Backend overview

backend/
├── apps/
│   ├── core-api/            Express app, modules, workers, AI helpers
│   │   └── src/
│   │       ├── server.ts        process entry, builds AppContext, starts workers
│   │       ├── app.ts           Express app factory (createApp)
│   │       ├── config.ts        Zod env schema (loadEnv)
│   │       ├── context.ts       AppContext type
│   │       ├── health-checks.ts readiness checks
│   │       ├── http/respond.ts  ok, created, noContent
│   │       ├── middleware/      auth, lanes, roles, rate limits
│   │       ├── modules/         one folder per domain, plus index.ts (router registry)
│   │       ├── workers/         BullMQ workers and repeatable schedulers
│   │       ├── lib/             push, time zones, phone, team invite mail
│   │       ├── ai/              OpenAI helpers (nutrition, forms, recipes, programs)
│   │       ├── storage/         R2 client, HEIC conversion
│   │       ├── integrations/    third-party clients (ascendapi)
│   │       └── scripts/         one-off imports, backfills, smoke scripts
│   └── mcp-server/          stdio MCP binary
└── packages/
    ├── config, errors, logger, observability, queue, security,
    │   smartsend, types, db, mcp-tools          (@perform/* scope)
    └── api, auth, database, i18n, logs, mail,
        notifications, payments, storage, utils  (@repo/* scope)

{ "ok": true, "data": {}, "requestId": "01J..." }

{ "ok": false, "code": "NOT_FOUND", "message": "client not found", "requestId": "01J..." }