schema-markup-builder

schema-markup-builder is a skill for Claude Code, Codex from aragaobruno/toolbelt. It costs 0 tokens per session (499 once invoked), scanned A, original, MIT.

A utility that creates schema.org JSON-LD, a machine-readable description of a business, organisation, product, or other page for search engines. It is intended for technical SEO, which improves how website content can be understood and displayed in search.

In plain words
What is it for?
Use it to prepare LocalBusiness, organisation, product, or other schema markup for a website. It takes business and URL details and can include custom schema parameters.
Why use it?
It removes the need to hand-write structured-data markup and helps avoid invalid or incomplete JSON-LD.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to prepare LocalBusiness, organisation, product, or other schema markup for a website. It takes business and URL details and can include custom schema parameters.

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Install with agentmods
npx agentmods add skills/aragaobruno/toolbelt/schema-markup-builder
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add aragaobruno/toolbelt --skill schema-markup-builder
Clone the repo
git clone --depth 1 https://github.com/aragaobruno/toolbelt

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.

agentmods badge for schema-markup-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/aragaobruno/toolbelt/schema-markup-builder/github.svg)](https://agentmods.dev/skills/aragaobruno/toolbelt/schema-markup-builder)
Your own site
<a href="https://agentmods.dev/skills/aragaobruno/toolbelt/schema-markup-builder"><img src="https://agentmods.dev/badge/skills/aragaobruno/toolbelt/schema-markup-builder/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.

agentmods 80×15 button for schema-markup-builder

Your own site · 80×15
<a href="https://agentmods.dev/skills/aragaobruno/toolbelt/schema-markup-builder"><img src="https://agentmods.dev/badge/skills/aragaobruno/toolbelt/schema-markup-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 499 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 original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00499
Opus 5 $0.00000 $0.00249
Sonnet 5 $0.00000 $0.00100
Haiku 4.5 $0.00000 $0.00050

Measured 8d ago against content hash 560b993173ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

schema-markup-builder 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 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/builder.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/integration/schema-markup-builder/SKILL.md · 48 lines

What it actually says

🌐 Skill: schema-markup-builder

An automated utility skill to build valid, highly optimized schema.org JSON-LD structured data for technical SEO. Excellent for optimizing Local Business visibility, organizational SEO, and product schema.


🛠️ Triggers

This skill is triggered when an agent or developer needs to generate structured JSON-LD schemas, build SEO markups, or prepare rich snippet scripts for websites.

  • "generate seo schema"
  • "build json-ld schema"
  • "run schema-markup-builder"
  • "create localbusiness schema"

🚀 Usage Guide

Requirements

  • Python (3.10+)
  • google-genai package installed (via uv)
  • A valid GEMINI_API_KEY defined in the environment or in the global .hermes/.env file.

Command Execution

Run the script using uv run from the repository root:

# Basic LocalBusiness schema
uv run --with google-genai skills/integration/schema-markup-builder/scripts/builder.py \
  --business "Bruno's Coffee Shop" \
  --url "https://brunoscoffeeshop.com"

# Custom Schema Type with extra parameters
uv run --with google-genai skills/integration/schema-markup-builder/scripts/builder.py \
  --business "Bruno's Coffee Shop" \
  --url "https://brunoscoffeeshop.com" \
  --type "Cafe" \
  --params '{"telephone": "+1 212-555-0199", "address": {"streetAddress": "123 Main Street", "addressLocality": "New York", "addressRegion": "NY", "postalCode": "10001", "addressCountry": "US"}}' \
  --output "docs/cafe_schema.json"

Options

  • -b, --business: Name of the business (required).
  • -u, --url: Main website URL (required).
  • -t, --type: Schema.org type, e.g., LocalBusiness, HairSalon, Organization, Product (default: LocalBusiness).
  • -p, --params: Path to a JSON file or a raw JSON string containing extra parameters.
  • -o, --output: Target path to save the generated JSON file (default: schema.json).
Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

  1. 8d ago First seen · 48 lines · 0 tokens per session scan A 560b993173ff

Subscribe to this mod's changes

schema-markup-builder is a skill published in the GitHub repository aragaobruno/toolbelt (2 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 499 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.