Nobody tells you that switching memory tools at month six is nothing like switching models.

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Summary

A reflection on the hidden costs of switching memory tools in AI agent systems after months of production, compared to the triviality of swapping models.

Switching models: change a config line. Done. Switching memory layers after six months of production: * Thousands of stored claims built up over hundreds of sessions * Contradiction logs that shaped current behavior * Trust scores that determine what wins retrieval today * Derived summaries that reference facts that no longer exist * User adaptations built around what the agent currently believes That's not portable. That's institutional memory baked into someone else's infrastructure that you can't inspect, can't export cleanly, and can't migrate without rebuilding behavior from scratch. The exit cost of a memory tool compounds every week you use it. Most teams pick on month-one ease and discover this at month six when switching is already expensive. Has anyone actually migrated a memory layer after real accumulation? What did that look like?
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