# Tasks — game-server enhanced anti-cheat + interest + lag

## 1. Error codes

- [x] 1.1 Append `CHEAT_DETECTED`, `INVALID_VALIDATION_RULE`,
      `INVALID_ANTI_CHEAT_CONFIG`, `INTEREST_REGION_INVALID`,
      `INVALID_INTEREST_CONFIG`, `INTEREST_PLAYER_NOT_REGISTERED`,
      `LAG_COMPENSATION_HISTORY_EXCEEDED`,
      `INVALID_LAG_COMPENSATION_CONFIG`,
      `LAG_COMPENSATION_ENTITY_NOT_TRACKED` to `GAME_SERVER_CODES`.

## 2. Anti-cheat validator

- [x] 2.1 `src/enhanced/anti-cheat/anti-cheat-validator/anti-cheat-validator.types.ts`
      — Zod schemas for `AntiCheatConfig`, `MovementData`, `ActionData`,
      `RateLimitConfig`, `MovementConfig`, `PunishmentThresholds`; types
      for `Violation`, `ValidationResult`, `PlayerViolationHistory`,
      `AntiCheatStats`, `AntiCheatEventMap`, `ActionValidator`,
      `ValidationContext`.
- [x] 2.2 `anti-cheat-validator.ts` — `AntiCheatValidator` class with
      injected `Clock` + `IdGenerator`, OTel counter + histogram, listener
      registry. Public surface: `registerValidator`, `validateMovement`,
      `validateAction`, `checkRateLimit`, `getPlayerHistory`,
      `flagPlayer`/`unflagPlayer`, `banPlayer`/`isPlayerBanned`, `setTick`,
      `getStats`/`resetStats`, `clearPlayer`, `dispose`, `on`/`off`.
- [x] 2.3 `anti-cheat-validator.test.ts` — full coverage: movement ok /
      speed-hack / teleport / timing anomaly / vertical-speed cap; rate
      limit windowing; custom action validator success + failure +
      throwing; ban-status auto-escalation; auto-flag threshold; stats
      and disposal.
- [x] 2.4 `anti-cheat-validator.md` — Purpose / Features / Usage Basic /
      Usage Advanced / API Reference / Implementation Notes (≥200 words).
- [x] 2.5 `index.ts` — named re-exports only.

## 3. Interest manager

- [x] 3.1 `interest-manager.types.ts` — Zod schema for
      `InterestManagerConfig`; types for `Vector3`, zone discriminated
      union (`CircularZone` | `RectangularZone` | `CustomZone`),
      `TrackedEntity`, `PlayerSubscription`, `EntityVisibility`,
      `VisibilityChange`, `InterestStats`, `InterestEventMap`.
- [x] 3.2 `interest-manager.ts` — `InterestManager` class with injected
      `Clock`, OTel histogram + counter. Public surface: `registerZone`,
      `unregisterZone`, `updateEntity`, `removeEntity`, `registerPlayer`,
      `updatePlayerPosition`, `unregisterPlayer`, `subscribeToZone`,
      `unsubscribeFromZone`, `getVisibleEntities`,
      `calculateVisibilityChanges`, `isInZone`, `getZonesAtPoint`,
      `getZone`/`getAllZones`/`getEntity`, `start`/`stop`, `getStats`,
      `dispose`, `on`/`off`. No timer side-effects in constructor.
- [x] 3.3 `interest-manager.test.ts` — full coverage: zone register /
      unregister / sweep; entity add/move/remove; player register /
      view-distance cap; subscribe/unsubscribe; visibility enter/exit
      deltas; rectangular vs circular vs custom zone containment;
      stats; dispose.
- [x] 3.4 `interest-manager.md`.
- [x] 3.5 `index.ts`.

## 4. Lag compensator

- [x] 4.1 `lag-compensator.types.ts` — Zod schema for
      `LagCompensatorConfig`; types for `PlayerLatency`,
      `CompensatedState`, `HitValidationRequest`, `HitValidationResult`,
      `LagCompensatorStats`, `LagCompensatorEventMap`,
      `StateSnapshot`.
- [x] 4.2 `lag-compensator.ts` — `LagCompensator` class with injected
      `Clock`, bounded ring buffer per entity. Public surface:
      `recordState`, `updateRtt`, `getPlayerLatency`, `getStateAtTime`,
      `validateHit`, `getTrackedEntities`, `clearEntityHistory`,
      `removePlayer`, `getStats`/`resetStats`, `dispose`, `on`/`off`.
- [x] 4.3 `lag-compensator.test.ts` — full coverage: state recording +
      pruning; RTT sample windowing; latency statistics; exact-match /
      before-only / after-only / interpolated lookups; max-compensation
      clamp; hit validation valid + invalid + missing-state; events;
      stats reset; dispose.
- [x] 4.4 `lag-compensator.md`.
- [x] 4.5 `index.ts`.

## 5. Wiring

- [x] 5.1 Add subpath exports for the three new modules to
      `package.json`.
- [x] 5.2 Add new module re-exports to `src/index.ts` (Wave C-2 block).

## 6. Verification

- [x] 6.1 `bunx turbo lint typecheck test --filter=@suaveplan/game-server` — green.
- [x] 6.2 `bunx turbo test:coverage --filter=@suaveplan/game-server` — 100/100/100/100.
- [x] 6.3 No `from "vitest"` / `from "bun:test"` in `src/`.
- [x] 6.4 No `biome-ignore` / `TODO` / `FIXME` / `XXX` in `src/`.

## 7. Archive

- [ ] 7.1 Fold the spec delta into `openspec/specs/game-server/spec.md` and
      move the change folder to `openspec/archive/<yyyy-mm-dd>-game-server-enhanced-anti-cheat-lag/`
      after merge.