Choose the right Twilio number type and sender BEFORE building. Covers phone numbers (local, toll-free, short code, mobile), alphanumeric sender IDs, WhatsApp senders, RCS agents, international availability, and regulatory bundles. Each number type has its own compliance program — choosing wrong means rebuilding. Use this skill first.
Install
npx skills add twilio/ai --skill twilio-numbers-sendersnpx skills add twilio/ai --skill twilio-numbers-senders -a claude-code -gnpx skills add twilio/ai --skill twilio-numbers-senders -a codex -ggemini skills install https://github.com/twilio/ai.git --path skills/twilio/twilio-numbers-sendersgh skill install twilio/ai twilio-numbers-sendersgit clone --depth 1 https://github.com/twilio/ai /tmp/twilio__ai
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/twilio__ai/skills/twilio/twilio-numbers-senders ~/.claude/skills/twilio-numbers-senders # Claude Code
cp -R /tmp/twilio__ai/skills/twilio/twilio-numbers-senders ~/.agents/skills/twilio-numbers-senders # Codex, Cursor, Gemini CLI, Copilot, OpenCode