julian
bfe64032d8
Turborepo (pnpm workspaces) with all dependencies pinned to latest mutually-compatible versions: turbo 2.9, TypeScript 6, Fastify 5, React 19, Vite 8, better-sqlite3 12 + Drizzle ORM 0.45. Layout: - apps/server Fastify backend (local JWT auth + role guard, /health) - apps/web React 19 + Vite 8 operator SPA - packages/db Drizzle schema on SQLite/WAL; append-only events + users - packages/devices reader/printer/relay adapter interfaces (intent-only relay) - packages/shared shared domain types Architecture constraints from the design wiki are encoded in the scaffold: append-only hash-chained + signed event log, device-agnostic adapters, "a barrier is not a door" (relay expresses intent only), fully-local offline-first auth. wiki/ is an LLM-maintained Obsidian knowledge base (28 pages) ingested from the architecture & design notes, with its own maintenance schema. Verified: pnpm install, full turbo build (5/5), server boots and serves /health, drizzle-kit generates the initial migration.
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type, tags, sources, updated
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| concept |
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2026-06-14 |
Device-Adapter Pattern
How the system stays device-agnostic: business logic talks only to interfaces, never to a device SDK. Each physical device is an adapter implementing one interface; swapping hardware means writing a new adapter and nothing else changes. Implemented as isolated fastify plugins emitting onto a shared internal event bus. (See parking-system-architecture §5.)
interface CardReaderDevice {
connect(): Promise<void>
onCardRead(cb: (cardNumber: string, door: number) => void): void
disconnect(): Promise<void>
}
interface PrinterDevice {
printTicket(data: TicketData): Promise<void>
checkStatus(): Promise<'ready' | 'offline' | 'paper_out'>
}
interface RelayDevice {
pulseOpen(doorId: number): Promise<void> // intent only — see safety note
getDoorStatus(doorId: number): Promise<'open' | 'closed'>
}
Note the RelayDevice expresses intent only — see the barrier-not-a-door safety
principle. The choice of which adapter to trust is the trust-boundary decision.