import type { ChatMessage, AnalysisResponse, ParsedModel } from "../types.js";
import type { ProviderConfig, ResponseFormat } from "./types.js";
/**
 * Options for fallback behavior on cold starts
 */
export interface FallbackOptions {
    /** Enable fallback to always-on endpoint on timeout. Default: true for superagent provider */
    enableFallback?: boolean;
    /** Timeout in milliseconds before falling back. Default: 5000 */
    fallbackTimeoutMs?: number;
    /** Custom fallback URL. If not provided, uses env var or default */
    fallbackUrl?: string;
}
/**
 * Default model for guard() when no model is specified
 */
export declare const DEFAULT_GUARD_MODEL = "superagent/guard-1.7b";
/**
 * Registry of supported providers
 */
export declare const providers: Record<string, ProviderConfig>;
/**
 * Parse a model string in "provider/model" format
 * @example "openai/gpt-4o" -> { provider: "openai", model: "gpt-4o" }
 */
export declare function parseModel(modelString: string): ParsedModel;
/**
 * Get the provider configuration for a given provider name
 */
export declare function getProvider(providerName: string): ProviderConfig;
/**
 * Call an LLM provider with the given messages.
 * If `fallbackModelString` is set and the primary model returns a retryable
 * status code, the request is re-issued against the fallback model.
 */
export declare function callProvider(modelString: string, messages: ChatMessage[], responseFormat?: ResponseFormat, fallbackOptions?: FallbackOptions, fallbackModelString?: string): Promise<AnalysisResponse>;
export type { ProviderConfig, ResponseFormat, JsonSchema } from "./types.js";
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