import type { ContentPart } from '../types.js';
/**
 * Extract plain text from a user message for tool filtering / preview.
 *
 * Accepts either a plain string or a multimodal `ContentPart[]` array;
 * in the latter case only the `text` parts are concatenated.
 */
export declare function userMessageToFilterText(message: string | ContentPart[]): string;
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