import type { ProviderCompactResult } from '../../provider.js';
import type { TraceSink } from '../../trace/index.js';
import type { CompactionTrigger } from '../../trace/types.js';
import { readShrinkFraction, type CompactionOps, type MicrocompactOps, type MicrocompactOptions, type MicrocompactResult } from '../shared/compaction.js';
export { readShrinkFraction };
import type { OpenAIMessage } from './messages.js';
export declare function isFreshUserTurn(msg: OpenAIMessage): boolean;
export declare const openaiMicrocompactOps: MicrocompactOps<OpenAIMessage>;
export declare function microcompactToolResults(messages: ReadonlyArray<OpenAIMessage>, opts?: MicrocompactOptions): MicrocompactResult;
export declare const openaiCompactionOps: CompactionOps<OpenAIMessage>;
export interface CompactOpenAIHistoryDeps {
    priorTurns: OpenAIMessage[];
    summarize: (transcript: string, signal: AbortSignal) => Promise<string>;
    isClosed: boolean;
    isIdle: boolean;
    beginAbort: () => AbortController;
    clearAbort: (controller: AbortController) => void;
    trigger?: CompactionTrigger;
    traceWriter?: TraceSink;
    usedFraction?: number;
    shrinkAtFraction?: number;
}
export declare function compactOpenAIHistory(deps: CompactOpenAIHistoryDeps): Promise<ProviderCompactResult>;