FieldMemory

Your best technician's memory, in every technician's ear.

Voice-native field service memory for deskless workers. Built at the ElevenLabs × Sauna Hack Night (July 16, 2026).

ElevenLabs = mouth and ears. Sauna = brain and shared memory. FieldMemory = the voice front door.

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Screenshots

Live demo (voice + Team Memory feed)

Tap the mic, ask about a site, and watch structured visits appear in the Team Memory panel — parts, follow-ups, and access notes.

About page

Sauna × FieldMemory MCP (HQ side)

Sauna connected to FieldMemory as a custom MCP connector. Asking for the latest Hillsdale visit pulls live team memory — technician, equipment, prior visits — into the Sauna Space dashboard.

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Pitch

Sauna says: stop asking your AI for answers, start asking it for tools.
We say: stop typing into your tools, start talking to them.
FieldMemory is the first voice-native Sauna App — for the 80% of workers who can't use a keyboard on the job.

Problem: Field techs (HVAC, electrical, medical equipment) can't type on rooftops. Job history lives in their heads. Documentation never happens. Repeat truck rolls cost $150–$500 each.

Product:

1. Recall — arrive at a site, ask by voice, get full history / warranty / access notes
2. Capture — ramble a messy debrief; parts, follow-ups, and codes write into shared memory
3. Multiplayer — the next tech (or Sauna at HQ) asks what happened and hears what was just logged

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Architecture

Browser (Tech A / Tech B)
   │  ElevenLabs Conversational AI widget
   ▼
ElevenLabs Agent ──webhook tools──► Express relay (tunnel)
                                       │
                          ┌────────────┴────────────┐
                          ▼                         ▼
                     SQLite memory.db         Anthropic Claude
                     sites / equipment        briefing + debrief
                     / visits                 structuring
                          ▲
                          │
              Sauna Space ──MCP──► POST/GET /mcp

Layer	Choice
Voice	ElevenLabs Conversational AI + web widget
Relay	Node + Express
Memory	better-sqlite3 (memory.db)
LLM	Anthropic claude-sonnet-4-6
Sauna	Custom MCP connector (/mcp)
Frontend	Static HTML (Gumroad dark theme)

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Demo script (5 minutes)

Beat	Who	Say	Prove
1 Recall	Tech A	“I just pulled up to the Hillsdale Medical HVAC unit.”	Spoken briefing: prior visits, warranty, access code
2 Capture	Tech A	Debrief with FM-2250, line replacement, code 4482	New card appears in Team Memory
3 Multiplayer	Tech B or Sauna	“What do I need to know for Hillsdale tomorrow?”	Answer includes FM-2250 + 4482

Close: That knowledge used to leave in the truck. Now it compounds.

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Quick start

npm install
cp .env.example .env   # fill keys (see below)
node seed.js           # 2 sites, 3 visits (Hillsdale roof code starts at 7715)
node server.js         # http://localhost:3000

Environment

Variable	Required	Purpose
ANTHROPIC_API_KEY	Yes (for spoken briefings)	Claude synthesis + debrief JSON
ELEVENLABS_API_KEY	For agent create/update script	Dashboard tool wiring
ELEVENLABS_AGENT_ID	For widget	Embeds voice agent on /
SAUNA_API_BASE / SAUNA_API_KEY	Optional	Push write-through (Track A stretch)
PORT	No (default 3000)	HTTP port

Never commit .env. It is gitignored.

Tunnel + ElevenLabs tools

Expose localhost (ngrok or cloudflared), then point agent tools at it:

node create-agent.js https://<your-tunnel-host>

Creates/updates tools: site_briefing, log_debrief, ask_team_memory.

Sauna MCP

Register a custom MCP connector in Sauna pointing at:

https://<your-tunnel-host>/mcp

Tools exposed:

MCP tool	Role
get_site_briefing	Site history briefing (read)
search_team_memory	Answer from visits only (read)
log_visit	Store a debrief (write)

Supports classic SSE (GET /mcp + POST /messages) and Streamable HTTP (POST /mcp).

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API

Route	Purpose
POST /tools/site-briefing	Beat 1 — spoken site briefing
POST /tools/log-debrief	Beat 2 — structure + store debrief
POST /tools/ask-team-memory	Beat 3 — answer from shared memory
GET /feed	Live Team Memory JSON for the UI
GET /config	{ agentId } for the widget
GET /mcp / POST /messages	Sauna MCP (SSE)
POST /mcp	Sauna MCP (Streamable HTTP)
GET /	Demo UI
GET /about.html	About page

All tool endpoints return { "result": "<string for the agent to speak>" }.

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Repo layout

├── server.js           # Express routes + static
├── store.js            # All storage (SQLite; optional Sauna write-through)
├── tools.js            # Shared handlers (webhooks + MCP)
├── mcp.js              # MCP SSE + Streamable HTTP
├── claude.js           # Briefing + debrief extraction
├── db.js / seed.js     # Schema + demo seed
├── create-agent.js     # ElevenLabs agent + tools bootstrap
├── public/
│   ├── index.html      # Voice demo + Team Memory feed
│   └── about.html      # Pitch / product page
└── docs/screenshots/   # README images

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Commercial wedge

• Market: deskless workforce; field service management ~$5B+, double-digit growth
• Buyers: mechanical / HVAC / electrical contractors, 20–200 techs
• Price: ~$60–100 / tech / month
• ROI: one avoided repeat truck roll per tech per month
• Moat: every debrief compounds shared memory — switching cost grows daily
• Distribution: built as a Sauna surface → connectors + Spaces for free

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License

MIT — hackathon build. Ship it, fork it, put it on a rooftop.