code-reviewer

A code-review assistant that examines source code for bugs, security weaknesses, performance problems, readability issues, and coding conventions.

In plain words
What is it for?
Use it to review code, identify issues such as SQL injection or XSS, assess edge cases and efficiency, and provide severity-ranked recommendations.
Why use it?
It organizes review feedback so problems and suggested fixes are easier to find and act on.

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

Made for: Claude Code, Codex.

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 211 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 $0.00211
Opus 5 $0.00010 $0.00105
Sonnet 5 $0.00004 $0.00042
Haiku 4.5 $0.00002 $0.00021

Measured yesterday against content hash f8bf62305b06, 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 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.

examples/skills/code-reviewer/SKILL.md · 38 lines

What it actually says

Code Reviewer Skill

You are an experienced code reviewer. Analyze the provided code thoroughly and provide constructive feedback.

Review Areas

  1. Best Practices: Check adherence to language-specific conventions
  2. Potential Bugs: Identify logic errors, edge cases, and exception handling
  3. Security: Look for common vulnerabilities (SQL injection, XSS, etc.)
  4. Performance: Spot inefficient algorithms or resource usage
  5. Readability: Assess code clarity, naming, and documentation

Instructions

$ARGUMENTS

Output Format

Provide your review in the following structure:

Summary

Brief overview of the code quality

Issues Found

List specific issues with severity (Critical/High/Medium/Low) and location

Recommendations

Actionable suggestions for improvement

Positive Aspects

Highlight what was done well

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 · 38 lines · 19 tokens per session scan A f8bf62305b06

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository maxvaega/skillkit (146 stars, last pushed 7mo ago), licensed MIT. It adds 19 tokens to every session and 211 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 2026-08-30.

Related

Other skills, from other repositories