/**
 * Detect whether cloud sync has already been configured for this HQ directory.
 *
 * Checks for the presence of `.hq-cloud/` config directory or a
 * `.hq-cloud-config.json` file that would indicate a prior sync setup.
 *
 * This is a local-only stub — the full cloud detection (checking remote S3
 * for existing files) happens via `@indigoai/hq-cloud` during the setup flow.
 */
export declare function detectExistingSync(targetDir: string): Promise<boolean>;
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