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 adriannoes/awesome-agentic-ai --skill detecting-typosquatting-packagesgit clone --depth 1 https://github.com/adriannoes/awesome-agentic-aiWrote 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/adriannoes/awesome-agentic-ai/detecting-typosquatting-packages)<a href="https://agentmods.dev/skills/adriannoes/awesome-agentic-ai/detecting-typosquatting-packages"><img src="https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/detecting-typosquatting-packages/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/adriannoes/awesome-agentic-ai/detecting-typosquatting-packages"><img src="https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/detecting-typosquatting-packages.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
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 →
- medium Data Exfiltration · line 163 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00066 | $0.02950 |
| Opus 5 | $0.00033 | $0.01475 |
| Sonnet 5 | $0.00013 | $0.00590 |
| Haiku 4.5 | $0.00007 | $0.00295 |
Grade A, and why
detecting-typosquatting-packages 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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s https://hugovk.github.io/top-pypi-packages/top-pypi-packages.min.json \ How it starts
The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Detecting Typosquatting Packages
Authorized Use Only: This skill is for defensive software-supply-chain security, package screening, and authorized research. Use the corpus-matching and registry-query techniques here only against registries you are permitted to query at scale and packages you intend to evaluate for your own organization. Mass automated registry scraping may violate registry terms of service.
Overview
Typosquatting is a software-supply-chain attack (MITRE ATT&CK T1195.002 — Supply Chain Compromise: Compromise Software Supply Chain) in which an adversary publishes a malicious package whose name is a near-miss of a popular legitimate package — reqeusts for requests, python-sqlite for sqlite3, crossenv for cross-env. A developer who fat-fingers the name, copies a name from a poisoned tutorial, or trusts an AI-generated dependency list (the "slopsquatting" variant, where models hallucinate package names attackers then register) installs the squat instead. Because most ecosystems execute install-time scripts (postinstall in npm, setup.py/build hooks in PyPI), the payload runs immediately with the developer's privileges.
This skill covers proactive, pre-installation detection: screening a candidate package name against a corpus of popular/known-good names using the same name-mutation primitives attackers use, then triaging high-risk matches. The canonical open-source detector is typomania (Rust Foundation), a Rust port of the academic typogard tool ("Defending Against Package Typosquatting", University of Kansas); typomania powers crates.io's live typosquatting checks. Cross-ecosystem coverage comes from Microsoft OSSGadget's oss-find-squats and, for PyPI, IQTLabs pypi-scan. The ecosyste-ms typosquatting-dataset provides a curated ground-truth corpus of known squats mapped to their legitimate targets.
Sources: Rust Foundation typomania (https://github.com/rustfoundation/typomania), Microsoft OSSGadget, ecosyste-ms typosquatting-dataset, and OWASP CI/CD / SLSA supply-chain guidance.
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 · 231 lines · 66 tokens per session scan A ed5b6eb14f33
detecting-typosquatting-packages is a skill published in the GitHub repository adriannoes/awesome-agentic-ai (57 stars, last pushed 14d ago), licensed MIT. It adds 66 tokens to every session and 2,950 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 2026-09-03.
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