/**
 * [WHO]: ApiProvider, registerApiProvider, registerApiProviderLoader, getApiProvider, ensureApiProvider, reset helpers
 * [FROM]: Depends on core AI stream/model types for provider contracts
 * [TO]: Consumed by core/lib/ai/src/stream.ts and providers/register-builtins.ts for provider dispatch
 * [HERE]: core/lib/ai/src/api-registry.ts - provider registry plus runtime lazy-loader registry
 */
import type { Api, AssistantMessageEventStreamContract, Context, Model, SimpleStreamOptions, StreamFunction, StreamOptions } from "./types.js";
export type ApiStreamFunction = (model: Model<Api>, context: Context, options?: StreamOptions) => AssistantMessageEventStreamContract;
export type ApiStreamSimpleFunction = (model: Model<Api>, context: Context, options?: SimpleStreamOptions) => AssistantMessageEventStreamContract;
export interface ApiProvider<TApi extends Api = Api, TOptions extends StreamOptions = StreamOptions> {
    api: TApi;
    stream: StreamFunction<TApi, TOptions>;
    streamSimple: StreamFunction<TApi, SimpleStreamOptions>;
}
export interface ApiProviderInternal {
    api: Api;
    stream: ApiStreamFunction;
    streamSimple: ApiStreamSimpleFunction;
}
export type ApiProviderLoader<TApi extends Api = Api, TOptions extends StreamOptions = StreamOptions> = () => Promise<ApiProvider<TApi, TOptions>>;
export declare function registerApiProvider<TApi extends Api, TOptions extends StreamOptions>(provider: ApiProvider<TApi, TOptions>, sourceId?: string): void;
export declare function registerApiProviderLoader<TApi extends Api, TOptions extends StreamOptions>(api: TApi, loader: ApiProviderLoader<TApi, TOptions>, sourceId?: string): void;
export declare function getApiProvider(api: Api): ApiProviderInternal | undefined;
export declare function ensureApiProvider(api: Api): Promise<ApiProviderInternal | undefined>;
export declare function getApiProviders(): ApiProviderInternal[];
export declare function unregisterApiProviders(sourceId: string): void;
export declare function clearApiProviders(): void;