import type { ChangeDetails } from '../../../contracts/components.js';
/** Kinds recognised by the overlay layer stack + material thickness table. */
export type OverlayKind = 'dialog' | 'alert-dialog' | 'sheet' | 'popover' | 'menu' | 'tooltip' | 'toast' | 'select' | 'combobox';
/** The five reasons callers see (contract §10.1); anything else collapses to 'imperative'. */
export type OverlayOpenReason = 'trigger-press' | 'outside-press' | 'escape-key' | 'close-press' | 'imperative';
export interface OverlayOpenChangeDetails extends ChangeDetails {
    reason: OverlayOpenReason;
}
/** Normalises a Base UI change-details reason into the contract's five-value union. */
export declare function toOverlayReason(reason: unknown): OverlayOpenReason;
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