/**
 * Process-wide controls for outbound HTML and image requests.
 *
 * The secure HTTP agents bound sockets per origin. This limiter adds a global
 * ceiling so callers cannot bypass the bound by spreading requests over many
 * different origins. The deadline is intentionally separate from Axios'
 * socket-inactivity timeout and covers queue wait plus the complete response.
 */
export declare class NetworkRequestDeadlineError extends Error {
    readonly timeoutMs: number;
    constructor(timeoutMs: number);
}
export declare class NetworkRequestAbortedError extends Error {
    constructor(message?: string);
}
export declare class NetworkRequestQueueFullError extends Error {
    constructor();
}
/**
 * Run one outbound request under a total wall-clock deadline and the shared
 * process-wide concurrency limit.
 */
export declare function runControlledNetworkRequest<T>(timeoutMs: number, callerSignal: AbortSignal | undefined, request: (signal: AbortSignal) => Promise<T>): Promise<T>;
declare function resetLimiterForTests(): void;
/** Test-only limiter visibility; omitted at runtime outside NODE_ENV=test. */
export declare const __testNetworkRequestLimiter: {
    getStats: () => {
        active: number;
        queued: number;
        activeLimit: number;
        queuedLimit: number;
    };
    reset: typeof resetLimiterForTests;
} | undefined;
export {};