Introducing Contracts: serve many audiences with a unified graph

Vivek Ravishankar from Apollo introduces Contracts, a new feature in preview on the Enterprise plan that allows creating tailored graphs for different audiences by applying filters to a single unified graph. This enables serving multiple different audiences with a single unified graph while maintaining modularity and independence for separate APIs. Contracts work with a simple but powerful `@tag` directive, allowing users to create filter rules which include or exclude certain tags, removing unnecessary parts from the client-facing schema while still being included in the internal supergraph schema. Contracts can be used as documentation or as a running endpoint, with Apollo Studio providing a streamlined developer experience for internal developers and Apollo Gateway/Router enabling restricted access for external partners or public APIs. With Managed Federation, contracts automatically remain up-to-date without manual work, making it an attractive solution for independent backend service teams.

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