
Seo Schema
- 32 installs
- 548 repo stars
- Updated July 20, 2026
- agricidaniel/codex-seo
seo-schema is a Claude Code skill that detects, validates, and generates Schema.org structured data (JSON-LD) for web pages.
About
seo-schema is a Claude Code skill that detects, validates, and generates Schema.org structured data for web pages, preferring JSON-LD format. A developer invokes it to check a page for existing markup, validate it against Google's supported rich result types, and generate valid JSON-LD for the correct schema type. It tracks which schema types are active, restricted, or deprecated so recommendations stay current.
- Detects, validates, and generates Schema.org structured data with JSON-LD preferred
- Flags deprecated schema types (HowTo, SpecialAnnouncement) and restricted FAQ usage
- Ships ready-to-use JSON-LD templates for Organization, LocalBusiness, and Article
Seo Schema by the numbers
- 32 all-time installs (skills.sh)
- +3 installs in the week ending Jul 12, 2026 (Skillselion tracking)
- Ranked #1,397 of 1,879 Marketing & SEO skills by installs in the Skillselion catalog
- Data as of Aug 5, 2026 (Skillselion catalog sync)
seo-schema capabilities & compatibility
- Capabilities
- schema generation · schema validation · seo audit · structured data
- Use cases
- seo
- Pricing
- Free
What seo-schema says it does
Detect, validate, and generate Schema.org structured data. JSON-LD format
Always recommend JSON-LD as primary format (Google's stated preference)
**HowTo**: Rich results removed September 2023
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| Installs | 32 |
|---|---|
| repo stars | ★ 548 |
| Last updated | July 20, 2026 |
| Repository | agricidaniel/codex-seo ↗ |
What it does
Audit a page for structured-data errors and generate valid JSON-LD markup for eligible rich result types.
Who is it for?
Adding or fixing JSON-LD structured data to become eligible for Google rich results
Skip if: Content writing or general HTML editing unrelated to structured data
When should I use this skill?
user says schema, structured data, rich results, JSON-LD, or markup
What you get
Validated, deploy-ready JSON-LD markup for the correct schema type plus a SCHEMA-REPORT.md.
- SCHEMA-REPORT.md
- valid JSON-LD markup
By the numbers
- Recommends JSON-LD across 25+ active Schema.org types
- Flags 8 deprecated or retired rich-result types
Files
Schema Markup Analysis & Generation
Shared Data Cache
Step 0 -- Check shared data cache:
Before gathering, check .seo-cache/ for reusable context from related SEO skills. Reference: ../seo/references/shared-data-cache.md for schemas and dependency map.
Check these cache files when present:
.seo-cache/site-meta.jsonfor domain, business type, industry, and crawl context.seo-cache/audit-scores.jsonfor prior full-audit priorities.seo-cache/pages/{url-slug}/page-analysis.jsonfor page-level context when a URL is provided
- If found: parse and use clearly valid fields (note "Using cached [X] from [date]")
- If missing, corrupt, or irrelevant: continue with fresh evidence
- If the user says "refresh" or "re-run": ignore cache reads and overwrite on write
Detection
1. Scan page source for JSON-LD <script type="application/ld+json"> 2. Check for Microdata (itemscope, itemprop) 3. Check for RDFa (typeof, property) 4. Always recommend JSON-LD as primary format (Google's stated preference)
Validation
- Check required properties per schema type
- Validate against Google's supported rich result types
- Test for common errors:
- Missing @context
- Invalid @type
- Wrong data types
- Placeholder text
- Relative URLs (should be absolute)
- Invalid date formats
- Flag deprecated types (see below)
Schema Type Status (as of Feb 2026)
Read references/schema-types.md for the full list. Key rules:
ACTIVE (recommend freely):
Organization, LocalBusiness, SoftwareApplication, WebApplication, Product (with Certification markup as of April 2025), ProductGroup, Offer, Service, Article, BlogPosting, NewsArticle, Review, AggregateRating, BreadcrumbList, WebSite, WebPage, Person, ProfilePage, ContactPage, VideoObject, ImageObject, Event, JobPosting, Course, DiscussionForumPosting
VIDEO & SPECIALIZED (recommend freely):
BroadcastEvent, Clip, SeekToAction, SoftwareSourceCode
See schema/templates.json for ready-to-use JSON-LD templates for these types.
