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Short summary

A commit in hermes-memory-installer formalizes a three-level severity classification for stale entries in the gbrain metadata cache: low (no impact), medium (warning + auto-invalidate), and high (fatal + watchdog reset). The decision was backed by real incident data showing medium-severity staleness caused 12% of eviction loops and high-severity caused two production outages. The article argues that explicit decision records prevent tribal knowledge erosion and ensure consistent error handling across teams.

• •Stale cache entries classified into low/medium/high severity based on read-path criticality
• •Real incident data justified the thresholds: 12% of eviction loops and 2 production outages
• •Decision records preserve rationale and prevent re-debating the same tradeoffs

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