images

The merge brought in `CombatDto.rewards`, which the resume spec's fixture
predates.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.claude/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "api",
+      "runtimeExecutable": "npm",
+      "runtimeArgs": ["run", "dev:api"],
+      "port": 3000
+    },
+    {
+      "name": "web",
+      "runtimeExecutable": "npm",
+      "runtimeArgs": ["run", "dev:web"],
+      "port": 4200
+    }
+  ]
+}

.env.example

@@ -1,6 +1,10 @@
+# Copy this file to `.env` (repo root) and adjust as needed. See README.md
+# for the full local setup workflow (install, migrate, seed, run api/web).
 NODE_ENV=development
 PORT=3000
 
+# Requires a reachable PostgreSQL server with a database named `ashen_realms`
+# owned by this user/password (or your own local equivalent connection string).
 DATABASE_URL=postgresql://ashen:ashen@localhost:5432/ashen_realms
 
 JWT_ACCESS_SECRET=change-me

README.md

@@ -0,0 +1,176 @@
+# Ashen Realms
+
+A dark-fantasy browser RPG built as an npm-workspace modular monolith:
+
+- `apps/web` — Angular 22 single-page application
+- `apps/api` — NestJS 11 + TypeORM + PostgreSQL API
+- `packages/*` — reserved shared boundaries (currently unused)
+
+This README documents the first visible vertical slice: a server-authoritative
+world/travel loop between two locations (Südtor von Graufurt and Verbrannte
+Straße) for one demo character, with no login required.
+
+## Prerequisites
+
+- Node.js and npm (workspace-aware npm, matching the versions used by CI/your
+  toolchain).
+- A reachable PostgreSQL server (PostgreSQL 13 or newer — the schema uses the
+  built-in `gen_random_uuid()`, which needs no extensions) with a database
+  named `ashen_realms`. Create it once, e.g.:
+
+  ```powershell
+  psql -h localhost -U postgres -c "CREATE DATABASE ashen_realms;"
+  psql -h localhost -U postgres -c "CREATE USER ashen WITH PASSWORD 'ashen';"
+  psql -h localhost -U postgres -c "GRANT ALL PRIVILEGES ON DATABASE ashen_realms TO ashen;"
+  ```
+
+  Adjust user/password/host to match your own local PostgreSQL instance; just
+  keep `DATABASE_URL` (below) pointed at it.
+
+## Local setup
+
+Run from the repository root:
+
+```powershell
+npm install
+Copy-Item .env.example .env
+npm run db:migrate
+npm run db:seed
+npm run dev:api
+npm run dev:web
+```
+
+Run `dev:api` and `dev:web` in separate terminals — both watch and keep
+running. Once both are up:
+
+- API: `http://localhost:3000/api/...` (see routes below)
+- Web: `http://localhost:4200`, which proxies `/api/*` requests to
+  `http://localhost:3000` in development (see `apps/web/proxy.conf.json`)
+
+Open `http://localhost:4200/world` to see Aric Duskwalker at the Südtor von
+Graufurt and travel to the Verbrannte Straße and back.
+
+### Configuration (`.env`)
+
+`.env.example` (repo root) documents every variable. Copy it to `.env` at the
+repo root — `.env` is git-ignored and must never be committed. The important
+one for local setup is:
+
+```
+DATABASE_URL=postgresql://ashen:ashen@localhost:5432/ashen_realms
+```
+
+This is the default local PostgreSQL connection string: database name
+`ashen_realms`, default port `5432`. Edit it if your local PostgreSQL uses a
+different user, password, host, or port. All API workspace scripts
+(`db:migrate`, `db:seed`, `dev:api`, and `apps/api`'s own `test:e2e`) resolve
+this `.env` from the repository root regardless of which workspace directory
+npm runs the underlying command in.
+
+`synchronize` is always `false`; schema changes only happen through the
+checked-in migration at
+`apps/api/src/database/migrations/1787072400000-CreateVisibleVerticalSlice.ts`.
+The seed (`apps/api/src/database/seeds/vertical-slice.seed.ts`) is idempotent:
+running `npm run db:seed` multiple times upserts the same two locations, two
+connections, and one demo character without creating duplicates or resetting
+the character's current (live) location.
+
+### Ports
+
+| Service | Port | Notes |
+|---|---|---|
