/**
 * PredictionMarket — unified access to Polymarket / Kalshi / Limitless /
 * Opinion / Predict.Fun / cross-platform / smart-money / wallet endpoints
 * via the BlockRun gateway. Each call settles via x402 against the user's
 * USDC wallet.
 *
 * Powered server-side by Predexon; surfaced to the agent as a single
 * action-dispatched tool so the inventory stays small. Keep one cohesive
 * tool — the way TradingMarket bundles 6 actions — instead of forty
 * one-shot capabilities, otherwise weak models start hallucinating tool
 * names.
 *
 *   searchAll          $0.005  search markets across Polymarket+Kalshi+
 *                              Limitless+Opinion+Predict.Fun in one call
 *   searchPolymarket   $0.001  query Polymarket markets (event filter, sort)
 *   searchKalshi       $0.001  query Kalshi markets
 *   crossPlatform      SUNSET  Predexon discontinued market matching
 *                              2026-07-20 (upstream 410; gateway de-registered
 *                              it 2026-08-03). Kept as a zero-cost tombstone
 *                              that steers callers to searchAll, whose
 *                              canonical containers already span venues.
 *   leaderboard        $0.001  global Polymarket leaderboard — top wallets by P&L
 *   walletProfile      $0.005  full Polymarket wallet profile (single wallet)
 *                              or batch profiles (comma-separated wallets)
 *   walletPnl          $0.005  P&L summary + realized P&L time series for one
 *                              Polymarket wallet
 *   walletPositions    $0.005  open + historical positions for one Polymarket
 *                              wallet
 *   smartActivity      $0.005  discover markets where high-performing wallets
 *                              are active right now
 *   smartMoney         $0.005  smart-money positioning on one Polymarket
 *                              condition_id (per-market drill-down)
 *
 * Output is filtered + truncated on the way back so a single call never
 * dumps 100 markets into the agent's context. Default 20 rows; agents that
 * need more should narrow the search.
 */
import type { CapabilityHandler } from '../agent/types.js';
export declare const predictionMarketCapability: CapabilityHandler;