Worked on improving the resiliency of the indexing API in the pksunkara/jj repository by redesigning the Index trait and its implementations to return Result types instead of directly returning vectors of commit identifiers. This approach enabled robust error handling and eliminated the use of unwraps that previously risked crashing production jobs. By leveraging Rust’s error handling capabilities and version control system expertise, the changes enhanced production safety, improved error propagation, and increased the reliability of downstream data pipelines. The work focused on operational stability, making indexing operations safer and more observable for ongoing monitoring and maintenance in production environments.