Definition
Plain language
When an AI assistant's housekeeping operations quietly drop something you'd later need.
As stated in the literature
In the agent-aging taxonomy, event-driven degradation caused by memory-compaction or pruning operations that discard low-priority entries which later turn out to be relevant.
Why it matters: It's a reminder that the cleanup logic itself can be a source of failure, not just a fix for accumulated junk.
For example, a nightly memory-pruning job drops what looks like an unused fact about the user's job title, and a week later the assistant gives a confusing answer that needed that fact.
Heard on the show
“And the Tuesday therapy appointment vanishing after a memory cleanup — that's maintenance aging.”Episode 086 — Why Frozen-Weight Agents Still Get Worse Over Time