Worked on the NHSDigital/identity-service-jwks repository with a focus on maintaining API stability and backward compatibility. During the month, addressed a critical integration issue by rolling back previously implemented ftrs-search API changes, restoring the original API behavior to minimize disruption for downstream clients. The technical approach involved a controlled reversion using Git and TypeScript, ensuring that the API surface remained consistent and reliable for existing integrations. No new features were introduced, as the primary objective was to resolve a regression and safeguard client workflows. This work emphasized risk mitigation and careful change management within a Node.js and RESTful API environment.