+| API (NestJS) | `3000` | All routes are under `/api` (e.g. `/api/health`). |
+| Web (Angular dev server) | `4200` | Proxies `/api/*` to the API in development. |
+
+## Available routes (first slice)
+
+```
+GET  /api/health
+GET  /api/characters/me
+GET  /api/world/current-location
+GET  /api/travel/current
+POST /api/travel                 { "targetLocationId": "<uuid>" }
+```
+
+`POST /api/travel` accepts exactly `targetLocationId`; the global validation
+pipe rejects any other property (e.g. a client-supplied `arrivesAt`) with
+`400 Bad Request`, since `arrivesAt` is always server-derived.
+
+## Assets
+
+`apps/web/public/images` holds only the derivative image files the Angular
+build actually serves (resized `runtime/*-128.png` HUD icons, `runtime/*-960.jpg`
+and `runtime/*-1440.jpg` background variants, and the small set of PNG
+fallbacks referenced directly by source/styles). Everything under `apps/web/public`
+is copied verbatim into the browser build, so keep that folder limited to
+files a component, template, or stylesheet actually references.
+
+Original/unresized source art (enemy, NPC, and combat-status artwork, HUD icon
+originals, difficulty badges, etc.) that isn't loaded by the app lives in
+`art/` at the repository root instead, mirroring the same subfolder layout
+(e.g. `art/enemies`, `art/npc`, `art/hud`). It is not part of any build output.
+
+## Scripts
+
+Run these from the repository root unless noted otherwise.
+
+| Script | Description |
+|---|---|
+| `npm run dev:web` | Start the Angular dev server (port 4200). |
+| `npm run dev:api` | Start the NestJS API in watch mode (port 3000). |
+| `npm run build:web` | Production build of the Angular app. |
+| `npm run build:api` | Production build of the NestJS app. |
+| `npm run build` | Both builds. |
+| `npm test` | Unit tests for every workspace. |
+| `npm run test:e2e` | API end-to-end/smoke tests (see below). |
+| `npm run db:migrate` | Run pending TypeORM migrations against `DATABASE_URL`. |
+| `npm run db:revert` | Revert the last migration. |
+| `npm run db:seed` | Run the idempotent demo-content seed. |
+
+## Testing
+
+Unit tests never require a database:
+
+```powershell
+npm test --workspace=@ashen-realms/api -- --runInBand
+```
+
+The API end-to-end smoke test (`apps/api/test/visible-slice.e2e-spec.ts`)
+always asserts `GET /api/health`. When `DATABASE_URL` is set and reachable,
+it additionally boots the real `AppModule` (real database, entities, and
+controllers) and asserts the seeded character/world responses and the
+`arrivesAt` validation rejection. Those database-backed assertions are
+skipped — not failed — when no database is configured, so `npm run test:e2e`
+is safe to run without any local PostgreSQL setup too:
+
+```powershell
+npm run test:e2e --workspace=@ashen-realms/api -- --runInBand
+```
+
+Both builds:
+
+```powershell
+npm run build:api
+npm run build:web
+```
+
+## Known limitations of this first vertical slice
+
+This slice deliberately excludes (per
+`docs/superpowers/specs/2026-08-18-first-visible-vertical-slice-design.md`):
+
+- Authentication, user accounts, JWTs, or any login/registration flow — there
+  is exactly one hardcoded demo character (Aric Duskwalker).
+- Hunting, combat, loot, inventory, equipment, quests, merchants, and
+  currencies.
+- Realtime features: WebSockets, chat, guilds, CMS, object storage, or a
+  multi-service/microservice architecture.
+- Ambush resolution: `ambushChance` is stored on each connection and surfaced
+  only as a coarse `LOW`/`HIGH` danger rating; it is never rolled.
+- Production containerization or NestJS static hosting.
+- Client-side clock skew can shift how the travel countdown *displays*, but
+  arrival is always confirmed by the server (`GET /api/travel/current` /
+  `GET /api/world/current-location`), never inferred locally.
+
+Only two locations and one directed pair of connections exist
+(`south-gate` ⇄ `burned-road`), each with a fixed 10-second travel duration.

