Ports

Adapters

Demo adapters are the default. Hosted vendors plug in through env vars without code changes.

Port	Demo ($0)	First paid step	Env
Trips, ledger, tokens	Memory maps	Neon or Supabase Postgres	DATABASE_URL
Presence, buckets, pub/sub	Memory maps	Upstash Redis	REDIS_URL
Domain events	In-process bus	CloudAMQP	RABBITMQ_URL
Cards & Connect	Simulated PI	Stripe Connect	STRIPE_SECRET_KEY
Web login	Demo cookie	Supabase Auth	NEXT_PUBLIC_SUPABASE_URL
Uploads	Memory signed URL	R2/S3	UPLOAD_DRIVER=s3
ETA	Haversine	Mapbox, then Google, then OSRM	MAPBOX_ACCESS_TOKEN
Unlock	Simulated accept	IoT webhook	IOT_UNLOCK_WEBHOOK
Telematics	Simulated neighborhood ping	Bouncie / Samsara / Smartcar / …	TELEMATICS_PROVIDER
Mail	.data/mail.json + /admin/mail	Resend	RESEND_API_KEY
Voice/SMS	Simulated number	Twilio proxy	TWILIO_ACCOUNT_SID

getContainer() picks Redis and AMQP only when URLs exist. Everything else keeps working. That is the turnkey: you do not maintain a second “demo backend.”

backend/infra/container.ts

const cache = hasRedis() ? new RedisCacheStore(...) : new MemoryCacheStore();
const bus = hasRedis() || publisher ? new DurableEventBus(...) : new InMemoryEventBus();