/**
 * RiskEngine — pre-trade guardrails the agent must clear before an order
 * touches the exchange. Pure function style: the engine holds only config;
 * Portfolio state is passed in per call so the same engine is reusable.
 *
 * Guardrails enforced (MVP):
 *  - Per-position cap (USD notional any single symbol may hold)
 *  - Total exposure cap (sum of all open positions' notional)
 *  - Cash sufficiency (can't buy what you can't pay for)
 *  - Sell integrity handled by Portfolio itself (no open position → throws)
 *
 * Exit orders (sells of existing positions) bypass exposure caps — a paranoid
 * cap could otherwise trap the agent in a losing position it wants to exit.
 */
import type { Portfolio, Side } from './portfolio.js';
export interface RiskConfig {
    maxPositionUsd: number;
    maxTotalExposureUsd: number;
}
export interface OrderRequest {
    symbol: string;
    side: Side;
    qty: number;
    priceUsd: number;
}
export interface RiskDecision {
    allowed: boolean;
    reason?: string;
}
export declare class RiskEngine {
    private config;
    constructor(config: RiskConfig);
    check(portfolio: Portfolio, order: OrderRequest): RiskDecision;
}