m3ta-chiron
7601583928
The exported M3_SHELL_TO_NU marker leaked into programs started from
nu (zellij, zed, herdr), keeping their spawned terminals in bash.
Decide via /proc/$PPID/comm instead: interactive bash whose parent is
neither nu nor bash execs into nu; a deliberate 'bash' started from
nu/bash stays bash. Non-interactive bash (ssh command exec, Mosh app
bootstrap, see 765ae15) is still covered by the $- == *i* check.