/**
 * Diagnostics service for system health checks
 */
import type { DiagnosticResult, DiagnosticStatus } from '../types/diagnostics.types.js';
export type { DiagnosticResult, DiagnosticStatus };
export declare class DiagnosticsService {
    /**
     * Check if configuration file exists and is valid
     */
    checkConfigFile(): Promise<DiagnosticResult>;
    /**
     * Check if at least one provider is configured
     */
    checkProviderAccess(): Promise<DiagnosticResult>;
    /**
     * Check if API keys are present in configuration
     */
    checkApiKeys(): Promise<DiagnosticResult>;
    /**
     * Check environment variables
     */
    checkEnvironmentVariables(): DiagnosticResult;
    /**
     * Validate configuration schema
     */
    checkConfigValidation(): Promise<DiagnosticResult>;
    /**
     * Run all diagnostic checks
     */
    runAllChecks(): Promise<DiagnosticResult[]>;
    /**
     * Attempt to auto-fix a diagnostic issue
     */
    autoFix(diagnostic: DiagnosticResult): boolean;
    /**
     * Extract error message from unknown error type
     */
    private extractErrorMessage;
}
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