codex

Run OpenAI Codex CLI against the current diff to review code changes.

Updated Mar 11, 2026
One-click install
npx skills add https://github.com/jkhowland/jkhowland --skill codex-jkhowland
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codex
Source: https://github.com/jkhowland/jkhowland/tree/main/.claude/skills/gstack/codex
Command: npx skills add https://github.com/jkhowland/jkhowland --skill codex-jkhowland

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Codex as a second-opinion tool for code changes by running the Codex CLI against the current diff, delivering an independent assessment.

Core Features & Use Cases

  • Independent code review: runs against the current branch diff to gate changes.
  • Adversarial testing: performs a challenge mode to identify edge cases and failure modes.
  • Prompt & plan assistance: consults Codex to generate prompts or plans for further work.

Quick Start

Run the /codex skill against your current branch to obtain an independent second opinion on the changes.

Frequently Asked Questions about codex

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automate an independent code review on my current branch diff?

Automate an independent code review by running the Codex CLI against your current branch diff, which returns verbatim output and a gate verdict to validate your changes.

What is adversarial code testing and how does it identify edge cases?

Adversarial code testing uses challenge mode to aggressively test your changes, identifying edge cases and failure modes by running the Codex CLI against the current diff.

Do I need the Codex CLI installed to run automated code analysis?

Yes, you need the Codex CLI installed to run automated code analysis, as the tool executes the CLI against your diff and returns its verbatim output.

Can I use Codex consult mode to generate prompts and plan further code changes?

Yes, you can use consult mode to generate prompts and plan further code changes by consulting Codex directly through the CLI integration.

What are the timeout limitations when running Codex for code review?

The timeout limitation for running Codex code review is 5 minutes, after which the automated analysis against your branch diff will terminate and return results.

What is the best way to get a second opinion on code changes before merging?

The best way to get a second opinion on code changes is using review mode, which runs the Codex CLI against your current diff to deliver an independent assessment and gate verdict.