import type { MessageParam } from '@anthropic-ai/sdk/resources';
import type { AnthropicMessagesCreateParams } from './types.js';
import { COMPACT_ACK_TEXT, COMPACT_SUMMARY_HEADER, COMPACT_SYSTEM_PROMPT, type CompactionOps, type MicrocompactOps, type MicrocompactOptions, type MicrocompactResult } from '../shared/compaction.js';
export { COMPACT_ACK_TEXT, COMPACT_SUMMARY_HEADER, COMPACT_SYSTEM_PROMPT };
export declare function isFreshUserTurn(msg: MessageParam): boolean;
export declare const anthropicCompactionOps: CompactionOps<MessageParam>;
export declare const anthropicMicrocompactOps: MicrocompactOps<MessageParam>;
export declare function microcompactToolResults(messages: ReadonlyArray<MessageParam>, opts?: MicrocompactOptions): MicrocompactResult;
export declare function findCompactionBoundary(messages: ReadonlyArray<MessageParam>, keepLastN: number): number;
export declare function findCompactionBoundaryAdaptive(messages: ReadonlyArray<MessageParam>, keepLastN: number, usedFraction: number, shrinkAtFraction: number): number;
export declare function buildSummarizationRequest(olderMessages: ReadonlyArray<MessageParam>, model: string, maxTokens: number): AnthropicMessagesCreateParams;
export declare function applyCompaction(messages: ReadonlyArray<MessageParam>, boundary: number, summaryText: string): MessageParam[];
export declare function estimateTokensSaved(before: ReadonlyArray<MessageParam>, boundary: number, summaryText: string): number;