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

# Add traces to a dataset

> Build a test set from real production traces by adding them to a dataset from the trace list, search results, or a signal.

<Info>
  **Where this fits:** Part of **Refine**. It turns the traces behind a failure into reusable rows in a [dataset](./overview), ready for [regression testing](../test-and-fix/regression-testing).
</Info>

The most realistic test cases are the interactions that actually happened. You can add traces to a dataset directly from where you find them: the trace list, [Search](../search/overview) results, or a [signal](../signals/overview).

## Add selected traces

<Steps>
  <Step title="Select the traces">
    In the trace list or search results, select one or more traces. To capture every trace behind a problem, open a [signal](../signals/overview) and add its traces.
  </Step>

  <Step title="Choose Add to Dataset">
    Use **Add to Dataset**. A dialog lets you add the traces to an existing dataset or create a new one in the same step.
  </Step>

  <Step title="Confirm">
    Each trace becomes a row: the trace input becomes the row **input**, and the agent response becomes the row **output**.
  </Step>
</Steps>

## Add a whole cohort

You are not limited to hand-picked traces. When you add to a dataset from a filtered view, a saved search, or a signal, the matching traces are added as a group, so a [saved search](../search/saved-searches) for a behaviour or a signal's full set of failures becomes a dataset in one action.

## Next step

* [Add expected output](./expected-output): record what the agent should have done so a test can check against it.