Teams spend a lot of time on regression testing . They write scripts to confirm that existing functionality still works after changes. Bugs still escape to production anyway. Not because the tests are poorly written, but because they test assumptions about how the system should behave, not observations of how it actually behaves. A regression test checks what a developer thinks will happen. Production reveals what actually happens. That gap is where escapes live. When a microservice changes its response format slightly, the test might still pass because it checks the expected structure, not the actual structure real clients use. When an integration point has undocumented implicit behavior, the test misses it. When two services interact in a timing pattern that only appears under load, the test does not catch it because it runs in isolation. Traditional regression testing writes test cases as predictions. A better approach captures what actually happens and tests against that. The...
A deployment starts failing late on a Friday evening. The initial assumption is that something changed in the application release. Teams start checking container images, Terraform plans and recent commits. Nothing looks wrong. A few hours later, someone discovers the actual issue: a deployment token tied to an old automation workflow expired months ago. The token was still being used by a pipeline nobody realized was active. The original engineer who created it had already moved to another team. Situations like this are becoming normal in modern delivery environments. Not because organizations suddenly lost visibility into human access, but because CI/CD systems now create machine identities constantly. Most of them are temporary. Some become permanent without anyone planning for it. A few years ago, infrastructure access mostly revolved around employees, administrators and service accounts that teams could track manually. That model no longer holds up very well. Today’s pipeline...