عرض عملي: اعتمادية مخفية اكتُشفت بحقن الأعطال

خطوة بخطوة

1. Hypothesis: if the recommendation service is down, checkout still works.
2. Inject the failure in staging.
3. Observe checkout failing; trace shows a synchronous config lookup that goes through the same service.
4. Planned mistake: declare the experiment a failure and stop. Fix: it succeeded, it found a weakness; record it.
5. Fix by caching config locally and adding a timeout with default.
6. Rerun to confirm, update the dependency map.