# HANDOFF.md — Session Handoff (OVERWRITE at the end of every phase or when context is getting long)

> **Read order for a new session:** `NOTES.md` → `STATUS.md` → this file → then work.
> If this file disagrees with the code, trust the code and fix this file.

## 1. Where we are
- **Last completed step:** 10.5 (Add landing page, fix "Return to Emberfall" links, add link-checker test) — TICKED in STATUS.md
- **Next step:** Phase 10.6 — Restore REAL rate limiting (re-enable login/register limiters, mount global /api limiter before auth routes)
- **Updated:** 2026-10-22
- **Was the last session cut off mid-task?** No

## 2. Verified state (run these first)
| Command | Expected |
|---|---|
| `npm install` | succeeds |
| `npm run migrate` | applies 001–006 / "nothing to do" |
| `npm test` | **193 passing, 0 failing** (85 unit + 108 integration incl. 5 new 10.5 tests) |
| `npm run seed:dev` | creates demo user "demo"/"demo123", hero "Aldric" (warrior), starter gear |
| `npm start` + `curl localhost:3000/` | 200 HTML landing page |
| `npm start` + `curl localhost:3000/api/health` | `{"ok":true}` |

## 3. What exists now (files that matter)
- `public/index.html` — Landing page (title, tagline, Login/Register buttons; "Play" button when logged in with hero). Uses `GET /api/auth/me` to detect auth state.
- `public/leaderboard.html` — Stub page (placeholder text; real UI in 10.17).
- `public/404.html` — Custom 404 error page. "Return to Emberfall" links to `/`.
- `public/500.html` — Custom 500 error page. "Return to Emberfall" links to `/`.
- `src/app.js` — Root route now serves `index.html` instead of redirecting to `/login.html`.
- `tests/integration/link-checker.test.js` — Reads all `public/*.html`, extracts local `href`/`src` values, asserts each target file exists. Skips API endpoints.
- `tests/integration/step-10.5.test.js` — 5 tests: GET / returns 200 HTML, Play button when logged in with hero, Login/Register when no hero, anonymous shows Login/Register, 404/500 have working links.
- `public/game.html` — Dashboard with 3-col grid (stats | action | combat), mobile bottom nav.
- `public/js/game.js` — hunt UI + inventory UI + expedition UI + mobile nav init.
- `public/css/main.css` — All styles including 3-col desktop grid, mobile bottom nav.
- `public/shop.html` / `public/js/shop.js` — Shop page (buy/sell).
- `public/login.html`, `public/register.html`, `public/create-hero.html` — Auth & hero creation.
- `public/profile.html` / `public/js/profile.js` — Public hero profile page.
- `public/js/auth.js` — Shared API wrapper + showError.
- `public/js/login.js` — Login form submits to `/api/auth/login`; on success uses `data.hasHero` to redirect.
- `public/js/create-hero.js` — Checks `/api/auth/me` on DOMContentLoaded, redirects to `/game.html` if `hasHero`.
- `public/js/toast.js` — Shared toast notification system.
- `src/services/expeditionService.js` — Fixed in 10.1 (energy tx params) + 10.2 (uses `applyXpGain`) + 10.3 (injectable `opts.now`/`opts.rng`).
- `src/services/huntService.js` — Refactored in 10.2 to use `applyXpGain`.
- `src/game/leveling.js` — Added `applyXpGain` shared function.
- `src/utils/time.js` — `{ now, setNow, resetNow }`.
- `src/utils/rng.js` — `{ mulberry32, rngInt, rngFloat, rngRange }`.
- `src/routes/auth.js` — `handleRegister` and `handleLogin` set `req.session.username`.

## 4. Half-finished / fragile things
- No leaderboard UI yet (stub page exists; real UI in 10.17).
- HP never regenerates naturally; only level-up restores it.
- No restart-persistence test for sessions.
- `npm run seed` script in package.json points to nonexistent `scripts/seed.js`.
- Equipment bonuses not yet passed into combat (Issue #5 in STATUS.md).
- Starter gear documented but not auto-created on character creation.
- `GET /api/zones` documented in API.md but not implemented (Issue #2).
- Mobile nav uses emoji icons (⚔️ 🏕️ 🎒) — verify they render acceptably on all platforms.
- **10.6 next:** Need to re-enable real rate limiters in `src/routes/auth.js` (currently no-ops), mount global `/api` limiter BEFORE auth routes, add test for 429 response.
- **10.17 next (after 10.6, 10.7, 10.8–10.13, 10.14–10.16):** Real leaderboard UI; remove stub; update link-checker exception.

