Use when the user types /turbo-review or asks to convene multiple external models at once for a task, research, or review — a "quorum" pass. Fans the same prompt out to codex, opencode, and a fresh claude in parallel (read-only, in the background), then synthesizes their verdicts — flagging consensus (high confidence) and disagreement (needs scrutiny). Use proactively before committing to a risky design, plan, or diff.