/**
 * @fileoverview API Client Health Check Implementation
 * @module @skillsmith/core/api/client.health
 * @see SMI-1244: API client for fetching skills from live Supabase endpoints
 * @see SMI-2741: Split from client.ts to meet 500-line standard
 *
 * Health check utility extracted from SkillsmithApiClient to keep
 * client.ts under the 500-line standard.
 */
/**
 * Check API health status
 *
 * Standalone implementation used by SkillsmithApiClient.checkHealth().
 * Returns a synthetic healthy response in offline mode.
 *
 * @param baseUrl - API base URL
 * @param anonKey - Supabase anon key
 * @param offlineMode - Whether client is in offline mode
 * @returns Health status object
 */
export declare function checkApiHealth(baseUrl: string, anonKey: string | undefined, offlineMode: boolean): Promise<{
    status: 'healthy' | 'degraded' | 'unhealthy';
    timestamp: string;
    version: string;
}>;
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