import type { ToolPresenter } from '../../registry/tool/presentation.js';
import type { AcpSessionUpdate, AcpStopReason } from '../../types/acp/index.js';
import type { SessionEvent } from '../../types/session/events.js';
import type { StopReason } from '../../types/session/stop-reason.js';
export declare function toAcpStopReason(reason: StopReason | string | undefined): AcpStopReason;
/**
 * One session event as a session update, or `null`.
 *
 * Takes the presenter rather than reaching for a registry, so this stays
 * pure and so a caller with a narrowed registry gets that narrowing.
 */
export declare function toAcpSessionUpdate(event: SessionEvent, presenter: ToolPresenter): AcpSessionUpdate | null;
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