function crossSightScore(
  perp: PerpMark,
  pred: PolymarketProb,
  opt: OptionIV,
): Divergence {
  const implied = optionsImpliedProb(opt.strike, opt.iv, opt.expiry);
  const dPerpPred = Math.abs(perp.markBias - pred.yesProb);
  const dOptPred  = Math.abs(implied - pred.yesProb);
  const score = (dPerpPred * 0.6 + dOptPred * 0.4) * 100;

  return {
    score,
    venues: [perp.venue, pred.venue, opt.venue],
    edgeBps: score > 70 ? estimateEdge(perp, pred, opt) : 0,
    ts: Date.now(),
  };
}

function routeOrder(intent: TradeIntent): Promise<OrderResult> {
  const venue = pickVenue(intent.size, intent.urgency);
  return executeWithBuilderCode(venue, intent, BUILDER_BPS);
}