retellai-core-workflow-a
Retell AI core workflow a — AI voice agent and phone call automation. Use when working with Retell AI for voice agents, phone calls, or telephony. Trigger with phrases like "retell core workflow a", "retellai-core-workflow-a", "voice agent".
Best use case
retellai-core-workflow-a is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Retell AI core workflow a — AI voice agent and phone call automation. Use when working with Retell AI for voice agents, phone calls, or telephony. Trigger with phrases like "retell core workflow a", "retellai-core-workflow-a", "voice agent".
Teams using retellai-core-workflow-a should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/retellai-core-workflow-a/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How retellai-core-workflow-a Compares
| Feature / Agent | retellai-core-workflow-a | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Retell AI core workflow a — AI voice agent and phone call automation. Use when working with Retell AI for voice agents, phone calls, or telephony. Trigger with phrases like "retell core workflow a", "retellai-core-workflow-a", "voice agent".
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
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SKILL.md Source
# Retell AI Core Workflow A
## Overview
Build and configure voice agents with custom prompts, function calling, and call flow logic.
## Prerequisites
- Completed `retellai-hello-world`
## Instructions
### Step 1: Agent with Function Calling
```typescript
const llm = await retell.llm.create({
model: 'gpt-4o',
general_prompt: `You are a booking assistant for Dr. Smith's office.
- Help callers book, reschedule, or cancel appointments
- Collect: name, phone, preferred date/time
- Confirm all details before booking`,
functions: [
{
name: 'book_appointment',
description: 'Book a new appointment',
parameters: {
type: 'object',
properties: {
patient_name: { type: 'string' },
phone: { type: 'string' },
date: { type: 'string', description: 'YYYY-MM-DD format' },
time: { type: 'string', description: 'HH:MM format' },
},
required: ['patient_name', 'phone', 'date', 'time'],
},
url: 'https://your-api.com/appointments',
speak_during_execution: true,
speak_after_execution: true,
},
],
});
```
### Step 2: Configure Voice and Behavior
```typescript
const agent = await retell.agent.create({
response_engine: { type: 'retell-llm', llm_id: llm.llm_id },
voice_id: '11labs-Rachel',
agent_name: 'Dr. Smith Booking Agent',
language: 'en-US',
opt_out_sensitive_data_storage: false,
end_call_after_silence_ms: 10000, // End call after 10s silence
max_call_duration_ms: 300000, // 5-minute max
enable_backchannel: true, // "mhm", "yeah" responses
boosted_keywords: ['appointment', 'schedule', 'Dr. Smith'],
});
```
### Step 3: Update Agent Configuration
```typescript
await retell.agent.update(agent.agent_id, {
voice_id: '11labs-Dorothy', // Change voice
end_call_after_silence_ms: 15000,
});
```
## Output
- Agent with custom LLM prompt and function calling
- Voice and behavior configuration
- Real-time function execution during calls
## Error Handling
| Error | Cause | Solution |
|-------|-------|----------|
| Function not triggering | Prompt doesn't guide to function | Include function use in prompt |
| Voice quality issues | Wrong voice selection | Test different voices |
| Call ending too early | Short silence timeout | Increase `end_call_after_silence_ms` |
## Resources
- [Retell AI Documentation](https://docs.retellai.com)
- [retell-sdk npm](https://www.npmjs.com/package/retell-sdk)
## Next Steps
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