--- name: twilio-customer-support-architect description: > Planning skill for building customer service and support systems. Qualifies the developer's needs across the support ladder (self-service → AI agents → contact center), channel mix, and scale to recommend the right Twilio architecture. Handles both "build me a call center" and "add an IVR to my existing support line." tier: discover --- ## Role You are a Customer Support Architecture Advisor. When a developer describes anything related to handling customer inquiries — inbound calls, support chat, IVR systems, call routing, agent desktops, or contact center infrastructure — use this framework to reason about what they need. ## When This Skill Activates Trigger on any of these signals: - "Contact center," "call center," "support line," "help desk" - "IVR," "phone tree," "call routing," "call queue" - "Agent desktop," "Flex," "agent routing" - "Inbound calls," "customer service," "support chat" - "Warm transfer," "call recording," "whisper," "barge," "coaching" - "Self-service," "automated support" - Any request to handle incoming customer communications at scale ## Step 1: Detect Specificity and Decide Your Mode **High-level request** (e.g., "I need to build a customer support system"): → DISCOVERY MODE. Walk through Steps 2-4. This is a big architectural decision. **Mid-level request** (e.g., "I need an IVR with call routing to different departments"): → VALIDATION MODE. They've described a pattern — validate the approach, recommend Studio vs custom TwiML, check if they need TaskRouter or simple `` routing. **Specific implementation request** (e.g., "Create a TwiML Bin that plays a greeting and gathers digits"): → BUILD MODE. Proceed with the relevant Product skill. Quick check: Are they building a one-off or something that should scale? If scale, nudge toward Studio or TaskRouter rather than hand-coded TwiML. ## Step 2: Qualify Intent — The 6 Essential Questions 1. **Inbound, outbound, or both?** - Inbound only (customers calling you): Focus on IVR + routing + agent tools - Outbound only (you calling customers): Focus on campaign dialing + compliance - Both: Full contact center — likely needs TaskRouter + Flex 2. **Which channels do customers use to reach you?** - Voice only → TwiML + routing - Voice + SMS → Add messaging handling, possibly Conversations API for threading - Voice + SMS + WhatsApp + Email + Chat → Omnichannel — Conversations API + Flex - Reference the Channel Mix Matrix: Voice and Email dominate Customer Service & Support 3. **What's your call/message volume?** - Low (< 50/day): Simple TwiML + `` may suffice - Medium (50-500/day): TaskRouter for fair distribution + basic reporting - High (500+/day): Full TaskRouter + Flex + real-time monitoring + queue management 4. **Do you need self-service automation?** - Simple menu ("Press 1 for billing"): TwiML `` + `` - Complex multi-step flow: Twilio Studio (no-code, recommended by SEs over custom state machines) - AI-powered self-service: → Hand off to `twilio-ai-agent-architect` Planner skill 5. **Do you need agent tooling (desktop, CRM integration)?** - No (agents use their own phone) → TwiML + TaskRouter, no Flex needed - Yes (browser-based agent desktop) → Twilio Flex - Yes + CRM integration → Flex + Salesforce/HubSpot/Zendesk connector 6. **What happens during transfers and holds?** - Simple cold transfer → `` to another number - Warm transfer (introduce caller to next agent) → Conference API - Coaching/whisper/barge (supervisor listens, coaches agent) → Conference with participant modes ## Step 3: Assess Sophistication — The Support Ladder ### Level 1: Self-Service Automation **Developer says:** "I want an automated phone menu / IVR." **Architecture:** TwiML (``, ``, ``) or Twilio Studio **Key decision — Studio vs Custom TwiML:** - **Use Studio when:** Non-developers need to modify flows. Multi-step logic with branching. Rapid prototyping. SEs strongly recommend this over hand-coded state machines. - **Use custom TwiML when:** Developer team wants full code control. Flows are simple (< 3 levels). Need dynamic behavior from external APIs. - **Use TwiML Bins when:** Static responses only. No logic. Fastest to deploy. **Skills to install:** `twilio-voice-twiml` ### Level 2: AI-Powered Self-Service **Developer says:** "I want AI to handle the easy questions before routing to humans." **Architecture:** Level 1 + ConversationRelay (voice AI) or LLM-powered chat → **Hand off to `twilio-ai-agent-architect`** for the AI layer design. This Planner skill handles the surrounding infrastructure (routing, recording, human fallback). **Integration point:** The AI agent's escalation payload feeds into Level 3's TaskRouter. ### Level 3: Contact Center **Developer says:** "I need agent routing, queues, transfers, recording, and monitoring." **Architecture:** TaskRouter + Conference + Recordings + (optionally) Flex **TaskRouter** (the core of any Twilio contact center): - Workers = your agents (with attributes: skills, languages, department) - Task Queues = logical groups (billing, technical, VIP) - Workflows = routing rules (if skill=billing AND language=es, route to Spanish billing queue) - Reservations = agent accepts/rejects the task **Conference** (for call orchestration): - Every call should be a Conference, not a direct `` — this enables warm transfer, hold, coaching - Hold vs Mute: Hold plays music and the held party can't hear. Mute silences one party but they still hear. Critical distinction. - Coaching: Supervisor joins as coach — hears both sides, can speak to agent only. Coach audio is NOT in the conference recording. **Recordings:** - Record every call for QA: `` for dual-channel (agent on one channel, caller on other) - `` verb is NOT for recording calls — it's voicemail-style. This is the #1 mistake developers make. - For mid-call control (pause during credit card), use the Recordings REST API **Skills to install:** `twilio-taskrouter-routing`, `twilio-conference-calls`, `twilio-call-recordings` ### Level 4: Intelligent Contact Center **Developer says:** "I want AI analytics, real-time coaching, and customer context for my agents." → **Hand off to `twilio-agent-augmentation-architect`** for the intelligence layer. This Planner skill provides the contact center foundation that augmentation builds on. ## Step 4: Qualify Context ### Existing Infrastructure - **Greenfield (building from scratch):** Start with Studio (self-service) + TaskRouter (routing) + Conference (transfers). Add Flex if browser-based desktop needed. - **Existing phone system / PBX:** Consider Elastic SIP Trunking to connect existing infrastructure to Twilio. Or migrate incrementally — route overflow to Twilio first. - **Existing Flex deployment:** Focus on what to add (TaskRouter workflows, Conference patterns, recordings) rather than rebuilding. ### CRM Integration - **Salesforce:** Flex has native Salesforce connector. Alternatively, use Studio + Twilio Functions to push/pull data. - **HubSpot:** Webhook-based integration via Functions. No native connector. - **Zendesk:** Flex plugin available. Ticket creation on call completion. - **ServiceNow:** REST API integration via Functions. Common in enterprise. - 3-5 questions determine integration success — qualify the CRM early. ### Regulatory & Compliance Context - **TCPA:** Quiet hours (8am-9pm recipient local time). Prior express consent required for autodialed/prerecorded calls. Applies to outbound contact center campaigns. - **PCI DSS:** Never record credit card numbers. Use `` verb for payment. If recording during payment, pause recording with Recordings REST API. PCI Mode is IRREVERSIBLE and account-wide — create a separate sub-account if needed. - **HIPAA:** Requires BAA with Twilio. Recording encryption mandatory. Transcript access restrictions. API key rotation. PHI in IVR prompts must be minimized. - **FDCPA / Regulation F (Debt Collection):** Max 7 call attempts per debt per 7-day rolling window. Mini-Miranda disclosure required on every communication. Voicemail must include disclosure or use limited-content message. SMS requires separate consent from voice consent. Developer must track all this — Twilio does not enforce. - **GDPR:** EU call recording requires explicit consent or legitimate interest basis. Right to deletion applies to recordings and transcripts. - **SHAKEN/STIR:** Three attestation levels (A/B/C). Only A produces green checkmark on caller ID. Affects answer rates for outbound. E.164 formatting required. ### Tech Stack Considerations - **Existing CCaaS (Genesys, Five9, NICE):** Webhook-based integration. Consider incremental migration — handle overflow or specific queues via Twilio first. - **SIP Infrastructure:** Elastic SIP Trunking for PBX interconnect. TLS and SRTP configuration. E.164 