import type { MiniAgentEvent } from '../subagent/agent-events.js';
import { type CompactHookRegistry } from './compact-hooks.js';
import type { Message } from '../session/session-jsonl.js';
import type { AgentLoopLlmUsage } from './agent-loop-types.js';
export interface AgentLoopPrepareCompaction {
    (params: {
        messages: Message[];
        sessionKey: string;
        runId: string;
        forceCompaction?: boolean;
        includeThinking?: boolean;
        abortSignal?: AbortSignal;
    }): Promise<{
        summary?: string;
        summaryMessage?: Message;
        messages?: Message[];
        droppedMessages?: number;
        checkpointOutline?: string[];
        usage?: AgentLoopLlmUsage[];
    }>;
}
export interface AgentLoopCompactionOutcome {
    attempted: boolean;
    succeeded: boolean;
    retrySameTurn: boolean;
    compactionSummary?: Message;
}
export declare function runProactiveWindowCompaction(params: {
    sessionKey: string;
    runId: string;
    currentMessages: Message[];
    rawTotalChars: number;
    promptUnitsForWindow: number;
    prepareCompaction: AgentLoopPrepareCompaction;
    compactHooks?: CompactHookRegistry;
    persistCurrentMessages: (messages?: Message[]) => Promise<void>;
    push: (event: MiniAgentEvent) => void;
    onWarn?: (message: string, meta: Record<string, unknown>) => void;
    abortSignal?: AbortSignal;
    includeThinking?: boolean;
}): Promise<AgentLoopCompactionOutcome>;
export declare function runPromptPruneCompaction(params: {
    sessionKey: string;
    runId: string;
    currentMessages: Message[];
    droppedMessagesForStats: Message[];
    prepareCompaction: AgentLoopPrepareCompaction;
    compactHooks?: CompactHookRegistry;
    persistCurrentMessages: (messages?: Message[]) => Promise<void>;
    push: (event: MiniAgentEvent) => void;
    onWarn?: (message: string, meta: Record<string, unknown>) => void;
    abortSignal?: AbortSignal;
    includeThinking?: boolean;
}): Promise<AgentLoopCompactionOutcome>;
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