import { ReActState, ReActStep, ActionStep } from './types';
import { LLMMessage } from '../model';
/**
 * Implementation of ReAct state management
 */
export declare class ReActStateManager implements ReActState {
    private task;
    private steps;
    setTask(text: string): void;
    getTask(): string;
    clear(): void;
    addThought(text: string): void;
    addAction(action: ActionStep): void;
    addObservation(text: string): void;
    addReflexion(text: string): void;
    getSteps(): ReActStep[];
    /**
     * Get the last argument value used for a specific key in any tool call.
     */
    getLastArgValue(argKey: string): unknown;
    /**
     * Convert state to LLM messages format
     */
    toMessages(systemPrompt: string): LLMMessage[];
}