import type { OneDriveAccessor } from '../../accessor/onedrive.ts';
import type { DeltaHook } from '../../watch/base.ts';
/**
 * Build the OneDrive delta hook.
 *
 * Fingerprints on the item's `cTag`, which Graph moves only when the content
 * changes (`eTag` also moves on a metadata edit), so a rename does not read as
 * a content change.
 *
 * Graph has a native `/delta` feed with a resumable token, which is cheaper
 * than this walk and reports deletes directly. It is a fast path rather than a
 * replacement: Graph can answer `resyncRequired` at any time, and the only
 * response to that is a full listing. When it is added it belongs behind
 * `pull`, with this walk as its reset.
 */
export declare function buildDeltaHook(accessor: OneDriveAccessor): DeltaHook;
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