declare const DELIMITER_CANDIDATES: readonly ["_", "-", " ", "."];
export type Delimiter = (typeof DELIMITER_CANDIDATES)[number];
/** Pick the delimiter whose split produces the most consistent field count across `lines`. */
export declare function pickPrimaryDelimiter(lines: string[]): Delimiter;
/** Split a single sample name on `delimiter`. Empty input returns `['']` so callers
 *  always receive at least one token. */
export declare function splitMulti(name: string, delimiter: Delimiter): string[];
/** The `exp<NNN>_<date>_<operator>` fields at the start of a sample name. */
export interface ExperimentHeader {
    code?: string;
    /** ISO date. Names carry it as YYMMDD, YYYYMMDD or DDMMYYYY. */
    date?: string;
    operator?: string;
}
export interface TokenizedBatch {
    delimiter: Delimiter;
    /** One row of tokens for each input name, in input order. */
    rows: string[][];
    /** Header fields with one value in the batch. They are not in `rows`. */
    experiment: ExperimentHeader;
    /**
     * Number of leading tokens that all rows share (normally the experiment
     * title). They cannot tell a QC sample from a study sample.
     */
    sharedPrefix: number;
}
/** Read a 6- or 8-digit date token; year-first is tried before day-first. */
export declare function parseDateToken(token: string): string | undefined;
/**
 * Sample names → token rows.
 *
 *   1. Trim; drop a file extension that all names share.
 *   2. Split on runs of the primary delimiter.
 *   3. Drop a trailing 14-digit acquisition stamp.
 *   4. Read the experiment header. A field moves to `experiment` when the batch
 *      has one value for it. Any other field stays in the rows as written, so
 *      `QC` or `WT` after the date in some names is not taken for operator
 *      initials.
 *   5. Count the tokens that all names share after the header (the experiment
 *      title), so a title word such as `std` cannot classify the batch as QC.
 */
export declare function tokenizeBatch(names: string[]): TokenizedBatch;
export {};