TREK's four channels (in-app, email, webhook, ntfy) were a closed set: notificationService.send() dispatched with four copy-pasted `if` blocks and no provider abstraction, so a fifth channel meant editing eight files by hand. A plugin could produce a notification via ctx.notify.send(), but never deliver one. A plugin now registers a channel with `hooks.notificationChannel` + `hook:notification-channel` on a plain `type: 'integration'` — not a new manifest type, so the TREK-Plugins registry schema and both its CI gates are untouched. Core refactor - New channel registry (services/notifications/): email/webhook/ntfy become ExternalChannel providers wrapping the EXISTING send functions — no delivery logic is rewritten, only relocated. In-app deliberately stays out: it writes typed rows with scope/target/callbacks, not a rendered title+body, the same line shared/ already draws with i18n/externalNotifications. - The event text is now rendered once per recipient instead of once per channel. - The channel set is open: NotifChannel becomes a string, the matrix is registry-derived, and the UI columns are server-driven. The DB column was already bare TEXT and the Zod contract already a string record — only the TypeScript and the two UIs were ever closed. The hook runs USERLESS. Every other hook is user-initiated, so actingUserId falls out of the request; a notification is host-initiated for an ARBITRARY recipient, so ctx.settings.get() would return undefined. The host resolves the recipient's decrypted scope:'user' settings itself and passes them as an argument. That is what lets a channel plugin be handed someone's push token WITHOUT being handed the right to read their trips as them. Enabling the plugin is the opt-in: a plugin channel is not gated on the admin's `notification_channels` list. A built-in always exists in code and needs an explicit switch; a plugin channel only exists because an admin enabled that plugin. (Nothing could write a `plugin:` id into that CSV anyway, and the admin toggle rebuilt it from three booleans, silently dropping anything else — so requiring a second opt-in meant the channel could never be turned on at all.) Also fixed, found while building this: - Plugin settings keys were unvalidated, so a field named `__proto__` or `constructor` resolved off Object.prototype: a REQUIRED field with such a name reported as configured for every user who had configured nothing — enough, for a channel, to be dispatched to everyone with no credentials. Keys are now constrained at install and the config blob is parsed null-prototype, so it is impossible even for an already-installed plugin. - A `select` field's options were cast straight through, so the obvious `["1","5"]` form rendered every dropdown entry BLANK (the client reads value/label). Now coerced, and malformed options are rejected. Also adds: operator-supplied egress hosts (a plugin talking to a self-hosted service can't name the operator's host at publish time, so an admin adds it post-install and the runtime re-spawns the child with the widened allow-list — only for a plugin that DECLARED operatorEgress, and only an admin, never a user); settings-page actions (a "Test connection" button, user-initiated so ctx.settings.get() returns the clicking user's own value); and a Gotify-shaped notification-channel template in the SDK. Verified end to end against a real Gotify container, not just in tests.
@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.