@blackevin/core

Blackevin's domain: channel matching, fan-out, presence, auth, and the webhook delivery pipeline — plus the ports it reaches the world through.

No I/O. Every external dependency is an interface (ports.ts, the *-store.ts files) with an in-memory implementation here; apps/realtime supplies the Postgres, AMQP and AWS ones.

import { MemoryDeliveryStore, renderPayload, signWebhook } from "@blackevin/core";

That split is what lets the domain be tested without Docker — and the memory implementations are the reference behaviour, not test doubles. See CLAUDE.md.