code-reviewer

code-reviewer is a skill for Claude Code, Codex from mehdiozdemir/awesome-agent-skills. It costs 48 tokens per session (2,127 once invoked), scanned A, original, MIT.

A guide for reviewing code changes for bugs, security weaknesses, speed problems, maintainability issues, and violations of good development practices. It can be used for pull requests, which are proposed changes submitted for review.

In plain words
What is it for?
It helps inspect proposed changes, find logical errors and edge cases, check authentication and input handling, identify inefficient operations, and assess error handling.
Why use it?
It provides a broad checklist so important problems are less likely to be missed during a code review.

Skill for Claude CodeCodex

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

Good fit It helps inspect proposed changes, find logical errors and edge cases, check authentication and input handling, identify inefficient operations, and assess error handling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mehdiozdemir/awesome-agent-skills/code-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 mehdiozdemir/awesome-agent-skills --skill code-review
Clone the repo
git clone --depth 1 https://github.com/mehdiozdemir/awesome-agent-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 code-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/skills/mehdiozdemir/awesome-agent-skills/code-review/github.svg)](https://agentmods.dev/skills/mehdiozdemir/awesome-agent-skills/code-review)
Your own site
<a href="https://agentmods.dev/skills/mehdiozdemir/awesome-agent-skills/code-review"><img src="https://agentmods.dev/badge/skills/mehdiozdemir/awesome-agent-skills/code-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 code-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/skills/mehdiozdemir/awesome-agent-skills/code-review"><img src="https://agentmods.dev/badge/skills/mehdiozdemir/awesome-agent-skills/code-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,127 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.02127
Opus 5 $0.00024 $0.01064
Sonnet 5 $0.00010 $0.00425
Haiku 4.5 $0.00005 $0.00213

Measured 10d ago against content hash 6845627bec2b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, 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 10d 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/code-review/SKILL.md · 345 lines

How it starts

The opening of the file, as written. The whole thing — 345 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer Skill

This skill provides thorough code review capabilities across all programming languages and frameworks. Use this whenever you need to analyze code for quality, security, performance, or maintainability concerns.

Review Scope

When reviewing code, analyze across these dimensions:

1. Security Analysis

  • Identify potential security vulnerabilities (SQL injection, XSS, CSRF, etc.)
  • Check for hardcoded credentials, API keys, or sensitive data
  • Verify proper input validation and sanitization
  • Review authentication and authorization implementations
  • Check for insecure cryptographic practices
  • Identify potential data leakage points

2. Bug Detection

  • Identify logical errors and edge cases
  • Check for null/undefined reference errors
  • Detect off-by-one errors and boundary conditions
  • Identify race conditions and concurrency issues
  • Check for memory leaks and resource management
  • Verify error handling and exception management

3. Performance Issues

  • Identify inefficient algorithms and data structures
  • Detect N+1 query problems in database operations
  • Check for unnecessary loops and redundant operations
  • Identify memory-intensive operations
  • Review caching strategies and opportunities
  • Analyze computational complexity (Big O)

4. Code Quality & Best Practices

  • Verify adherence to language-specific conventions
  • Check code readability and maintainability
  • Identify code duplication and suggest DRY improvements
  • Review naming conventions (variables, functions, classes)
  • Check function/method length and complexity
  • Verify proper separation of concerns
  • Assess test coverage and testability

5. Architecture & Design

  • Review design patterns usage and appropriateness
  • Check for SOLID principles violations
  • Identify tight coupling and low cohesion
  • Review dependency management
  • Assess scalability considerations
  • Check for proper abstraction layers

Review Process

Follow this structured approach when reviewing code:

Read the full file on GitHub · 345 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. 10d ago First seen · 345 lines · 48 tokens per session scan A 6845627bec2b

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository mehdiozdemir/awesome-agent-skills (2 stars, last pushed 7mo ago), licensed MIT. It adds 48 tokens to every session and 2,127 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 2026-08-31.