import type { MemoryIndex } from '../types.js';
export declare function readMemoryFileMtime(filePath: string): string;
export declare function readStoredMemoryNames(memoryDir: string): Set<string>;
/**
 * Build the hot/warm index object from the current `.peaks/memory/` contents
 * without touching disk. Pure read + in-memory assembly; `generateMemoryIndexFile`
 * serializes the result. Exposed so `peaks memory reindex` can reuse the exact
 * same entry construction for its counts + `MEMORY.md` regeneration instead of
 * duplicating it.
 */
export declare function buildMemoryIndex(projectRoot: string): MemoryIndex;
export declare function generateMemoryIndexFile(projectRoot: string, memoryDir: string, indexPath: string, prebuilt?: MemoryIndex): void;
export declare function readExistingIndex(indexPath: string): MemoryIndex | null;
export declare function readMemoryIndex(projectRoot: string): MemoryIndex | null;