Code Review Checklist

Code Review Checklist is a skill for Claude Code, Codex from Notysoty/openagentskills. It costs 26 tokens per session (1,198 once invoked), scanned A, original, MIT.

A structured review checklist for a code file or diff, the displayed set of changes between two code versions. It examines correctness, security, performance, and readability.

In plain words
What is it for?
Use it before merging a pull request, after a refactor, or whenever you want line-level feedback on code quality.
Why use it?
It provides specific, prioritized feedback on problems that a quick review may overlook.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for cline. Also seen: mentions Claude Code; mentions Codex; built for cline.

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/notysoty/openagentskills/code-review-checklist
Any agent
npx skills add Notysoty/openagentskills --skill code-review-checklist
Clone the repo
git clone --depth 1 https://github.com/Notysoty/openagentskills

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 Checklist

README.md
[![agentmods](https://agentmods.dev/badge/skills/notysoty/openagentskills/code-review-checklist.svg)](https://agentmods.dev/skills/notysoty/openagentskills/code-review-checklist)
Your own site
<a href="https://agentmods.dev/skills/notysoty/openagentskills/code-review-checklist"><img src="https://agentmods.dev/badge/skills/notysoty/openagentskills/code-review-checklist.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,198 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 5.1 $0.00026 $0.01198
Opus 5 $0.00013 $0.00599
Sonnet 5 $0.00005 $0.00240
Haiku 4.5 $0.00003 $0.00120

Measured 6d ago against content hash 4d1d4dc9980c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Code Review Checklist 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 6d 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-checklist/SKILL.md · 130 lines

How it starts

The opening of the file, as written. The whole thing — 130 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review Checklist

What this skill does

This skill directs the agent to perform a structured code review using a proven checklist. It catches bugs, security issues, performance problems, and readability concerns that are easy to miss in a quick scan. The output is a prioritized list of findings — not vague suggestions, but specific line-level feedback with clear explanations.

Use this before merging a PR, after a refactor, or any time you want a second opinion on code quality.

How to use

Claude Code / Cline

Copy this file to .agents/skills/code-review-checklist/SKILL.md in your project root.

Then ask the agent:

  • "Review this file using the Code Review Checklist skill."
  • "Run the Code Review Checklist skill on my PR diff."

Cursor

Add the contents of the "Prompt / Instructions" section below to your .cursorrules file, then open the file you want reviewed and ask Cursor to review it.

Codex

Paste the code and the instructions from the section below into the Codex chat.

The Prompt / Instructions for the Agent

When asked to review code, work through each section of this checklist in order. For every issue found, output:

  • Severity: critical | major | minor | nit
  • Location: file name and line number(s)
  • Issue: one-sentence description
  • Suggestion: what to do instead

1. Correctness

  • Does the logic match the intended behavior (based on function name, comments, or context)?
  • Are there off-by-one errors in loops or array accesses?
  • Are all code paths handled, including edge cases (empty input, null, zero, negative numbers)?
  • Are async operations properly awaited? Could there be race conditions?
  • Are errors caught and handled appropriately, or silently swallowed?

2. Security

  • Is any user input used in SQL queries, shell commands, or file paths without sanitization?
  • Are secrets, API keys, or passwords hardcoded or logged?
  • Are authentication and authorization checks in place before sensitive operations?
  • Is output properly escaped before being rendered in HTML (XSS)?
  • Are dependencies pinned to known-good versions?

Read the full file on GitHub · 130 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. 6d ago First seen · 130 lines · 26 tokens per session scan A 4d1d4dc9980c

Subscribe to this mod's changes

Code Review Checklist is a skill published in the GitHub repository Notysoty/openagentskills (9 stars, last pushed 22d ago), licensed MIT. It adds 26 tokens to every session and 1,198 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 2026-08-31.

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