import { Port, NodeId, PortId } from '../../../types/core';
/**
 * Brand symbol for PortKey type safety
 */
declare const PortKeyBrand: unique symbol;
/**
 * Composite key for uniquely identifying a port within an editor
 * Format: `${nodeId}:${portId}`
 * Branded type to prevent accidental assignment of arbitrary strings
 */
export type PortKey = `${string}:${string}` & {
    readonly [PortKeyBrand]: never;
};
/**
 * Create a composite port key from node and port IDs
 */
export declare const createPortKey: (nodeId: NodeId, portId: PortId) => PortKey;
/**
 * Create a composite port key from a Port instance
 */
export declare const getPortKey: (port: Port) => PortKey;
/**
 * Parse a composite port key into node and port IDs
 * Returns null if the key format is invalid
 */
export declare const parsePortKey: (key: PortKey | string) => {
    nodeId: NodeId;
    portId: PortId;
} | null;
export {};