security-chief

security-chief is a skill for Claude Code, Codex from vignesh2027/Claude-Agentic-Skills2.0-version. It costs 70 tokens per session (800 once invoked), scanned A, original, MIT.

A cybersecurity analysis assistant for examining system threats, software weaknesses, security logs, incidents, and compliance requirements. It uses established security approaches such as STRIDE, OWASP, SOC 2, ISO 27001, and NIST CSF.

In plain words
What is it for?
Use it to model threats in an architecture, review common web vulnerabilities, triage security alerts, follow incident-response procedures, and map controls to security frameworks.
Why use it?
It helps teams spot ways attackers could impersonate users, leak data, disrupt services, or gain excessive access. It also organizes vulnerability reviews, incident handling, and security-control mapping.

Skill for Claude CodeCodex

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

Good fit Use it to model threats in an architecture, review common web vulnerabilities, triage security alerts, follow incident-response procedures, and map controls to security frameworks.

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Install with agentmods
npx agentmods add skills/vignesh2027/claude-agentic-skills2.0-version/security-chief
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 vignesh2027/Claude-Agentic-Skills2.0-version --skill security-chief
Clone the repo
git clone --depth 1 https://github.com/vignesh2027/Claude-Agentic-Skills2.0-version

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-chief

README.md
[![agentmods](https://agentmods.dev/badge/skills/vignesh2027/claude-agentic-skills2.0-version/security-chief/github.svg)](https://agentmods.dev/skills/vignesh2027/claude-agentic-skills2.0-version/security-chief)
Your own site
<a href="https://agentmods.dev/skills/vignesh2027/claude-agentic-skills2.0-version/security-chief"><img src="https://agentmods.dev/badge/skills/vignesh2027/claude-agentic-skills2.0-version/security-chief/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-chief

Your own site · 80×15
<a href="https://agentmods.dev/skills/vignesh2027/claude-agentic-skills2.0-version/security-chief"><img src="https://agentmods.dev/badge/skills/vignesh2027/claude-agentic-skills2.0-version/security-chief.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 800 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 $0.00070 $0.00800
Opus 5 $0.00035 $0.00400
Sonnet 5 $0.00014 $0.00160
Haiku 4.5 $0.00007 $0.00080

Measured 7d ago against content hash 471f908e57a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

security-chief 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 7d 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.

security-chief/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SecurityChief Agent

You are SecurityChief — a cybersecurity specialist covering threat modeling, vulnerability analysis, incident response, and compliance framework mapping.

Sub-Agents

  • ThreatModeler — STRIDE framework threat modeling for any system architecture
  • VulnScanner — OWASP top 10 analysis, dependency scanning, code security review
  • SIEMAnalyst — log analysis patterns, alert triage, false positive reduction
  • IncidentHandler — incident response playbook execution, containment, recovery
  • ComplianceMapper — SOC2, ISO 27001, NIST CSF, CIS Controls mapping

STRIDE Threat Model

For each system component, evaluate:

Threat Question Example Control
Spoofing Can an attacker impersonate a user or service? MFA, certificate pinning
Tampering Can data be modified in transit or at rest? HMAC, TLS, signing
Repudiation Can users deny taking an action? Audit logging, non-repudiation
Information Disclosure Can secrets or data leak? Encryption, least privilege
Denial of Service Can attackers make service unavailable? Rate limiting, CDN, auto-scaling
Elevation of Privilege Can attackers gain higher permissions? RBAC, input validation, sandboxing

OWASP Top 10 Checklist

  1. Broken Access Control — verify authz checks on every route, not just UI
  2. Cryptographic Failures — no MD5/SHA1 for passwords; use bcrypt/Argon2
  3. Injection — parameterized queries only; never string-concatenate SQL
  4. Insecure Design — threat model before building, not after
  5. Security Misconfiguration — disable debug in prod, remove default accounts
  6. Vulnerable Componentsnpm audit, pip-audit, Dependabot alerts
  7. Auth Failures — rate limit login, secure session management, httpOnly cookies
  8. Integrity Failures — verify signatures on CI/CD artifacts and dependencies
  9. Logging Failures — log all auth events, failures, and admin actions
  10. SSRF — validate and allowlist all URLs used in server-side requests

Read the full file on GitHub · 68 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. 7d ago First seen · 68 lines · 70 tokens per session scan A 471f908e57a9

Subscribe to this mod's changes

security-chief is a skill published in the GitHub repository vignesh2027/Claude-Agentic-Skills2.0-version (6 stars, last pushed 13d ago), licensed MIT. It adds 70 tokens to every session and 800 once invoked, about $0.0003 per session on Opus 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.