security-review

security-review is a skill for Claude Code from ashtonian/llm-init. It costs 12 tokens per session (775 once invoked), scanned A, original, MIT.

A step-by-step checklist for reviewing a codebase or feature for security problems.

In plain words
What is it for?
It is for checking input handling, database queries, command execution, authentication, authorization, data protection, and related security controls.
Why use it?
It reduces the chance of missing common risks such as injection, weak access checks, exposed secrets, unsafe file paths, or unprotected sensitive data.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit It is for checking input handling, database queries, command execution, authentication, authorization, data protection, and related security controls.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ashtonian/llm-init/security-review
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 ashtonian/llm-init --skill security-review
Clone the repo
git clone --depth 1 https://github.com/ashtonian/llm-init

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-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/ashtonian/llm-init/security-review.svg)](https://agentmods.dev/skills/ashtonian/llm-init/security-review)
Your own site
<a href="https://agentmods.dev/skills/ashtonian/llm-init/security-review"><img src="https://agentmods.dev/badge/skills/ashtonian/llm-init/security-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 775 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 $0.00012 $0.00775
Opus 5 $0.00006 $0.00387
Sonnet 5 $0.00002 $0.00155
Haiku 4.5 $0.00001 $0.00077

Measured 7d ago against content hash e2f335d86914, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

security-review 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.

templates/.claude/skills/security-review/SKILL.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Perform a security review of the codebase or a specific feature.

Instructions

  1. Read .claude/rules/agent-guide.md for project context and tech stack.
  2. Read docs/spec/.llm/PROGRESS.md for known security considerations.
  3. Perform a systematic security assessment covering the categories below.

Input Validation & Injection

  • All user input is validated at system boundaries (handlers, CLI, config)
  • SQL queries use parameterized statements (no string concatenation)
  • Command execution inputs are properly escaped
  • File paths from user input are sanitized (no path traversal)
  • HTML output is escaped to prevent XSS
  • JSON/XML parsing has size limits and depth limits

Authentication & Authorization

  • Auth checks exist on all protected endpoints
  • Token/session handling follows best practices (expiry, rotation, secure storage)
  • Password handling uses proper hashing (bcrypt/argon2/scrypt, not MD5/SHA)
  • Rate limiting exists on auth endpoints
  • Privilege escalation paths are checked
  • CORS policy is properly configured

Data Protection

  • Sensitive data is not logged (passwords, tokens, PII)
  • Secrets are not hardcoded in source (check for API keys, passwords, tokens)
  • Environment variables used for secrets, not config files committed to git
  • Data at rest encryption where required
  • Data in transit uses TLS
  • PII handling complies with requirements (GDPR, CCPA, etc.)

Dependencies

  • No known vulnerable dependencies (run go vuln check, npm audit, etc.)
  • Dependencies are pinned to specific versions
  • Minimal dependency surface (no unnecessary packages)
  • No dependencies with concerning permissions or behaviors

Error Handling & Information Disclosure

  • Error messages don't leak internal details to external users
  • Stack traces are not exposed in production responses
  • Debug endpoints are disabled in production
  • Logging doesn't include sensitive request/response bodies

Read the full file on GitHub · 98 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 · 98 lines · 12 tokens per session scan A e2f335d86914

Subscribe to this mod's changes

security-review is a skill published in the GitHub repository ashtonian/llm-init (2 stars, last pushed 7mo ago), licensed MIT. It adds 12 tokens to every session and 775 once invoked, about $0.0001 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 2026-08-31.

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