api-and-interface-design

Effective REST API design relies on a contract-first approach, respecting Hyrum's Law and the one-version rule to maintain backward compatibility. This ensures your endpoints remain stable and predictable as your software architecture evolves over time.

Consistent error semantics involve defining clear contracts and standardized error strategies for your interfaces. By validating data at the system boundary, you protect internal logic and return predictable, structured errors to clients.

Boundary validation involves enforcing strict validation at the edge of your system before processing requests. This approach protects internal logic from malformed data and ensures your public interface maintains a clear, secure contract.

Maintaining backward compatibility requires applying the one-version rule and adhering to a contract-first design. By anticipating Hyrum's Law, you ensure that changes to your public interface do not break existing API consumers.

A contract-first approach is essential when designing REST or GraphQL APIs and defining module boundaries. It establishes a clear agreement upfront, preventing misalignment between systems and ensuring your interface design remains robust.

Yes, these interface design principles apply to both public REST API endpoints and internal module boundaries. Defining clear contracts and validating at boundaries ensures stability across your entire software architecture.