GraphQL contracts for mobile product teams

GraphQL is most valuable for mobile teams when it becomes a product contract, not just a transport layer. The schema should make the screen states understandable before the app code starts guessing.

Model states, not only fields

Mobile screens usually need to distinguish loading, unavailable, unauthenticated, empty, partial, and ready states. If the API makes those states implicit, the app accumulates defensive code and unclear fallback behavior.

Keep queries close to the flow

I like mobile queries to map to recognizable product flows. The name of the operation should tell a reviewer which screen or task it supports, and the returned shape should avoid pulling unrelated product concerns into the same render path.

Version by behavior

Breaking a field is not the only way to break a mobile app. Changing semantics can be just as risky. Contract review should include examples, nullability, cache behavior, and what older app versions will do with the response.