export declare const PROFILE_IMAGE_SOURCE_LIMIT: number;
export declare const PROFILE_IMAGE_OUTPUT_LIMIT: number;
/** Decode/rotate/crop/re-encode once at the infrastructure boundary. */
export declare function squareProfileImage(base64: string): Promise<Buffer>;
/** The URL comes only from an authenticated resource owner, never from upload callers. */
export declare function authorizedStorageURL(raw: string): URL;
/** The path is an already authorized staged-file reference. Bound bytes even if the file changes. */
export declare function readProfileImage(path: string, signal?: AbortSignal): Promise<Buffer>;
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