Use to run a multi-round cross-model debate on an implementation plan — Claude drafts, Codex (gpt-5.4) critiques against the real codebase, Claude rebuts and synthesizes, optional second Codex pass — converging on a stronger plan. Combines codex-review-plan and review-codex-plan. Trigger phrases include "debate this plan with Codex", "go back and forth with Codex on the plan", "have Claude and Codex argue out the plan".
