/**
 * JSON Forms–compatible UI Schema label resolution.
 * @see https://jsonforms.io/docs/i18n
 *
 * Keys: `{i18n}.label` (Control/Group/Category/Step), `{i18n}.text` (Label),
 * or `{i18n}.description` (Control field description).
 */
export type UiI18nSuffix = "label" | "text" | "description";
/** UI editor path segment (child index or `options.detail`). */
export type UiI18nPathSegment = number | "detail";
export declare function uiI18nMessageKey(i18nPrefix: string, suffix: UiI18nSuffix): string;
/**
 * Slugify a schema root title for use as the leading i18n prefix segment.
 * Empty / unusable titles fall back to `schema`.
 */
export declare function slugifySchemaTitle(title: string | undefined): string;
/**
 * Derive a unique JSON Forms `i18n` prefix:
 * `{rootSlug}.{dataPath}` for Controls with scope, else `{rootSlug}.ui.{uiPath}`.
 */
export declare function deriveUiI18nPrefix(rootSlug: string, element: {
    elementKind: string;
    scope?: string;
}, uiPath: readonly UiI18nPathSegment[]): string;
/**
 * Resolve a UI label/text using an external message lookup (e.g. messages[locale][key]).
 * Returns `undefined` when neither a translation nor a default message is available.
 */
export declare function resolveUiI18nString(options: {
    i18n?: string;
    defaultMessage?: string;
    suffix: UiI18nSuffix;
}, lookup: (key: string) => string | undefined): string | undefined;
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