import { Part } from '../models/types';
import { ReadonlyContext } from '../agents/ReadonlyContext';
import { CallbackContext } from '../agents/CallbackContext';
import { LlmRequest } from '../models/LlmRequest';
import { BasePlanner } from './BasePlanner';
/**
 * Plan-Re-Act planner that constrains the LLM response to generate a plan before any action/observation.
 *
 * Note: this planner does not require the model to support built-in thinking
 * features or setting the thinking config.
 */
export declare class PlanReActPlanner extends BasePlanner {
    /**
     * @inheritdoc
     */
    buildPlanningInstruction(readonlyContext: ReadonlyContext, llmRequest: LlmRequest): string;
    /**
     * @inheritdoc
     */
    processPlanningResponse(callbackContext: CallbackContext, responseParts: Part[]): Part[] | undefined;
    /**
     * Splits the text by the last occurrence of the separator.
     *
     * @param text The text to split.
     * @param separator The separator to split on.
     * @returns A tuple containing the text before the last separator and the text after
     * the last separator.
     */
    private splitByLastPattern;
    /**
     * Handles non-function-call parts of the response.
     *
     * @param responsePart The response part to handle.
     * @param preservedParts The mutable list of parts to store the processed parts in.
     */
    private handleNonFunctionCallParts;
    /**
     * Marks the response part as thought.
     *
     * @param responsePart The mutable response part to mark as thought.
     */
    private markAsThought;
    /**
     * Builds the NL planner instruction for the Plan-Re-Act planner.
     *
     * @returns NL planner system instruction.
     */
    private buildNlPlannerInstruction;
}