export type AgentNativeRouteWarmupStrategy = "off" | "marked" | "intent" | "render" | "viewport";
export interface AgentNativeRouteWarmupResolvedConfig {
    /**
     * How unmarked internal route links are warmed.
     *
     * Links can opt in/out individually with `data-an-prefetch`:
     * - `render`: warm as soon as the link renders.
     * - `intent`: warm on hover/focus/touch.
     * - `viewport`: warm when the link scrolls into view.
     * - `none`: never warm this link.
     */
    strategy: AgentNativeRouteWarmupStrategy;
    /** Warm React Router `.data` URLs with ordinary fetches. */
    data: boolean;
    /** Warm matched route JS chunks with `modulepreload`. */
    modules: boolean;
    /** Selector for links explicitly marked for render-time warmup. */
    selector: string;
    /** Maximum concurrent `.data` fetches. */
    maxConcurrent: number;
}
export type AgentNativeRouteWarmupConfigInput = boolean | AgentNativeRouteWarmupStrategy | Partial<AgentNativeRouteWarmupResolvedConfig>;
export declare const DEFAULT_AGENT_NATIVE_ROUTE_WARMUP_SELECTOR = "a[data-an-prefetch=\"render\"][href]";
export declare const DEFAULT_AGENT_NATIVE_ROUTE_WARMUP_CONFIG: AgentNativeRouteWarmupResolvedConfig;
export declare function isAgentNativeRouteWarmupStrategy(value: unknown): value is AgentNativeRouteWarmupStrategy;
export declare function normalizeAgentNativeRouteWarmupConfig(input?: AgentNativeRouteWarmupConfigInput | undefined): AgentNativeRouteWarmupResolvedConfig;
export declare function mergeAgentNativeRouteWarmupConfig(baseInput: AgentNativeRouteWarmupConfigInput | undefined, overrideInput: AgentNativeRouteWarmupConfigInput | undefined): AgentNativeRouteWarmupResolvedConfig;
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