> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dume.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Cross-Session Memory

> How Dume can look up and answer from a different past session, not just the one you're in.

Dume isn't limited to what's happened in the session you're currently in. From any session, you can ask about a different past one, and Dume looks it up in [History](/core-workspace/history), opens it, and answers from what's actually in it.

```
What did I decide in the session about the Acme deal?
Find the session where we discussed the Q3 launch and remind me what was next.
What did I ask you to do in yesterday's onboarding session?
```

## What happens

Give Dume whatever clue you have, a title, a rough topic, a project or person's name, and it matches that against your session History:

* **One clear match** — Dume opens it, reads it, and answers.
* **A few likely matches** — Dume asks which one you meant instead of guessing.
* **No confident match** — Dume says so rather than making something up, the same as it does when a connected tool has no data. See [When Dume asks you something back](/getting-started/chat-interface#when-dume-asks-you-something-back).

## Getting a better match

This isn't a search over every message you've ever sent, it matches on what's findable in History. A clear, specific session title makes this far more reliable than a generic one; rename a session from the three-dot menu as soon as it's clear what it's about. See [History](/core-workspace/history) for pin, rename, and delete.

<Tip>
  If Dume can't find what you're after, the fastest fix is opening the session yourself from History and pointing Dume at it directly: "Look at the session titled 'Acme renewal' and summarize what we agreed."
</Tip>