import type { PartialToolCall } from '../../../../providers/interface.js';
import type { ConversationDomainState } from '../../domains/conversation.js';
export declare const TERMINAL_LIFECYCLE_STATES: readonly ["completed", "failed", "cancelled"];
export declare function isTerminalLifecycleState(s: string): boolean;
export declare function computeActiveIds<T extends {
    id: string;
    status: string;
}>(map: Map<string, T>): string[];
export declare function uniq<T>(items: T[]): T[];
export declare function now(): number;
export declare function updateDomainMetadata<T extends {
    revision: number;
    lastUpdatedAt: number;
    source: string;
}>(domain: T, source: string): T;
export declare function isTerminalTurnState(state: ConversationDomainState['turnState']): boolean;
export declare function canStartNewTurn(domain: ConversationDomainState): boolean;
export declare function isCurrentTurnEvent(domain: ConversationDomainState, turnId: string): boolean;
/**
 * formatPartialToolPreview - The name of the tool call now in flight, or
 * undefined when no tool call has been named yet.
 *
 * This value is a STATUS label: surfaces render it in an ambient "what is
 * happening right now" region (the agent's activity sidebar, the thinking
 * fragment). It is recomputed on every STREAM_DELTA, so it must depend only on
 * facts that are stable across the deltas of a single tool call.
 *
 * A tool call's `arguments` string is NOT such a fact, it arrives a few
 * characters at a time as the provider streams the call's JSON. Including it
 * here made the status region redraw a longer fragment on every delta, which
 * reads as the label flashing through the model's output character by
 * character until the turn ends. Streamed characters belong to the transcript;
 * the status region gets the stable phrase. The tool NAME is delivered whole
 * before its arguments begin, so it holds still for the life of the call, and
 * it is the useful part: it says which tool is running.
 */
export declare function formatPartialToolPreview(toolCalls?: PartialToolCall[]): string | undefined;
export declare function resetStreamState(): ConversationDomainState['stream'];
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