code-reviewer

code-reviewer is a skill for Claude Code, Codex from hackermanishackerman/claude-skills-vault. It costs 0 tokens per session (974 once invoked), scanned A, original, MIT.

A code-review guide that checks software for quality, security weaknesses, performance problems, maintainability issues, and missing tests.

In plain words
What is it for?
Use it to review code or pull requests, including checks for vulnerabilities, inefficient queries, dead code, complexity, and documentation gaps.
Why use it?
It gives a structured way to spot defects and risks that may be missed during a normal change review.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/hackermanishackerman/claude-skills-vault/code-reviewer
Any agent
npx skills add hackermanishackerman/claude-skills-vault --skill code-reviewer
Clone the repo
git clone --depth 1 https://github.com/hackermanishackerman/claude-skills-vault

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 code-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/skills/hackermanishackerman/claude-skills-vault/code-reviewer.svg)](https://agentmods.dev/skills/hackermanishackerman/claude-skills-vault/code-reviewer)
Your own site
<a href="https://agentmods.dev/skills/hackermanishackerman/claude-skills-vault/code-reviewer"><img src="https://agentmods.dev/badge/skills/hackermanishackerman/claude-skills-vault/code-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 974 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00974
Opus 5 $0.00000 $0.00487
Sonnet 5 $0.00000 $0.00195
Haiku 4.5 $0.00000 $0.00097

Measured 5d ago against content hash 3b686c141271, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

code-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 5d 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.

.claude/skills/code-reviewer/SKILL.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer Skill

A comprehensive code review skill that analyzes code quality, security, performance, and best practices.

When to Use

Invoke this skill when:

  • User asks to review code or a pull request
  • User requests code quality analysis
  • User wants security or performance audit
  • Commands: /review, /code-review, /pr-review

Capabilities

1. Code Quality Analysis

  • Dead code detection
  • Unused imports/variables
  • Code duplication (DRY violations)
  • Complexity metrics (cyclomatic complexity)
  • Function/method length analysis
  • Naming conventions

2. Security Review

  • SQL injection vulnerabilities
  • XSS vulnerabilities
  • Command injection risks
  • Hardcoded secrets/credentials
  • Insecure dependencies
  • Authentication/authorization issues
  • Input validation gaps

3. Performance Analysis

  • N+1 query detection
  • Inefficient algorithms
  • Memory leaks
  • Unnecessary re-renders (React)
  • Bundle size concerns
  • Caching opportunities

4. Best Practices

  • SOLID principles adherence
  • Design pattern usage
  • Error handling
  • Logging practices
  • Test coverage gaps
  • Documentation completeness

Review Process

Step 1: Understand Context

1. Identify the language/framework
2. Understand the purpose of the code
3. Check for existing patterns in the codebase
4. Review any related tests

Step 2: Systematic Review

Use the checklist at checklist.md to perform a thorough review.

Step 3: Categorize Findings

Severity Description Action Required
Critical Security vulnerabilities, data loss risks Must fix before merge
High Bugs, significant performance issues Should fix before merge
Medium Code quality issues, minor bugs Consider fixing
Low Style issues, minor improvements Optional
Info Suggestions, alternative approaches For consideration

Step 4: Provide Actionable Feedback

Read the full file on GitHub · 190 lines

Files

What ships with it

1 file 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.

  1. 5d ago First seen · 190 lines · 0 tokens per session scan A 3b686c141271

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository hackermanishackerman/claude-skills-vault (2 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 974 tokens. 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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