import { UnitEntryForm } from './unit-entry-form.js';
/**
 * THE shape rule for one marker object, as problem sentences WITHOUT a
 * location prefix (the caller adds `<listPath>[i]: `). Empty means well formed.
 * `normalizeUnitList`, `normalizeUnitMap` and `normalizeUnitScalar` all call
 * it, so no list re-implements what a marker is.
 *
 * - The unit key (`pattern`, or `weight` in a boost map) must be present:
 *   `pattern` a non-empty string, `weight` a number. A marker with none is "a
 *   marker naming no unit"; a synonym key (`glob`, `path`, …) is named as the
 *   mistake it is — the unit is `pattern` on every list.
 * - `expectEmpty` must be the literal `true`; otherwise write the plain value.
 * - `reason`, when present, must be a non-empty string.
 * - Any other key is refused, with a did-you-mean through the ONE scorer
 *   (`nearestIds`, `@shrkcrft/core`).
 */
export declare function markerEntryProblems(entry: Readonly<Record<string, unknown>>, form: UnitEntryForm): readonly string[];
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