codex

Review code diffs and probe edge cases via the Codex CLI.

Updated Mar 24, 2026
One-click install
npx skills add https://github.com/antriksh-29/reddit-automation --skill codex-antriksh-29
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codex
Source: https://github.com/antriksh-29/reddit-automation/tree/main/.claude/skills/gstack/codex
Command: npx skills add https://github.com/antriksh-29/reddit-automation --skill codex-antriksh-29

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Independent, brutally honest second opinions on code changes and project plans by interfacing with the Codex CLI across Review, Challenge, and Consult modes. It helps catch edge cases, security concerns, and design gaps early by providing an external perspective.

Core Features & Use Cases

  • Review mode: analyzes diffs against the base branch and returns a PASS/FAIL verdict with a gate and token usage data.
  • Challenge mode: probes edge cases, adversarial scenarios, and potential failure modes to stress-test changes.
  • Consult mode: prompts Codex about plans, questions, or architecture decisions, maintaining session continuity where applicable.

Quick Start

Run /codex in your terminal to get a brutal second opinion on the current diffs or project plan.

Frequently Asked Questions about codex

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

FAQPage Schema
How do I get an automated second opinion on code diffs before merging?

To get an automated second opinion on code diffs, you can use the Review mode to analyze changes against your base branch and receive a PASS/FAIL verdict with token usage data. It interfaces directly with the Codex CLI to provide an independent, brutally honest assessment.

What is adversarial code review and how does it probe edge cases?

Adversarial code review actively probes edge cases, adversarial scenarios, and potential failure modes to stress-test your changes. The Challenge mode implements this by using the Codex CLI to identify design gaps and security concerns early in development.

Can I use Codex to consult on architecture decisions and project plans?

Yes, you can use the Consult mode to prompt Codex about project plans, architecture decisions, or specific questions. It maintains session continuity where applicable to provide an independent, external perspective on your project strategy.

How do I log code review telemetry and token costs for CLI operations?

You can log code review telemetry and token costs by running CLI operations that enforce timeouts and emit structured JSONL outputs. This implementation supports token-cost reporting, making the telemetry data suitable for logging and downstream analysis.

Does automated code review work without external dependencies?

Yes, automated code review works without external dependencies, as the implementation specifies an empty dependency list. It operates entirely via command-line execution, enforcing timeouts and generating structured outputs for telemetry and logging.