export declare function normalizeUrl(u: string): string;
/** Deterministic ID: sha256(normalized URL) */
export declare function computeIdFromUrl(url: string): string;
export declare function getHostSafe(u: string): string | undefined;
export declare function sha256Hex(s: string): string;
/** ISO-8601 year/week (1–53) */
export declare function isoYearWeek(d: Date): {
    year: number;
    week: number;
};
/** Robust S3 Body → Buffer: prefers Smithy mixin, falls back to Node stream */
export declare function s3BodyToBuffer(body: any): Promise<Buffer>;
/** Always expect gzip (we always write gzip). If header missing, still try gunzip. */
export declare function gunzipStrict(buf: Buffer, contentEncoding?: string): Buffer;
export declare function clamp(n: number, min: number, max: number): number;
export declare function isConditionalCheckFailed(err: any): boolean;
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