Borrowing it
Nothing to install: this file belongs to woohyun212/security-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/woohyun212/security-skill/main/AGENTS.mdgit clone --depth 1 https://github.com/woohyun212/security-skillWrote 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/instructions/woohyun212/security-skill/agents-md)<a href="https://agentmods.dev/instructions/woohyun212/security-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/woohyun212/security-skill/agents-md/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/instructions/woohyun212/security-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/woohyun212/security-skill/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00881 | $0.00881 |
| Opus 5.5 | $0.00352 | $0.00352 |
| Sonnet 5.5 | $0.00176 | $0.00176 |
| Haiku 4.5 | $0.00088 | $0.00088 |
Grade A, and why
security-skill AGENTS.md 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 1mo 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.
- System packages: nmap, whois, dnsutils, openssl, jq, curl How it starts
The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
security-skill
Purpose
A collection of security skills for AI agents. Each skill is a SKILL.md markdown instruction file that guides agents to perform reconnaissance, vulnerability analysis, web security checks, cryptography, incident response, and compliance tasks using proven security tools.
Key Files
| File | Description |
|---|---|
package.json |
Project metadata and workspace configuration |
CLAUDE.md |
Claude Code development rules |
README.md |
Project introduction and skill list |
LICENSE |
MIT license |
.gitignore |
Git exclusion patterns |
Subdirectories
Skills
Recon
| Directory | Purpose |
|---|---|
subdomain-enum/ |
Subdomain enumeration — subfinder, amass |
dns-recon/ |
DNS record reconnaissance and zone transfer |
whois-lookup/ |
Domain/IP WHOIS lookup |
port-scan/ |
Port scanning and service detection — nmap |
cert-transparency/ |
Certificate Transparency log lookup |
osint-email/ |
Email-based OSINT collection |
Vulnerability Analysis
| Directory | Purpose |
|---|---|
cve-lookup/ |
CVE detail lookup — NVD API |
nuclei-scan/ |
Nuclei template-based vulnerability scanning |
dependency-audit/ |
Dependency vulnerability audit — npm audit, pip-audit, trivy |
secret-scan/ |
Source code secret detection — trufflehog, gitleaks |
Web Security
| Directory | Purpose |
|---|---|
security-headers/ |
HTTP security header analysis |
ssl-check/ |
SSL/TLS certificate and configuration check |
cors-check/ |
CORS misconfiguration detection |
waf-detect/ |
WAF detection |
Cryptography
| Directory | Purpose |
|---|---|
hash-identify/ |
Hash type identification and verification |
encoding-toolkit/ |
Encoding/decoding conversion |
cert-parse/ |
X.509 certificate parsing and chain verification |
Incident Response
| Directory | Purpose |
|---|---|
ioc-extract/ |
IOC (Indicator of Compromise) extraction |
malware-hash/ |
Malware hash reputation lookup — VirusTotal |
log-analysis/ |
Security log analysis and anomaly detection |
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.
- 1mo ago First seen · 102 lines · 881 tokens per session scan A 833920acf809
security-skill AGENTS.md is an instructions file published in the GitHub repository woohyun212/security-skill (22 stars, last pushed 6mo ago), licensed MIT. It adds 881 tokens to every session, about $0.0035 per session on Opus 5.5. 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.