import type { AgentHistoryRecord } from "@/types";
type AgentHistoryRecordType = AgentHistoryRecord["type"];
type AgentHistorySummaryCounts = Record<AgentHistoryRecordType, number>;
type AgentHistorySummary = {
    recordCount: number;
    firstAt: number | null;
    lastAt: number | null;
    counts: AgentHistorySummaryCounts;
    lastUserMessage: string | null;
    lastAssistantMessage: string | null;
    lastNote: string | null;
    lastToolName: string | null;
};
/**
 * Builds compact summary metadata from agent history records.
 * Expects: records are in chronological order from oldest to newest.
 */
export declare function agentHistorySummary(records: AgentHistoryRecord[]): AgentHistorySummary;
export {};
//# sourceMappingURL=agentHistorySummary.d.ts.map