/**
 * Security utilities for preventing SQL injection and other attacks
 */
/**
 * Sanitize input to prevent prototype pollution
 */
export declare function sanitizeInput(input: unknown, visited?: WeakSet<object>): unknown;
/**
 * Escape SQL identifier (column/table name) to prevent injection
 * Uses PostgreSQL quoting style with double quotes
 */
export declare function escapeIdentifier(name: string): string;
/**
 * Escape JSONB path for safe use in queries
 */
export declare function escapeJsonPath(path: string): string;
/**
 * Validate that a value is safe for use in a parameter
 * Throws if value contains potentially dangerous content
 */
export declare function validateParameterValue(value: unknown): void;
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