/**
 * Root types that selector engines can query against.
 */
export type SelectorRoot = Element | Document | ShadowRoot;
/**
 * Selector engine interface.
 * Each selector engine can query elements using its specific selector syntax.
 */
export interface SelectorEngine {
    /**
     * Engine name for selector syntax (e.g., 'css', 'xpath', 'role', 'text')
     */
    readonly name: string;
    /**
     * Query a single element matching the selector
     */
    query(root: SelectorRoot, selector: string): Element | null;
    /**
     * Query all elements matching the selector
     */
    queryAll(root: SelectorRoot, selector: string): Element[];
}
/**
 * Selector engine registry
 */
export declare class SelectorEngineRegistry {
    private engines;
    register(engine: SelectorEngine): void;
    get(name: string): SelectorEngine | undefined;
    has(name: string): boolean;
    names(): string[];
}
/**
 * Parse a selector string into engine name and selector body.
 * Supports syntax like: "css=.class", "text=Hello", "role=button", "internal:has=button"
 * If no engine prefix, defaults to CSS.
 */
export declare function parseSelector(selector: string): {
    engine: string;
    body: string;
};
/**
 * Global selector engine registry
 */
export declare const selectorEngines: SelectorEngineRegistry;
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