/**
 * Request-span correlation system for MCP server instrumentation
 *
 * Handles mapping requestId to span data for correlation with handler execution.
 * Uses WeakMap to scope correlation maps per transport instance, preventing
 * request ID collisions between different MCP sessions.
 */
import type { Span } from '../../types-hoist/span';
import type { MCPTransport, RequestId } from './types';
/**
 * Stores span context for later correlation with handler execution
 * @param transport - MCP transport instance
 * @param requestId - Request identifier
 * @param span - Active span to correlate
 * @param method - MCP method name
 */
export declare function storeSpanForRequest(transport: MCPTransport, requestId: RequestId, span: Span, method: string): void;
/**
 * Completes span with tool results and cleans up correlation
 * @param transport - MCP transport instance
 * @param requestId - Request identifier
 * @param result - Tool execution result for attribute extraction
 */
export declare function completeSpanWithResults(transport: MCPTransport, requestId: RequestId, result: unknown): void;
/**
 * Cleans up pending spans for a specific transport (when that transport closes)
 * @param transport - MCP transport instance
 * @returns Number of pending spans that were cleaned up
 */
export declare function cleanupPendingSpansForTransport(transport: MCPTransport): number;
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