Turnkey Agent — Vercel x Google DeepMind Hackathon | March 21, 2026
Turnkey Agent is an AI property management agent that handles emergency maintenance end-to-end — from an angry guest's phone call to a plumber walking through the door — using voice calls, not chat. It triages issues against 5 years of property history, parallel-calls vendors for quotes, recommends the best option to the landlord, schedules the repair, and gives the plumber the door code when they arrive. Every interaction is a real phone call powered by Gemini.
Why it wins: Real phone calls to real phones. Multi-agent parallel orchestration visible in real-time. Solves a $2–5B market pain point. Uses the entire Gemini stack (Live Audio, Embeddings 2, Flash 3.1, TTS). Deployed on Vercel with durable workflows.
| Layer | Technology | Purpose |
|---|---|---|
| Voice (Real-time) | Gemini 2.5 Flash Native Audio (Live API) | All phone conversations — bidirectional, low-latency |
| Voice (Async) | Gemini 2.5 Flash TTS | Voice notes, notifications, summaries |
| Telephony | Twilio Voice + Media Streams | PSTN phone calls, audio streaming via WebSocket |
| Reasoning | Gemini 3.1 Flash | Quote comparison, vendor recommendation, decision logic |
| Embeddings | Gemini Embedding 2 | Maintenance history search, property knowledge retrieval |
| Database | Supabase (Postgres + pgvector) | Property data, maintenance logs, vendor info, access codes, embeddings |
| Auth | BetterAuth | Dashboard login (landlord/property manager) |
| Frontend | Next.js on Vercel | Real-time dashboard showing multi-agent activity |
| Orchestration | Vercel AI SDK 6 + Workflow DevKit | Durable agent workflows, parallel task execution |
| Scheduling | Google Calendar API | Repair scheduling |
| Bridge | FastAPI/Quart WebSocket proxy (or Pipecat) | Converts Twilio SIP/RTP to Gemini Live WebSocket |
┌─────────────────────────────────┐
│ VERCEL DASHBOARD (Next.js) │
│ ┌───────────────────────────┐ │
│ │ Real-time Agent Activity │ │
│ │ - Call status cards │ │
│ │ - Quote comparison │ │
│ │ - Timeline / audit log │ │
│ │ - Approval buttons │ │
│ └───────────┬───────────────┘ │
│ │ WebSocket/SSE │
│ ┌───────────▼───────────────┐ │
│ │ AI SDK 6 + Workflow DK │ │
│ │ (DurableAgent) │ │
│ │ - Orchestrator agent │ │
│ │ - Parallel call spawner │ │
│ └───────────┬───────────────┘ │
└──────────────┼───────────────────┘
│
┌────────────────────┼─────────────────────┐
│ │ │
┌─────────▼────────┐ ┌───────▼────────┐ ┌─────────▼────────┐
│ VOICE ENGINE │ │ REASONING │ │ KNOWLEDGE │
│ │ │ │ │ │
│ Twilio Voice │ │ Gemini 3.1 │ │ Supabase │
│ ↕ │ │ Flash │ │ + pgvector │
│ WebSocket Proxy │ │ │ │ + Embedding 2 │
│ ↕ │ │ - Compare │ │ │
│ Gemini Live API │ │ quotes │ │ - Properties │
│ (2.5 Flash │ │ - Recommend │ │ - Maint history │
│ Native Audio) │ │ vendor │ │ - Vendor codes │
│ │ │ - Assess │ │ - Call logs │
│ 4 phone lines: │ │ urgency │ │ - Photos │
│ - Guest │ │ │ │ - Embeddings │
│ - Plumber 1 │ └────────────────┘ │ │
│ - Plumber 2 │ └──────────────────┘
│ - Landlord │ │
└──────────────────┘ ┌───────▼────────┐
│ SCHEDULING │
│ Google Cal API│
└────────────────┘
See also: architecture-diagram.svg for the full visual diagram.
