Real-time goal-oriented voice calling agent. Use when you need to make phone calls with a specific objective: place orders, make reservations, customer service, encouragement calls, or any conversational goal. Haiku runs the call in real-time with your voice (ElevenLabs), transcribes responses (Groq Whisper), adapts intelligently to conversation flow, handles silence/holds, and sends you an SMS summary. No scripts, pure real-time reasoning.
Scanned 9/7/2026
Install to Claude Code
npx -y skills add modbender/skill-library-mcp --skill universal-voice-agent --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: universal-voice-agent
description: Real-time goal-oriented voice calling agent. Use when you need to make phone calls with a specific objective: place orders, make reservations, customer service, encouragement calls, or any conversational goal. Haiku runs the call in real-time with your voice (ElevenLabs), transcribes responses (Groq Whisper), adapts intelligently to conversation flow, handles silence/holds, and sends you an SMS summary. No scripts, pure real-time reasoning.
---
# Universal Voice Agent
Make phone calls to achieve any goal. Haiku converses naturally, adapts in real-time, and handles the entire flow autonomously.
## Quick Start
### Make a Call
```bash
universal-voice-agent call \
--goal "Order 2 large pepperonis for pickup at 6pm" \
--phone "+1-555-123-4567" \
--notify-to "+1-555-730-8926"
```
Haiku:
1. Calls the number via Twilio
2. Listens to responses (Groq Whisper transcription)
3. Thinks about next move toward goal (Claude Haiku real-time reasoning)
4. Speaks in your voice (ElevenLabs TTS)
5. Repeats until goal achieved or timeout
6. Sends SMS summary to you
### Examples
**Ordering:**
```bash
universal-voice-agent call \
--goal "Order 2 large pepperonis for pickup at 6pm" \
--phone "+1-555-123-4567"
```
**Customer Service:**
```bash
universal-voice-agent call \
--goal "Find out the cancellation policy and confirm my appointment" \
--phone "+1-555-987-6543"
```
**Encouragement:**
```bash
universal-voice-agent call \
--goal "Call John and encourage him about his recent wins" \
--phone "+1-555-555-5555"
```
**Support:**
```bash
universal-voice-agent call \
--goal "Get a refund for order #12345" \
--phone "+1-800-123-4567"
```
## How It Works
### Real-Time Voice Loop
```
Goal: "Order 2 large pepperonis"
Phone: 555-123-4567
[DIAL]
↓
[LISTEN] (Groq Whisper) → "Hi, Mario's Pizza!"
↓
[THINK] (Haiku) → "They answered, now I'll state my order"
↓
[SPEAK] (ElevenLabs) → "Hi! I'd like to order 2 large pepperonis..."
↓
[LISTEN] (Groq Whisper) → "Sure, what else?"
↓
[THINK] (Haiku) → "They're ready. I should give toppings and details."
↓
[SPEAK] (ElevenLabs) → "No onions, and pickup at 6pm"
↓
[LISTEN] (Groq Whisper) → "$35, see you at 6."
↓
[THINK] (Haiku) → "Goal achieved! Order confirmed."
↓
[SEND SMS] → "✅ Order placed: 2 large pepperoni, pickup 6pm, $35"
↓
[HANGUP]
```
### Key Features
**Real-time Reasoning:**
- Haiku gets full conversation history
- Decides next response based on context, not scripts
- Adapts to unexpected responses naturally
**Silence Handling:**
- Detects when other party goes silent (on hold, put down phone, etc)
- After 5 seconds of silence: waits
- After 10 seconds: asks "Hello? Are you still there?"
- After 5 minutes: hangs up intelligently
**Natural Pacing:**
- Response latency <2 seconds (Haiku is fast)
- Speaks at human pace (ElevenLabs)
- Pauses for listening naturally
**Smart Timeout:**
- Conversation timeout: 20 minutes max
- Hold timeout: 5 minutes max
- Asks "Is anyone there?" before giving up
**SMS Summary:**
- After call ends, sends you a text with:
- Status (✅ ✅ with issues, ❌ failed)
- Brief recap of what happened
- Key confirmations/details
- Call duration
## Configuration
### Goal Definition
Any natural language phrase:
- "Order 2 large pepperonis for pickup at 6pm"
- "Find out the cancellation policy"
- "Call John and encourage him"
- "Get a refund for order #12345"
Haiku interprets the goal and adapts the conversation to achieve it.
### Phone Number
E.164 format: `+1-555-123-4567` or just `555-123-4567`
### Optional Context
```bash
universal-voice-agent call \
--goal "Order 2 large pepperonis" \
--phone "555-123-4567" \
--context "Restaurant: Mario's Pizza, Budget: $40, Dietary: no onions" \
--notify-to "555-730-8926"
```
## Scripts
- **agent.js** - Main orchestrator, Twilio loop, SMS summary
- **transcriber.js** - Groq Whisper transcription pipeline
- **thinker.js** - Haiku reasoning engine
- **speaker.js** - ElevenLabs TTS output
- **silence-handler.js** - Detect holds, silence, timeout
## References
- **ARCHITECTURE.md** - Real-time voice loop design
- **LATENCY.md** - Optimization for sub-2s response times
## Credentials Required
- **Twilio**: Account SID, Auth Token, phone number
- **ElevenLabs**: API key + your voice ID
- **Groq**: API key for Whisper transcription
- **Claude API** or **Clawdbot Gateway**: For Haiku reasoning
Store in environment or TOOLS.md.
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