Worked on the apollographql/rover repository, focusing on backend and full stack development using Rust and GraphQL. Delivered a targeted bug fix that addressed an issue with the --graph-ref input, where the supergraph configuration root was not correctly resolved if the configuration was provided via stdin. This update improved the reliability of the rover dev workflow by ensuring the root path is accurately determined in all input scenarios. The solution enhanced CLI input handling and error messaging, reducing startup errors and improving the developer experience during local development and CI runs. Demonstrated attention to robust API and backend engineering practices.