codex-review

codex-review is a skill for Claude Code from chaseai-yt/claudex-loop. It costs 271 tokens per session (2,524 once invoked), scanned B, original, no licence file.

A review process in which Claude Code prepares an implementation plan and OpenAI Codex acts as a read-only critic. The two tools examine the plan together before code is written.

In plain words
What is it for?
Use it to stress-test a finished plan, identify missing details, and catch implementation risks before development starts.
Why use it?
It helps find weaknesses in an existing plan without changing the code during the review.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the claudex-loop plugin — 5 skills shipped together

Good fit Use it to stress-test a finished plan, identify missing details, and catch…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chaseai-yt/claudex-loop/codex-review
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 chaseai-yt/claudex-loop --skill codex-review
Clone the repo
git clone --depth 1 https://github.com/chaseai-yt/claudex-loop

Made for: Claude Code.

Or install claudex-loop, the plugin that ships this one along with the rest of its 5 skills.

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/chaseai-yt/claudex-loop/codex-review.svg)](https://agentmods.dev/skills/chaseai-yt/claudex-loop/codex-review)
Your own site
<a href="https://agentmods.dev/skills/chaseai-yt/claudex-loop/codex-review"><img src="https://agentmods.dev/badge/skills/chaseai-yt/claudex-loop/codex-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 271 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,524 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00271 $0.02524
Opus 5 $0.00135 $0.01262
Sonnet 5 $0.00054 $0.00505
Haiku 4.5 $0.00027 $0.00252

Measured 7d ago against content hash a747ab1dadbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

codex-review scanned grade B 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 7d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

- Do NOT pin `-m` unless the user asks. The user's `~/.codex/config.toml` default model is used. Pinning `gpt-5.x-codex` variants fails on ChatGPT-account auth.
skills/codex-review/SKILL.md · 132 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 7d ago First seen · 132 lines · 271 tokens per session scan B a747ab1dadbe

Subscribe to this mod's changes

codex-review is a skill published in the GitHub repository chaseai-yt/claudex-loop (1,633 stars, last pushed 13d ago), with no licence file. It adds 271 tokens to every session and 2,524 once invoked, about $0.0014 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.