codex-review

codex-review is a skill for Claude Code from jezweb/claude-skills. It costs 122 tokens per session (1,212 once invoked), scanned A, original, MIT.

An independent review of recent code changes, pull requests, commits, or an entire application using the OpenAI Codex command-line tool. It looks for bugs, security issues, performance risks, testing gaps, and user-interface or state problems.

In plain words
What is it for?
Use it before committing, opening a pull request, or shipping a meaningful change, or when you want a second opinion about code that seems wrong.
Why use it?
A separate reviewer can spot problems that the person who wrote the code may overlook.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: positional $N argument; mentions Claude Code; mentions Codex.

Part of the dev-tools plugin — 16 skills, 14 commands shipped together

Good fit Use it before committing, opening a pull request, or shipping a meaningful change, or when you want a second opinion about code that seems wrong.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jezweb/claude-skills/codex-review
About the project

jezweb/claude-skills is a collection of skills, commands, plugins, settings, instructions, and hooks that guide the Claude Code CLI through development tasks and produce outputs such as project scaffolds, assets, documents, or deployed services. It is for developers using Claude Code with technologies and services including Cloudflare, React, Tailwind, Shopify, and WordPress. The catalogue entries are the project's own Claude Code workflow components.

jezweb/claude-skills · 1,084 stars · on GitHub · jezweb.com.au

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.

Any agent
npx skills add jezweb/claude-skills --skill codex-review
Clone the repo
git clone --depth 1 https://github.com/jezweb/claude-skills

Made for: Claude Code.

Or install dev-tools, the plugin that ships this one along with the rest of its 16 skills, 14 commands.

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 codex-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/jezweb/claude-skills/codex-review/github.svg)](https://agentmods.dev/skills/jezweb/claude-skills/codex-review)
Your own site
<a href="https://agentmods.dev/skills/jezweb/claude-skills/codex-review"><img src="https://agentmods.dev/badge/skills/jezweb/claude-skills/codex-review/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for codex-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/jezweb/claude-skills/codex-review"><img src="https://agentmods.dev/badge/skills/jezweb/claude-skills/codex-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 122 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,212 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 15 Sept 2026
  • Snyk pass 15 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00122 $0.01212
Opus 5.5 $0.00049 $0.00485
Sonnet 5.5 $0.00024 $0.00242
Haiku 4.5 $0.00012 $0.00121

Measured 1mo ago against content hash 06c31bb4e4aa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codex-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 1mo 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.

plugins/dev-tools/skills/codex-review/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Codex Review

Run an independent code review via the OpenAI Codex CLI (codex review). The value is a second opinion from a different model family than the one that wrote the code — Codex catches things Claude misses due to author bias.

Complements brains-trust (generic multi-model opinions). This skill is specialised: git-aware, uses a tuned review prompt, saves structured output.

When to Use

  • After a meaningful change, before committing or shipping
  • Before opening a PR, to self-review with an independent reviewer
  • When something feels off but you can't articulate what
  • Periodic whole-app reviews for projects in active development
  • When the user explicitly asks for an "independent" or "second opinion" review

Do NOT use for:

  • Trivial changes (typos, one-line fixes)
  • Research questions or architecture discussions — use brains-trust instead
  • Auto-fixing issues — this is advisory only

Preflight

  1. Confirm Codex CLI is installed:

    which codex
    

    If missing: tell the user to install it (brew install codex on macOS, or see https://github.com/openai/codex) and stop. Do not continue.

  2. Confirm auth: the first codex review call will fail clearly if not logged in. If that happens, instruct the user to run codex login and stop.

Determine scope

Pick the scope flag based on what the user asked for:

User intent Flag
"codex review" / "review the app" / "full review" / default no flag (reviews whole app at current HEAD)
"review my changes" / "review what I just did" / "review uncommitted" --uncommitted
"review this branch vs main" / "review the PR" --base main (or the branch they name)
"review commit abc123" --commit abc123

Default is whole-app review. A bare "codex review" with no qualifier means review the entire codebase at HEAD — not just uncommitted changes. Only use --uncommitted if the user specifically refers to their recent/uncommitted work.

If ambiguous, ask once. Don't guess on commits or branches.

Read the full file on GitHub · 105 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 105 lines · 122 tokens per session scan A 06c31bb4e4aa

Subscribe to this mod's changes

codex-review is a skill published in the GitHub repository jezweb/claude-skills (1,084 stars, last pushed 18d ago), licensed MIT. It adds 122 tokens to every session and 1,212 once invoked, about $0.0005 per session on Opus 5.5. 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

react-effects-audit

Use when auditing React or Next.js components for unnecessary or unsafe useEffect usage -- detects 9 anti-patterns from "You Might Not Need an Effect".

fusengine/agents · 36 tokens

React Component Reviewer

Analyzes React components for performance, accessibility, and modern hook usage.

Notysoty/openagentskills · 18 tokens

react-component-hook-guidelines

Use when reviewing, refactoring, or implementing React components and custom Hooks with unclear boundaries or oversized props.

YangsonHung/awesome-agent-skills · 27 tokens

react-component-hook-guidelines-cn

Guidance for splitting and reviewing React components and custom Hooks, which are reusable functions that manage React logic. It focuses on separating page layout, display, state, requests, and side effects into clearer parts.

YangsonHung/awesome-agent-skills · 190 tokens

react-senior-code-review

Senior-level review of a React feature, by theSeniorDev — structure & boundaries, state & data flow, performance & rendering, types/forms/testability/a11y, and styling architecture & motion. Recommends design patterns by name when one fits. Produces prioritized findings (Critical → Nit) with file:line, why, and a…

the-senior-dev/senior-dev-skills · 127 tokens

review-work

Post-implementation gate review: run manual QA on the real surface yourself, then launch ONE gate reviewer (never a panel) to audit goal, constraints, code quality, security, missed context, and QA evidence. Use before a PR handoff or when the user explicitly asks to review completed work.

code-yeongyu/oh-my-openagent · 63 tokens