JSON-LD and JavaScript rendering: Per Google's December 2025 JS SEO guidance, structured data injected via JavaScript may face delayed processing. For time-sensitive markup (especially Product, Offer), include JSON-LD in the initial server-rendered HTML.
RESTRICTED (only for specific sites):
- FAQ: ONLY for government and healthcare authority sites (restricted Aug 2023)
DEPRECATED (never recommend):
- HowTo: Rich results removed September 2023
- SpecialAnnouncement: Deprecated July 31, 2025
- CourseInfo, EstimatedSalary, LearningVideo: Retired June 2025
- ClaimReview: Retired from rich results June 2025
- VehicleListing: Retired from rich results June 2025
- Practice Problem: Retired from rich results late 2025
- Dataset: Retired from rich results late 2025
- Book Actions: Deprecated then reversed, still functional as of Feb 2026 (historical note)
Generation
When generating schema for a page: 1. Identify page type from content analysis 2. Select appropriate schema type(s) 3. Generate valid JSON-LD with all required + recommended properties 4. Include only truthful, verifiable data. Use placeholders clearly marked for user to fill 5. Validate output before presenting
Common Schema Templates
Organization
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "[Company Name]",
"url": "[Website URL]",
"logo": "[Logo URL]",
"contactPoint": {
"@type": "ContactPoint",
"telephone": "[Phone]",
"contactType": "customer service"
},
"sameAs": [
"[Facebook URL]",
"[LinkedIn URL]",
"[Twitter URL]"
]
}LocalBusiness
{
"@context": "https://schema.org",
"@type": "LocalBusiness",
"name": "[Business Name]",
"address": {
"@type": "PostalAddress",
"streetAddress": "[Street]",
"addressLocality": "[City]",
"addressRegion": "[State]",
"postalCode": "[ZIP]",
"addressCountry": "US"
},
"telephone": "[Phone]",
"openingHours": "Mo-Fr 09:00-17:00",
"geo": {
"@type": "GeoCoordinates",
"latitude": "[Lat]",
"longitude": "[Long]"
}
}Article/BlogPosting
{
"@context": "https://schema.org",
"@type": "Article",
"headline": "[Title]",
"author": {
"@type": "Person",
"name": "[Author Name]"
},
"datePublished": "[YYYY-MM-DD]",
"dateModified": "[YYYY-MM-DD]",
"image": "[Image URL]",
"publisher": {
"@type": "Organization",
"name": "[Publisher]",
"logo": {
"@type": "ImageObject",
"url": "[Logo URL]"
}
}
}Output
SCHEMA-REPORT.md: detection and validation resultsgenerated-schema.json: ready-to-use JSON-LD snippets
Validation Results
| Schema | Type | Status | Issues |
|---|---|---|---|
| ... | ... | ✅/⚠️/❌ | ... |
Recommendations
- Missing schema opportunities
- Validation fixes needed
- Generated code for implementation
Error Handling
| Scenario | Action |
|---|---|
| URL unreachable | Report connection error with status code. Suggest verifying URL and checking if the page requires authentication. |
| No schema markup found | Report that no JSON-LD, Microdata, or RDFa was detected. Recommend appropriate schema types based on page content analysis. |
| Invalid JSON-LD syntax | Parse and report specific syntax errors (missing brackets, trailing commas, unquoted keys). Provide corrected JSON-LD output. |
| Deprecated schema type detected | Flag the deprecated type with its retirement date. Recommend the current replacement type or advise removal if no replacement exists. |
Write to shared data cache
After completing all work, write a concise JSON summary to .seo-cache/ when the workflow produced durable findings. Use the schemas and naming rules in ../seo/references/shared-data-cache.md; include at least cache_type, analyzed_at, source URL/domain, key findings, issues, recommendations, and tool limitations. Add .seo-cache/ to .gitignore if it is missing.
MIT License - see repository root LICENSE file for complete terms.
Copyright (c) 2026 AgriciDaniel
https://github.com/AgriciDaniel/codex-seo
Related skills
FAQ
Which structured-data format does seo-schema recommend?
JSON-LD, which it treats as the primary format per Google's stated preference.
Does it warn about deprecated schema types?
Yes. It flags deprecated types like HowTo and SpecialAnnouncement and restricts FAQ to government and healthcare authority sites.