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.
32 lines
1.2 KiB
Markdown
32 lines
1.2 KiB
Markdown
---
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type: concept
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tags: [parking, constraint, foundational]
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sources: [parking-system-architecture]
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updated: 2026-06-14
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---
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# Offline-First
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One of the **two foundational forces** shaping the whole system (the other is the
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[[threat-model]]). (See [[parking-system-architecture]] §1.)
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A park may have **no internet, intermittent connectivity, or be fully air-gapped**. **Nothing
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in the core operation may depend on a network being present.**
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## What it forces
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- **Local auth** — no external identity provider; hence [[local-jwt-auth]] and the rejection of
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[[logto-zitadel-oidc]].
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- **Local database** — [[sqlite]] on-site; remote PostgreSQL is a *deferred*, optional sync
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target, never a runtime dependency.
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- **Autonomous device decisions** where possible — [[wiegand]]-into-controller lets the
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[[uhppote-controller]] decide even if the host is down; [[lpr-camera]] uses edge AI so
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recognition runs with no internet.
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## What it does NOT mean
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Offline-first does **not** mean "no [[reconciliation]]." It means **deferred, intermittent**
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reconciliation — a manager's weekly USB stick, a daily phone hotspot, a monthly export. Only
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design for "never, by anyone" if that's genuinely true (see [[reconciliation]] for the
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network-free fallback controls).
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