@nek@hear-me.social
#PamDuress [1] is a small #LGPL package, looks serious and well-written, developed since 2021, though should be checked by people with infosec experience. Fork for #phosh [2]. Up to the user to write or choose "duress" scripts - not necessarily deleting anything - could be emailing an alert or audio/photo files to a trusted address.
Should be usable on any GNU/Linux desktop/laptop/phone for people whose threat model needs this.
[1] https://github.com/nuvious/pam-duress
[2] https://github.com/Sirr-OS/phosh-pam-duress