apps/api/package.json

@@ -13,18 +13,26 @@
     "start:debug": "nest start --debug --watch",
     "start:prod": "node dist/main",
     "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
-    "test": "jest",
+    "test": "jest --detectOpenHandles",
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "jest --config ./test/jest-e2e.json"
+    "test:e2e": "jest --config ./test/jest-e2e.json",
+    "typeorm": "typeorm-ts-node-commonjs",
+    "seed": "ts-node src/database/seeds/run-seed.ts"
   },
   "dependencies": {
     "@nestjs/common": "^11.0.1",
     "@nestjs/core": "^11.0.1",
-    "@nestjs/platform-express": "^11.0.1",
+    "@nestjs/platform-express": "^11.2.1",
+    "@nestjs/typeorm": "^11.0.3",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.15.1",
+    "dotenv": "^17.4.2",
+    "pg": "^8.23.0",
     "reflect-metadata": "^0.2.2",
-    "rxjs": "^7.8.1"
+    "rxjs": "^7.8.1",
+    "typeorm": "^1.1.0"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",

apps/api/src/app.config.ts

@@ -0,0 +1,12 @@
+import { INestApplication, ValidationPipe } from '@nestjs/common';
+
+export function configureApplication(app: INestApplication): void {
+  app.setGlobalPrefix('api');
+  app.useGlobalPipes(
+    new ValidationPipe({
+      whitelist: true,
+      forbidNonWhitelisted: true,
+      transform: true,
+    }),
+  );
+}

apps/api/src/app.controller.spec.ts

@@ -1,22 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
-
-describe('AppController', () => {
-  let appController: AppController;
-
-  beforeEach(async () => {
-    const app: TestingModule = await Test.createTestingModule({
-      controllers: [AppController],
-      providers: [AppService],
-    }).compile();
-
-    appController = app.get<AppController>(AppController);
-  });
-
-  describe('root', () => {
-    it('should return "Hello World!"', () => {
-      expect(appController.getHello()).toBe('Hello World!');
-    });
-  });
-});

apps/api/src/app.controller.ts

@@ -1,12 +0,0 @@
-import { Controller, Get } from '@nestjs/common';
-import { AppService } from './app.service';
-
-@Controller()
-export class AppController {
-  constructor(private readonly appService: AppService) {}
-
-  @Get()
-  getHello(): string {
-    return this.appService.getHello();
-  }
-}

apps/api/src/app.module.ts

@@ -1,10 +1,21 @@
 import { Module } from '@nestjs/common';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
+import { CharactersModule } from './characters/characters.module';
+import { CombatModule } from './combat/combat.module';
+import { DatabaseModule } from './database/database.module';
+import { HealthModule } from './health/health.module';
+import { HuntingModule } from './hunting/hunting.module';
+import { TravelModule } from './travel/travel.module';
+import { WorldModule } from './world/world.module';
 
 @Module({
-  imports: [],
-  controllers: [AppController],
-  providers: [AppService],
+  imports: [
+    DatabaseModule,
+    HealthModule,
+    CharactersModule,
+    TravelModule,
+    WorldModule,
+    HuntingModule,
+    CombatModule,
+  ],
 })
 export class AppModule {}

apps/api/src/app.service.ts

@@ -1,8 +0,0 @@
-import { Injectable } from '@nestjs/common';
-
-@Injectable()
-export class AppService {
-  getHello(): string {
-    return 'Hello World!';
-  }
-}

apps/api/src/characters/character-combat-stats.service.spec.ts

@@ -0,0 +1,16 @@
+import { CharacterCombatStatsService } from './character-combat-stats.service';
+import { Character } from './entities/character.entity';
+
+describe('CharacterCombatStatsService', () => {
+  it('derives combat stats from the character, with a temporary fixed weapon/armor stand-in', () => {
+    const service = new CharacterCombatStatsService();
+    const character = { baseHp: 100, baseAttack: 6 } as Character;
+
+    expect(service.getStats(character)).toEqual({
+      maxHp: 100,
+      attack: 6,
+      weaponDamage: 8,
+      armor: 6,
+    });
+  });
+});

