import { LLMModel, LLMProvider } from '../types';
/**
 * The default LLM provider, resolved from LLM_DEFAULT_PROVIDER env var.
 * Falls back to 'openai'.
 */
export declare const LLM_DEFAULT_PROVIDER: LLMProvider;
/**
 * Per-tier provider overrides. Each falls back to LLM_DEFAULT_PROVIDER.
 */
export declare const LLM_MINI_PROVIDER: LLMProvider;
export declare const LLM_NORMAL_PROVIDER: LLMProvider;
export declare const LLM_ADVANCED_PROVIDER: LLMProvider;
export declare const LLM_PROVIDER: LLMProvider;
/**
 * The default model to use when no model is specified.
 * Resolution order: AI_MODEL env var → default provider's normal tier
 */
export declare const DEFAULT_MODEL: LLMModel;
/**
 * Model tier values resolved from env vars.
 *
 * Resolution order per tier:
 *   1. LLM_MODEL_MINI / LLM_MODEL_NORMAL / LLM_MODEL_ADVANCED (explicit model override)
 *   2. PROVIDER_DEFAULT_MODELS[tier-specific provider][tier] (provider default for tier)
 *
 * The tier-specific provider is:
 *   LLM_MINI_PROVIDER → falls back to LLM_DEFAULT_PROVIDER
 *   LLM_NORMAL_PROVIDER → falls back to LLM_DEFAULT_PROVIDER
 *   LLM_ADVANCED_PROVIDER → falls back to LLM_DEFAULT_PROVIDER
 */
export declare const LLM_MODEL_MINI: LLMModel;
export declare const LLM_MODEL_NORMAL: LLMModel;
export declare const LLM_MODEL_ADVANCED: LLMModel;
export declare const PERPLEXITY_MODEL: string;
export declare const PERPLEXITY_API_URL = "https://api.perplexity.ai/chat/completions";
export interface Config {
    DEFAULT_MODEL: string;
    LLM_DEFAULT_PROVIDER: LLMProvider;
    LLM_MINI_PROVIDER: LLMProvider;
    LLM_NORMAL_PROVIDER: LLMProvider;
    LLM_ADVANCED_PROVIDER: LLMProvider;
    LLM_MODEL_MINI: string;
    LLM_MODEL_NORMAL: string;
    LLM_MODEL_ADVANCED: string;
    PERPLEXITY_MODEL: string;
    PERPLEXITY_API_URL: string;
}
declare const config: Config;
export default config;