import { InitializeOptions } from "../interfaces";
import { TraceloopClient } from "../client/traceloop-client";
export declare let _configuration: InitializeOptions | undefined;
/**
 * Initializes the Traceloop SDK and creates a singleton client instance if API key is provided.
 * Must be called once before any other SDK methods.
 *
 * @param options - The options to initialize the SDK. See the {@link InitializeOptions} for details.
 * @returns TraceloopClient - The singleton client instance if API key is provided, otherwise undefined.
 * @throws {InitializationError} if the configuration is invalid or if failed to fetch feature data.
 *
 * @example
 * ```typescript
 * initialize({
 *   apiKey: 'your-api-key',
 *   appName: 'your-app',
 * });
 * ```
 */
export declare const initialize: (options?: InitializeOptions) => TraceloopClient | undefined;
/**
 * Gets the singleton instance of the TraceloopClient.
 * The SDK must be initialized with an API key before calling this function.
 *
 * @returns The TraceloopClient singleton instance
 * @throws {Error} if the SDK hasn't been initialized or was initialized without an API key
 *
 * @example
 * ```typescript
 * const client = getClient();
 * await client.annotation.create({ annotationTask: 'taskId', entityInstanceId: 'entityId', tags: { score: 0.9 } });
 * ```
 */
export declare const getClient: () => TraceloopClient;
//# sourceMappingURL=index.d.ts.map