apps/api/src/characters/character-combat-stats.service.ts

@@ -0,0 +1,28 @@
+import { Injectable } from '@nestjs/common';
+import { Character } from './entities/character.entity';
+
+export interface CharacterCombatStats {
+  maxHp: number;
+  attack: number;
+  weaponDamage: number;
+  armor: number;
+}
+
+// TEMPORARY (Slice 0.3): there is no equipment system yet. These constants
+// stand in for the starting weapon/armor until Slice 0.5 introduces real
+// equipment. Replacing them there must not change this method's signature
+// or the combat API it feeds (spec §10).
+const TEMPORARY_WEAPON_DAMAGE = 8;
+const TEMPORARY_ARMOR = 6;
+
+@Injectable()
+export class CharacterCombatStatsService {
+  getStats(character: Character): CharacterCombatStats {
+    return {
+      maxHp: character.baseHp,
+      attack: character.baseAttack,
+      weaponDamage: TEMPORARY_WEAPON_DAMAGE,
+      armor: TEMPORARY_ARMOR,
+    };
+  }
+}

apps/api/src/characters/characters.controller.ts

@@ -0,0 +1,12 @@
+import { Controller, Get } from '@nestjs/common';
+import { CharactersService } from './characters.service';
+
+@Controller('characters')
+export class CharactersController {
+  constructor(private readonly charactersService: CharactersService) {}
+
+  @Get('me')
+  getDemoCharacter() {
+    return this.charactersService.getDemoCharacter();
+  }
+}

apps/api/src/characters/characters.module.ts

@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { CharacterCombatStatsService } from './character-combat-stats.service';
+import { CharactersController } from './characters.controller';
+import { CharactersService } from './characters.service';
+import { Character } from './entities/character.entity';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([Character])],
+  controllers: [CharactersController],
+  providers: [CharactersService, CharacterCombatStatsService],
+  exports: [CharacterCombatStatsService],
+})
+export class CharactersModule {}

apps/api/src/characters/characters.service.spec.ts

@@ -0,0 +1,85 @@
+import { NotFoundException } from '@nestjs/common';
+import { Repository } from 'typeorm';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { SOUTH_GATE_ID } from '../database/seeds/vertical-slice.constants';
+import { Character } from './entities/character.entity';
+import { CharactersService } from './characters.service';
+
+describe('CharactersService', () => {
+  it('returns the demo character with its current location summary', async () => {
+    const repository = {
+      findOne: jest.fn().mockResolvedValue({
+        id: DEMO_CHARACTER_ID,
+        name: 'Aric Duskwalker',
+        level: 1,
+        experience: 0,
+        silver: 0,
+        currentHp: 100,
+        baseHp: 100,
+        baseAttack: 6,
+        currentLocation: {
+          id: SOUTH_GATE_ID,
+          key: 'south-gate',
+          name: 'S\u00fcdtor von Graufurt',
+        },
+      }),
+    } as unknown as Repository<Character>;
+    const service = new CharactersService(repository);
+
+    await expect(service.getDemoCharacter()).resolves.toEqual({
+      id: DEMO_CHARACTER_ID,
+      name: 'Aric Duskwalker',
+      level: 1,
+      experience: 0,
+      silver: 0,
+      currentHp: 100,
+      maxHp: 100,
+      attack: 6,
+      currentLocation: {
+        id: SOUTH_GATE_ID,
+        key: 'south-gate',
+        name: 'S\u00fcdtor von Graufurt',
+      },
+    });
+    expect(repository.findOne).toHaveBeenCalledWith({
+      where: { id: DEMO_CHARACTER_ID },
+      relations: { currentLocation: true },
+    });
+  });
+
+  it('exposes the persisted silver so the HUD never has to guess', async () => {
+    const repository = {
+      findOne: jest.fn().mockResolvedValue({
+        id: DEMO_CHARACTER_ID,
+        name: 'Aric Duskwalker',
+        level: 1,
+        experience: 24,
+        silver: 18,
+        currentHp: 100,
+        baseHp: 100,
+        baseAttack: 6,
+        currentLocation: {
+          id: SOUTH_GATE_ID,
+          key: 'south-gate',
+          name: 'Südtor von Graufurt',
+        },
+      }),
+    } as unknown as Repository<Character>;
+    const service = new CharactersService(repository);
+
+    await expect(service.getDemoCharacter()).resolves.toEqual(
+      expect.objectContaining({ experience: 24, silver: 18 }),
+    );
+  });
+
+  it('reports a missing demo seed as not found', async () => {
+    const repository = {
+      findOne: jest.fn().mockResolvedValue(null),
+    } as unknown as Repository<Character>;
+    const service = new CharactersService(repository);
+
+    await expect(service.getDemoCharacter()).rejects.toBeInstanceOf(
+      NotFoundException,
+    );
+  });
+});

