vulnerability-patterns

vulnerability-patterns is a skill for Claude Code, Codex from drvoss/harness-100-copilot. It costs 58 tokens per session (936 once invoked), scanned A, original, no licence file.

A reference library for reviewing code for security weaknesses, organised by CWE, a standard list of common software vulnerability types.

In plain words
What is it for?
Use it during security reviews to check language-specific risks, classify findings, and choose safer code alternatives.
Why use it?
It helps reviewers recognise known attack patterns and avoid suggesting unsafe fixes.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/drvoss/harness-100-copilot/vulnerability-patterns
Any agent
npx skills add drvoss/harness-100-copilot --skill vulnerability-patterns
Clone the repo
git clone --depth 1 https://github.com/drvoss/harness-100-copilot

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 vulnerability-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/drvoss/harness-100-copilot/vulnerability-patterns.svg)](https://agentmods.dev/skills/drvoss/harness-100-copilot/vulnerability-patterns)
Your own site
<a href="https://agentmods.dev/skills/drvoss/harness-100-copilot/vulnerability-patterns"><img src="https://agentmods.dev/badge/skills/drvoss/harness-100-copilot/vulnerability-patterns.svg" alt="Measured on agentmods" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 936 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00058 $0.00936
Opus 5 $0.00029 $0.00468
Sonnet 5 $0.00012 $0.00187
Haiku 4.5 $0.00006 $0.00094

Measured 5d ago against content hash d848d27c3f50, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vulnerability-patterns 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 5d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

os.system(f"ls {user_path}")
harnesses/21-code-reviewer/skills/vulnerability-patterns/SKILL.md · 107 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 5d ago First seen · 107 lines · 58 tokens per session scan A d848d27c3f50

Subscribe to this mod's changes

vulnerability-patterns is a skill published in the GitHub repository drvoss/harness-100-copilot (5 stars, last pushed 3mo ago), with no licence file. It adds 58 tokens to every session and 936 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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