Cosmo Router has added field-level authorization for GraphQL Federation, allowing developers to use a policy-as-code workflow to control access to their federated APIs. This feature enables teams to define granular access control policies and improves transparency, security, and compliance. It also allows for the merging of scopes across Subgraphs and enables features like returning partial data or failing the whole request if an agent doesn't have the required scopes. The Cosmo Router is now the most advanced Open Source GraphQL Federation Router available today, with a formal specification being developed to define the behavior of Federation directives and their interaction with each other. To get started with field-level authorization, developers can follow the Cosmo Documentation for the added directives `@requiresScopes` and `@authenticated`.