Signal

Text your agent on Signal. Your agent has a number of its own, linked from its phone, and it answers you and no one else.

Connect it

Give your agent a number of its own, such as a second or prepaid SIM, and link it from its phone.

lnk agent connect signal

Type the agent's number and yours, then scan the QR code from the agent's phone (Settings > Linked Devices > Link New Device). The first time, Link installs signal-cli for you.

To connect without prompts, as from a script:

LNK_SIGNAL_NUMBER=+15557654321 LNK_SIGNAL_OWNER=+15551234567 lnk agent connect signal

Disconnect

lnk agent disconnect signal

disconnect forgets Signal's tokens and restarts your agent if it runs. To finish, unlink it on the agent's phone (Settings > Linked Devices).

Troubleshooting

SymptomFix
"Signal isn't linked on ..."lnk agent connect signal, and scan the code.
connect signal says the phone is another numberScan from the agent's phone.