/**
 * Values drawn from a `<gen type="file">`.
 *
 * Two modes. Plain: pick uniformly from the file's lines (or a CSV column).
 * Row-linked (`row="K"`): every field sharing the key resolves the SAME CSV row
 * for a given card, so a name, an email and a city taken from one file stay
 * coherent instead of being three unrelated rows. That shared choice lives in
 * `ctx.fileRowLinks` — built once by whichever field asks first, then reused
 * and cross-checked by the rest.
 *
 * Extracted from build.ts so that file stays focused; depends on nothing in it.
 */
import type { SequenceBuildContext } from './context.js';
import type { GenSpec } from './types.js';
/**
 * Identifies the exact CSV reading a row link was built against. Two fields
 * claiming the same `row="K"` must agree on all of it — otherwise "the same
 * row" would silently mean different rows in different files.
 */
export declare function linkedFileSourceKey(src: string, delimiter: string, skipHeader: boolean): string;
export declare function buildFileValues(gen: GenSpec, count: number, prng: () => number, ctx: SequenceBuildContext): string[];
/** `sample="exact"`: cover the distribution evenly rather than draw from it. */
export declare function exactSample(gen: GenSpec): boolean;
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