What is security-reviewer?

A security review process for web applications, APIs, and command-line tools across many programming languages. It checks areas such as access control, unsafe output, outbound requests, database queries, dependencies, and configuration.

Use it after adding routes, authentication, rendering, network requests, database logic, dependencies, or deployment settings, and before security-sensitive releases.

It catches common security mistakes when code or infrastructure changes, with findings ranked by severity and tied to concrete evidence and fixes.

security-reviewer — Skill for Claude Code by Security-Phoenix-demo

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 Security-Phoenix-demo/security-skills-claude-code --skill security-reviewer

Clone the repo

git clone --depth 1 https://github.com/Security-Phoenix-demo/security-skills-claude-code

Made for: Claude Code.

Or install phoenix-security-review, the plugin that ships this one along with the rest of its 6 skills, 4 commands, 1 agent.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/security-phoenix-demo/security-skills-claude-code/security-reviewer/github.svg)](https://agentmods.dev/skills/security-phoenix-demo/security-skills-claude-code/security-reviewer)

Your own site

<a href="https://agentmods.dev/skills/security-phoenix-demo/security-skills-claude-code/security-reviewer"><img src="https://agentmods.dev/badge/skills/security-phoenix-demo/security-skills-claude-code/security-reviewer/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/security-phoenix-demo/security-skills-claude-code/security-reviewer"><img src="https://agentmods.dev/badge/skills/security-phoenix-demo/security-skills-claude-code/security-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 185 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,342 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.

Model	Per session	Once invoked
Fable 5.1	$0.00185	$0.01342
Opus 5.5	$0.00074	$0.00537
Sonnet 5.5	$0.00037	$0.00268
Haiku 4.5	$0.00018	$0.00134

Measured 2mo ago against content hash fc77a15b8f0c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

security-reviewer 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 2mo 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.

plugins/phoenix-security-review/skills/security-reviewer/SKILL.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Reviewer

A pragmatic AppSec review pass for any modern stack. Output is short, severity-ranked findings with file paths, evidence, and a concrete fix — never a 30-page "report".

When to run

Run on any of:

New HTTP route, RPC handler, or queue consumer
Auth, session, RBAC, or tenant-isolation change
Frontend rendering / templating change (XSS surface)
Outbound HTTP, file fetch, or URL handling (SSRF surface)
Database query change (injection / IDOR surface)
Dependency manifest change or lockfile bump
Config / IaC change (CORS, headers, CSP, IAM, secrets)
End of a major feature, pre-release, or before opening a PR labelled security-sensitive

If unsure, run it. False positives are cheap; missed CVEs are not.

Eight-point check (language-agnostic)

These eight categories drive every review. Every finding maps to one.

Authn/Authz — every route has explicit auth + role/tenant checks; no implicit "logged-in means allowed"
Output encoding — all user-influenced HTML/markdown/JSON/log output is encoded for its sink
SSRF & outbound HTTP — URL allow-listed, redirects bounded, IMDS / link-local / RFC1918 blocked unless intentional
Secrets & key material — no client-side storage, no hardcoded keys, no secrets in URLs or logs
Input handling — parameterised queries, path containment, redirect target validation, deserialisation guards
Config & headers — CSP, HSTS, X-Content-Type-Options, secure cookies, CORS allowlist, rate limits, dev-bypass off in prod
Supply chain — dependencies pinned, lockfile committed, manifest scanned, no unknown registries, install scripts reviewed
Failure modes — fail-closed on auth/policy errors, no broad except/catch, errors don't leak stack traces or PII

Routing

When language is known, load the matching reference and use its diagnostic patterns. When mixed, run all relevant ones.

Detected from…	Read…
`pyproject.toml`, `requirements*.txt`, `Pipfile`, `setup.py`	`languages/python.md`
`package.json`, `.ts`, `.tsx`, `.js`, `.jsx`	`languages/javascript-typescript.md`
`go.mod`	`languages/go.md`
`Cargo.toml`	`languages/rust.md`
`pom.xml`, `build.gradle`, `.kt`, `*.java`	`languages/java.md`
`Gemfile`, `*.rb`	`languages/ruby.md`
`.csproj`, `.sln`, `*.cs`	`languages/dotnet.md`

Read the full file on GitHub · 88 lines

Files

What ships with it

10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 88 lines · 185 tokens per session scan A fc77a15b8f0c

Subscribe to this mod's changes

security-reviewer is a skill published in the GitHub repository Security-Phoenix-demo/security-skills-claude-code (81 stars, last pushed 5d ago), licensed MIT. It adds 185 tokens to every session and 1,342 once invoked, about $0.0007 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 2026-08-30.