import type { McpServer } from '@modelcontextprotocol/server';
/**
 * Manages MCP resource subscriptions globally for the server.
 * Tracks which transport sessions are subscribed to which resource URIs,
 * and maintains references to the McpServer instances to broadcast notifications.
 */
export declare class SubscriptionManager {
    private static readonly MAX_TRACKED_SESSIONS;
    private static readonly MAX_SUBSCRIPTIONS_PER_SESSION;
    private servers;
    private subscriptions;
    /**
     * Register a server instance for a session to allow sending notifications.
     */
    registerServer(sessionId: string, server: McpServer): void;
    /**
     * Unregister a server instance and clean up its subscriptions.
     */
    unregisterServer(sessionId: string): void;
    /**
     * Subscribe a session to a resource URI.
     */
    subscribe(uri: string, sessionId?: string): void;
    /**
     * Unsubscribe a session from a resource URI.
     */
    unsubscribe(uri: string, sessionId?: string): void;
    /**
     * Unsubscribe a session from all resources (useful on transport disconnect).
     */
    unsubscribeSession(sessionId: string): void;
    /**
     * Notifies all subscribed clients that a resource has changed.
     */
    notifyResourceUpdated(uri: string): Promise<void>;
    /**
     * Broadcasts a generic notification to all connected clients.
     */
    broadcastNotification(method: string): Promise<void>;
    /**
     * Check if there are any active subscribers for a specific URI.
     */
    hasSubscribers(uri: string): boolean;
}
export declare const globalSubscriptionManager: SubscriptionManager;
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