/**
 * OpenRouter provider-routing preferences.
 *
 * OpenRouter lets the caller bias which upstream provider its router
 * picks for a given model — useful for cost, latency, geography, or
 * privacy reasons. The shape we send in the request body's `provider`
 * field follows the OpenRouter spec
 * (https://openrouter.ai/docs#provider-routing):
 *
 *   {
 *     "order":          ["DeepInfra", "Together"],   // try first in order
 *     "allow_fallbacks": true,                        // fall back to others if order fails
 *     "ignore":         ["OpenAI"],                   // never use these
 *     "data_collection": "deny" | "allow",            // privacy gate
 *     "require_parameters": true,                     // strict spec compliance
 *   }
 *
 * We store the user's preferences in `conf` so they persist across CLI
 * launches. Empty / unset means "let OpenRouter route freely".
 */
export interface OpenRouterPreferences {
    order?: string[];
    allow_fallbacks?: boolean;
    ignore?: string[];
    data_collection?: 'allow' | 'deny';
    require_parameters?: boolean;
}
/**
 * Return the user's stored preferences, or null if none set. Returning
 * null (vs empty object) lets `agentChat` omit the `provider` field
 * entirely — OpenRouter is happier with no field than with an empty one.
 */
export declare function readOpenRouterPreferences(): OpenRouterPreferences | null;
export declare function writeOpenRouterPreferences(prefs: OpenRouterPreferences | null): void;
/** Render preferences for `/openrouter` command output. */
export declare function formatOpenRouterPreferences(prefs: OpenRouterPreferences | null): string;