openapi-contract-first

Resolve OpenAPI contract drift by authoring specs in openapi.yaml and validating changes against a diff baseline. This approach enforces ADRs for breaking changes and ensures non-breaking deployments before generating DTOs or wiring controllers.

The contract-first approach involves editing your OpenAPI specification first, then using openapi-generator to automatically generate DTOs and interfaces. This ensures your Spring Boot controllers and data models stay synchronized with the API contract.

Validate OpenAPI changes by running a diff gate against a baseline specification. This diff-based gating mechanism detects breaking changes, enforces architectural decision records, and prevents non-compliant API modifications from being deployed.

Yes, you can scaffold and wire Spring Boot controllers for new or changed endpoints directly from the OpenAPI spec. After editing openapi.yaml, generate DTOs with openapi-generator and implement the controller interfaces to match the contract.

Yes, openapi-generator works alongside springdoc to validate OpenAPI contracts in Spring Boot. While openapi-generator creates DTOs and interfaces from the spec, springdoc and baseline diffs ensure the implementation matches the authored openapi.yaml file.

Enforce ADRs for breaking API changes whenever you modify endpoints in openapi.yaml. The diff-based gating process identifies breaking changes during validation, requiring architectural decision records to approve and document any non-backward-compatible API modifications.