security-review

security-review is a skill for Claude Code, Codex from Maudeunfledged834/startup-founder-skills. It costs 50 tokens per session (1,750 once invoked), scanned A, a copy of security-review, MIT.

A guide for assessing application and infrastructure security, including threat modeling, vulnerability review, authentication audits, and dependency scanning.

In plain words
What is it for?
Use it to review code, authentication, dependencies, data flows, secrets, infrastructure, or a feature before release or penetration testing.
Why use it?
It provides a structured way to find security weaknesses and account for sensitive data, compliance needs, system boundaries, and testing authorization.

Skill for Claude CodeCodex

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

Good fit Use it to review code, authentication, dependencies, data flows, secrets, infrastructure, or a feature before release or penetration testing.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/maudeunfledged834/startup-founder-skills/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 Maudeunfledged834/startup-founder-skills --skill security-review
Clone the repo
git clone --depth 1 https://github.com/Maudeunfledged834/startup-founder-skills

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-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/maudeunfledged834/startup-founder-skills/security-review/github.svg)](https://agentmods.dev/skills/maudeunfledged834/startup-founder-skills/security-review)
Your own site
<a href="https://agentmods.dev/skills/maudeunfledged834/startup-founder-skills/security-review"><img src="https://agentmods.dev/badge/skills/maudeunfledged834/startup-founder-skills/security-review/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-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/maudeunfledged834/startup-founder-skills/security-review"><img src="https://agentmods.dev/badge/skills/maudeunfledged834/startup-founder-skills/security-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,750 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 100% copy Near-identical to another mod 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 $0.00050 $0.01750
Opus 5 $0.00025 $0.00875
Sonnet 5 $0.00010 $0.00350
Haiku 4.5 $0.00005 $0.00175

Measured 12d ago against content hash b6c434d7ae90, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, 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 12d 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.

Origin

This is a copy

100% identical to security-review — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/security-review/SKILL.md · 152 lines

How it starts

The opening of the file, as written. The whole thing — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Review

When to Use

  • The user wants a security audit of their application, infrastructure, or specific feature
  • They need a threat model before launching or a penetration test preparation review
  • They have a dependency vulnerability alert and need remediation guidance
  • They are handling sensitive data (PII, payment, health) and need verification
  • Code audit, secrets detection, or compliance assessment is requested

Context Required

From startup-context: tech stack, deployment environment, compliance requirements, data types. Also ask:

  • Scope — Full app, feature, auth system, single PR, infrastructure, or cloud environment
  • Data types — PII, payment, health, credentials, or other sensitive data handled
  • Compliance requirements — SOC 2, HIPAA, PCI-DSS, GDPR, ISO 27001
  • Authorization — Confirm written authorization exists before any active testing

Workflow

Follow a five-phase methodology. Automated scanning precedes manual review. Authorization verification is mandatory before active testing.

  1. Scope definition — Establish attack surface boundaries. Identify all components, data flows, and trust boundaries. Confirm authorization. Define in-scope and out-of-scope.
  2. Automated scanning — Execute tooling before manual review:
    • SAST: semgrep --config=auto across the codebase
    • Dependency audit: npm audit / pip-audit / govulncheck / trivy fs .
    • Secrets detection: Scan for hardcoded credentials, API keys, tokens in source
    • Container scanning: trivy image for containerized deployments
    • Record all automated findings for validation in the next phase.
  3. Manual code review — Conduct contextual analysis that automated tools miss:
    • Authentication and authorization flow tracing end-to-end
    • Business logic vulnerabilities (price manipulation, race conditions, privilege escalation)
    • Data flow analysis for sensitive information (where does PII enter, transit, and persist?)
    • STRIDE threat modeling against each component and data flow
  4. Validation and classification — Test findings and assign severity:
    • Validate automated findings to eliminate false positives
    • Assign CVSS v3.1 scores; assess exploitability in context
    • Classify by business impact, not just technical severity
  5. Reporting — Document vulnerabilities with precise locations, business impact, and corrective actions. Deliver a prioritized remediation roadmap.

Read the full file on GitHub · 152 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. 12d ago First seen · 152 lines · 50 tokens per session scan A b6c434d7ae90

Subscribe to this mod's changes

security-review is a skill published in the GitHub repository Maudeunfledged834/startup-founder-skills (6 stars, last pushed today), licensed MIT. It adds 50 tokens to every session and 1,750 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to security-review, differing in 0 lines, and is treated as a copy.

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