/**
 * Message structure for LLM communication
 */
export interface LLMMessage {
    role: 'system' | 'user' | 'assistant';
    content: string;
}
/**
 * Configuration for model requests
 */
export interface ModelConfig {
    model: string;
    apiKey: string;
    maxRetries?: number;
    timeout?: number;
}
/**
 * Response from LLM model
 */
export interface ModelResponse {
    content: string;
    usage?: {
        promptTokens?: number;
        completionTokens?: number;
        totalTokens?: number;
    };
}
/**
 * Abstract interface for LLM model providers
 */
export interface ModelProvider {
    /**
     * Send messages to the model and get a response
     */
    chat(messages: LLMMessage[], config: ModelConfig, abortSignal?: AbortSignal): Promise<ModelResponse>;
    /**
     * Get the provider name
     */
    getName(): string;
}
/**
 * Model error types
 */
export declare class ModelError extends Error {
    readonly statusCode?: number | undefined;
    constructor(message: string, statusCode?: number | undefined);
}
export declare class ModelTimeoutError extends ModelError {
    constructor(message?: string);
}
export declare class ModelAbortError extends ModelError {
    constructor(message?: string);
}