API contract designer playbook

- A thread outlined the practical API Contract Designer role: picking REST/GraphQL/gRPC, versioning rules, error models, and auth expectations for cross-client teams. - The breakdown focused on concrete governance items that stop teams from shipping divergent clients and increase API stability for mobile, web and partner integrations. - The guide emphasises clear backwards-compat rules and ownership, useful for coordinating multi-team rollouts and reducing integration rework. (x.com)