import { AIProvider, ProviderId, ProviderPreference } from "./types";
export declare function defaultProviderPreference(): ProviderPreference;
export declare function parseProviderPreference(input?: string): ProviderPreference | null;
export declare function listProviders(): AIProvider[];
export type ProviderResolution = {
    ok: true;
    provider: AIProvider;
    selected: ProviderId;
    requested: ProviderPreference;
} | {
    ok: false;
    requested: string;
    reason: "invalid" | "unavailable";
    details: string;
};
export declare function resolveProvider(requested?: string): ProviderResolution;