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.
npx skills add s0vers/next-app-i18n-starter --skill nextjs-seo-structured-datagit clone --depth 1 https://github.com/s0vers/next-app-i18n-starterWrote 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.
[](https://agentmods.dev/skills/s0vers/next-app-i18n-starter/nextjs-seo-structured-data)<a href="https://agentmods.dev/skills/s0vers/next-app-i18n-starter/nextjs-seo-structured-data"><img src="https://agentmods.dev/badge/skills/s0vers/next-app-i18n-starter/nextjs-seo-structured-data/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.
<a href="https://agentmods.dev/skills/s0vers/next-app-i18n-starter/nextjs-seo-structured-data"><img src="https://agentmods.dev/badge/skills/s0vers/next-app-i18n-starter/nextjs-seo-structured-data.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00100 | $0.00954 |
| Opus 5.5 | $0.00040 | $0.00382 |
| Sonnet 5.5 | $0.00020 | $0.00191 |
| Haiku 4.5 | $0.00010 | $0.00095 |
Grade A, and why
nextjs-seo-structured-data 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 16d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- nextjs-seo-technical — 86% identical, 37 lines differ
How it starts
The opening of the file, as written. The whole thing — 43 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Structured data for Next.js
Markup describes what the page shows. It does not rank a page and does not guarantee a rich result. Google says AI Overviews and AI Mode need no special markup.
Read
| Task | Reference |
|---|---|
| Which type for a page, supported versus removed features, Product and Offer fields, the JSON-LD pattern, verification | Structured data |
Rules
- Every value is visible on the page, or comes from the same data as the visible value. Hidden or mismatched markup breaks Google's policy. [doc]
- Google's gallery changes without notice. Open the current search gallery before claiming a feature. [doc]
- Render JSON-LD in a Server Component with a native
<script type="application/ld+json">, serialized withJSON.stringify(data).replace(/</g, "\\u003c"). [doc] - Localize every string in the markup with the page's content, because markup in another language than the visible text no longer describes what the page shows. [doc]
- Never add FAQ markup for a rich result. Google removed FAQ rich results in May 2026. [doc]
- Never put
Productmarkup on a category page. UseBreadcrumbList. [doc]
Working method
- Orient. Read the root
AGENTS.mdif the project has one, the route and its rendered output, and the file that builds page metadata. Never read.env. Done when you can name that file. - Frame. Write the URL set, page type, locale or market, and target outcome, one line each. Ask only when an answer changes the work, and state the default you will use if nobody answers. Done when all four lines exist and every open question is asked or carries a stated default.
- Change and verify. Make the smallest change with the project's own helpers. When a server is running and the
nextjs-seo-technicalskill is installed, run itsscripts/verify-seo.mjs(in this starter:bun run seo:verify), then the project's lint and build. Done when every check ends in one of the four verdicts below. - Report, in the shape below.
What ships with it
2 files 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.
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.
- 16d ago First seen · 43 lines · 100 tokens per session scan A 880555142b5f
nextjs-seo-structured-data is a skill published in the GitHub repository s0vers/next-app-i18n-starter (66 stars, last pushed 6d ago), licensed MIT. It adds 100 tokens to every session and 954 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-09-30.
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