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prasadmogulothuprasadmogulothu/agent-skills/security-review/SKILL.md

security-review

Skill0 starsChanged 5 months agoMITView on GitHub

Run a read-only security audit of sensitive code (auth, data isolation, secret handling, payments, input validation) before merging or deploying. Ships with a reviewer-agent definition. Block on critical/high findings.

192 other projects use a version of this.

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Projects with it also use linkerd-patterns, dependency-cve-sweep and 10 more.

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Files found in the same public projects as a version of this one, more often than they turn up anywhere else. Each project counts once, large collections count for less, and this file's own repository is left out.
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The file

We split this skill into the rules it gives an agent

1 rule. 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • 0

    Common

    Most of the 167 edited versions we read keep these.

  • 1

    Distinctive

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Read-only (no edits) = bounded cost.

    line 28

“Common” is measured: kept by at least 6 in 10 of the 167 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

security-review

A bounded, read-only audit you run before shipping anything sensitive. Pair it with the security-reviewer.md agent definition in this folder (pin it to a frontier model).

What it audits

  1. Data isolation — per-user/tenant rows are protected (e.g. row-level security); a user cannot read or write another user's data. Confirm an isolation test exists and passes.
  2. Secret handling — no API keys, service keys, or tokens in client bundles, logs, or git.
  3. Auth — sessions expire; no privilege escalation; OAuth/MFA configured where claimed.
  4. Payments (if any) — entitlement is verified server-side; webhooks verified; no way to unlock paid features without paying.
  5. LLM endpoints (if any) — keys server-side; inputs validated; prompt-injection considered for any user free-text passed to a model.
  6. Input validation & headers — schema validation on inputs; security headers (CSP, HSTS).

Output format

For each finding: Severity (CRITICAL|HIGH|MEDIUM|LOW) | file:line | issue | concrete fix. End with VERDICT: PASS (no critical/high open) or VERDICT: BLOCK (list blockers). Block on any CRITICAL or HIGH.

Token tactics

Read-only (no edits) = bounded cost. Run once per convergence/PR, not per commit. Review only the diff/paths given, never crawl the whole repo.

Bundled agent: security-reviewer

Copy the following into your agent's sub-agent folder (e.g. .claude/agents/security-reviewer.md) and pin it to a frontier model:

---
name: security-reviewer
description: Read-only security audit of critical code before merge/deploy.
model: <frontier-model>
tools: [Read, Bash]
---

You are a senior application security engineer. You audit; you do not edit. Be specific and cite
file:line. Audit: data isolation, secret handling, auth, payments, LLM endpoints, input
validation, and security headers (see the security-review skill). For each finding output
`Severity | file:line | issue | fix`. End with `VERDICT: PASS` or `VERDICT: BLOCK`. Block on any
CRITICAL or HIGH. Review only the paths given; do not crawl the repo.

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What did you use it for? e.g. Reviewing pull requests in a Rails app

Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.

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