/**
 * [WHO]: readJson, writeJson, deriveNameFromContent, deriveSummaryFromContent, ensureDir
 * [FROM]: Depends on node:fs, node:fs/promises, node:path, ./types.js
 * [TO]: Consumed by packages/mem-core/src/index.ts
 * [HERE]: packages/mem-core/src/store.ts - persistence layer for JSON storage, all other modules go through here
 */
import type { Episode, MemoryEntry, Meta, WorkEntry } from "./types.js";
export declare function readJson<T>(path: string, fallback: T): Promise<T>;
export declare function writeJson(path: string, data: unknown): Promise<void>;
/** Derive a short name (≤30 chars) from content text */
declare function deriveNameFromContent(content: string): string;
/** Derive a summary (≤150 chars) from content text, breaking at sentence boundary */
declare function deriveSummaryFromContent(content: string): string;
export declare function loadEntries(path: string): Promise<MemoryEntry[]>;
export declare function saveEntries(path: string, entries: MemoryEntry[], max: number, utilityFn: (e: MemoryEntry) => number): Promise<void>;
export declare function loadEpisodes(episodesDir: string): Promise<Episode[]>;
export declare function saveEpisode(episodesDir: string, ep: Episode): Promise<void>;
export declare function loadWork(path: string): Promise<WorkEntry[]>;
export declare function saveWork(path: string, entries: WorkEntry[], max: number, utilityFn: (w: WorkEntry) => number): Promise<void>;
export declare function loadMeta(path: string): Promise<Meta>;
export { deriveNameFromContent, deriveSummaryFromContent };