The new GraphQL CI tool in Apollo Studio aims to prevent downtime by ensuring that changes made to the GraphQL schema are backwards compatible. This is achieved through a redesigned experience that prioritizes giving users the most important information, including better visibility into which clients are affected and how, as well as the ability to override changes at the change-level and operation-level. Additionally, a centralized configuration has been introduced, allowing teams to align on best practices and share information about deprecated clients and operations, providing a more streamlined experience for safely evolving GraphQL schema in production.