ssh-add(1) on FreeBSD
The text 9c9fc2000978, as FreeBSD 15.1-RELEASE, FreeBSD 15.0-RELEASE, FreeBSD 14.5-RELEASE, FreeBSD 14.4-RELEASE, FreeBSD 14.3-RELEASE, FreeBSD 13.5-RELEASE shipped it.
adds private key identities to the OpenSSH authentication agent
Flags it lists
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