/codex-review — Independent second opinion from Codex CLI

Argument: $ARGUMENTS — one of plan | diff | spec | last-response. Default last-response.

Never fall back to reviewing Claude's own output if Codex fails. If Codex can't run, say so and stop.

1. Preflight

Run in order. Stop cleanly on first failure:

command -v codex >/dev/null 2>&1 || { echo "codex CLI not found. Install: https://github.com/openai/codex"; exit 0; }
codex login status 2>&1 | grep -qi "logged in" || { echo "codex not logged in. Run: codex login"; exit 0; }

2. Resolve target