Hoang delivered per-route CORS configuration support for the aws/aws-sam-cli repository, enabling developers to define CORS policies at the individual route level rather than globally. Using Python, Hoang updated the routing layer so that the Route class now accepts a CORS parameter, and modified the API provider to apply these granular settings. This approach allows for more precise access control and reduces cross-origin errors in serverless applications. Hoang’s work focused on backend and API development, with thorough testing to ensure reliability. The feature enhances both security and flexibility for AWS SAM CLI users, reflecting a thoughtful and targeted engineering contribution.