import type { Event, McpEvent } from '../types';
export declare const MAX_DEPTH = 10;
export declare const MAX_BREADTH = 100;
export declare const MAX_STRING_LENGTH = 32768;
export declare const MAX_EVENT_BYTES = 102400;
/**
 * Recursively normalizes a value, handling:
 * - String truncation (> MAX_STRING_LENGTH)
 * - Non-serializable values (functions, symbols, undefined, BigInt, NaN, Infinity)
 * - Date objects -> ISO string
 * - Circular reference detection
 * - Depth limiting
 * - Breadth limiting
 */
export declare function normalize(input: unknown, depth?: number, maxBreadth?: number, maxStringLength?: number): unknown;
/**
 * Applies layered truncation to an event:
 * 1. Field-level string limits (userIntent, resourceName, metadata fields, error.message)
 * 2. Error frame limiting (first 25 + last 25 if > 50)
 * 3. Response content text limits (32KB per text block)
 * 4. Recursive normalization on user-controlled fields
 * 5. Size-targeted truncation (progressive depth reduction + last-resort string truncation)
 */
export declare function truncateEvent<T extends Event | McpEvent>(event: T): T;
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