import type { AIProviderName } from "../constants/enums.js";
import type { NeurolinkCredentials } from "../types/index.js";
import { OpenAIChatCompletionsProvider } from "./openaiChatCompletionsBase.js";
/**
 * Perplexity Provider — direct HTTP, no AI SDK.
 *
 * Sonar models with built-in web grounding. OpenAI-compatible chat
 * completions at api.perplexity.ai. Best for queries that need fresh
 * web context (search-augmented answers + citations).
 *
 * All request/stream/tool-loop orchestration lives in
 * `OpenAIChatCompletionsProvider`; this class only declares configuration
 * and provider-specific error mapping.
 *
 * @see https://docs.perplexity.ai/api-reference/chat-completions
 */
export declare class PerplexityProvider extends OpenAIChatCompletionsProvider {
    constructor(modelName?: string, sdk?: unknown, _region?: string, credentials?: NeurolinkCredentials["perplexity"]);
    protected getProviderName(): AIProviderName;
    protected getDefaultModel(): string;
    protected getFallbackModels(): string[];
    protected formatProviderError(error: unknown): Error;
}