import type { RouterConfig, RouterResult } from "./types.js";
export declare class Router {
    private config;
    private classifier;
    private mode;
    private threshold;
    private minUpgrade;
    private minDowngrade;
    private fallbackTierIndex;
    constructor(config: RouterConfig);
    route(query: string): Promise<RouterResult>;
    private validateModels;
    private validateProbability;
    private resolveStrategy;
    private resolveFallbackModel;
}
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