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

# Add a grader

Add a grader to your project to check simulations, production conversations, or both. **Expected behaviors** already applies to all simulations and cannot be removed.

## Use a grader from the library

<Tabs>
  <Tab title="UI">
    1. Open **Graders** and select **Grader library**.
    2. Open the menu for the grader you want and select **Use in project**.
    3. Find it in **Active graders** and select **Edit** to review its model, scope, settings, and pass threshold.
    4. Save the settings before starting new work.

    See [Types of graders](/docs/platform/graders/types) and [Built-in graders](/docs/platform/graders/built-in-graders) to choose a suitable check.
  </Tab>

  <Tab title="API">
    [List the grader library](/api-reference/list-grader-library), then [use a grader in your project](/api-reference/use-grader-in-project). [Update the project grader](/api-reference/update-grader) to set its scope and settings.
  </Tab>
</Tabs>

## Create your own grader

Use [Create a custom grader](/docs/platform/graders/custom-graders) when you need instructions specific to your agent.

## Check its results

Start a new run or review an eligible production conversation. Read the grader's score, result, and evidence. See [Update a grader](/docs/platform/graders/configure-graders) to change its scope or settings.