agentmods.dev

security

security is a skill for Claude Code, Codex from jnPiyush/AgentX. It costs 49 tokens per session (1,540 once invoked), scanned A, original, Apache-2.0.

A language-independent guide to protecting applications from common security problems, including unsafe input, injection attacks, weak access controls, and exposed secrets.

In plain words
What is it for?
Use it to harden applications, secure user input and database queries, manage secrets, configure HTTPS, and review protections against common web attacks.
Why use it?
It helps reduce vulnerabilities by applying established practices for validation, authentication, authorization, encrypted connections, and credential storage.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **Note**: For language-specific implementations, see [C# Development](../../languages/csharp/SKILL.md) or [Python Development](../../languages/python/SKILL.md)..

not rated 16repo changed 1mo ago A scan SkillSpector: pass 49 tokens original Apache-2.0

Good fit Use it to harden applications, secure user input and database queries, manage secrets, configure HTTPS, and review protections against common web attacks.

Compare 6 skills from other repositories ↓
View source ↗ jnPiyush/AgentX agentx-silk.vercel.app
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/jnPiyush/AgentX
agentmods
npx agentmods add skills/jnpiyush/agentx/security

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 security

README.md
[![agentmods](https://agentmods.dev/badge/skills/jnpiyush/agentx/security/github.svg)](https://agentmods.dev/skills/jnpiyush/agentx/security)
Your own site
<a href="https://agentmods.dev/skills/jnpiyush/agentx/security"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/security/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.

agentmods 80×15 button for security

Your own site · 80×15
<a href="https://agentmods.dev/skills/jnpiyush/agentx/security"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,540 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00049 $0.01540
Opus 5.5 $0.00020 $0.00616
Sonnet 5.5 $0.00010 $0.00308
Haiku 4.5 $0.00005 $0.00154

Measured 1mo ago against content hash f46956579e85, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

security scanned grade A with 0 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 1mo ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/scan-secrets.ps1, scripts/scan-secrets.sh, scripts/scan-security.ps1), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.github/skills/architecture/security/SKILL.md · 152 lines

How it starts

The opening of the file, as written. The whole thing — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security

Purpose: Language-agnostic security practices to protect against common vulnerabilities. Focus: Input validation, injection prevention, authentication, secrets management. Note: For language-specific implementations, see C# Development or Python Development.

When to Use This Skill

  • Hardening applications against OWASP Top 10
  • Implementing authentication and authorization
  • Managing secrets and credentials securely
  • Configuring HTTPS/TLS
  • Conducting security audits

Prerequisites

  • OWASP Top 10 awareness
  • Understanding of HTTP security headers

Decision Tree

Security concern?
+- User input? -> VALIDATE + SANITIZE (see Input Validation)
| +- Goes into SQL? -> Parameterized queries ONLY
| +- Goes into HTML? -> Encode output (XSS prevention)
| - Goes into shell? -> Avoid; use SDK/API instead
+- Authentication?
| +- New system? -> Use established provider (OAuth2/OIDC)
| - Existing? -> Verify token validation, session management
+- Secrets/credentials?
| +- In code? -> REMOVE -> use env vars or vault
| - In config? -> Move to secrets manager
| - Run: scripts/scan-secrets.ps1 to verify
+- Dependencies?
| - Run: scripts/scan-security.ps1 -> update vulnerable packages
- Deployment?
 - HTTPS only, security headers, CORS configured

OWASP Top 10 (2025)

  1. Broken Access Control - Authorization failures, privilege escalation
  2. Cryptographic Failures - Weak encryption, exposed secrets
  3. Injection - SQL, NoSQL, command, LDAP injection
  4. Insecure Design - Missing security controls in architecture
  5. Security Misconfiguration - Default configs, unnecessary features enabled
  6. Vulnerable Components - Outdated dependencies with known CVEs
  7. Authentication Failures - Weak passwords, broken session management
  8. Software/Data Integrity - Unsigned updates, insecure CI/CD
  9. Logging/Monitoring Failures - Missing audit logs, delayed detection
  10. Server-Side Request Forgery (SSRF) - Unvalidated URLs, internal network access

Read the full file on GitHub · 152 lines

Files

What ships with it

6 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.

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. 1mo ago Changed f46956579e85
  2. 1mo ago First seen · 152 lines · 49 tokens per session scan A d2c35611cc3c

Subscribe to this mod's changes

security is a skill published in the GitHub repository jnPiyush/AgentX (16 stars, last pushed 3d ago), licensed Apache-2.0. It adds 49 tokens to every session and 1,540 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Security
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