Some tools (herdr) don't use tmux's setenv -g to broadcast
SSH_AUTH_SOCK to new panes. Refresh the symlink when a real
socket is inherited, then always export the symlink path so
child shells in new panes can find it.
Split bash config into dedicated aliases and profile files. Extract
fish shell init from config.fish into composable conf.d fragments
(setup, environment, ssh-auth-sock). Remove the generic profile in
favor of the bash-specific one. Add a static SSH_AUTH_SOCK symlink
so tmux sessions always see the current socket regardless of which
shell spawned them.
gitadmin