/**
 * A header as text.
 *
 * Layer 7, and pure. `formatDiagnostics` already turns problems into something a human reads;
 * this does the same for the header itself — the thing that goes into a bug report, a CLI, or a
 * log line when a file behaves oddly.
 *
 * Two rules keep it useful rather than decorative. It never invents a value: a field edfcore
 * could not resolve prints as `unknown` rather than as a plausible default, because the whole
 * point of pasting this somewhere is that the reader can trust it. And it prints no patient
 * identification unless asked — a header carries a name and a birth date, and a summary that
 * lands in a chat log or an issue tracker should not carry them by default.
 */
import type { EdfHeader, FormatHeaderOptions } from './types.js';
/**
 * A multi-line summary of a header.
 *
 * Patient identification is omitted unless `includePatientId` is set. That is not a privacy
 * feature — the data is still in `header.patient` for anyone who wants it — it is a default
 * chosen so that the obvious thing to do with this string is also the safe one.
 */
export declare function formatHeader(header: EdfHeader, options?: FormatHeaderOptions): string;
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