import type { MCPServerRegistry } from './registry';
/**
 * Health check and auto-restart manager for MCP servers.
 *
 * Provides:
 * - Periodic health checks at configurable intervals
 * - Auto-restart with exponential backoff on connection loss
 * - Tool re-discovery after successful reconnection
 */
export declare class MCPHealthManager {
    private timers;
    private retryState;
    private reconnectInFlight;
    /**
     * Start periodic health check for a server.
     *
     * Checks client.isConnected() at specified interval and triggers
     * reconnect if disconnected.
     *
     * @param registry - MCP server registry
     * @param serverId - Server identifier
     * @param intervalMs - Health check interval in milliseconds
     */
    startHealthCheck(registry: MCPServerRegistry, serverId: string, intervalMs: number): void;
    /**
     * Stop health check for a specific server.
     *
     * @param serverId - Server identifier
     */
    stopHealthCheck(serverId: string): void;
    /**
     * Stop all health checks.
     */
    stopAll(): void;
    /**
     * Attempt to reconnect a server with exponential backoff.
     *
     * Backoff schedule: 1s, 2s, 4s (configurable max retries)
     *
     * On success: Updates status to 'connected', re-discovers tools
     * On failure: Updates status to 'error', stops health check
     *
     * @param registry - MCP server registry
     * @param serverId - Server identifier
     * @param maxRetries - Maximum reconnection attempts (default: 3)
     * @returns Promise resolving to true if reconnect succeeded, false otherwise
     */
    reconnectServer(registry: MCPServerRegistry, serverId: string, maxRetries?: number): Promise<boolean>;
    private reconnectServerInternal;
    private reconnectServerEffect;
}
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