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 linkfox-ai/linkfox-skills --skill linkfox-ruiguan-utility-patent-detectiongit clone --depth 1 https://github.com/linkfox-ai/linkfox-skillsWrote 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/linkfox-ai/linkfox-skills/linkfox-ruiguan-utility-patent-detection)<a href="https://agentmods.dev/skills/linkfox-ai/linkfox-skills/linkfox-ruiguan-utility-patent-detection"><img src="https://agentmods.dev/badge/skills/linkfox-ai/linkfox-skills/linkfox-ruiguan-utility-patent-detection/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/linkfox-ai/linkfox-skills/linkfox-ruiguan-utility-patent-detection"><img src="https://agentmods.dev/badge/skills/linkfox-ai/linkfox-skills/linkfox-ruiguan-utility-patent-detection.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high System Prompt Leakage · line 88 Skill contains instructions that could directly expose system prompts, internal rules, or hidden instructions to users or external parties.Fix: Remove any instructions that reveal, print, or output system prompts or internal rules. System instructions should never be exposed to end users.
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 | $0.00159 | $0.02119 |
| Opus 5 | $0.00079 | $0.01059 |
| Sonnet 5 | $0.00032 | $0.00424 |
| Haiku 4.5 | $0.00016 | $0.00212 |
Grade A, and why
linkfox-ruiguan-utility-patent-detection 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ruiguan Utility Patent Detection
This skill guides you on how to search for similar utility (invention) patents based on a product's title, description, and target selling region. It helps cross-border e-commerce sellers identify potential patent infringement risks before listing products.
Core Concepts
Utility patent (also called invention patent) protects new and useful inventions or functional improvements. Unlike design patents that protect appearance, utility patents protect how a product works, its structure, or its composition. Infringing on a utility patent can lead to product removal, lawsuits, or TRO orders.
Similarity score: Each returned patent includes a similarity field (0 to 1). A higher value means the patent is more closely related to the queried product. Patents with high similarity scores deserve careful review.
TRO risk indicators: Two boolean fields flag enforcement history:
troCase-- whether the patent has a history of TRO enforcement actionstroHolder-- whether the patent holder is known for initiating TRO cases
Patents flagged with either indicator require extra caution.
Patent validity: The patentValidity field shows whether a patent is Active or Invalid. Only active patents pose infringement risk.
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| productTitle | string | Yes | Product title (max 1000 characters) |
| productDescription | string | Yes | Product description (max 1000 characters) |
| region | string | Yes | Target selling country/region code, comma-separated for multiple. Currently supports: US. Default: US |
| topNumber | integer | Yes | Number of patent results to return. Range: 10--200. Default: 100 |
Parameter Guidelines
- productTitle: Use the product's actual listing title or a concise descriptive title. Be specific rather than generic -- "portable USB-C fast charger 65W" is better than "charger".
- productDescription: Include key features, materials, mechanisms, and technical attributes. The more detail provided, the more accurate the similarity matching.
- region: Currently only
USis supported. Always set toUSunless the user specifies otherwise. - topNumber: Default is 100. Increase to 200 for a broader search when doing thorough patent clearance. Decrease to 10--20 for a quick preliminary scan.
What ships with it
4 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.
- 9d ago First seen · 146 lines · 159 tokens per session scan A 4954e3501f21
linkfox-ruiguan-utility-patent-detection is a skill published in the GitHub repository linkfox-ai/linkfox-skills (101 stars, last pushed 22d ago), licensed MIT. It adds 159 tokens to every session and 2,119 once invoked, about $0.0008 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 2026-09-03.
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