codex-review

codex-review is a plugin for Claude Code from jasonm4130/claude-skills. Its manifest loads nothing; the 1 skill it bundles cost 166 tokens per session together, scanned A, original, MIT.

A review add-on that sends plans or design documents to OpenAI Codex for an adversarial review, meaning it looks for weaknesses and challenges in the proposal.

In plain words
What is it for?
Reviewing implementation plans and design documents before development begins.
Why use it?
It adds a separate review step for important technical decisions and records the resulting decision gates across repositories.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Codex.

Good fit Reviewing implementation plans and design documents before development begins.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add jasonm4130/claude-skills/plugin install 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.

Clone the repo
git clone --depth 1 https://github.com/jasonm4130/claude-skills

Made for: Claude Code.

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/plugins/jasonm4130/claude-skills/codex-review.svg)](https://agentmods.dev/plugins/jasonm4130/claude-skills/codex-review)
Your own site
<a href="https://agentmods.dev/plugins/jasonm4130/claude-skills/codex-review"><img src="https://agentmods.dev/badge/plugins/jasonm4130/claude-skills/codex-review.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 166 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
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 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.

plugins/codex-review/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "name": "codex-review",
  "description": "Cross-provider adversarial plan/design-doc review via OpenAI Codex (GPT-5.6 Terra): verdict-loop protocol, atomic chain guard, cross-repo decision-gate log.",
  "version": "0.5.5",
  "author": {
    "name": "Jason Matthew",
    "email": "[email protected]"
  },
  "homepage": "https://github.com/jasonm4130/claude-skills",
  "repository": "https://github.com/jasonm4130/claude-skills",
  "license": "MIT",
  "keywords": ["claude-code", "codex", "cross-provider", "plan-review", "design-review", "adversarial-review"]
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 166 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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 Changed bb79853e0917
  2. 7d ago First seen · 14 lines scan A b871fc7bd957

Subscribe to this mod's changes

codex-review is a plugin published in the GitHub repository jasonm4130/claude-skills (5 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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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