Christopher Stacey worked on the hmcts/cnp-api-docs repository, focusing on deprecating and removing the CaTH Subscription and Channel Management APIs. He refactored the backend to eliminate obsolete API paths and updated the frontend to remove dependencies on these services, enabling independent evolution of both layers. Using Markdown for documentation management, Christopher ensured that technical and product documentation accurately reflected the new system boundaries. His work reduced the maintenance burden and improved compliance by simplifying the codebase. The depth of the changes, though limited to a single feature, addressed both architectural decoupling and documentation, supporting parallel development and future scalability.