---
title: "Breadcrumbs"
description: "Learn more about what Sentry uses to create a trail of events (breadcrumbs) that happened prior to an issue."
url: https://docs.sentry.io/platforms/unreal/enriching-events/breadcrumbs/
---

# Breadcrumbs | Sentry for Unreal Engine

##### Hey... did you mean Logs? Sentry has them now!

Manual breadcrumbs had a good run, but [Sentry's got logs](https://docs.sentry.io/platforms/unreal/logs.md). Structured, searchable, and way easier to alert or query on. Check them out!

Sentry uses *breadcrumbs* to create a trail of events that happened prior to an issue. These events are very similar to traditional logs, but can record more rich structured data.

This page provides an overview of manual breadcrumb recording and customization. Learn more about the information that displays on the **Issue Details** page and how you can filter breadcrumbs to quickly resolve issues in [Using Breadcrumbs](https://docs.sentry.io/product/error-monitoring/breadcrumbs.md).

##### Learn about SDK usage

Developers who want to modify the breadcrumbs interface can learn more in our [developer documentation about the Breadcrumbs Interface](https://develop.sentry.dev/sdk/foundations/transport/event-payloads/breadcrumbs/).

## [Manual Breadcrumbs](https://docs.sentry.io/platforms/unreal/enriching-events/breadcrumbs.md#manual-breadcrumbs)

You can manually add breadcrumbs whenever something interesting happens. For example, you might manually record a breadcrumb if the user authenticates or another state change occurs.

Manually record a breadcrumb:

```cpp
USentrySubsystem* SentrySubsystem = GEngine->GetEngineSubsystem<USentrySubsystem>();

TMap<FString, FSentryVariant> AdditionalData;
AdditionalData.Add("SomeKey", "SomeValue");

SentrySubsystem->AddBreadcrumbWithParams("Message", "Category", "Type", AdditionalData, ESentryLevel::Info);
```

The same result can be achieved by calling corresponding function in blueprint:

## [Automatic Breadcrumbs](https://docs.sentry.io/platforms/unreal/enriching-events/breadcrumbs.md#automatic-breadcrumbs)

The Unreal Engine SDK can capture certain types of breadcrumbs automatically. Those can be enabled using the Sentry configuration window at **Project Settings > Plugins > Sentry**.

## [Customize Breadcrumbs](https://docs.sentry.io/platforms/unreal/enriching-events/breadcrumbs.md#customize-breadcrumbs)

SDKs allow you to customize breadcrumbs through the `BeforeBreadcrumb` hook (the corresponding handler class can be set in the plugin settings).

This hook is passed an already assembled breadcrumb and, in some SDKs, an optional hint. The function can modify the breadcrumb or decide to discard it entirely by returning `nullptr`.

Avoid adding breadcrumbs or logging (for example, via `UE_LOG`) inside the `BeforeBreadcrumb` handler. The SDK prevents recursive calls by skipping reentrant invocations — the breadcrumb will still be captured, but your custom handler won't be called for it.

```cpp
UCLASS()
class UCustomBeforeBreadcrumbHandler : public USentryBeforeBreadcrumbHandler
{
	GENERATED_BODY()

public:
	virtual USentryBreadcrumb* HandleBeforeBreadcrumb_Implementation(USentryBreadcrumb* Breadcrumb, USentryHint* Hint)
    {
        if (Breadcrumb->GetCategory() == "Spammy.Logger")
        {
            // Discard breadcrumb
            return nullptr;
        }

        return Breadcrumb;
    }
};
```