import type { AgentMessage } from '@earendil-works/pi-agent-core';
import type { TranscriptSourceEntry } from '../../storage/sqlite/transcript-repository.js';
export interface CompactionSourcePlan {
    sourceEntries: TranscriptSourceEntry[];
    keptEntries: TranscriptSourceEntry[];
    keptMessages: AgentMessage[];
    allMessages: AgentMessage[];
    sourceThroughSeq: number;
}
export declare function planCompactionSource(params: {
    entries: readonly TranscriptSourceEntry[];
    minMessagesBeforeCompact: number;
    recentTurnsPreserve: number;
    keepRecentTokens: number;
    force: boolean;
}): CompactionSourcePlan | null;
export declare function estimateCompactionSourceTokens(plan: CompactionSourcePlan): {
    before: number;
    kept: number;
};