/**
 * Message Manager service for browser-use TypeScript
 *
 * Manages message history, sensitive data filtering, and state message creation
 * for the Agent system.
 */
import { BaseMessage, SystemMessage } from '../../llm/messages';
import { MessageManagerState, AgentOutput, ActionResult, AgentStepInfo } from '../views';
import { BrowserStateSummary } from '../../browser/views';
export type VisionDetailLevel = 'auto' | 'low' | 'high';
export type SensitiveData = Record<string, string | Record<string, string>>;
/**
 * Message Manager handles message history and state for the Agent
 */
export declare class MessageManager {
    task: string;
    state: MessageManagerState;
    systemPrompt: SystemMessage;
    fileSystem: any;
    sensitiveDataDescription: string;
    useThinking: boolean;
    maxHistoryItems: number | null;
    visionDetailLevel: VisionDetailLevel;
    includeToolCallExamples: boolean;
    includeRecentEvents: boolean;
    includeAttributes: string[];
    sensitiveData?: SensitiveData;
    lastInputMessages: BaseMessage[];
    constructor(options: {
        task: string;
        systemMessage: SystemMessage;
        fileSystem: any;
        state?: MessageManagerState;
        useThinking?: boolean;
        includeAttributes?: string[] | null;
        sensitiveData?: SensitiveData | null;
        maxHistoryItems?: number | null;
        visionDetailLevel?: VisionDetailLevel;
        includeToolCallExamples?: boolean;
        includeRecentEvents?: boolean;
    });
    /**
     * Build agent history description from list of items, respecting max_history_items limit
     */
    get agentHistoryDescription(): string;
    /**
     * Add a new task to the message manager
     */
    addNewTask(newTask: string): void;
    /**
     * Update the agent history description
     */
    private _updateAgentHistoryDescription;
    /**
     * Get sensitive data description for the current page
     */
    private _getSensitiveDataDescription;
    /**
     * Create state messages with all content
     */
    createStateMessages(options: {
        browserStateSummary: BrowserStateSummary;
        modelOutput?: AgentOutput | null;
        result?: ActionResult[] | null;
        stepInfo?: AgentStepInfo | null;
        useVision?: boolean;
        pageFilteredActions?: string | null;
        sensitiveData?: SensitiveData | null;
        availableFilePaths?: string[] | null;
    }): Promise<void>;
    /**
     * Get current message list
     */
    getMessages(): BaseMessage[];
    /**
     * Replace a specific state message slot with a new message
     */
    private _setMessageWithType;
    /**
     * Add a contextual message specific to this step
     */
    private _addContextMessage;
    /**
     * Filter out sensitive data from the message
     */
    private _filterSensitiveData;
}
/**
 * Helper functions for conversation saving
 */
/**
 * Save conversation history to file asynchronously
 */
export declare function saveConversation(inputMessages: BaseMessage[], response: any, target: string, encoding?: string): Promise<void>;
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