Reprocess a source

Reprocessing re-runs extraction on a source you've already uploaded. New transcript, new section detection, new PoK list. Useful when the source itself changed.

When to reprocess

• A YouTube video creator added or updated captions after you imported
• You uploaded a new version of a PDF (e.g., updated chapter, fixed errata)
• Initial OCR was poor and you want a retry (we improve OCR models periodically)
• Source language was misdetected and you want a fresh pass with override

If the source itself didn't change, reprocessing won't change anything — it's deterministic given the same input.

How

1. Open Sources from the sidebar
2. Click the source you want to reprocess
3. In the top-right of the source page, click Reprocess
4. Confirm. Reprocessing takes about as long as the original upload.

What happens to your existing data

This is the part that surprises people, so read carefully.

PoKs: Ritsu tries to match new PoKs to old ones by section title and content similarity.

• Matched: keeps the old PoK ID, your saved decks and quiz history stay attached.
• Unmatched (new section): a new PoK is created. No history yet.
• Unmatched (deleted section): the old PoK still exists, but the source's PoK list no longer shows it. Your decks tied to it remain accessible from your saved-decks page.

Saved decks + quiz history: never deleted by reprocessing. They live under PoK IDs, and matched PoKs keep their IDs.

Cached AI responses: discarded. Next time you run /explain etc., it generates fresh against the new source content.

Embeddings: rebuilt. /search results may shift slightly.

When NOT to reprocess

If you have lots of saved decks tied to specific PoKs and the source structure changed substantially, reprocessing may unmoor your decks. Specifically: if a single chapter got split into three sections, your decks all stay attached to the OLD chapter's PoK ID — you'll find them in saved-decks but they no longer appear in the source's PoK list.

Workaround: upload as a new source instead of reprocessing. The old source + decks stay intact; you decide which to keep using.

Tips

• Reprocess is idempotent. Running it twice gives the same result. No harm in retry.
• Background processing. Closing the tab is fine — reprocessing continues server-side.
• Free plan reprocess counts toward daily import quota. Pro is unlimited.