Files
TREK/shared
Maurice 2149fd5315 refactor(budget): the receipt split by line lives in shared so the server can split a receipt the way the cost editor does
calculateTicketShares in the cost editor now converts the hundredths of the
new shared splitTicketLines. Same arithmetic as before: a line nobody is
ticked for is carried by everyone on the receipt and the leftover hundredths
of a line go to the lowest user ids first.

Refs #2604
2026-10-12 16:39:07 +02:00
..
2026-06-16 22:22:45 +02:00
2026-06-16 22:22:45 +02:00
2026-08-27 13:22:39 +02:00

@trek/shared

Single source of truth for TREK's API contracts, expressed as Zod schemas and consumed by both the server (request validation + inferred DTO types) and the client (typed requests/responses).

This package is part of the incremental NestJS + React 19 migration (see the "Brownfield Rewrite" board). It is intentionally dormant until modules start importing it — adding it changes nothing for users.

Rules

  • One folder per domain: src/<domain>/<domain>.schema.ts (+ .spec.ts).
  • Domain-agnostic building blocks live in src/common/.
  • A route is only considered migrated once its contract lives here.
  • Schemas are the source of truth; server DTOs and client types are inferred from them (z.infer<typeof schema>), never hand-duplicated.

Consumption (dev)

Both apps resolve @trek/shared to this package's TypeScript source:

  • Server (tsx): via paths in server/tsconfig.json.
  • Client (vite): via resolve.alias in client/vite.config.ts (+ paths for the type-checker).

Production packaging (Docker / workspace wiring) is introduced in card F2, when the server first depends on this package at runtime. Until then prod builds are untouched.

Not yet here

The canonical error envelope is finalised in card F5 (it must match TREK's current Express error responses byte-for-byte), so it is deliberately not invented in F1.