Codex Plan Reviewer

Purpose

Use OpenAI Codex CLI as an adversarial reviewer for markdown plan files authored by Claude Code. The two models engage in a structured review loop: Codex critiques the plan, Claude Code evaluates each piece of feedback, applies what's valid, escalates disagreements to the user, and resubmits until Codex approves — or the loop cap is reached.

This creates a cross-model checks-and-balances system where neither model operates unchecked.

Prerequisites

• codex CLI installed and authenticated (npm install -g @openai/codex or equivalent)
• The plan must be a markdown file (.md) accessible in the working directory or a provided path

Before starting, verify codex is available:

command -v codex >/dev/null 2>&1 || { echo "ERROR: codex CLI not found. Install with: npm install -g @openai/codex"; exit 1; }