export declare class ImmutableFileConflictError extends Error {
    constructor(path: string);
}
export interface StableDirectory {
    readonly path: string;
    assertUnchanged(): void;
    close(): void;
}
export declare function openStableDirectory(path: string, label: string): StableDirectory;
export declare function readImmutableFile(path: string, maxBytes?: number): Buffer;
export declare function writeImmutableFile(path: string, bytes: Buffer): "created" | "replayed";
export declare function assertFileInside(directory: StableDirectory, path: string): void;