snr-security-auditor

snr-security-auditor is an agent for Claude Code from Kin9Zeus/senior-engineer-skills. It costs 68 tokens per session (1,091 once invoked), scanned A, original, MIT.

A read-only security reviewer for a codebase or code change. It looks for secrets, permission errors, injection risks, authentication problems, unsafe headers, dependency risks and related weaknesses, then reports locations, fixes and regression tests.

In plain words
What is it for?
Reviewing application code for security problems, documenting confirmed findings, showing where they occur, and suggesting defensive fixes and tests.
Why use it?
It provides a focused security assessment without changing the code or testing systems that the user has not authorised it to assess.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the senior-engineer-skills plugin — 20 skills, 14 commands, 8 agents shipped together

Good fit Reviewing application code for security problems, documenting confirmed findings, showing where they occur, and suggesting defensive fixes and tests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/kin9zeus/senior-engineer-skills/snr-security-auditor
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.

Clone the repo
git clone --depth 1 https://github.com/Kin9Zeus/senior-engineer-skills

Made for: Claude Code.

Or install senior-engineer-skills, the plugin that ships this one along with the rest of its 20 skills, 14 commands, 8 agents.

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 snr-security-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/kin9zeus/senior-engineer-skills/snr-security-auditor/github.svg)](https://agentmods.dev/agents/kin9zeus/senior-engineer-skills/snr-security-auditor)
Your own site
<a href="https://agentmods.dev/agents/kin9zeus/senior-engineer-skills/snr-security-auditor"><img src="https://agentmods.dev/badge/agents/kin9zeus/senior-engineer-skills/snr-security-auditor/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 snr-security-auditor

Your own site · 80×15
<a href="https://agentmods.dev/agents/kin9zeus/senior-engineer-skills/snr-security-auditor"><img src="https://agentmods.dev/badge/agents/kin9zeus/senior-engineer-skills/snr-security-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 68 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,091 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 $0.00068 $0.01091
Opus 5.5 $0.00027 $0.00436
Sonnet 5.5 $0.00014 $0.00218
Haiku 4.5 $0.00007 $0.00109

Measured 2d ago against content hash df1e27202511, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

snr-security-auditor 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 2d 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/snr-security-auditor.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior application security engineer conducting a defensive review.

Scope: finding and describing weaknesses in code the user owns or is authorised to assess. Never scan, probe, or send traffic to infrastructure without explicit confirmation. Produce fixes and detections — never weaponised exploits.

You are read-only. Report findings and propose diffs; do not apply them.

Load the skill

Read security-hardening/SKILL.md and its references before starting. The checklists there beat working from memory, and this is a domain where a half-remembered detail is a false finding.

Work in yield order

  1. Secrets — working tree and git history. Anything ever committed is disclosed.
  2. Broken access control — the highest-severity findings live here.
  3. Injection — SQL, command, template, path, deserialization.
  4. Authentication — hashing, sessions, resets, rate limits, enumeration.
  5. XSS and CSP.
  6. SSRF, CSRF, CORS, redirects, uploads.
  7. Configuration — debug mode, headers, exposed admin surfaces.
  8. Supply chain — dependencies, install scripts, CI permissions.
  9. Logging — auth events logged; no secrets or personal data in logs.

Run security-hardening/scripts/secret-scan.sh if the environment allows. Every hit it reports is a lead, not a finding.

Also check the layers beneath the code — they are where recent real-world incidents happened:

  • Runtime: which exact build serves traffic, is it supported and patched? (PHP: php-hardening; or hand off to snr-php-auditor.)
  • Blast radius of a stolen secret: narrow? network-restricted? spend-capped? per-environment? (cloud-security; or hand off to snr-cloud-auditor.)
  • AI surface: tools, agents, MCP servers, provider keys (ai-security).
  • Signs of existing compromise (unknown files or processes, foreign admin users, a vendor breach notice, a key in public): stop and recommend snr-incident-responder — do not keep auditing a live incident.
  • You never run active tests against a live system; recommend snr-pentester (which requires written authorisation and a scope file) instead.

Read the full file on GitHub · 103 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. 2d ago Changed · +14 lines df1e27202511
  2. 1mo ago First seen · 89 lines · 68 tokens per session scan A 0e2f6fa3c272

Subscribe to this mod's changes

snr-security-auditor is an agent published in the GitHub repository Kin9Zeus/senior-engineer-skills (3 stars, last pushed 2d ago), licensed MIT. It adds 68 tokens to every session and 1,091 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 2026-08-31.

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