code-review

code-review is a skill for Claude Code, Codex from furkangonel/cowrangler. It costs 37 tokens per session (1,330 once invoked), scanned A, original, MIT.

A general code-review process for checking software before it reaches production. It covers correctness, security, performance, maintainability, and reviewing GitHub pull requests.

In plain words
What is it for?
Use it to review code or a GitHub pull request for logic errors, edge cases, security weaknesses, performance problems, duplicated code, and unclear structure.
Why use it?
It helps catch bugs, unsafe input handling, exposed secrets, slow data access, and hard-to-maintain code. A consistent checklist makes important issues less likely to be missed.

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/furkangonel/cowrangler/code-review
Any agent
npx skills add furkangonel/cowrangler --skill code-review
Clone the repo
git clone --depth 1 https://github.com/furkangonel/cowrangler

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-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/furkangonel/cowrangler/code-review.svg)](https://agentmods.dev/skills/furkangonel/cowrangler/code-review)
Your own site
<a href="https://agentmods.dev/skills/furkangonel/cowrangler/code-review"><img src="https://agentmods.dev/badge/skills/furkangonel/cowrangler/code-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,330 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00037 $0.01330
Opus 5 $0.00018 $0.00665
Sonnet 5 $0.00007 $0.00266
Haiku 4.5 $0.00004 $0.00133

Measured 4d ago against content hash 48422e448cdf, 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 scanned grade A with 1 finding 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl fallback (no gh):
bundled_skills/code-review/SKILL.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review SOP

Purpose

Perform a structured, thorough code review that catches bugs, security issues, and maintainability problems before they reach production.

Review Checklist

1. Correctness

  • Logic errors and off-by-one mistakes
  • Null/undefined/empty handling at boundaries
  • Correct error propagation (errors not silently swallowed)
  • Race conditions and async/await correctness
  • Edge cases: empty arrays, zero values, maximum values

2. Security

  • User input validated and sanitized before use
  • No hardcoded secrets, tokens, or passwords
  • No path traversal vulnerabilities (../ in file paths)
  • SQL/command injection not possible
  • Authentication/authorization checks in place
  • Sensitive data not logged

3. Performance

  • No N+1 query patterns
  • No blocking synchronous I/O in hot paths
  • Large data not loaded into memory unnecessarily
  • Proper use of indexes if database queries involved
  • No unnecessary re-computation in loops

4. Maintainability

  • Functions are short and do one thing (SRP)
  • Variable/function names are self-documenting
  • No duplicated logic (DRY principle)
  • Complex logic has explanatory comments
  • Dead code removed
  • Magic numbers replaced with named constants

5. Type Safety (TypeScript/typed languages)

  • No any types without justification
  • Return types explicitly declared for public functions
  • Nullable types handled correctly
  • No unsafe type casts

6. Testing

  • New logic has corresponding tests
  • Edge cases covered in tests
  • Tests are isolated and don't depend on order
  • Mocks are used appropriately

Output Format

Structure your review as:

## Code Review Summary

**Overall Score**: X/10
**Risk Level**: Low / Medium / High / Critical

### Issues Found

#### CRITICAL
- [file:line] Description — Fix: ...

#### MAJOR  
- [file:line] Description — Fix: ...

#### MINOR
- [file:line] Description — Fix: ...

### Positive Observations
- What is done well...

### Recommendation
APPROVE / REQUEST CHANGES / BLOCK

Read the full file on GitHub · 163 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. 4d ago First seen · 163 lines · 37 tokens per session scan A 48422e448cdf

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository furkangonel/cowrangler (2 stars, last pushed 3d ago), licensed MIT. It adds 37 tokens to every session and 1,330 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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