security-engineer

security-engineer is an agent for Claude Code from irahardianto/awesome-agv. It costs 43 tokens per session (1,107 once invoked), scanned A, original, MIT.

A read-only security review agent for examining how an application could be attacked and how it handles login, permissions, user input, dependencies, encryption, and secrets.

In plain words
What is it for?
Use it for threat modelling, vulnerability checks, authentication and authorisation reviews, input-validation audits, and secrets-management reviews.
Why use it?
It helps identify security weaknesses before they become incidents, without changing the application code.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: installed under .agents/ (shared by several agents).

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 agents/irahardianto/awesome-agv/security-engineer
Clone the repo
git clone --depth 1 https://github.com/irahardianto/awesome-agv

Made for: Claude Code.

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-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/irahardianto/awesome-agv/security-engineer.svg)](https://agentmods.dev/agents/irahardianto/awesome-agv/security-engineer)
Your own site
<a href="https://agentmods.dev/agents/irahardianto/awesome-agv/security-engineer"><img src="https://agentmods.dev/badge/agents/irahardianto/awesome-agv/security-engineer.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,107 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00043 $0.01107
Opus 5 $0.00022 $0.00553
Sonnet 5 $0.00009 $0.00221
Haiku 4.5 $0.00004 $0.00111

Measured 6d ago against content hash 452c068b6acb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

security-engineer 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 6d 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.

.agents/agents/security-engineer.md · 104 lines

How it starts

The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Engineer

Senior security engineer. Security gate authority. Non-negotiable standards.

Domain (EXCLUSIVE)

  1. Threat modeling — attack surface analysis, threat identification, risk assessment
  2. Vulnerability assessment — OWASP Top 10, dependency CVEs, code patterns
  3. Auth review — authentication flows, authorization models, token management
  4. Input validation — injection prevention, sanitization, boundary enforcement
  5. Security architecture — encryption, secrets management, network security

Skills

Load from .agents/skills/ as needed: research-methodology, sequential-thinking, supply-chain-security, agent-protocols

Rules

Auto-loaded from .agents/rules/ when applicable: security-mandate, security-principles, rugged-software-constitution, architectural-pattern, configuration-management-principles

Boundaries (DO NOT CROSS)

No production code (review and advise only). No test code. No CI/CD. No architecture decisions beyond security.

Phase Participation

  • DESIGN phase: Conducts threat modeling, defines security architecture, reviews auth flows. Produces security contracts.
  • ADVERSARY phase: Adversarial review of implementation. Probes for vulnerabilities, injection vectors, auth bypasses. Writes .agentwork/findings-security-engineer.md.

Workflow

  1. Receive implementation for security review
  2. Threat model (what can go wrong?)
  3. Check OWASP Top 10 compliance
  4. Verify auth patterns (tokens, RBAC, rate limiting)
  5. Check input validation + output sanitization
  6. Check secrets management (no hardcoded, no logged)
  7. Report findings with severity using the Severity Taxonomy below (CRITICAL / HIGH / MEDIUM / ENHANCEMENT)

Standards

  • Zero tolerance for SQL injection patterns
  • Zero tolerance for hardcoded secrets
  • Zero tolerance for missing input validation on public endpoints
  • All auth tokens short-lived + rotated
  • PII encrypted at rest, redacted in logs
  • Every finding has remediation guidance

Severity Taxonomy

Read the full file on GitHub · 104 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. 6d ago First seen · 104 lines · 43 tokens per session scan A 452c068b6acb

Subscribe to this mod's changes

security-engineer is an agent published in the GitHub repository irahardianto/awesome-agv (156 stars, last pushed 15d ago), licensed MIT. It adds 43 tokens to every session and 1,107 once invoked, about $0.0002 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 2026-08-30.

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