/**
 * LLM-based knowledge extractor using OpenAI-compatible chat completions API.
 *
 * Implements the LLMProvider interface so it can be plugged directly into
 * DocumentExtractor as the `llmProvider` option.
 *
 * Configuration via environment variables:
 *   OPENAI_API_KEY   — required
 *   OPENAI_BASE_URL  — optional, defaults to https://api.openai.com/v1
 *   OPENAI_MODEL     — optional, defaults to gpt-4o-mini
 */
import type { LLMProvider } from '../adapter/llm-provider.js';
export interface OpenAILLMProviderOptions {
    apiKey?: string;
    baseUrl?: string;
    model?: string;
    /** Request timeout in milliseconds (default 60_000) */
    timeoutMs?: number;
}
export declare class OpenAILLMProvider implements LLMProvider {
    private apiKey;
    private baseUrl;
    private model;
    private timeoutMs;
    constructor(options?: OpenAILLMProviderOptions);
    /** Check whether an API key is available. */
    static isAvailable(): boolean;
    complete(prompt: string): Promise<string>;
}
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