retellai-core-workflow-a

name	retellai-core-workflow-a
description	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".
allowed-tools	Read, Write, Edit, Bash(npm:*), Bash(curl:*), Grep
version	1.9.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","retellai","voice","telephony","ai-agents"]
compatibility	Designed for Claude Code, also compatible with Codex and OpenClaw

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

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,
      : ,
    },
  ],
});