Katie Chapman worked on the circleci/ex repository, focusing on backend and API development using Go. During February 2025, she completed an API cleanup as part of the RT-724 migration, specifically removing support for GET requests with a body. This change aligned the API with REST conventions, reducing non-standard usage and simplifying client interoperability. By eliminating deprecated behavior, Katie improved the maintainability and future-proofing of the codebase. Her work centered on HTTP client interactions and backend logic, ensuring the API design was standardized and easier to support. The depth of her contribution addressed both technical debt and long-term code quality.