/**
 * Sync operation core module.
 *
 * Provides the `systemSync` function and `SyncData` interface for the
 * `cleo admin sync` CLI command. In native mode there are no external sync
 * targets, so this is a no-op that reports zero synced items.
 *
 * @task T4631
 * @task T1571
 */
/** Result of a sync operation. */
export interface SyncData {
    /** Sync direction (up, down, both). */
    direction: string;
    /** Number of items synced. */
    synced: number;
    /** Number of sync conflicts detected. */
    conflicts: number;
    /** Human-readable status message. */
    message: string;
}
/**
 * Sync check (no-op in native mode).
 *
 * Reports that sync is unavailable because there are no external sync
 * targets configured in native mode. This is the canonical no-op
 * implementation moved from system-engine.ts.
 *
 * @param _projectRoot - Absolute path to the project root (unused)
 * @param params - Optional parameters including sync direction
 * @returns Sync result with zero synced items
 *
 * @task T4631
 * @task T1571
 */
export declare function systemSync(_projectRoot: string, params?: {
    direction?: string;
}): SyncData;
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