adversarial-review

adversarial-review is a command for Claude Code from openai/codex-plugin-cc. It costs 13 tokens per session (845 once invoked), scanned A, original, Apache-2.0.

A command for running a Codex review that challenges an implementation's approach, design choices, assumptions, and tradeoffs. It only reviews the work and does not change it.

In plain words
What is it for?
Use it to question an implementation before shipping, examine its assumptions, and identify risks in the design without applying fixes.
Why use it?
A normal defect review may miss problems in the overall plan. This review provides a separate challenge to whether the chosen solution is appropriate.

Command for Claude Code ✓ vendor

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the AskUserQuestion tool; mentions Claude Code; mentions Codex.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the codex plugin — 3 skills, 8 commands, 1 agent, 3 hooks shipped together

Good fit Use it to question an implementation before shipping, examine its assumptions, and…

Compare 6 commands from other repositories ↓
About the project

Codex plugin for Claude Code brings Codex into Claude Code so users can request code reviews or delegate tasks from that existing workflow. It is for Claude Code users with a ChatGPT subscription or OpenAI API key who want commands for reviews, handoffs, background jobs, and session management. The catalogue entries are the plugin's commands, skills, hooks, and agent.

openai/codex-plugin-cc · 32,807 stars · on GitHub

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add openai/codex-plugin-cc
Claude Code
/plugin install codex

Made for: Claude Code.

Or install codex, the plugin that ships this one along with the rest of its 3 skills, 8 commands, 1 agent, 3 hooks.

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 adversarial-review

README.md
[![agentmods](https://agentmods.dev/badge/commands/openai/codex-plugin-cc/adversarial-review.svg)](https://agentmods.dev/commands/openai/codex-plugin-cc/adversarial-review)
Your own site
<a href="https://agentmods.dev/commands/openai/codex-plugin-cc/adversarial-review"><img src="https://agentmods.dev/badge/commands/openai/codex-plugin-cc/adversarial-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 845 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.
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 $0.00013 $0.00845
Opus 5 $0.00006 $0.00423
Sonnet 5 $0.00003 $0.00169
Haiku 4.5 $0.00001 $0.00085

Measured 7d ago against content hash 6c6ec17b0dcc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

adversarial-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 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.

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.

Origin

Copies of this mod

8 near-identical copies found in the catalogue:

plugins/codex/commands/adversarial-review.md · 67 lines

What it actually says

Run an adversarial Codex review through the shared plugin runtime. Position it as a challenge review that questions the chosen implementation, design choices, tradeoffs, and assumptions. It is not just a stricter pass over implementation defects.

Raw slash-command arguments: $ARGUMENTS

Core constraint:

  • This command is review-only.
  • Do not fix issues, apply patches, or suggest that you are about to make changes.
  • Your only job is to run the review and return Codex's output verbatim to the user.
  • Keep the framing focused on whether the current approach is the right one, what assumptions it depends on, and where the design could fail under real-world conditions.

Execution mode rules:

  • If the raw arguments include --wait, do not ask. Run in the foreground.
  • If the raw arguments include --background, do not ask. Run in a Claude background task.
  • Otherwise, estimate the review size before asking:
    • For working-tree review, start with git status --short --untracked-files=all.
    • For working-tree review, also inspect both git diff --shortstat --cached and git diff --shortstat.
    • For base-branch review, use git diff --shortstat <base>...HEAD.
    • Treat untracked files or directories as reviewable work for auto or working-tree review even when git diff --shortstat is empty.
    • Only conclude there is nothing to review when the relevant scope is actually empty.
    • Recommend waiting only when the scoped review is clearly tiny, roughly 1-2 files total and no sign of a broader directory-sized change.
    • In every other case, including unclear size, recommend background.
    • When in doubt, run the review instead of declaring that there is nothing to review.
  • Then use AskUserQuestion exactly once with two options, putting the recommended option first and suffixing its label with (Recommended):
    • Wait for results
    • Run in background

Argument handling:

  • Preserve the user's arguments exactly.
  • Do not strip --wait or --background yourself.
  • Do not weaken the adversarial framing or rewrite the user's focus text.
  • The companion script parses --wait and --background, but Claude Code's Bash(..., run_in_background: true) is what actually detaches the run.
  • /codex:adversarial-review uses the same review target selection as /codex:review.
  • It supports working-tree review, branch review, and --base <ref>.
  • It does not support --scope staged or --scope unstaged.
  • Unlike /codex:review, it can still take extra focus text after the flags.

Foreground flow:

  • Run:
node "${CLAUDE_PLUGIN_ROOT}/scripts/codex-companion.mjs" adversarial-review "$ARGUMENTS"
  • Return the command stdout verbatim, exactly as-is.
  • Do not paraphrase, summarize, or add commentary before or after it.
  • Do not fix any issues mentioned in the review output.

Background flow:

  • Launch the review with Bash in the background:
Bash({
  command: `node "${CLAUDE_PLUGIN_ROOT}/scripts/codex-companion.mjs" adversarial-review "$ARGUMENTS"`,
  description: "Codex adversarial review",
  run_in_background: true
})
  • Do not call BashOutput or wait for completion in this turn.
  • After launching the command, tell the user: "Codex adversarial review started in the background. Check /codex:status for progress."
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 · 67 lines · 13 tokens per session scan A 6c6ec17b0dcc

Subscribe to this mod's changes

adversarial-review is a command published in the GitHub repository openai/codex-plugin-cc (32,807 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 845 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.