codex

Name: codex
Availability: InStock
Author: jonolsenca

Review code diffs with Codex CLI and output a GATE verdict.

Updated Aug 27, 2026

Search Tags:#cli #codex #ai #review #code-review #software-engineering #second-opinion

Ready to run

npx skills add https://github.com/JonOlsenCa/gstack-main --skill codex-jonolsenca

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: codex
Source: https://github.com/JonOlsenCa/gstack-main/tree/main/codex
Command: npx skills add https://github.com/JonOlsenCa/gstack-main --skill codex-jonolsenca

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Provides an independent, brutally honest second opinion on code changes using the Codex CLI, helping teams avoid blind spots and improve review quality.

Core Features & Use Cases

Independent second opinion on diffs and proposed changes with codex review, codex challenge, and consult modes.
Gate-based outputs that surface a pass/fail verdict, token usage, and approximate cost to help stakeholders decide next steps.
Works inside existing workflows with base-branch or plan context, enabling structured code quality feedback on PRs and feature ideas.

Quick Start

Run codex in review mode on the current diff to obtain an independent assessment.

Frequently Asked Questions about codex

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

FAQPage Schema

How do I get an independent AI second opinion on a code review?▼

To get an AI second opinion on a code review, run the Codex CLI in review mode on your current diff. It compares changes against the base branch to provide a brutally honest, independent assessment of your code.

What is a gate-style verdict in automated code review?▼

A gate-style verdict in automated code review is a structured pass or fail decision. It surfaces the approval status alongside token usage and approximate cost estimates to help stakeholders decide next steps.

How do I challenge proposed code changes against a project plan?▼

To challenge proposed code changes against a project plan, use the Codex CLI in challenge mode. It detects plan scope from your input and evaluates whether the code diff aligns with the intended design.

Can I use AI code review without additional dependencies?▼

Yes, you can use this AI code review tool without additional dependencies. It operates independently within your existing workflows, respecting filesystem boundaries while analyzing diffs.

What is the difference between review, challenge, and consult modes for code analysis?▼

Review mode assesses current diffs, challenge mode questions changes against a project plan, and consult mode provides broader feedback. The CLI detects the appropriate mode from your input to deliver structured code quality reports.

How do I estimate token usage and cost for an AI code review?▼

To estimate token usage and cost for an AI code review, run the CLI and check the structured report. It automatically calculates and delivers approximate cost and token metrics alongside the gate verdict.