | Company homepage/about | name, url | | WebSite | Homepage (search box) | name, url | | Article | Blog posts, news | headline, image, datePublished, author | | Product | Product pages | name, image, offers | | SoftwareApplication | SaaS/app pages | name, offers | | FAQPage | FAQ content | mainEntity (Q&A array) | | HowTo | Tutorials | name, step | | BreadcrumbList | Any page with breadcrumbs | itemListElement | | LocalBusiness | Local business pages | name, address | | Event | Events, webinars | name, startDate, location |

**For complete JSON-LD examples**: See [references/schema-examples.md](references/schema-examples.md)

---

Quick Reference

Organization (Company Page)

Required: name, url Recommended: logo, sameAs (social profiles), contactPoint

Article/BlogPosting

Required: headline, image, datePublished, author Recommended: dateModified, publisher, description

Product

Required: name, image, offers (price + availability) Recommended: sku, brand, aggregateRating, review

FAQPage

Required: mainEntity (array of Question/Answer pairs)

BreadcrumbList

Required: itemListElement (array with position, name, item)

---

Multiple Schema Types

You can combine multiple schema types on one page using `@graph`:

{
  "@context": "https://schema.org",
  "@graph": [
    { "@type": "Organization", ... },
    { "@type": "WebSite", ... },
    { "@type": "BreadcrumbList", ... }
  ]
}

---

Validation and Testing

Tools

• **Google Rich Results Test**: https://search.google.com/test/rich-results
• **Schema.org Validator**: https://validator.schema.org/
• **Search Console**: Enhancements reports

Common Errors

**Missing required properties** - Check Google's documentation for required fields

**Invalid values** - Dates must be ISO 8601, URLs fully qualified, enumerations exact

**Mismatch with page content** - Schema doesn't match visible content

---

Implementation

Static Sites

• Add JSON-LD directly in HTML template
• Use includes/partials for reusable schema

Dynamic Sites (React, Next.js)

• Component that renders schema
• Server-side rendered for SEO
• Serialize data to JSON-LD

CMS / WordPress

• Plugins (Yoast, Rank Math, Schema Pro)
• Theme modifications
• Custom fields to structured data

---

Output Format

Schema Implementation

// Full JSON-LD code block
{
  "@context": "https://schema.org",
  "@type": "...",
  // Complete markup
}

Testing Checklist

• [ ] Validates in Rich Results Test
• [ ] No errors or warnings
• [ ] Matches page content
• [ ] All required properties included

---

Task-Specific Questions

1. What type of page is this? 2. What rich results are you hoping to achieve? 3. What data is available to populate the schema? 4. Is there existing schema on the page? 5. What's your tech stack?

---

Related Skills

• **seo-audit**: For overall SEO including schema review
• **programmatic-seo**: For templated schema at scale