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

# Conversations and history

> How ModelHub saves, lists and reopens your conversations, why reopened chats show placeholders, and what the sidebar can and cannot do.

Every exchange you have in ModelHub is saved to your history once the answer finishes. The sidebar lists your recent conversations so you can pick up where you left off.

## Starting a new chat

Click **New chat** at the top of the sidebar. The conversation area clears and the home screen returns. If an answer was still streaming, it keeps running on the server and is saved to history, but it stops appearing on screen.

A conversation gets its ID when its first answer finishes. Until then it does not appear in the sidebar.

## The history list

Below the navigation, the sidebar lists your conversations for the **current project**, newest first, grouped by when they were last active:

| Group | Contains |
| - | - |
| **Today** | Conversations active since midnight (your local time) |
| **Yesterday** | The day before |
| **Previous 7 days** | Two to seven days ago |
| **Older** | Everything earlier |

* The list shows your **40 most recent** conversations in the project.
* The conversation you are viewing is highlighted.
* Long titles are cut off; hover a title to see it in full.
* With no history yet, the list says **No conversations yet**.
* The list refreshes automatically after each answer finishes.

### Titles

A conversation is named after its first message. ModelHub asks a small model for a 2 to 5 word title in title case, written from the **masked** version of your first message, so the title never contains the personal data that was removed. If that model is unavailable, the title is the first line of your first message, cut to 48 characters with an ellipsis. An empty first line becomes "New chat".

## Reopening a conversation

Click a conversation in the sidebar. ModelHub loads it and shows a short loading skeleton while it does. You can then continue it as normal.

Reopened conversations differ from live ones in two ways:

1. **Personal details show as placeholders.** ModelHub never saves the real values it masked. A banner at the top says "Reopened from history — personal details were removed before saving and show as placeholders." This is the privacy design, not a display bug.
2. **The routing signal bars are empty.** Each answer's report card still shows its cost, verdict, privacy counts and token usage, but the per-signal breakdown under **Details** is only kept for live answers.

If you attached documents to a turn, the masked text of those documents was saved with that turn and is shown when you reopen it.

### Links and tabs

The address bar carries the open conversation as `?c=` followed by its ID, so you can bookmark or reload a conversation. ModelHub also remembers the open conversation for the current browser tab; if you navigate to **AI Usage** and back, you return to it.

Opening a conversation link that belongs to a different project, or that no longer exists, starts a fresh chat instead.

## Who can see your conversations

* **Only you** can list or reopen your conversations. The history is filtered to your own account on the server, so changing a URL cannot show you a colleague's chats.
* Your organization's administrators do **not** get a transcript viewer. They see aggregate usage and, on the organization-wide usage dashboard, the types and values of personal data that were removed from messages. See [Privacy screening](/modelhub/chat/privacy-screening#what-is-stored-and-who-sees-it).
* If end-to-end encryption is on, the text of new conversations is encrypted to you and your organization's super admins. See [Settings and profile](/modelhub/settings#end-to-end-encrypted-history).

## Projects and organizations

History is kept per project. Switching project or organization in the header gives you that project's history and a fresh chat. The model choice and the Optimise switch reset when you switch.

## What is not available yet

ModelHub does not currently offer:

* renaming a conversation,
* deleting a conversation,
* searching your history,
* regenerating or editing a previous message,
* sharing or exporting a conversation.

## Length limit

A conversation holds at most 20 exchanges in the current build. After that, start a new chat. See [The chat screen](/modelhub/chat/overview#sending-a-message).


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