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 agentmods add skills/kevinaimonster/skill-hub/database-designnpx skills add kevinaimonster/skill-hub --skill database-designgit clone --depth 1 https://github.com/kevinaimonster/skill-hubWrote 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/kevinaimonster/skill-hub/database-design)<a href="https://agentmods.dev/skills/kevinaimonster/skill-hub/database-design"><img src="https://agentmods.dev/badge/skills/kevinaimonster/skill-hub/database-design.svg" alt="Measured on agentmods" 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 | $0.00165 | $0.02317 |
| Opus 5 | $0.00082 | $0.01158 |
| Sonnet 5 | $0.00033 | $0.00463 |
| Haiku 4.5 | $0.00016 | $0.00232 |
Grade C, and why
database-design scanned grade C with 1 finding 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 4d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
``` [用户] 1 ──── N [订单] │ │ │ N │ [订单项] N ──── 1 [商品] │ N [地址] ``` ### 实体关系说明 | 关系 | 类型 | 说明 | |------|------|------| | 用户-订单 | 一对多 | 一个用户可以有多个订单 | | 订单-订单项 | 一对多 | 一个订单包含多个商品项 | | 订单项-商品 | 多对一 | 多个订单项关联同一个商品 | ### DDL The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 4d ago First seen · 255 lines · 165 tokens per session scan C 566d783bea79
database-design is a skill published in the GitHub repository kevinaimonster/skill-hub (3 stars, last pushed 5mo ago), with no licence file. It adds 165 tokens to every session and 2,317 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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