/**
 * PortPool — allocates ports from a [min, max] range, checks OS for collisions.
 */
/**
 * Allocates TCP ports from a `[min, max]` range with OS-level collision detection.
 * Used by service connector adapters (devserver, static-server) to assign local ports.
 * @docLink packages/connectors/api-reference#port-pool
 */
export declare class PortPool {
    private readonly min;
    private readonly max;
    private readonly inUse;
    constructor(range: [number, number]);
    /** Allocate the next free port from the range. Checks OS for collisions. */
    allocate(): Promise<number>;
    /** Mark a port as in-use (for explicit port args or registered instances). */
    reserve(port: number): void;
    /** Return a port to the pool. */
    release(port: number): void;
    /** Check if a port is currently tracked as in-use. */
    isInUse(port: number): boolean;
    /** Quick TCP connect test — returns true if nothing is listening. */
    static isPortFree(port: number, host?: string): Promise<boolean>;
}
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