import type { PiiMatch, RedactionConfig } from "./types.js";
/**
 * Redact PII matches from text.
 *
 * Modes:
 * - "mask": Replace middle characters with mask char (e.g., "jo**@example.com")
 * - "remove": Remove the PII entirely
 * - "placeholder": Replace with type label (e.g., "[EMAIL]")
 *
 * Overlapping matches are merged into maximal intervals before substitution.
 * Detection routinely produces overlaps — e.g. `us_bank_number` (`\d{8,17}`)
 * spans the same digit run as `npi` / `us_drivers_license`. Substituting them
 * independently (the old descending-start loop) let an inner match's
 * replacement shift the text so an outer match's now-stale `end` sliced the
 * wrong point, leaving trailing PII digits behind in placeholder/remove modes
 * (H4). Merging first guarantees the spans handed to substitution are
 * disjoint, so no substitution can invalidate another's offsets.
 */
export declare function redactPii(text: string, matches: PiiMatch[], config?: RedactionConfig): string;
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