install-codex

name	install-codex
description	Install the Codex CLI on a target machine and verify it can start successfully.

Install Codex CLI

Goal: make the target machine provide a working codex command and verify that the CLI can start successfully.

Follow this process:

• Check whether codex already exists and what version is installed.
• Install or upgrade the Codex CLI using an officially supported method.
• Verify codex --version afterward, and add a minimal auth check if needed.
• If network, Python, Node, or system dependencies block installation, record the exact blocker and avoid leaving a half-installed state.