Unclear How the interactive screen displays the notice is not settled.
What
A trusted device is a computer registered to your account as one you trust. Claude Code can enroll the machine on its own, outside of signing in. Before this release that finished with only a debug log line. Now it shows this notice: "This computer was enrolled as a trusted device for your account (you will also get an email). If you did not expect this, review your devices in claude.ai settings."
- In the interactive terminal interface, the notice appears as a high-priority notice for 30 seconds, and a warning message is also added to the conversation (
automaticEnrollmentNoticePendingmarks it as waiting to be shown). - In non-interactive runs, the notice is logged and written to stderr (the error output), but only when stderr is a terminal.
- Enrollments that happen as part of sign-in do not show it.
Enrollment, and so the notice, still sits behind the switch tengu_sessions_elevated_auth_enforcement, which falls back to off, and requires your organisation to have require_trusted_devices enabled or allowed. The flag server returned that switch as on for this site's account and for an anonymous baseline account; no reading has been taken under this release yet.
Why
You now learn when a device credential has been issued for your account, and get a pointer to where you can check for one you did not expect.
How the interactive screen displays the notice is not settled.