code-review

A structured code-review workflow for checking software for correctness, security, speed, maintainability, and testing gaps.

In plain words
What is it for?
Use it to audit code, explain critical issues, suggest specific fixes, assess tests, and summarize both problems and good practices.
Why use it?
It helps catch logic errors, security risks, inefficient code, unclear structure, and missing edge-case tests before changes are merged.

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

Made for: Claude Code, Codex.

Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 303 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 $0.00029 $0.00303
Opus 5 $0.00015 $0.00151
Sonnet 5 $0.00006 $0.00061
Haiku 4.5 $0.00003 $0.00030

Measured 2d ago against content hash d18d57ff6d8b, 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 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 2d 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.

examples/skills/code-review/SKILL.md · 67 lines

What it actually says

Code Review Skill

Perform thorough code reviews following this methodology.

Review Checklist

1. Correctness

  • Does the code do what it's supposed to do?
  • Are there any logic errors?
  • Are edge cases handled?

2. Security

  • Input validation and sanitization
  • Authentication and authorization
  • Sensitive data handling
  • SQL injection, XSS, and other vulnerabilities

3. Performance

  • Algorithm complexity
  • Unnecessary computations
  • Memory leaks or inefficient memory usage
  • Database query optimization

4. Maintainability

  • Code readability and clarity
  • Appropriate naming conventions
  • Single responsibility principle
  • DRY (Don't Repeat Yourself)

5. Testing

  • Test coverage
  • Edge case testing
  • Integration tests where appropriate

Output Format

Structure your review as:

## Summary
[One paragraph overview]

## Critical Issues
[Must fix before merge]

## Suggestions
[Nice to have improvements]

## Positive Observations
[What's done well]

Guidelines

  • Be constructive, not critical
  • Explain why something is an issue
  • Suggest specific fixes when possible
  • Acknowledge good patterns and practices
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. 2d ago First seen · 67 lines · 29 tokens per session scan A d18d57ff6d8b

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository Geeksfino/openskills (70 stars, last pushed 4d ago), licensed Apache-2.0. It adds 29 tokens to every session and 303 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.