Cursor + Claude: stop shipping flaky API clients

I generate a typed API client from an OpenAPI file. I run contract tests locally with zero servers. I make Cursor fix only what the tests prove. I ship fewer “it works on my laptop” bugs. Context I build small SaaS projects. Usually solo. Usually fast. My most common failure mode isn’t UI. It’s the boring glue code between frontend and backend. I’d tweak an endpoint. Rename a field. Change a status code. Then ship. Next day: runtime errors. Cannot read properties of undefined . Or worse. Silent