Phone A
family A · member
Phone B
family B · member
Phone C
family A · another
Twilio
one shared sender number
→ /whatsapp/inbound
sudo-api
1. verify X-Twilio-Signature
2. look up sender phone
in family_members
3. forward to owning account
POST :8651/inbound
family_members
phone → user_id
hermes (family A)
twilio_whatsapp :8651
hermes (family B)
twilio_whatsapp :8651
lookup
reply via Twilio Messages REST