export type SelectorValidationResult = {
    success: false;
    error: string;
} | {
    success: true;
    type: "pseudo-class" | "pseudo-element" | "attribute";
};
/**
 * Validates an open CSS state suffix scoped to the current element.
 *
 * Builder states are not a closed component-state enum. Valid pseudo-classes,
 * pseudo-elements, and attribute selectors may be compounded. Descendant and
 * child selectors may follow that state because the CSS engine anchors the
 * complete suffix to the generated instance selector. Selector lists,
 * unanchored selectors, and sibling combinators are rejected.
 * @param selector - The selector to validate (e.g., ":hover", "::before", "[data-state=open]")
 * @returns SelectorValidationResult with success status and type or error message
 */
export declare const validateSelector: (selector: string) => SelectorValidationResult;