Overview This version provides a complete internal reconstruction of the AWS outage (October 20–31, 2025 and the Q3 Financial Report Summary released by Oct 31 2025); including system behaviors, logs, API failures, DNS mechanics, AI continuity impacts, and the detailed ‘Felt vs Observed’ analysis. This is an internal technical document for architecture, security, and resilience study. Root Cause and Race Condition Sequence The race condition in the DynamoDB DNS management lay

The Existence of Shopping Cart across different layers of Domain. Tightly Coupled or Loosly Coupled?

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