/**
 * x-tooltip Directive Runtime
 *
 * Provides a lightweight tooltip directive for the signals runtime.
 * Uses event delegation with a single shared tooltip element.
 *
 * Usage:
 *   <button x-tooltip="Save changes">Save</button>
 *   <button x-tooltip="Delete item" x-tooltip-position="bottom">Delete</button>
 *   <span x-tooltip="Copy to clipboard" x-tooltip-position="left">Copy</span>
 *   <span x-tooltip="More info" x-tooltip-position="right">Info</span>
 *
 * Positions: top (default), bottom, left, right
 * Override with x-tooltip-position attribute.
 *
 * @module builtins/tooltip
 */
export declare function getTooltipRuntime(): string;
