A federated GraphQL API is a multi-tiered architecture made up of independent components. GraphQL requests flow through multiple components to construct a response, which in turn flow back through those same components to create a response to send back to the caller.
Allowing teams to independently update the components they own is a key benefit of federation. However, understanding and de-risking changes to a component can be challenging, especially because changes might require cascading changes in other components. This is especially true for GraphQL schema definitions, which must be coordinated between subgraph services and the Router.
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