import type { GDriveAccessor } from '../../accessor/gdrive.ts';
import type { DeltaHook } from '../../watch/base.ts';
/**
 * Build the Google Drive delta hook.
 *
 * Drive addresses files by id and returns `parents` rather than paths, so a
 * whole-corpus `files.list` would still have to rebuild the tree before it
 * could name anything; the walk descends per folder instead, which is the same
 * shape `find` already uses here.
 *
 * Fingerprints on `modifiedTime`, which is what Drive stat reports. Drive also
 * has `changes.list` with a page token, an account-wide feed that is cheaper
 * than any walk and would have to be filtered back down to the watch root; that
 * belongs behind `pull` as a fast path, with this walk as its reset.
 */
export declare function buildDeltaHook(accessor: GDriveAccessor): DeltaHook;
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