Long-term memory

Find guides for enabling long-term memory, identifying players, resuming sessions, and troubleshooting recall in Unreal Engine.

Long-term memory (LTM) lets a Convai character retain facts about a specific player across separate sessions. In the Convai Unreal Engine plugin, memory works when the character has LTM enabled and the chatbot sends a stable EndUserID at connect time.

How long-term memory works Understand what LTM stores, how player identity scopes memory, and what your project must persist between sessions.

Long-term memory quick start Enable memory for one character, assign a stable player identity, and verify cross-session recall in Play In Editor.

Configure memory for a character Enable or verify the character LTM setting and reset the local conversation link when needed.

End-user identity Choose and assign a stable `EndUserID` before `StartSession` so memory stays scoped to the correct player.

Speaker ID management Create, list, and delete Speaker ID records through Blueprint nodes when your project uses the Speaker ID workflow.

LTM Blueprint reference Reference for runtime `Convai|LTM` Blueprint nodes, `FConvaiSpeakerInfo`, and the memory properties on both Convai components.

Long-term memory usage examples Blueprint-first patterns for returning learners, shared devices, account-backed identity, and fresh-start resets.

Troubleshoot long-term memory Diagnose disabled memory, identity mismatches, Speaker ID failures, and sessions that start fresh.

Next steps

Start with How long-term memory works for the mental model, then follow Long-term memory quick start to get memory running in your level.

How long-term memory worksLong-term memory quick start