/**
 * SSE Stream Management Utilities for MCP Gateway.
 * Handles cleanup and management of Server-Sent Events streams.
 */
/**
 * Helper to clean up stale SSE streams before handling new requests.
 * This preserves sessionId and only cleans up SDK-internal stream state.
 *
 * @param transport - The StreamableHTTPServerTransport instance from MCP SDK
 * @param sessionId - The current session ID for logging purposes
 */
export declare function cleanupStaleSseStreams(transport: unknown, sessionId: string): void;
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