When building serverless apps, your frontend is often faster than your database's replication speed. 🏃‍♂️💨 The Problem: My AI Agent was suffering from "Ghost Data". After a user updated their profile, the AI would still use the old data for its analysis. The Cause: Eventual Consistency. DynamoDB was still syncing the new name across nodes while the frontend was already asking for a response. The Fix (React + Python): I implemented a tactical 1.5s delay in the UI during the "Provisioning" state to give the cloud time to settle. On the backend, I modified the cache key generation: Python Before: Only used transactions for the cache key cache_key = generate_cache_key(items, income, expenses, tone, user_id) After: Included display_name to force a cache break on name changes cache_key = generate_cache_key(items, income, expenses, f"{tone}_{display_name}", user_id) Infrastructure Hardening (SES + Route 53): To fix Spam issues in Yahoo, I moved the DNS to Route 53 and published: Custom MAIL FROM:…