import { DirEntry, IFileSystem } from '../../domain/interfaces';
export declare class OverlayFileSystem implements IFileSystem {
    private readonly fallback;
    private readonly root;
    private readonly files;
    constructor(overlayRoot: string, files: Record<string, string>, fallback: IFileSystem);
    private absKey;
    private isOverlay;
    readFile(filePath: string): Promise<string>;
    readFileBuffer(filePath: string): Promise<Buffer>;
    readJson<T = unknown>(filePath: string): Promise<T>;
    exists(filePath: string): Promise<boolean>;
    existsSync(filePath: string): boolean;
    private existsInOverlay;
    readdir(dirPath: string): Promise<DirEntry[]>;
    readdirNames(dirPath: string): Promise<string[]>;
    private readdirOverlay;
    stat(filePath: string): Promise<{
        isDirectory: () => boolean;
        isFile: () => boolean;
    }>;
    writeFile(filePath: string, content: string): Promise<void>;
    writeJson(filePath: string, content: unknown): Promise<void>;
    mkdir(dirPath: string): Promise<void>;
    ensureDir(dirPath: string): Promise<void>;
    ensureFile(filePath: string): Promise<void>;
    copy(src: string, dest: string): Promise<void>;
    remove(filePath: string): Promise<void>;
}