> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chief.bot/llms.txt
> Use this file to discover all available pages before exploring further.

# Deduplication — avoiding repeat reports

> A recurring Action can drift into repeating the same findings week after week.

## Report only what's new

A recurring [Action](/help/actions-automation/what-are-actions) can drift into repeating the same findings week after week. Deduplication fixes that: Chief reviews the Action's previous results before writing the next one, so each run delivers genuinely new information.

## How it turns on

<Frame>
  <img src="https://mintcdn.com/chief-2d405d1a/ZjT7ckngTj8rjHF7/images/help/actions-savelibrary.png?fit=max&auto=format&n=ZjT7ckngTj8rjHF7&q=85&s=bd6d4a8169fb5d2730de4098cb9610a3" alt="Chief: Deduplication — avoiding repeat reports — How it turns on" width="2880" height="1452" data-path="images/help/actions-savelibrary.png" />
</Frame>

Deduplication is wired to [**Save to Library**](/help/actions-automation/saving-action-output-to-your-library). When you check **Save each Action run's output to my Library as a file with label** and pick [a Label](/help/labels/creating-customizing-labels-colors-icons), Chief automatically adds a line to the top of your prompt — something like "First, check the previous Action results in my Library regarding \[your Label]… provide net new information without duplicating past results." Because past runs are saved under that Label [in your Library](/help/your-knowledge-library/what-is-the-library), each new run can read them and skip what it already covered.

When this happens you'll see a green notice in the dialog: *"I've updated your prompt to use this label to check for past results before running."*

## Turning it off

If you'd rather not deduplicate, click **Undo** in that green notice. Chief removes the auto-added line from your prompt, and runs will no longer compare against past results.

<Note>
  ℹ️ **Good to know:** The dedup line is just text inserted into your prompt — you can see it, edit it, or delete it like anything else you typed. If you delete it manually, Chief respects that and won't re-add it.
</Note>

## FAQ

<AccordionGroup>
  <Accordion title="Why didn't deduplication appear?">
    It only kicks in when Save to Library is on and at least one Label is selected — that Label is what Chief uses to find past results. Turn on Save to Library and pick a Label.
  </Accordion>

  <Accordion title="My report came back nearly empty — could dedup be the cause?">
    Yes. If there genuinely isn't much new since the last run, a deduplicating Action will say so rather than repeat old findings. To get a full re-summary, click Undo on the dedup notice or [run the Action](/help/actions-automation/viewing-run-history-running-manually) without the dedup line.
  </Accordion>

  <Accordion title="Does dedup work without saving to the Library?">
    No. Chief compares against the saved, Labeled runs in your Library, so Save to Library with a Label is required.
  </Accordion>
</AccordionGroup>