Bringing LLM Memory Regression Tests from 30 Minutes Down to 90 Seconds with pytest + Redis

At 2:17 a.m., a chain of alarms yanked me out of sleep — the LLM in production had suddenly "lost its memory." One moment users were discussing project timelines, the next it was naïvely asking "How can I help you?" After digging through logs, I found the culprit: a single line change to Redis’s expiry policy during a memory-store release. Nobody had tested the memory persistence flow before deployment, causing every session’s context to expire within 5 minutes. While fixing the bug, I cursed to...