import { AIProviderName } from "../constants/enums.js";
import type { NeurolinkCredentials } from "../types/index.js";
import { OpenAIChatCompletionsProvider } from "./openaiChatCompletionsBase.js";
/**
 * OpenRouter Provider — direct HTTP, no AI SDK.
 *
 * OpenAI-compatible unified gateway to 300+ models from 60+ providers. All
 * request/stream/tool-loop orchestration lives in
 * `OpenAIChatCompletionsProvider`; this class declares configuration plus the
 * OpenRouter-specific behaviour:
 *
 *   1. Attribution headers — optional `HTTP-Referer` / `X-Title` (from
 *      `OPENROUTER_REFERER` / `OPENROUTER_APP_NAME`) are merged into every
 *      request via `getAuthHeaders` so usage shows up on the openrouter.ai
 *      activity dashboard.
 *   2. Per-model tool gating — OpenRouter proxies many models with varying
 *      tool support, so `supportsTools()` consults a cached capability set
 *      (populated by `cacheModelCapabilities()`) and falls back to a
 *      conservative known-capable pattern list.
 *   3. Dynamic model discovery — `getAvailableModels()` fetches the live
 *      `/models` list (10-minute cache) with a hardcoded fallback.
 *
 * @see https://openrouter.ai/docs
 */
export declare class OpenRouterProvider extends OpenAIChatCompletionsProvider {
    private readonly referer?;
    private readonly appName?;
    private static modelsCache;
    private static modelsCacheTime;
    private static readonly MODELS_CACHE_DURATION;
    private static toolCapableModels;
    private static capabilitiesCached;
    constructor(modelName?: string, sdk?: unknown, _region?: string, credentials?: NeurolinkCredentials["openrouter"]);
    protected getProviderName(): AIProviderName;
    protected getDefaultModel(): string;
    protected formatProviderError(error: unknown): Error;
    protected getFallbackModelName(): string;
    /**
     * Attribution headers are merged into every request alongside the bearer
     * token so OpenRouter can attribute usage on its activity dashboard.
     */
    protected getAuthHeaders(): Record<string, string>;
    /**
     * OpenRouter proxies models with varying tool support. Use cached
     * capabilities when available (populated by `cacheModelCapabilities()`),
     * otherwise fall back to a conservative known-capable pattern list and
     * disable tools for unknown models.
     */
    supportsTools(): boolean;
    /**
     * Models/capabilities endpoint, derived from the configured `baseURL` so a
     * custom OpenRouter-compatible gateway is honoured for discovery too.
     */
    private getModelsUrl;
    /**
     * Get available models from the OpenRouter `/models` endpoint, with a
     * 10-minute cache and a hardcoded fallback when the fetch fails.
     */
    getAvailableModels(): Promise<string[]>;
    /**
     * Fetch available models from the OpenRouter `/models` endpoint.
     * @private
     */
    private fetchModelsFromAPI;
    /**
     * Type guard to validate the models API response structure.
     * @private
     */
    private isValidModelsResponse;
    /**
     * Fetch and cache model capabilities from the OpenRouter `/models` endpoint.
     * Call this to enable accurate per-model tool support detection.
     */
    cacheModelCapabilities(): Promise<void>;
}