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How to Implement Long-Term Memory for AI Companions: Pinning, Compaction, and Lessons from Mem0 and Letta

A user tells their AI companion on Monday that they are allergic to peanuts. On Thursday they ask for a snack idea. The model suggests peanut butter cookies. Nothing crashed. The fact was stored somewhere. It just was not in front of the model when it mattered. That is the core problem of long-term…

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  1. 2026-11-03 04:35 · DEV Community — AI
    How to Implement Long-Term Memory for AI Companions: Pinning, Compaction, and Lessons from Mem0 and Letta

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