export declare const STRONG_SNAPSHOT_MAX_BYTES: number;
type MetadataSnapshot = {
    size: number;
    mtimeMs: number;
    tokenType: "metadata";
};
type StrongSnapshot = {
    size: number;
    mtimeMs: number;
    tokenType: "strong";
    contentHash: string;
};
type FileSnapshot = MetadataSnapshot | StrongSnapshot;
export declare function readFileSnapshot(filePath: string): FileSnapshot | undefined;
export declare function snapshotsMatch(left: FileSnapshot, right: FileSnapshot | undefined): boolean;
export type { FileSnapshot };