Codex Plan Review Runtime Tools When this skill needs user questions, todo/progress tracking, subagents, or another skill, use the active runtime equivalents in RUNTIME TOOLS.md. Independent cross-model review of implementation plans. Codex reviews, the active agent revises spec.md and prd.json directly, you decide when it's good enough. When to Use - After or , before - High-stakes plans: auth, payments, data models, multi-service coordination - Plans that will take days to implement - When you want a genuinely independent perspective (not same-model echo chamber) When to Skip - Simple bug f…