import type { SessionEntry } from "../../session-manager-types.ts";
import type { SessionRecordHeader, SessionSnapshot, SessionSummary } from "./types.js";
/** Metadata stays bounded by the first message and latest metadata, not the transcript. */
export interface SessionSummaryState {
    readonly messageCount: number;
    readonly firstMessage: string;
    readonly name?: string;
    readonly hasName: boolean;
    readonly summary?: string;
    readonly summarizedThroughId?: string;
    readonly latestMessageTime: number | null;
}
export interface SessionSummaryText {
    readonly index: number;
    readonly text: string;
}
/** Applies only this batch; texts contain only contributions from these entries. */
export declare function applySessionSummaryEntries(previous: SessionSummaryState | undefined, entries: readonly SessionEntry[]): {
    state: SessionSummaryState;
    texts: readonly SessionSummaryText[];
};
export declare function materializeSessionSummaryMetadata(header: SessionRecordHeader, state: SessionSummaryState): Omit<SessionSummary, "searchText">;
export declare function summarizeSession({ header, entries }: SessionSnapshot): SessionSummary;
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