/**
 * PromptBuilder class for constructing system and user messages
 * Loads templates and builds context-aware prompts for the LLM
 */
import { LLMMessage, ScreenState, AgentOutput, ActionResult, HistoryItem } from '../types';
import { FileSystem } from './FileSystem';
export interface PromptBuilderConfig {
    maxHistoryItems?: number;
    includeFileContent?: boolean;
}
export declare class PromptBuilder {
    private fileSystem;
    private config;
    constructor(fileSystem?: FileSystem | null, config?: PromptBuilderConfig);
    /**
     * Build system message with prompt template
     */
    buildSystemMessage(): LLMMessage;
    /**
     * Build user message with task, screen state, and history
     */
    buildUserMessage(task: string, screenState: ScreenState, stepInfo: {
        stepNumber: number;
        maxSteps: number;
    }, lastOutput: AgentOutput | null, lastResult: ActionResult[] | null, history: HistoryItem[], readStateDescription: string): Promise<LLMMessage>;
    /**
     * Build a context message (for errors, corrections, etc.)
     */
    buildContextMessage(message: string): LLMMessage;
    /**
     * Format action results into readable text
     */
    private formatActionResults;
    /**
     * Format history items into readable text
     */
    private formatHistory;
    /**
     * Truncate history to fit within max items
     */
    private truncateHistory;
    /**
     * Get file system content for context
     */
    private getFileSystemContent;
}
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