/**
 * Deprecation warning for v1 SDK packages.
 *
 * This module logs a deprecation warning when v1 packages are used,
 * recommending migration to v2.
 *
 * The warning is only shown once per process to avoid noise.
 */
import type { Logger } from './logger.ts';
/**
 * Show deprecation warning for v1 packages.
 *
 * @param logger - Optional logger instance (falls back to console)
 */
export declare function showDeprecationWarning(logger?: Logger): void;
/**
 * Check if the current package is v1.
 */
export declare function isV1Package(): boolean;
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