import { Ctx } from '@milkdown/kit/ctx';
/** Toolbar item shape expected by Crepe formatting group (icon, active, onRun). */
export type FormattingToolbarItem = {
    icon: string;
    active: (ctx: Ctx) => boolean;
    onRun: (ctx: Ctx) => void;
};
/**
 * Add heading (H1–H6) and list (bullet, ordered) toolbar items to the formatting group.
 * Call from Crepe Toolbar buildToolbar with the result of builder.getGroup('formatting').
 *
 * **Toolbar CSS coupling:** `theme/overrides.css` hides buttons 5–12 when the selection is in a
 * table cell (`data-bf-formatting-toolbar-table-cell` on `body`). That assumes Crepe prepends
 * bold, italic, strikethrough (3), then this function adds highlight, H1–H6, bullet, ordered (9).
 * Change order here only if you update the nth-child range in overrides.css.
 */
export declare function addFormattingToolbarItems(formattingGroup: {
    addItem: (key: string, item: FormattingToolbarItem) => unknown;
}): void;