Dev.to
7/17/2026
Using Codex CLI as an independent cross-model reviewer inside Claude Code sessions
Original: "My AI engineer has a second AI that tells it NO. Three times, it was right."
Short summary
The author uses Claude Code as a primary AI engineer and OpenAI's Codex CLI as an independent read-only reviewer that tries to refute changes before they ship. Codex caught three concrete bugs that Claude missed because same-model review shares blind spots. The setup includes a policy in Claude's global config allowing it to call Codex autonomously for risky changes, with a budget of roughly two runs per task.
- •Claude Code writes code; Codex CLI independently reviews diffs in read-only mode
- •Cross-model review caught three real bugs that same-model review missed
- •Policy-driven: Claude autonomously decides when to invoke Codex, capped at ~2 runs per task
Generated with AI, which can make mistakes.
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