/**
 * The React Query key for a provider's file tree.
 *
 * Shared so every consumer observes the *same* cache entry: the sidebar and
 * the wikilink index both read it, and React Query then dedupes the recursive
 * `getTree()` walk into a single fetch rather than one per observer. A copy of
 * this key that drifted by even a character would silently double the IPC.
 */
export function treeQueryKey(providerId: string) {
  return ['tree', providerId] as const;
}