A skill for finding, checking, and creating Schema.org structured data, usually written as JSON-LD embedded in a web page. This data helps search engines understand page content and may support enhanced search listings.

Use it to inspect JSON-LD, Microdata, or RDFa, validate schema types and properties, and produce recommended structured data.

It helps catch missing fields, invalid values, placeholder text, bad URLs, and other markup problems that can prevent correct interpretation.

How niclejeune/pi-agents-config configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to niclejeune/pi-agents-config. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/niclejeune/pi-agents-config/main/.pi/agent/skills/seo-schema/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/niclejeune/pi-agents-config

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/niclejeune/pi-agents-config/seo-schema/github.svg)](https://agentmods.dev/skills/niclejeune/pi-agents-config/seo-schema)

Your own site

<a href="https://agentmods.dev/skills/niclejeune/pi-agents-config/seo-schema"><img src="https://agentmods.dev/badge/skills/niclejeune/pi-agents-config/seo-schema/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/niclejeune/pi-agents-config/seo-schema"><img src="https://agentmods.dev/badge/skills/niclejeune/pi-agents-config/seo-schema.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,118 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 92% copy Near-identical to another mod 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	$0.00044	$0.01118
Opus 5	$0.00022	$0.00559
Sonnet 5	$0.00009	$0.00224
Haiku 4.5	$0.00004	$0.00112

Measured 12d ago against content hash 38c5f9bef3d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-schema 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 12d 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.

Origin

This is a copy

92% identical to seo-schema — 32 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.pi/agent/skills/seo-schema/SKILL.md · 152 lines

How it starts

The opening of the file, as written. The whole thing — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Schema Markup Analysis & Generation

Detection

Scan page source for JSON-LD <script type="application/ld+json">
Check for Microdata (itemscope, itemprop)
Check for RDFa (typeof, property)
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)

Read the full file on GitHub · 152 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.

12d ago First seen · 152 lines · 44 tokens per session scan A 38c5f9bef3d8

Subscribe to this mod's changes

seo-schema is a skill published in the GitHub repository niclejeune/pi-agents-config (1 stars, last pushed 4mo ago), licensed MIT. It adds 44 tokens to every session and 1,118 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to seo-schema, differing in 32 lines, and is treated as a copy.

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pi-agents-config: Skill for Claude Code