GitHub for Visual Studio has enhanced its pull request experience by introducing check runs and annotations, offering reviewers more detailed insights into code changes. This feature allows the integration of GitHub applications that generate annotations, providing feedback such as errors, warnings, and information directly inline with the code, using specific color codes for easy identification. Reviewers can click on annotations for more details, and these integrations can be customized to address various file types and coding standards. Applications like Build Cross Check, Yamburger, Kubevalidator, Prosebot, and Linter-Alex demonstrate the flexibility of the system by offering targeted checks for different programming and documentation needs. The new functionality aims to improve the thoroughness and sensitivity of code reviews, inviting users to test the feature and provide feedback through GitHub's communication channels.