Tags: VOICE AI · AGENTIC AUTOMATION · VAPI + GEMINI + N8N

One Line: Replacing the missed call and manual booking cycle with a 90-second AI voice qualification and booking system — built entirely on free and low-cost infrastructure.


What's Inside

# Section What It Covers
01 Problem Framing The pain, the user, the gap in the market
02 Solution Overview What the system does and how it's layered
03 Qualification Engine The 6-factor 100-point scoring model
04 Backend Architecture Both n8n workflows explained node by node
05 Vapi Configuration Aria assistant settings, tools, system prompt
06 Cal.com Configuration Booking event setup and parameters
07 Supabase Schema Full aria_bookings table structure
08 Frontend Architecture Three-page structure and UI logic
09 Live Links & Resources Public URLs and access points
10 Metrics Framework AARRR, HEART, AI performance, North Star
11 Product Roadmap 3-phase plan from MVP to commercialisation
12 Process & Decision Log Every architectural decision with reasoning and tradeoffs

Impact at a Glance

< 3 seconds < 90 seconds 0
Time to answer every inbound call From call to confirmed booking Human agents required

01 · Problem Framing

02 · Solution Overview

03 · Qualification Engine

04 · Backend Architecture

05 · Vapi Configuration

[06 · Cal.com Configuration](https://app.notion.com/p/06-Cal-com-Configuration-cec657850d578247a99d014ed51a1d2c)

07 · Supabase Schema

08 · Frontend Architecture

09 · Live Links & Resources

10 · Metrics Framework

11 · Product Roadmap

12 · Process & Decision Log