Just updated to the newest version, which seems to change quite dramatically how gpg-agent works. I can no longer figure out how to limit a gpg-agent to the cur

Just updated to the newest version, which seems to change quite dramatically how gpg-agent works. I can no longer figure out how to limit a gpg-agent to the current shell (the old version relied on environment variables which were easy to keep local). It bothers me that now, if I do anything with gpg, any other program on the computer can just decrypt information at will. Any solutions for this?