Use when Claude Code (the driver) should call the user's local Codex CLI as a read-only second reviewer, planner, or oracle for repo diffs, scoped files, risk analysis, code review, PRD/design review, or implementation planning; by default, loop plan review until approved before implementation, then loop diff/QA review until approved, while Claude remains the only agent editing, committing, pushing, or deploying. This is the mirror of the Codex-side `claude-readonly-review` skill.
