Emberfall/HANDOFF.md

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: 10.10 — Rest endpoint: POST /api/character/rest costs level*5 gold, heals to full max HP + dashboard button — TICKED in STATUS.md
• Next step: Phase 10.11 — Natural HP regeneration: +1% max HP/min, lazy computation, new migration adds hp_updated_at
• Updated: 2026-10-23
• 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	227 passing, 0 failing (85 unit + 142 integration incl. 5 rest endpoint tests)
npm run seed:dev	creates demo user "demo"/"demo123", hero "Aldric" (warrior), starter gear
npm start + curl localhost:3000/	200 HTML landing page
Open /game.html logged in → check dashboard	Shows rest button when HP < max, hidden when at full HP

3. What exists now (files that matter)

• src/services/characterService.js — Added rest() function: costs level*5 gold, heals to full max HP, errors NOTHING_TO_HEAL/INSUFFICIENT_GOLD
• src/routes/character.js — Added handleRest handler, exported postRest
• src/app.js — Mounted POST /api/character/rest route
• public/game.html — Added #rest-section div with #rest-btn button (hidden by default)
• public/css/main.css — Added .btn-rest styles
• public/js/game.js — Added initRestUI(), handleRest(), calls initRestUI from loadCharacter, attaches click handler
• tests/integration/step-10.10.test.js — 5 tests (happy heal, full HP rejection, insufficient gold, cross-user isolation, level scaling)

4. Half-finished / fragile things

• No leaderboard UI yet (stub page exists; real UI in 10.17).
• HP never regenerates naturally; only level-up/rest restores it. (10.11 next)
• 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.
• 10.11 next: Natural HP regeneration — +1% max HP/min, lazy computation like energy, migration adds hp_updated_at

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.
• D-019: Rate limiters use process.env.NODE_ENV === 'test' ? 100 : 100 for test env (relaxed to avoid test interference; prod limit same as test).
• D-020: allocatePoints in leveling.js accepts non-negative integers (0 allowed for unallocated stats) — changed from "positive integer" to support partial allocation via {str, agi, int, vit} where unmentioned stats default to 0.
• D-021: Allocation UI uses container.replaceChildren() instead of innerHTML = '' to avoid innerHTML entirely (per NOTES.md constraint).

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 AppErrors 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).
• GET /api/zones documented in API.md but not implemented.
• 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 relaxed limits; 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 since they're not static files.
• 10.6: Rate limiters add X-RateLimit-Limit and X-RateLimit-Remaining headers by default in express-rate-limit — use these to verify the limiter is real in tests.
• 10.6: Global /api limiter must be mounted BEFORE auth routes so it covers them; auth-specific limiters are stricter and will trigger first.
• 10.6: max: 100 in test env (not 1000) to avoid interference with other tests that also login. The 429 shape test uses a mini-app with max: 10 to validate the exact JSON body.
• 10.7: Express JSON parser throws SyntaxError with status: 400 for malformed JSON and PayloadTooLargeError with status: 413 for oversized body — catch these in the error handler before the ZodError check.
• 10.7: req.path.startsWith('/api/') is more reliable than req.accepts('html') for deciding JSON vs HTML on unknown paths — Node.js fetch defaults to accepting HTML.
• 10.7: Session store callbacks (regenerate, destroy) must use next(err) not throw — throw inside a callback is not caught by Express's error handler and can crash the process.
• 10.8: leveling.js's allocatePoints always returns remainingPoints: 0 — the service must compute character.unspent_points - total itself.
• 10.8: zod .strictObject with optional fields needs .refine() to require at least one field present.
• 10.8: For HTTP integration tests that need DB state setup, use direct service calls to set up state, then test the HTTP endpoint.
• 10.9: Allocation UI must use textContent, never innerHTML with dynamic data — use replaceChildren() instead of innerHTML = '' to clear containers.
• 10.9: initAllocationUI called from loadCharacter ensures UI stays in sync after any character data change (allocation, hunt, level-up).
• 10.10: setupHero helper must use .then() chain (not return async () => { ... }) — the latter returns a function that doesn't execute when awaited.
• 10.10: Warrior maxHp at level 1 = 135 (50 + 810 + 15); test setup must account for this when setting "full HP" values.

7. Next-step briefing

• Next step: 10.11 — Natural HP regeneration: +1% max HP/min, computed lazily like energy.
• New migration (next unused number, likely 007) adds hp_updated_at INTEGER column to characters table; backfill existing rows with energy_updated_at.
• Add pure function computeHp(current, maxHp, updatedAtMs, nowMs) in src/game/hp.js with unit tests (partial minute, cap at max, clock backwards, large gap).
• Apply computeHp before HP checks in: hunting, getCharacterProfile, potion use, and rest.
• Heals/damage must set hp_updated_at = now.