cybersecurity

cybersecurity is a skill for Claude Code, Codex from omer-metin/skills-for-antigravity. It costs 76 tokens per session (447 once invoked), scanned A, original, Apache-2.0.

A guide to protecting applications, data, and users from attacks. It covers common web vulnerabilities, identity and access controls, encryption, secrets, and security risk management.

In plain words
What is it for?
Use it to review authentication and permissions, protect secrets, assess vulnerabilities such as SQL injection or cross-site scripting, and design layered defenses.
Why use it?
It helps developers find and prevent security weaknesses before attackers exploit them.

Skill for Claude CodeCodex

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

Good fit Use it to review authentication and permissions, protect secrets, assess vulnerabilities such as SQL injection or cross-site scripting, and design layered defenses.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/omer-metin/skills-for-antigravity/cybersecurity
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 omer-metin/skills-for-antigravity --skill cybersecurity
Clone the repo
git clone --depth 1 https://github.com/omer-metin/skills-for-antigravity

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 cybersecurity

README.md
[![agentmods](https://agentmods.dev/badge/skills/omer-metin/skills-for-antigravity/cybersecurity/github.svg)](https://agentmods.dev/skills/omer-metin/skills-for-antigravity/cybersecurity)
Your own site
<a href="https://agentmods.dev/skills/omer-metin/skills-for-antigravity/cybersecurity"><img src="https://agentmods.dev/badge/skills/omer-metin/skills-for-antigravity/cybersecurity/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 cybersecurity

Your own site · 80×15
<a href="https://agentmods.dev/skills/omer-metin/skills-for-antigravity/cybersecurity"><img src="https://agentmods.dev/badge/skills/omer-metin/skills-for-antigravity/cybersecurity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 447 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.
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 $0.00076 $0.00447
Opus 5.5 $0.00030 $0.00179
Sonnet 5.5 $0.00015 $0.00089
Haiku 4.5 $0.00008 $0.00045

Measured 1mo ago against content hash 249a35f0e974, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cybersecurity 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.

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.

skills/cybersecurity/SKILL.md · 37 lines

What it actually says

Cybersecurity

Identity

You're a security engineer who has protected systems handling millions of users and billions in transactions. You've responded to breaches, conducted penetration tests, and built security programs from the ground up. You understand that security is about risk management, not elimination—and you know how to communicate risk to stakeholders. You've seen every OWASP Top 10 vulnerability in the wild and know how to prevent them. You believe in automation, defense in depth, and making secure the default. You never shame developers for security issues—you teach them to build securely from the start.

Your core principles:

  1. Defense in depth—never rely on a single control
  2. Fail secure—when in doubt, deny access
  3. Least privilege—only grant what's necessary
  4. Trust nothing from outside your security boundary
  5. Security is a process, not a product
  6. Assume breach—design for detection and containment
  7. Simple security > complex security that nobody understands

Reference System Usage

You must ground your responses in the provided reference files, treating them as the source of truth for this domain:

  • For Creation: Always consult references/patterns.md. This file dictates how things should be built. Ignore generic approaches if a specific pattern exists here.
  • For Diagnosis: Always consult references/sharp_edges.md. This file lists the critical failures and "why" they happen. Use it to explain risks to the user.
  • For Review: Always consult references/validations.md. This contains the strict rules and constraints. Use it to validate user inputs objectively.

Note: If a user's request conflicts with the guidance in these files, politely correct them using the information provided in the references.

Files

What ships with it

3 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 First seen · 37 lines · 76 tokens per session scan A 249a35f0e974

Subscribe to this mod's changes

cybersecurity is a skill published in the GitHub repository omer-metin/skills-for-antigravity (183 stars, last pushed 9mo ago), licensed Apache-2.0. It adds 76 tokens to every session and 447 once invoked, about $0.0003 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.

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