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 LinXiaoTao/FuckClaude --skill detection-signalsgit clone --depth 1 https://github.com/LinXiaoTao/FuckClaudeWrote 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/linxiaotao/fuckclaude/detection-signals)<a href="https://agentmods.dev/skills/linxiaotao/fuckclaude/detection-signals"><img src="https://agentmods.dev/badge/skills/linxiaotao/fuckclaude/detection-signals/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/linxiaotao/fuckclaude/detection-signals"><img src="https://agentmods.dev/badge/skills/linxiaotao/fuckclaude/detection-signals.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00069 | $0.01312 |
| Opus 5 | $0.00034 | $0.00656 |
| Sonnet 5 | $0.00014 | $0.00262 |
| Haiku 4.5 | $0.00007 | $0.00131 |
Grade A, and why
detection-signals scanned grade A 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s "http://localhost:4321/api/check?format=json" \ How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
检测信号(Detection Signals)开发
本项目的核心是一组「中国用户」指纹信号:浏览器端跑扫描动画逐项检测,服务端 /api/check 复用同一批纯评分函数做估算。所有检测只读浏览器 API,零上传。
信号解剖(src/config/signals.ts)
export type SignalId = 'timezone' | /* … */ | 'emoji'; // 先扩展联合类型
interface SignalDef {
id: SignalId;
weight: number; // 所有信号权重之和必须恰好 = 100
claudeUsed?: boolean; // 仅当 Claude Code 真实机制读取该信号时为 true
icon: string; // 内联 SVG(24×24, stroke=currentColor, 复用 ICON 表)
detect: () => DetectOutcome | Promise<DetectOutcome>; // 支持 async(如 UA-CH 高熵值)
}
interface DetectOutcome {
raw: string; // 展示给用户的检测值,如 'Asia/Shanghai'、'none detected'
score: number; // 0..1 的「中国相似度」;≥0.25 记为命中,≥0.6 为 high
}
detect()内部禁止网络请求;异常无需自行兜底,调用方detect.ts已 try/catch。- 探测字体用现成的
isFontAvailable(font, ctx)(canvas 宽度探测)。 - 读 UA-CH 用
uaData()helper;高熵值(model等)需await getHighEntropyValues,拿不到时降级为纯 UA 正则。
新增一个信号的完整清单
- signals.ts
SignalId联合类型加新 id。- 写
detectXxx();若服务端(仅凭请求头)也能测,把纯打分逻辑抽成export function scoreXxx(probe: string)供 API 复用(参照scoreTimezone/scoreLanguages/scoreCnBrowser/scoreCnDevice)。 - 在
SIGNALS数组按权重降序插入,并重新分配权重使总和 = 100。 - 图标加进
ICON表(线性 stroke 风格,与现有一致)。
- i18n/ui.ts(en + zh 两份都要)
- 新增
signal.<id>.name与signal.<id>.desc。 - 以下文案硬编码了信号数量,改动数量时同步更新:
signals.sub(N 项指纹)、how.p2(N-1 项叠加指纹列表)、faq.a2(其余 N-1 项)。
- 新增
- pages/api/check.ts(仅当服务端可测)
analyze()的measuredmap 增加条目,复用第 1 步导出的纯评分函数。- 更新文件头注释与
note里的 browser-only 列表及可测权重数(当前 62/100)。
- layouts/BaseLayout.astro:JSON-LD
featureList追加t('signal.<id>.name')。 - README.md:英文与中文两张「信号与权重」表、API 段落的可测权重描述。
打分约定
- 决定性证据(如系统时区命中中国时区、检出国产厂商字体)→ score 接近 1。
- 全球化品牌 / 弱相关线索(如小米设备、emoji 风格)→ 0.4–0.7,并压低 weight。
- 检不到 / 不适用 →
{ raw: 'none detected', score: 0 },不要抛错。 - 阈值语义:
signalVerdict— ≥0.6 high、≥0.25 medium(命中)、其余 low。
验证(必做)
pnpm build # tsc + astro 构建必须通过
pnpm dev # http://localhost:4321
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.
- 11d ago First seen · 83 lines · 69 tokens per session scan A b528713481eb
detection-signals is a skill published in the GitHub repository LinXiaoTao/FuckClaude (941 stars, last pushed 4d ago), licensed MIT. It adds 69 tokens to every session and 1,312 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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