import type { AppErrorImpl } from '../result/errors.js';
import { type Result } from '../result/result.js';
import type { IUnitScalar } from './i-unit-scalar.js';
/**
 * THE parser for a markable SCALAR selector (registration hint
 * `discovery.targetFile`): `string | { pattern, expectEmpty: true, reason? }`
 * in, the plain unit plus its ledger (0 or 1 mark) out.
 *
 *   normalizeUnitScalar({ pattern: 'src/app/routes.ts', expectEmpty: true }, 'discovery.targetFile')
 *   → ok({ unit: 'src/app/routes.ts', marks: [{ list: 'discovery.targetFile', unit: 'src/app/routes.ts' }] })
 *
 * Refusals are `<listPath>: …` problems (no index), with the same marker rules
 * as a list entry. Idempotent: a string returns `{ unit, marks: [] }`. Only
 * call it when the scalar is present — absence is the asset validator's call.
 */
export declare function normalizeUnitScalar(value: unknown, listPath: string): Result<IUnitScalar, AppErrorImpl>;
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