The plugin runs `gpgconf --list-options gpg-agent` on every shell start
to learn whether `enable-ssh-support` is set. On macOS with GnuPG 2.5.24
that one command takes about 600 ms.
The `ssh-support` style lets the user state the answer instead. With
`no` the plugin sets `GPG_TTY` and stops. That also skips the preexec
hook, which runs `gpg-connect-agent updatestartuptty` before every
command and is only needed for ssh support. With `yes` the plugin sets
`SSH_AUTH_SOCK` without asking.
Left unset, the plugin detects as before, so existing setups do not
change.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>