/**
 * Unified credential masking utility for CLI setup commands.
 *
 * Preserves known provider prefixes (sk-, sk-ant-, AIza, AKIA) so
 * users can identify which key is configured, while hiding the secret
 * portion with asterisks.
 *
 * @param credential - Raw API key or secret
 * @returns Masked string, e.g. "sk-****abcd"
 */
export declare function maskCredential(credential: string): string;