api-and-interface-design

You can design a stable REST API contract by defining typed request and response schemas, establishing versioning rules, and enforcing backward compatibility checks before implementation to prevent breaking changes.

Contract-first API design defines schemas, validation strategies, and versioning rules before writing implementation code. You need it when building new endpoints or modifying public modules to ensure reliable software evolution and consistent integration behavior.

Yes, this approach works for GraphQL schemas and SDK interfaces by applying consistent naming, validation, and error structures. It establishes quality standards across REST, GraphQL, SDKs, and component props to maintain stable public boundaries.

Handle error handling and validation in interface design by establishing consistent error structures and validation strategies within your typed contracts. This creates maintainable interfaces that protect consumers from unexpected integration failures.

The best way to version an API for backward compatibility is to define explicit versioning rules and compatibility checks during the contract-first design phase. This prevents fragile designs by ensuring typed contracts support reliable software evolution.