{
  "id": "stack-profile:realtime-websocket-server",
  "_kind": "StackProfile",
  "_file": "domain/stack-profiles/deep-stacks-3.yaml",
  "_cluster": "domain",
  "attributes": {
    "displayName": "Real-Time WebSocket Server Stack (Node.js, Socket.io, Redis, PostgreSQL, TypeScript)",
    "description": "A dedicated real-time server for pushing live updates to connected\nclients — suitable for collaborative editing, live dashboards, gaming\nlobbies, and notification systems. Socket.io provides the transport\nlayer with automatic fallback from WebSocket to long-polling and\nbuilt-in room/namespace management. Redis Adapter enables horizontal\nscaling by syncing events across multiple Socket.io instances via\npub/sub. PostgreSQL stores persistent state (user sessions, message\nhistory) while Redis handles ephemeral real-time data (presence,\ntyping indicators). Pino provides structured JSON logging for\ndebugging connection lifecycle events. The key tradeoff is statefulness —\nWebSocket servers hold long-lived connections, complicating zero-downtime\ndeploys and requiring sticky sessions or Redis-backed session migration.\n",
    "composes": [
      "language:typescript",
      "library:socket-io",
      "library:ioredis",
      "library:prisma",
      "library:pino",
      "tool:docker"
    ]
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