import type { Usage } from "@bastani/pi-ai/compat";
import type { AgentMessage } from "@earendil-works/pi-agent-core";
import { type SessionEntry } from "../session-manager.ts";
import type { BorrowedPlanner } from "./compaction-types.js";
import { type RangePlannerOptions } from "./range-planner.js";
import { type FileOperations } from "./utils.ts";
export interface PiSummarySettings {
    reserveTokens: number;
    keepRecentTokens?: number;
}
export interface PiSummaryPreparation {
    firstKeptEntryId: string;
    messagesToSummarize: AgentMessage[];
    turnPrefixMessages: AgentMessage[];
    previousSummary?: string;
    tokensBefore: number;
    keptTailTokens: number;
    fileOps: FileOperations;
    settings: PiSummarySettings;
}
export interface PiSummaryResult {
    summary: string;
    firstKeptEntryId: string;
    tokensBefore: number;
    tokensAfter: number;
    readFiles: string[];
    modifiedFiles: string[];
    usage: Usage;
}
export declare function preparePiSummaryCompaction(pathEntries: SessionEntry[], settings: PiSummarySettings, cwd?: string): PiSummaryPreparation | undefined;
export declare function runPiSummaryFallback(entries: SessionEntry[], settings: PiSummarySettings, planner: BorrowedPlanner, options: RangePlannerOptions & {
    signal?: AbortSignal;
    cwd?: string;
}): Promise<PiSummaryResult>;
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