The PWN- and Active-stage backfills both run automatically via server-side cron jobs — see backfill progress for live status. Active also perpetually recrawls (new folders first, then oldest-refresh) once its initial backfill finishes, the same way PWN always has. PWC stays small and stable enough to review by hand (see the Tools page for manual triggers) — it's mainly there to confirm the pipeline itself is accurate. Real-time Dropbox sync (reprocessing a folder within moments of a change, instead of waiting for the next backfill/recrawl pass) is handled by webhook_delta_processor.php on its own cron schedule — see the Sync card above for whether it's currently running. Either way, the backfill/recrawl passes stay in place as a backstop, since Dropbox's webhook delivery is best-effort, not guaranteed.