first MVP

prisma/schema.prisma

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+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+// Looking for ways to speed up your queries, or scale easily with your serverless or edge functions?
+// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model Person {
+  id        String   @id @default(uuid())
+  name      String
+  company   String?
+  role      String?
+  email     String?
+  location  String?
+  sectors   String[] @default([])
+  interests String[] @default([])
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  // Relations (undirected connections modeled as two directed FKs)
+  connectionsA Connection[] @relation("ConnectionsA")
+  connectionsB Connection[] @relation("ConnectionsB")
+
+  @@index([name])
+}
+
+model Connection {
+  id                String   @id @default(uuid())
+  personAId         String
+  personBId         String
+  personA           Person   @relation("ConnectionsA", fields: [personAId], references: [id], onDelete: Cascade)
+  personB           Person   @relation("ConnectionsB", fields: [personBId], references: [id], onDelete: Cascade)
+  introducedByChain String[] @default([])
+  eventLabels       String[] @default([])
+  notes             String?
+  createdAt         DateTime @default(now())
+
+  @@index([personAId])
+  @@index([personBId])
+  // Uniqueness of undirected pair (A,B) and self-edge prevention enforced via SQL migration with
+  // a functional unique index on (LEAST(personAId, personBId), GREATEST(personAId, personBId))
+  // and a CHECK (personAId <> personBId).
+}