import { z } from 'zod';
import type { AnyExtractor } from '../types.js';
export declare const FACTS_EXTRACTOR_SLUG = "facts";
declare const factsSchema: z.ZodObject<{
    facts: z.ZodArray<z.ZodString>;
}, z.core.$strip>;
export type FactsValue = z.infer<typeof factsSchema>;
export interface FactsExtractorOptions {
    maxFacts?: number;
    charLimit?: number;
}
/** Built-in cross-session fact memory — LLM merge via `includePrevious`, shaped in `onExtracted`. */
export declare function factsExtractor(options?: FactsExtractorOptions): AnyExtractor;
export {};