What happened?

Starting pi --no-session creates an ephemeral session as expected. But typing /new from inside that session silently creates a persisted session — a .jsonl file appears in ~/.pi/agent/sessions/.

Steps to reproduce

1. Run pi --no-session
2. Type /new
3. Check ~/.pi/agent/sessions/ — a new session file was created

Expected behavior

/new should either inherit the ephemeral mode of the current session, or at least warn that it's creating
a persisted session.

Version

0.75.5