/**
 * PII Redactor — fine-grained inline replacement of PII patterns in text.
 *
 * Phase 4 of the snapshot feature. Phase 1 redacts whole text nodes only;
 * this module replaces matches *inline*, preserving surrounding prose:
 *   "Contact us at foo@bar.com for help" → "Contact us at [REDACTED] for help"
 *
 * Two entry points:
 *   - `redactString(text)` — pure string-in/string-out, used in tests and
 *     callable independently if a non-DOM caller ever needs it.
 *   - `redactTextNodes(root)` — walks every text node under `root` and
 *     replaces PII inline, skipping subtrees marked with `data-no-redact`,
 *     and skipping `<code>` / `<pre>` (legitimate examples).
 *
 * Design notes:
 *   - Patterns are tuned to avoid common false positives. SSN requires
 *     dashes/spaces (so 9-digit order numbers survive); credit cards must
 *     pass a Luhn check (so 16-digit tracking IDs survive); IPs reject any
 *     octet > 255 (so version strings like 1.2.3.999 survive).
 *   - We bias toward under-redaction in ambiguous cases — better to leak
 *     a tracking number than corrupt a customer's real prose.
 */
/**
 * Replace every PII match in `text` with `[REDACTED]`. Surrounding prose
 * is preserved.
 *
 * Order matters: URLs first (so `http://...` doesn't get mangled by IPv4
 * matching), then emails, then more specific numeric patterns.
 */
export declare function redactString(text: string): string;
/**
 * Walks every text node under `root` and redacts PII inline. Skips:
 *   - text nodes inside any ancestor with `[data-no-redact]`
 *   - text nodes inside `<code>`, `<pre>`, `<style>`, `<textarea>`
 *
 * Mutates the DOM in place.
 */
export declare function redactTextNodes(root: Element): void;
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