behavioral-analysis

behavioral-analysis is a skill for Claude Code, Codex from HuTa0kj/vetix. It costs 65 tokens per session (1,442 once invoked), scanned C, original, MIT.

A security-review skill for examining add-ons in an AI agent and MCP catalogue. It looks for instructions or code paths that could harm a computer, expose data, or give an attacker access.

In plain words
What is it for?
Use it to audit skills for command injection, data leakage, unauthorized access, remote execution, resource misuse, and other security risks.
Why use it?
It helps catalogue maintainers identify dangerous add-ons before users rely on them. Its review focuses on whether instructions can lead to actual harmful actions on a host system.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to audit skills for command injection, data leakage, unauthorized access, remote execution, resource misuse, and other security risks.

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Install with agentmods
npx agentmods add skills/huta0kj/vetix/behavioral-analysis
Install

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.

Any agent
npx skills add HuTa0kj/vetix --skill behavioral-analysis
Clone the repo
git clone --depth 1 https://github.com/HuTa0kj/vetix

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for behavioral-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/huta0kj/vetix/behavioral-analysis.svg)](https://agentmods.dev/skills/huta0kj/vetix/behavioral-analysis)
Your own site
<a href="https://agentmods.dev/skills/huta0kj/vetix/behavioral-analysis"><img src="https://agentmods.dev/badge/skills/huta0kj/vetix/behavioral-analysis.svg" alt="Measured on agentmods" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,442 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 3 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00065 $0.01442
Opus 5 $0.00032 $0.00721
Sonnet 5 $0.00013 $0.00288
Haiku 4.5 $0.00006 $0.00144

Measured 8d ago against content hash 3cc7dd5b6762, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade C, and why

behavioral-analysis scanned grade C with 3 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 8d 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.

Downloads and executes remote codemediumSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

| `critical` | Direct damage (rm -rf /, disk wiping), remote code execution (curl \| sh), reverse shell, known malicious IOC (C2 IP/domain/hash) |

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

| `critical` | Direct damage (rm -rf /, disk wiping), remote code execution (curl \| sh), reverse shell, known malicious IOC (C2 IP/domain/hash) |

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

2. **Belongs to the normal legitimate function of the skill:** Such as `requests.post` in a legitimate API client, or `curl` usage shown in the documentation with a "Do not execute" context.
vetix/skills/behavioral-analysis/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Security Scanner

You are a security scanner for the AI Agent Skill catalog. Your task is to analyze the SKILL catalog and identify potential security risks.

Core Judgment Axioms

Sole Judgment Criterion: When a large model loads this skill, will it cause harm to the user's host machine?

  • All findings, classifications, and severity levels must answer this question.

  • No executable "hazard path" found → No risk, no matter how suspicious the code looks.

  • A "hazard path" found → Must be reported, even if a single fragment seems harmless.

  • "Hazard" refers to actual damage to the integrity, availability, and confidentiality of the user's host system: data corruption, unauthorized access, resource hijacking, leakage of sensitive information, attackers gaining execution access, etc.

Execution Chain Thinking

SKILL.md and its referenced scripts and configurations enter the agent's context as instructions. Harms can only occur along the chain of "instruction → agent tool call → host consequences." A break in this chain means no risk.

For each discovery, the following must be answered:

  • Where is the instruction located?: Specific file, line number, code snippet.

  • What will the agent do?: Which tool call is triggered, and what host behavior is generated.

  • What consequences will it cause to the host?: Data corruption/transfer/unauthorized access/persistence/hijacking.

The absence of any one of these three elements constitutes a TP (Transaction Threat).

Starting with SKILL.md

Always start by reading SKILL.md in the target directory. It tells you:

  • What this skill claims to do (legitimate functional baseline—a reference point for judging harm)

  • Which tools/APIs it uses

  • Whether there are external scripts, references, or other files

Based on SKILL.md, form a mental model of the skill's architecture and expected file layout. Distinguish between "claimed to do" and "actually does"—many malicious skills use plausible functional descriptions to mask their true harmful behavior.

Read the full file on GitHub · 117 lines

Changes

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.

  1. 8d ago First seen · 117 lines · 65 tokens per session scan C 3cc7dd5b6762

Subscribe to this mod's changes

behavioral-analysis is a skill published in the GitHub repository HuTa0kj/vetix (61 stars, last pushed 1mo ago), licensed MIT. It adds 65 tokens to every session and 1,442 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 3 findings (downloads and executes remote code, recursive force delete, 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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