/**
 * Perplexity Provider Implementation
 *
 * Perplexity uses an OpenAI-compatible API format.
 * This provider extends OpenAIProvider with the correct name identifier.
 *
 * NOTE: Perplexity does NOT have a /models endpoint, so health check uses chat completion.
 */
import { OpenAIProvider } from './openai.js';
import type { ProviderConfig } from './types.js';
/**
 * Perplexity API provider adapter.
 *
 * Uses OpenAI-compatible API format with Perplexity endpoints.
 * Provides web search grounded responses with citations.
 *
 * Default base URL: https://api.perplexity.ai
 * Available models: sonar-deep-research, sonar-reasoning-pro, sonar-reasoning, sonar-pro, sonar, r1-1776
 */
export declare class PerplexityProvider extends OpenAIProvider {
    readonly name = "perplexity";
    constructor(config: ProviderConfig);
    /**
     * Check if the provider is available and configured correctly.
     * Perplexity does NOT have a /models endpoint, so we use a minimal chat completion test.
     */
    healthCheck(): Promise<void>;
    /**
     * Get the base URL for API requests.
     * Exposed as protected method for use in healthCheck.
     */
    protected getBaseUrl(defaultUrl: string): string;
}
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