A session is one conversation with the agent in a project folder. AIUS keeps every session on your computer, so you can pick up where you stopped. Start AIUS in the project folder: 
cd ~/projects/term-deposit-campaign
aius
When the folder has earlier sessions, AIUS asks whether to start a new one or continue where you stopped:
The Start a session dialog in the AIUS terminal: New session, and under Previous sessions, Term-deposit propensity model and campaign report, marked Last session
Sessions kept in ~/.local/share/aius appear here too, in the folder they were started in (Folders and projects). Type /sessions to see the sessions for this folder, newest first. Search by title, open one to continue it, or use the shortcuts shown at the bottom of the list to pin, rename or delete a session.
The Sessions list in the AIUS terminal, showing the session Term-deposit propensity model and campaign report under its date, with shortcuts to pin, delete and rename
From the command line:
CommandDoes
aius --continueContinue the most recent session in this folder
aius --session <id>Continue a specific session
aius --continue --forkBranch the latest session into a new one
aius export <id>Write a session to JSON
Sessions stay private. The agent publishes a session to the web platform only if you ask it to and approve the publication.

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Useful commands in a session

Type / to list every command. The ones you will use most:
CommandDoes
/modelsChoose the model (Models)
/organisationChoose whose budget pays for model requests
/sessionsOpen another session
/projectsLink this folder to an AIUS Light project (Folders and projects)
/syncSync this folder with its AIUS Light project
/sharePublish this session to a project and get a link (Sharing)
/statusShow the connection to AIUS Light
/logoutSign this terminal out
Esc interrupts the agent while it works; Ctrl+P opens the command palette. Click a web address in a reply, such as the link to a published report, to open it in your browser. AIUS starts in dark mode. To change it, press Ctrl+P and choose Switch to light mode; AIUS remembers your choice. The screenshots in these docs use light mode.