interface UserPII {
    id: string;
    email?: string | null;
    phone?: string | null;
}
interface VendorPII {
    id: string;
    ownerEmail?: string | null;
    ownerPhone?: string | null;
}
interface RedactionMap {
    /** Raw PII string → "{user_a}" pseudo-id */
    forward: Map<string, string>;
    /** "{user_a}" → raw PII string (for substituting back into AI output) */
    reverse: Map<string, string>;
}
declare function buildRedactionMap(users: Map<string, UserPII>, vendors: Map<string, VendorPII>): RedactionMap;
declare function redactForPrompt(text: string, map: RedactionMap): string;
declare function substitutePseudoIds(text: string, map: RedactionMap): string;

export { type RedactionMap, type UserPII, type VendorPII, buildRedactionMap, redactForPrompt, substitutePseudoIds };