guest@kroma:~$ preview --help
SAFE_
PREVIEW.
A constrained handset window for testing KROMA-hosted keypad experiences.
01 / INPUT CONTRACT
The phone bridge forwards press, hold and release events, handset screen geometry, LCD colours and active-screen state to compatible content.
02 / TRUST BOUNDARY
The native previewer accepts HTTPS content from kromaphone.com, the legacy kroma.jcalit.com service host and local development loopback addresses only. Arbitrary remote origins, embedded credentials and non-web URL schemes are rejected.