---
title: Schema Validator Build Time
category: product
entity_type: skill
price: $15
canonical: https://forgehouse.ai/skills/schema-validator-build-time/
lang: en
hreflang_alt: https://forgehouse.ai/tr/skiller/schema-validator-build-time/
last_updated: 2026-06-20
---

# Schema Validator Build Time

> Validate JSON-LD schema markup at build-time with Rich Results API integration, duplicate…

Validates JSON-LD schema markup at build-time and turns your CI/CD pipeline into a deploy gate, so broken structured data never reaches production. It combines schema.org spec compliance, Google Rich Results eligibility checks, and a duplicate-entity detector that catches the multiple-AggregateRating mistake that silently kills star ratings in search. Instead of finding schema errors weeks later in a live audit, you catch them in seconds before merge.

## Use cases
- Add a schema validation gate to a Next.js, Astro, or Nuxt build
- Catch duplicate AggregateRating before it kills your star ratings
- Validate 1000+ pages of multilingual SSG schema in one CI run
- Diagnose why rich results or AI citations stopped appearing
- Enforce a required check on main before merge
- Verify nested Article to Person to Organization @id integrity

## Benefits
- Stop invalid schema from ever reaching production with a hard build-fail
- Recover from costly star-rating loss before it happens, not 4-8 weeks after
- Validate thousands of pages in under a minute via hash-based caching
- Get exact file, line, JSON path, and fix instruction for every error

## What’s included
- Python async validator wrapping Google Rich Results API with retry and rate-limit handling
- Duplicate-entity detector for AggregateRating, Brand, and Logo singletons
- Nested composition validator for author, publisher, and logo @id integrity
- Next.js post-build hook that scans rendered HTML for JSON-LD blocks
- GitHub Actions workflow with CRITICAL/MEDIUM/LOW severity thresholds
- 24-hour SHA256 hash cache for sub-10-second repeat builds

## Who it’s for
For developers and SEO engineers running schema-rich sites who need structured-data errors blocked at build-time rather than discovered live.

## How it runs
The skill is a build-time deploy gate for JSON-LD: it scans the built HTML, validates every schema block against the spec and Google's Rich Results API, hunts duplicate entities and broken nested references, and fails the build on CRITICAL errors before production ever sees them.
1. Hooks into the build: after next build, a post-build script walks the output HTML and extracts every application/ld+json block, and a JSON parse error in a block itself counts as CRITICAL.
2. Checks the cache first: each schema's SHA256 hash maps to a 24 hour cached verdict, so on a 1000 plus page site the second build validates in under 10 seconds with cache hit rates around 85 percent.
3. Validates uncached schemas against the schema.org spec and the Rich Results API with retry and exponential backoff; if the API is unreachable it degrades to spec-only checks instead of failing the whole pipeline.
4. Runs the duplicate entity detector: it walks the entire JSON tree counting singleton types like AggregateRating, and more than one instance returns a CRITICAL error listing the exact JSON paths plus a merge remediation.
5. Validates nested composition: an Article author must be a Person with a name, the publisher must be an Organization with a logo, @id references must resolve, and a missing sameAs is flagged because AI bots need it for entity linking.
6. Applies the severity gate: CRITICAL exits with code 2 and blocks the deploy, MEDIUM logs warnings, LOW becomes a PR comment; the GitHub Actions check is required before anything merges to main.

## FAQ
### We're on Nuxt rather than Next.js, does the deploy gate still apply?
Yes. The validator scans rendered HTML for JSON-LD blocks, so any SSG output works; Next.js, Astro, and Nuxt are the documented setups. The GitHub Actions workflow with CRITICAL/MEDIUM/LOW severity thresholds is framework-agnostic.

### How is this better than pasting pages into the Rich Results Test by hand?
It wraps the same Rich Results checks in an async validator that covers 1000+ pages in one CI run, and adds what the manual tool won't batch: a duplicate-entity detector for the multiple-AggregateRating mistake and nested @id integrity checks. A 24-hour SHA256 hash cache keeps repeat builds under 10 seconds.

### Will it fix the schema errors it finds?
No. It blocks the deploy and reports the exact file, line, JSON path, and a fix instruction for every error, but writing the correction is on you. It's a gate, not an autofixer.

## Price
$15, one-time, no subscription. VAT included.

Related guide: [How to automate SEO and AEO with Claude](https://forgehouse.ai/guides/automate-seo-claude/)