codex

Wrap the Codex CLI to review diffs and surface flaws before merging.

Updated Aug 27, 2026
One-click install
npx skills add https://github.com/steffenpharai/StartupFramework --skill codex-steffenpharai
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codex
Source: https://github.com/steffenpharai/StartupFramework/tree/main/.claude/skills/gstack/codex
Command: npx skills add https://github.com/steffenpharai/StartupFramework --skill codex-steffenpharai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Provides an independent, brutally honest second opinion on code changes by wrapping the OpenAI Codex CLI to evaluate diffs, surface gaps, and suggest improvements before merging.

Core Features & Use Cases

  • Review: perform a structured code review against the base branch with gate-based verdicts.
  • Challenge: run adversarial checks to uncover edge cases, robustness issues, and potential failures.
  • Consult: ask Codex for focused prompts or planning questions with session continuity for follow-ups.

Quick Start

Run /codex review on the current branch to obtain an independent verdict 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 get an independent code review on a pull request before merging?

You can get an independent code review by running the tool against your current branch. It evaluates diffs against the base branch and provides a structured verdict using gate-based checks before merging.

Can I run adversarial checks to uncover edge cases in my code changes?

Yes, you can run adversarial checks using Challenge mode. It executes targeted checks against your code changes to actively uncover edge cases, robustness issues, and potential failures before they reach production.

How does an independent second opinion improve code correctness and security?

An independent second opinion improves code correctness and security by evaluating diffs to surface gaps and propose improvements. It wraps the Codex CLI to assess changes across repositories and CI workflows.

Does this code review tool support CI workflows and cost tracking?

Yes, the tool supports CI workflows and surfaces token usage alongside streaming traces. This enables auditable, cost-aware decisions by providing visibility into the resources consumed during the code evaluation process.

Can I ask follow-up design questions after reviewing my code diff?

Yes, you can ask follow-up design questions using Consult mode. It provides focused prompts or planning questions with session continuity, allowing you to maintain context when exploring code correctness, security, and design.