import type { Ledger } from "./ledger.js";
export declare function ensureFactsSchema(ledger: Ledger): void;
export interface ExtractedFact {
    subject: string;
    predicate: string;
    object: string;
    quote?: string;
}
/** Tolerant parse of the model's JSON fact list. */
export declare function parseFacts(raw: string): ExtractedFact[];
export declare function extractFactsFromMaterial(day: string, material: string, opts?: {
    apiKey?: string;
    fetchImpl?: typeof fetch;
}): Promise<ExtractedFact[]>;
/**
 * Store a day's facts. Non-destructive update: a new fact with the same
 * subject+predicate but a DIFFERENT object closes the old fact's validity
 * (valid_to = new stated_at) and chains it via superseded_by.
 */
export declare function upsertDayFacts(ledger: Ledger, day: string, facts: ExtractedFact[], statedAt: number): number;
export interface FactRow {
    id: number;
    subject: string;
    predicate: string;
    object: string;
    statedDay: string;
    current: boolean;
    supersededOn?: string;
    quote?: string;
    expand?: number;
}
/** Facts matching `query` — current first, superseded history included.
 *  `asOf` (epoch ms) answers "what did we believe THEN". */
export declare function queryFacts(ledger: Ledger, query: string, opts?: {
    limit?: number;
    asOf?: number;
}): FactRow[];