export declare function stableDigest(value: unknown): string;
export declare function canonicalJson(value: unknown): string;
export declare function fileSha256(path: string): string;
export declare function writeImmutableJson(path: string, value: unknown): boolean;
export declare function fsyncParentDirectory(path: string): void;
export declare function readJsonRecord<T>(path: string, label: string): T;
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