## 5. Decisions & deviations from the docs
- D-004..D-007 in `docs/DECISIONS.md` (combat rounds, equipment counted once, session store, clock).
- **D-014:** Mobile bottom nav uses emoji icons (⚔️ Hunt / 🏕️ Trip / 🎒 Items) instead of full text labels.
- **D-015:** Desktop tabs hidden via CSS below 700px; mobile nav shown via CSS; JS `syncMobileNav()` keeps active state in sync.
- **D-016:** `applyXpGain` in `src/game/leveling.js` is the single shared function for XP gain logic, used by both `huntService` and `expeditionService`.
- **D-017:** Landing page `public/index.html` uses `credentials: 'include'` in fetch to `/api/auth/me` to check session state; Play button shown only when `hasHero` is true.
- **D-018:** Link-checker test skips API endpoints (`/api/...`) since they're not static files.

## 6. Gotchas learned
- `npm test` must be `node --test` with NO path/glob; files must be named `*.test.js`.
- better-sqlite3-session-store ignores `expired.clear: false`; that's why the timer is unref'd.
- Statement caches are per-DB-handle (WeakMap) in huntService; copy that pattern for new services.
- Verify test COUNT, not just "all passing".
- Node.js `fetch` doesn't persist cookies across calls — extract `Set-Cookie` header and pass manually in integration tests.
- SQL `SELECT id` from inventory returns the auto-increment row id; rename with `AS inventory_id` when you also need `item_id`.
- Transaction callback args must match the call order exactly. (This is the 10.1 bug — double-check param/call order in every new transaction.)
- Error responses from route-level `AppError`s do NOT include `data` field.
- `setNow` affects ALL `now()` calls including those in service logic.
- Shop API returns `{ ok: true, data: { stock: [...], character: {...} } }` — field is `stock`, not `stocks`.
- Shop stock items have flat fields (`itemId`, `buyPrice`), not nested (`item.id`).
- New characters have NO inventory items (starter gear not auto-created yet).
- Hero profile endpoint is PUBLIC — no `requireAuth` middleware.
- Profile page is public: no auth.js guard needed; uses ?name= query param for lookup.
- Rate limiters in tests: set `NODE_ENV=test` to get 1000 req/window limit; otherwise tests fail with 429.
- `seed-dev.js` must check `NODE_ENV=production` before any `require()` that loads config (config throws on placeholder SECRET).
- Express `sendFile` rejects `../` path segments — use `path.resolve()` + `path.join()` for absolute paths.
- `express.static` sends its own 404 responses; catch-all must be placed BEFORE static middleware.
- Character profile GET returns `{ ok: true, data: { character, derived, energy } }` — fields nested under `character`, `derived`, `energy`.
- Register returns 201 (Created), not 200.
- Character creation returns 201 (Created), not 200.
- Expedition start uses `defId` in request body (not `expeditionId`).
- Expedition claim uses `expeditionId` in request body.
- Expedition start response returns `data.expedition.id` — capture this for claim.
- `src/utils/time` exports `{ now, setNow, resetNow }` directly — `const time = require(...)`, not `const { time }`.
- Inventory sell endpoint (`POST /api/shop/sell`) only accepts `material`-type items.
- `handleListInventory` in `src/routes/inventory.js` — parameter name must be `res`, not `_res`.
- Character profile response has `energy` at `data.energy.current`, NOT `data.character.energy`.
- **10.3:** `expeditionService.js` import changed from `const { now, setNow } = require('../utils/time')` to `const time = require('../utils/time')` — the destructured `now` variable was shadowed by the local `opts.now ?? time.now()` pattern.
- **10.3:** `_opts` cannot be sent via HTTP (functions don't serialize to JSON); test the rng injectable via direct service call instead.
- **10.4:** `req.session.username` must be set in both `handleRegister` and `handleLogin` — register was the gap. `/me` reads it, so without it username is always empty string.
- **10.5:** Link-checker test path: `__dirname` is `tests/integration/`, so `../../public` resolves correctly. API endpoints (`/api/...`) must be excluded from link-checking since they're not static files.

## 7. Next-step briefing
- **Next step: 10.6** — Restore REAL rate limiting:
  - In `src/routes/auth.js`, the login and register limiters are no-ops (real ones commented out). Re-enable them.
  - Login: 10 requests / 15 min / IP. Register: 5 requests / hour / IP.
  - Use standard error envelope: `{ ok: false, error: { code: 'RATE_LIMITED', message: '...' } }`, status 429.
  - Mount global `/api` limiter BEFORE auth routes in `src/app.js` (currently after, so it doesn't cover auth).
  - Limits may be relaxed when `NODE_ENV=test` (e.g., 1000 req/window).
  - Add a test: enable real limiter, send 10 bad logins → 401, 11th → 429 JSON.