import type { AgentMessage, ApplyCompressionOptions, ApplyCompressionResult, CompressionMapping, CompressionPayload, OpenAIMessage } from "./types.js";
type AnyMessage = AgentMessage & {
    role?: string;
    content?: unknown;
    timestamp?: number;
};
export declare function buildCompressionPayload(messages: AgentMessage[], minMessageChars: number): CompressionPayload;
export declare function applyCompressionResult(originalMessages: AgentMessage[], mappings: CompressionMapping[], compressedMessages: OpenAIMessage[], _options: ApplyCompressionOptions): ApplyCompressionResult;
export declare function convertMessage(message: AnyMessage): OpenAIMessage | undefined;
export declare function extractOpenAIText(message: OpenAIMessage): string;
export declare function injectCompressionAwareness(messages: AgentMessage[]): AgentMessage[];
export {};