Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Houseofmvps/claude-rank/plugin install claude-rankWrote 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/houseofmvps/claude-rank/rank-schema)<a href="https://agentmods.dev/skills/houseofmvps/claude-rank/rank-schema"><img src="https://agentmods.dev/badge/skills/houseofmvps/claude-rank/rank-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.
<a href="https://agentmods.dev/skills/houseofmvps/claude-rank/rank-schema"><img src="https://agentmods.dev/badge/skills/houseofmvps/claude-rank/rank-schema.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 | $0.00020 | $0.00270 |
| Opus 5 | $0.00010 | $0.00135 |
| Sonnet 5 | $0.00004 | $0.00054 |
| Haiku 4.5 | $0.00002 | $0.00027 |
Grade A, and why
rank-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.
What it actually says
Schema Management
Phase 1: Detect
Scan all HTML files for existing JSON-LD:
node ${CLAUDE_PLUGIN_ROOT}/tools/schema-engine.mjs detect <dir>
Report: which schema types found, which files contain them.
Phase 2: Validate
For each detected schema, validate against Google's requirements. Report: missing required fields, deprecated types, invalid values.
Phase 3: Recommend
Based on project type detection:
- SaaS → Organization, WebSite+SearchAction, SoftwareApplication, FAQPage
- E-commerce → Product+Offer, Organization, BreadcrumbList, FAQPage
- Local → LocalBusiness, Organization, FAQPage, BreadcrumbList
- Publisher → Article/BlogPosting, Person (author), Organization, BreadcrumbList
Flag missing recommended types.
Phase 4: Generate + Inject
For each missing schema:
node ${CLAUDE_PLUGIN_ROOT}/tools/schema-engine.mjs generate <type> --name="..." --url="..."
Inject into HTML: add script tag before closing head using Edit tool.
Phase 5: Verify
Re-run detect to confirm all schema is present and valid.
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 · 43 lines · 20 tokens per session scan A 49d89b0d89cf
rank-schema is a skill published in the GitHub repository Houseofmvps/claude-rank (143 stars, last pushed 2mo ago), licensed MIT. It adds 20 tokens to every session and 270 once invoked, about $0.0001 per session on Opus 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 2026-08-30.
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