ssh-add(1) on macOS
The text 0bf7a10d005e, as macOS 10.12.1, macOS 10.12, OS X 10.11.6, OS X 10.11.5, OS X 10.11.4, OS X 10.11.3, OS X 10.11.2, OS X 10.11.1, OS X 10.11 shipped it.
adds private key identities to the authentication agent
Flags it lists
-
-A -
-D -
-E -
-K -
-L -
-X -
-c -
-d -
-e -
-k -
-l -
-s -
-t -
-x