OpenAPI-first development: letting agents write your test suite

The workflow that's changed how we build APIs:\n\n1. Write the OpenAPI spec first (contract-first design)\n2. Nova generates a complete test suite from the spec\n3. We implement against the tests\n4. Nova runs regression tests on every commit\n5. Nova flags when the implementation drifts from the spec\n\nThe key insight: the spec is a contract. The tests are the enforcement. When both are generated from the same source of truth, you stop arguing about what the API should do and start building what it does.\n\nSide effect: our API docs are always accurate because they come from the same spec as the tests. No more stale Postman collections.