import type { DifyAccessor } from '../../accessor/dify.ts';
import { IndexEntry } from '../../cache/index/config.ts';
import type { IndexCacheStore } from '../../cache/index/store.ts';
export declare function scalarString(value: unknown): string | null;
export declare function ensureTree(accessor: DifyAccessor, index: IndexCacheStore, prefix?: string): Promise<void>;
export declare function buildDirEntries(documents: Record<string, unknown>[], prefix: string, slugMetadataName?: string): Map<string, [string, IndexEntry][]>;
export declare function extractSlug(document: Record<string, unknown>, slugMetadataName?: string): [string, boolean];
export declare function normalizeSlug(value: string): string;
export declare function extractDocumentSize(document: Record<string, unknown>): number | null;
export declare function timestampToIso(value: unknown): string;
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