When you open a pull request in GitHub, Sentry will comment and inform you if there are any unhandled issues being caused by the functions you are modifying in your PR so that you can fix issues while you already have the necessary context.

Not sure if you are already using the Github App integration? Go to your settings (or have your admin visit)

In case you already use the GitHub integration, you simply need to ensure you've setup Stack Trace Links which is all you need for these comments to show up on your pull requests

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