The vias already made the day follow the road; nothing said which road. After a reload the badge could only say "shaped by hand", and re-fitting after the stops changed meant finding the track again by eye. One row per day, written in the same transaction as the chain it describes: a day claiming to follow a road whose vias never landed would be worse than a day claiming nothing. Three states rather than two, which is why the field is an object and not an id — absent leaves whatever the day followed alone, null says it follows nothing, an object records the road it now takes. A bare nullable id could not tell "do not touch this" apart from "forget it", and a hand-dragged via on the same day must not wipe the label. The foreign key is the point: delete the imported track and the label cascades with it, so no day is left claiming to follow a line nobody can see. The vias stay, because they are the drive. Both write paths check that the place is a track of this trip before it becomes a label — permission alone would let another trip's place id, or an ordinary place, become a name that can never be drawn. Also clears three reliability findings the scanner raised on this branch: two default sorts given an explicit comparator, and a trailing-slash regex the scanner is right to call backtracking, walked instead.
@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): viapathsinserver/tsconfig.json. - Client (
vite): viaresolve.aliasinclient/vite.config.ts(+pathsfor 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.