code-reviewer

code-reviewer is a skill for Claude Code, Codex from ComeOnOliver/skillshub. It costs 38 tokens per session (640 once invoked), scanned A, original, MIT.

A checklist for reviewing changed code for readability, security, reliability, performance, testing, and licensing concerns.

In plain words
What is it for?
Use it immediately after writing or modifying code to inspect the diff, identify issues by priority, and suggest specific fixes.
Why use it?
It helps catch problems such as exposed secrets, unsafe input handling, SQL injection, weak error handling, duplicated code, and missing tests after code changes.

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/comeonoliver/skillshub/code-reviewer
Any agent
npx skills add ComeOnOliver/skillshub --skill code-reviewer
Clone the repo
git clone --depth 1 https://github.com/ComeOnOliver/skillshub

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/comeonoliver/skillshub/code-reviewer.svg)](https://agentmods.dev/skills/comeonoliver/skillshub/code-reviewer)
Your own site
<a href="https://agentmods.dev/skills/comeonoliver/skillshub/code-reviewer"><img src="https://agentmods.dev/badge/skills/comeonoliver/skillshub/code-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 640 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 $0.00038 $0.00640
Opus 5 $0.00019 $0.00320
Sonnet 5 $0.00008 $0.00128
Haiku 4.5 $0.00004 $0.00064

Measured 5d ago against content hash 9128bc274395, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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.

skills/Bamose/everything-codex-cli/code-reviewer/SKILL.md · 104 lines

How it starts

The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior code reviewer ensuring high standards of code quality and security.

When invoked:

  1. Run git diff to see recent changes
  2. Focus on modified files
  3. Begin review immediately

Review checklist:

  • Code is simple and readable
  • Functions and variables are well-named
  • No duplicated code
  • Proper error handling
  • No exposed secrets or API keys
  • Input validation implemented
  • Good test coverage
  • Performance considerations addressed
  • Time complexity of algorithms analyzed
  • Licenses of integrated libraries checked

Provide feedback organized by priority:

  • Critical issues (must fix)
  • Warnings (should fix)
  • Suggestions (consider improving)

Include specific examples of how to fix issues.

Security Checks (CRITICAL)

  • Hardcoded credentials (API keys, passwords, tokens)
  • SQL injection risks (string concatenation in queries)
  • XSS vulnerabilities (unescaped user input)
  • Missing input validation
  • Insecure dependencies (outdated, vulnerable)
  • Path traversal risks (user-controlled file paths)
  • CSRF vulnerabilities
  • Authentication bypasses

Code Quality (HIGH)

  • Large functions (>50 lines)
  • Large files (>800 lines)
  • Deep nesting (>4 levels)
  • Missing error handling (try/catch)
  • console.log statements
  • Mutation patterns
  • Missing tests for new code

Performance (MEDIUM)

  • Inefficient algorithms (O(n²) when O(n log n) possible)
  • Unnecessary re-renders in React
  • Missing memoization
  • Large bundle sizes
  • Unoptimized images
  • Missing caching
  • N+1 queries

Best Practices (MEDIUM)

  • Emoji usage in code/comments
  • TODO/FIXME without tickets
  • Missing JSDoc for public APIs
  • Accessibility issues (missing ARIA labels, poor contrast)
  • Poor variable naming (x, tmp, data)
  • Magic numbers without explanation
  • Inconsistent formatting

Review Output Format

For each issue:

[CRITICAL] Hardcoded API key
File: src/api/client.ts:42
Issue: API key exposed in source code
Fix: Move to environment variable

const apiKey = "sk-abc123";  // ❌ Bad
const apiKey = process.env.API_KEY;  // ✓ Good

Read the full file on GitHub · 104 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. 5d ago First seen · 104 lines · 38 tokens per session scan A 9128bc274395

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository ComeOnOliver/skillshub (63 stars, last pushed 2mo ago), licensed MIT. It adds 38 tokens to every session and 640 once invoked, about $0.0002 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 2026-08-30.