/**
 * Agent Service
 * SSE-based streaming agent service for communicating with Paean AI cloud
 */
import type { CliModeOptions } from './cli-mode.js';
import type { AgentStreamCallbacks, McpState, McpToolResult } from './types.js';
/**
 * Extract a human-readable error message from an unknown value.
 * Handles: string, Error, { error: string | { message } }, { message }, plain objects.
 */
export declare function extractErrorMessage(value: unknown): string;
/** CLI model tier: Paean Lite / Flash / Pro */
export type CliModelTier = 'lite' | 'flash' | 'pro';
/**
 * Stream options for agent messages
 */
export interface StreamOptions {
    conversationId?: string;
    mcpState?: McpState;
    cliMode?: Partial<CliModeOptions>;
    references?: Array<{
        type: string;
        id: string;
        content?: string;
    }>;
    modelTier?: CliModelTier;
}
/**
 * Agent Service class for streaming communication
 */
export declare class AgentService {
    private abortController;
    /**
     * Stream a message to the agent and handle SSE events
     */
    streamMessage(message: string, callbacks: AgentStreamCallbacks, options?: StreamOptions): Promise<{
        abort: () => void;
    }>;
    /**
     * Process SSE stream
     */
    private processStream;
    /**
     * Handle individual SSE events
     */
    private handleEvent;
    /**
     * Submit MCP tool result back to the API
     */
    submitMcpResult(conversationId: string, callId: string, result: McpToolResult): Promise<boolean>;
    /**
     * Abort the current stream
     */
    abort(): void;
}
export declare const agentService: AgentService;
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