/**
 * Adapter Health Check - verify connectivity to LLM providers.
 *
 * Checks each configured adapter by sending a minimal probe request.
 */
export interface AdapterHealthResult {
    name: string;
    status: 'connected' | 'error' | 'unconfigured';
    models?: string[];
    error?: string;
    latency_ms?: number;
}
export interface HealthCheckResult {
    adapters: AdapterHealthResult[];
    timestamp: string;
}
/**
 * Run health checks against all known adapters.
 */
export declare function checkHealth(env?: Record<string, string | undefined>): Promise<HealthCheckResult>;
/**
 * Format health check results for console output.
 */
export declare function formatHealth(result: HealthCheckResult): string;
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