/**
 * PII Redaction Engine
 *
 * Detects and redacts personally identifiable information (PII) from content
 * to prevent leakage of sensitive data to the LLM.
 *
 * Redacts: emails, phone numbers, SSNs, credit cards, IP addresses
 * Supports allowlisting of trusted institutional phone numbers (e.g., Poison Control)
 */
import { type PIIAllowlistConfig } from './pii-allowlist.js';
export interface PIIRedactionResult {
    content: string;
    pii_types_redacted: string[];
    pii_allowlisted: Array<{
        type: string;
        value: string;
        reason: string;
    }>;
    content_modified: boolean;
    metadata: {
        redaction_counts: Record<string, number>;
        allowlist_counts: Record<string, number>;
    };
}
/**
 * Redact PII from content
 *
 * @param content Content to redact PII from
 * @param sourceUrl Optional source URL for domain-scoped allowlisting
 * @param allowlistConfig Optional custom allowlist config
 */
export declare function redactPII(content: string, sourceUrl?: string, allowlistConfig?: PIIAllowlistConfig): PIIRedactionResult;
/**
 * Check if content contains any PII (without redacting)
 */
export declare function containsPII(content: string): boolean;
/**
 * Get list of PII types detected (without redacting)
 */
export declare function detectPIITypes(content: string): string[];
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