A production rollout exposes a contract mismatch between the UI boundary and the owning service. The affected area is checkout flow.
Repair the checkout flow tests implementation so it classifies stable, flaky, and consistently failing tests from repeated independent runs.
Evidence
- Affected surface: Full-stack frontend focus / checkout flow.
- Observed failure family: triage an unreliable test suite.
- Scope policy: cohort must equal stable.