Phase 1 prototype scaffold: Bun /health backend + SwiftUI mock glass HUD

Commit b2e6721 (2026-05-28) — 27 files, +1744 −2. This is the first commit with real code. It's a thin end-to-end skeleton, deliberately scoped to "is the loop alive?" rather than any feature.

Backend — Bun, one route

backend/src/index.ts runs Bun.serve with a single route:

• GET /health → { status: "ok", service: "smart-glass-backend", timestamp }
• Everything else → 404 Not Found
• Port from process.env.PORT ?? 3001

package.json scripts: dev = bun --watch src/index.ts, start = bun src/index.ts. Created via bun init (Bun 1.3.14). backend/.env.example scaffolds OPENAI_API_KEY, ANTHROPIC_API_KEY, PORT — but no code reads them yet, and no OpenAI/Anthropic SDK is installed.

iOS — SwiftUI health poller + mock HUD

SmartGlassApp.swift (@main) → ContentView. ContentView calls fetchHealth() in a .task: an async URLSession GET to http://localhost:3001/health, decoded into HealthResponse. On success it shows the uppercased status; on failure, OFFLINE.

GlassDisplayView is a 280×280 mock "glass display" overlay — a green wifi SF Symbol when the backend is reachable, red wifi.slash when not, monospaced text. So the whole app today is: is the backend up? render that as a glasses-style HUD.

Project is generated with XcodeGen (ios-app/project.yml): bundle com.smartglass.app, iOS 17.0 deployment, Swift 6.0, SWIFT_STRICT_CONCURRENCY: complete.

Prompts & docs (drafts)

prompts/ has english-coach.md (System Prompt v0.1 — a coach for a Korean working-holiday participant in Toronto, suggesting 2–3 short responses in business/casual tone), plus translator.md and vision-labeler.md. These are prompt drafts, not yet called from code. docs/architecture.md, decisions.md, and use-cases.md describe the intended system — the plan, not the current build.

What is explicitly NOT built yet

To keep this honest:

• No /api/suggest, no LLM / STT / Vision calls. The backend exposes only /health.
• iOS has no Meta Wearables SDK, no Session.swift, no camera/mic capture.
• The full pipeline in docs/architecture.md (glasses → phone → backend → LLM) is the target, not what runs.

Note: CLAUDE.md lists backend/src/api/llm.ts and ios-app/SmartGlass/Core/Session.swift under "Important Files" — these don't exist yet; they're aspirational targets, not current files.

Commit: b2e672168356ba125be481e4c1eba627fab21968