twilio-communications

# Twilio Communications Build communication features with Twilio: SMS messaging, voice calls, WhatsApp Business API, and user verification (2FA). Covers the full spectrum from simple notifications to complex IVR systems and multi-channel authentication. Critical focus on compliance, rate limits, and error handling. ## Patterns ### SMS Sending Pattern Basic pattern for sending SMS messages with Twilio. Handles the fundamentals: phone number formatting, message delivery, and delivery status callbacks. Key considerations: - Phone numbers must be in E.164 format (+1234567890) - Default rate limit: 80 messages per second (MPS) - Messages over 160 characters are split (and cost more) - Carrier filtering can block messages (especially to US numbers) **When to use**: Sending notifications to users,Transactional messages (order confirmations, shipping),Alerts and reminders from twilio.rest import Client from twilio.base.exceptions import TwilioRestException import os import re class TwilioSMS: """ SMS sending with proper error handling and validation. """ def __init__(self): self.client = Client( os.environ["TWILIO_ACCOUNT_SID"], os.environ["TWILIO_AUTH_TOKEN"] ) self.from_number = os.environ["TWILIO_PHONE_NUMBER"] def validate_e164(self, phone: str) -> bool: """Validate phone number is in E.164 format.""" pattern = r'^\+[1-9]\d{1,14}$' return bool(re.match(pattern, phone)) def s...