import type { ConversationState } from "#client/conversation-state.js";
import type { EveAgentReducer, EveAgentReducerEvent } from "#client/reducer.js";
import type { MessageStreamEvent } from "#protocol/message.js";
/**
 * Transport facts about followed agent sessions. Only the canonical conversation receives them;
 * custom reducers see their results in `conversation.agents`.
 */
export type ClientAgentEvent = {
    readonly data: {
        readonly sessionId: string;
    };
    readonly type: "client.agent.following" | "client.agent.idle" | "client.agent.unavailable";
} | {
    readonly data: {
        readonly event: MessageStreamEvent;
        readonly sessionId: string;
    };
    readonly type: "client.agent.observed";
};
export type ConversationEvent = EveAgentReducerEvent | ClientAgentEvent;
export declare function initialConversationState(): ConversationState;
/** Pure reduction of accepted root and agent-session observations; followers own transport. */
export declare function reduceConversation(state: ConversationState, event: ConversationEvent): ConversationState;
/** The canonical conversation's reducer, which also folds in followed agent sessions. */
export declare const canonicalConversationReducer: {
    initial: typeof initialConversationState;
    reduce: typeof reduceConversation;
};
export declare const conversationReducer: EveAgentReducer<ConversationState>;