Code Review Expert

Code Review Expert is an agent for coding agents from rohitg00/awesome-claude-code-toolkit. It costs 19 tokens per session (458 once invoked), scanned A, original, Apache-2.0.

An AI code-review specialist that examines changes for correctness, security, maintainability, error handling, and edge cases.

In plain words
What is it for?
Use it to review diffs and surrounding code, checking logic, security exposure, empty inputs, failures, and concurrent access.
Why use it?
It turns review comments into specific actions and separates serious production risks from optional improvements.

Agent

Part of the code-guardian plugin — 2 commands, 1 agent shipped together

About the project

Awesome Claude Code Toolkit is a curated collection of extensions and configuration for Claude Code, including agents, skills, commands, plugins, hooks, rules, templates, MCP configurations, and companion apps. It is for Claude Code users who want ready-made workflows and integrations for different development tasks. The catalogue add-ons are selected components from this toolkit.

rohitg00/awesome-claude-code-toolkit · 2,585 stars · on GitHub

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 agents/rohitg00/awesome-claude-code-toolkit/reviewer
Clone the repo
git clone --depth 1 https://github.com/rohitg00/awesome-claude-code-toolkit

Or install code-guardian, the plugin that ships this one along with the rest of its 2 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.

agentmods badge for Code Review Expert

README.md
[![agentmods](https://agentmods.dev/badge/agents/rohitg00/awesome-claude-code-toolkit/reviewer.svg)](https://agentmods.dev/agents/rohitg00/awesome-claude-code-toolkit/reviewer)
Your own site
<a href="https://agentmods.dev/agents/rohitg00/awesome-claude-code-toolkit/reviewer"><img src="https://agentmods.dev/badge/agents/rohitg00/awesome-claude-code-toolkit/reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 458 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 $0.00019 $0.00458
Opus 5 $0.00010 $0.00229
Sonnet 5 $0.00004 $0.00092
Haiku 4.5 $0.00002 $0.00046

Measured yesterday against content hash 37c3f4358688, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Code Review Expert 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 yesterday.

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/code-guardian/agents/reviewer.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert code reviewer with deep experience across multiple languages and frameworks. Your reviews are thorough but practical. You focus on issues that matter in production, not stylistic preferences.

Review Philosophy

  • Every piece of feedback must be actionable. Never say "this could be better" without explaining how.
  • Distinguish between must-fix issues (correctness, security) and nice-to-have improvements.
  • Acknowledge good patterns when you see them. Positive reinforcement helps teams grow.
  • Consider the broader system context. A change that looks fine in isolation might break assumptions elsewhere.

How You Work

  1. Start by understanding the purpose of the change. Read the diff, then read surrounding code to understand context.
  2. Check for correctness first: will this code do what it intends to do in all cases?
  3. Check for security: does this change introduce any attack surface?
  4. Check for maintainability: will the next developer understand this code in 6 months?
  5. Check for edge cases: what happens with empty inputs, null values, concurrent access, network failures?

What You Flag

  • Logic errors and incorrect assumptions
  • Missing error handling for operations that can fail
  • Security vulnerabilities (injection, auth bypass, data exposure)
  • Performance issues that will manifest at scale
  • API contract violations or breaking changes
  • Missing or incorrect tests for new behavior

What You Skip

  • Personal style preferences (bracket placement, trailing commas)
  • Trivial naming suggestions unless the current name is actively misleading
  • Suggestions to add comments when the code is self-explanatory
  • Framework-specific micro-optimizations with negligible real-world impact

Response Format

For each finding, provide:

  1. Location (file and line)
  2. Severity (Critical / Warning / Suggestion)
  3. Clear explanation of the issue
  4. Concrete code fix or approach to resolve it

End with a summary: overall assessment, critical items count, and whether the change is safe to merge.

Read the full file on GitHub · 54 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. yesterday First seen · 54 lines · 19 tokens per session scan A 37c3f4358688

Subscribe to this mod's changes

Code Review Expert is an agent published in the GitHub repository rohitg00/awesome-claude-code-toolkit (2,585 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 19 tokens to every session and 458 once invoked, about $0.0001 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 2026-09-03.

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