/**
 * Lightweight LLM provider using OpenAI-compatible chat completions API.
 *
 * Configuration priority:
 *   1. Environment variables: OPENAI_API_KEY + OPENAI_BASE_URL
 *   2. Explicit config passed to constructor
 *
 * Uses Node 22 native fetch — no external dependencies.
 */
export interface LLMProviderConfig {
    apiKey?: string;
    baseUrl?: string;
    model?: string;
}
export interface ChatMessage {
    role: 'system' | 'user' | 'assistant';
    content: string;
}
export declare class LLMProvider {
    private apiKey;
    private baseUrl;
    private model;
    constructor(config?: LLMProviderConfig);
    /**
     * Send a chat completion request and return the assistant's text response.
     */
    chat(messages: ChatMessage[]): Promise<string>;
}
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