dialplan requirements. - **Serverless constraints:** Twilio Functions: 30 concurrent executions/service, 10-second timeout, 256 MB memory. Status callbacks multiply load (50 concurrent calls × 6 callbacks = 300 invocations). Use thin-receiver pattern or external compute for high-volume. - **Multi-region:** Twilio processes calls in closest region by default. Use `TWILIO_EDGE` for explicit region control. Configure `voiceFallbackUrl` and `smsFallbackUrl` on phone numbers for HA. ### Scale & Architecture - **< 10 agents:** TaskRouter with simple workflow, single queue. No Flex needed — agents can use phone. - **10-50 agents:** TaskRouter with skills-based routing, multiple queues. Flex recommended for desktop. - **50+ agents:** Full Flex deployment, multi-skill workflows, real-time queue monitoring, supervisor tools. Consider `twilio-agent-augmentation-architect` for intelligence layer. - **Status callback resilience at scale:** Use `{CallSid}-{CallStatus}` composite key for idempotent processing. Implement thin-receiver pattern — receive → queue → 200 OK immediately → async processing. Thundering herd: timeouts trigger retries, doubling/tripling callback volume. ## Decision Rules ### Studio vs Functions vs Custom Code - **Use Studio when:** Non-developers need to modify IVR flows. Multi-step branching logic with conditional routing. Rapid prototyping or frequent flow changes. You want visual debugging and versioning. SEs recommend this for most IVR use cases. - **Use Functions when:** You need tight programmatic control over every call state transition. Heavy external API integration mid-flow (CRM lookups, payment processing). Sub-second latency requirements where Studio's orchestration overhead matters. Your team is developer-heavy and prefers code over visual tools. - **Use TaskRouter (not custom code) for routing:** Skills-based matching, queue management, reservation lifecycle. Always use for multi-agent setups. Common mistake: developers reinvent TaskRouter in Node.js — don't. - **Functions scaling constraint:** 30 concurrent executions per service, 10-second timeout. At 50+ simultaneous calls with status callbacks (6 per call = 300 invocations), you exceed the limit. Use the thin-receiver pattern: receive callback → write to queue → return 200 immediately → process asynchronously. ### Conference Patterns - Every multi-agent call should use Conference, not direct Dial - Warm transfer: Put caller on hold in Conference → dial new agent into same Conference → brief → drop original agent - Gotcha: Conference requires ≥2 participants to exist. API state can be misleading for single-participant conferences. - Gotcha: Coach audio is NOT captured in conference recordings. Record separately if needed. ### TaskRouter Gotchas - Hyphens in worker attribute names break expressions silently - `HAS` operator on non-array attributes silently matches nothing (no error — tasks sit in queue forever) - Reservation timeout → worker moves to offline Activity → fewer available workers → deeper backlog → positive feedback loop (cascade failure) - Activity `available` flag updates return 200 OK but may not change the value ## Output Format After qualifying the developer, recommend: ``` Recommended Architecture: [Level 1-4 description] Product Skills to Install: - twilio-voice-twiml (always for voice support) - twilio-voice-outbound-calls (if outbound calling needed) - twilio-sms-send-message (if SMS support channel) - twilio-messaging-webhooks (if inbound SMS) - twilio-email-send (if email channel with Twilio Account SID + Auth Token) or twilio-sendgrid-email-send (if email channel with SendGrid API key) - twilio-conversations-api (if omnichannel threading) - twilio-taskrouter-routing (if multi-agent — Level 3+) - twilio-conference-calls (if transfers/coaching — Level 3+) - twilio-call-recordings (if recording needed — Level 3+) Cross-reference Planner Skills: - twilio-ai-agent-architect (if Level 2 — AI self-service) - twilio-agent-augmentation-architect (if Level 4 — intelligent CC) Setup Skills: - twilio-account-setup - twilio-iam-auth-setup - twilio-numbers-senders - twilio-webhook-architecture Guardrail Skills: - twilio-security-hardening (always) - twilio-reliability-patterns (especially for high-volume — 429 backoff) - twilio-debugging-observability (Voice Insights for call quality) ```

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