/**
 * @license
 * Copyright 2025 Vybestack LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { type IContent } from '../../services/history/IContent.js';
/**
 * Interface for cancelled tool information
 */
export interface CancelledToolInfo {
    toolCallId: string;
    toolName?: string;
    timestamp?: string;
}
export declare class SyntheticToolResponseHandler {
    /**
     * Creates synthetic tool responses for cancelled tools
     * @param cancelledTools Array of cancelled tool information
     * @returns Array of synthetic tool response messages
     */
    static createSyntheticResponses(cancelledTools: CancelledToolInfo[]): IContent[];
    /**
     * Identifies tool calls that need synthetic responses by comparing
     * assistant messages with tool_calls against existing tool responses
     * @param messages The conversation history
     * @returns Array of tool call IDs that need synthetic responses
     */
    static identifyMissingToolResponses(messages: IContent[]): string[];
    /**
     * Patches a message history to include synthetic responses for any
     * tool calls that don't have corresponding tool responses
     * @param messages The original message history
     * @returns Patched message history with synthetic responses added
     */
    static patchMessageHistory(messages: IContent[]): IContent[];
    /**
     * Adds a user-facing cancellation notice to the message history
     * @param messages The message history
     * @param cancelledCount Number of tools that were cancelled
     * @returns Message history with cancellation notice added
     */
    static addCancellationNotice(messages: IContent[], cancelledCount: number): IContent[];
}