controllers-contract-openapi

Enforcing consistent DTOs and updating ProducesResponseType attributes aligns API contracts between controllers and OpenAPI. This standardizes response schemas, requires explicit 200 OK responses, and ensures non-anonymous response objects with camelCase JSON field names.

OpenAPI schema mismatches occur when DTOs and response status codes are not explicitly standardized. Applying consistent ProducesResponseType attributes and enforcing non-anonymous response objects ensures the generated OpenAPI specification matches the actual controller output.

Standardizing error formats in an OpenAPI contract requires using consistent ProblemDetails or ValidationProblemDetails responses. This approach ensures all API errors follow a uniform schema, making the OpenAPI specification accurate and the API contract reliable.

Update ProducesResponseType attributes by explicitly defining expected status codes like 200 OK and binding them to non-anonymous DTOs. This enforces schema compatibility and guarantees the OpenAPI specification accurately reflects controller response types.

OpenAPI contract alignment enforces camelCase JSON field names across all request and response DTOs. This ensures the C# API serialization settings match the OpenAPI schema expectations, providing consistent field naming throughout the API contract.