export declare function sha256(value: string | Buffer): string;
export declare function canonicalJson(value: unknown): string;
export declare function hashObject(value: unknown): string;
export declare function readText(path: string): string;
export declare function readJson<T>(path: string): T;
export declare function prettyJson(value: unknown): string;
export declare function fileHash(path: string): string | null;
export declare function safePath(root: string, relativePath: string): string;
export declare function atomicWrite(path: string, content: string): void;
/** Write a receipt exactly once and make both file and parent directory durable. */
export declare function durableWriteOnce(path: string, content: string, mode?: number): void;
export declare function assertCurrentHash(path: string, expected: string | null): void;
export declare function withoutHash<T extends {
    planHash: string;
}>(value: T): Omit<T, "planHash">;
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