twilio-sms

Purpose

Enable OpenClaw to implement and operate Twilio Programmable Messaging (SMS/MMS) in production:

Send SMS/MMS reliably (Messaging Services, geo-matching, sticky sender, media constraints).
Receive inbound messages via webhooks and respond with TwiML.
Track delivery lifecycle via status callbacks (queued/sent/delivered/undelivered/failed).
Implement opt-out/STOP compliance and keyword workflows.
Operate A2P 10DLC (US long code) and toll-free verification constraints.
Debug and harden: signature validation, retries, idempotency, rate limits, carrier errors.

This skill is for engineers building messaging pipelines, customer notifications, 2-way support, and compliance-sensitive messaging.