apps/api/src/characters/characters.service.ts

@@ -0,0 +1,40 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { Character } from './entities/character.entity';
+
+@Injectable()
+export class CharactersService {
+  constructor(
+    @InjectRepository(Character)
+    private readonly characters: Repository<Character>,
+  ) {}
+
+  async getDemoCharacter() {
+    const character = await this.characters.findOne({
+      where: { id: DEMO_CHARACTER_ID },
+      relations: { currentLocation: true },
+    });
+
+    if (!character) {
+      throw new NotFoundException('Demo character has not been seeded');
+    }
+
+    return {
+      id: character.id,
+      name: character.name,
+      level: character.level,
+      experience: character.experience,
+      silver: character.silver,
+      currentHp: character.currentHp,
+      maxHp: character.baseHp,
+      attack: character.baseAttack,
+      currentLocation: {
+        id: character.currentLocation.id,
+        key: character.currentLocation.key,
+        name: character.currentLocation.name,
+      },
+    };
+  }
+}

apps/api/src/characters/entities/character.entity.ts

@@ -0,0 +1,52 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+
+@Entity({ name: 'characters' })
+export class Character {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'name', type: 'varchar', length: 150 })
+  name!: string;
+
+  @Column({ name: 'level', type: 'integer' })
+  level!: number;
+
+  @Column({ name: 'experience', type: 'integer' })
+  experience!: number;
+
+  @Column({ name: 'silver', type: 'integer' })
+  silver!: number;
+
+  @Column({ name: 'base_hp', type: 'integer' })
+  baseHp!: number;
+
+  @Column({ name: 'base_attack', type: 'integer' })
+  baseAttack!: number;
+
+  @Column({ name: 'current_hp', type: 'integer' })
+  currentHp!: number;
+
+  @Column({ name: 'current_location_id', type: 'uuid' })
+  currentLocationId!: string;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+
+  @ManyToOne(() => LocationDefinition, (location) => location.characters, {
+    onDelete: 'RESTRICT',
+  })
+  @JoinColumn({ name: 'current_location_id' })
+  currentLocation!: LocationDefinition;
+}

apps/api/src/combat/combat-action.enum.ts

@@ -0,0 +1,6 @@
+// Only ATTACK is implemented in Slice 0.3. Future slices add HEAVY_STRIKE,
+// SHIELD_BASH, DEFEND, POTION, FLEE as real members with their own
+// CombatEngineService cases — do not add them here until their behavior ships.
+export enum CombatAction {
+  ATTACK = 'ATTACK',
+}

apps/api/src/combat/combat-damage.spec.ts

@@ -0,0 +1,17 @@
+import { calculateDamage } from './combat-damage';
+
+describe('calculateDamage', () => {
+  it('applies the established armor mitigation formula', () => {
+    // raw = 12 + 15 = 27; 27 * 60 / (60 + 20) = 20.25 -> rounds to 20
+    expect(calculateDamage({ attack: 12, weaponDamage: 15 }, 20)).toBe(20);
+  });
+
+  it('never returns less than 1 damage, even against extreme armor', () => {
+    expect(calculateDamage({ attack: 1, weaponDamage: 0 }, 100_000)).toBe(1);
+  });
+
+  it('treats an attacker with no weaponDamage as having attack alone as its raw damage', () => {
+    // raw = 9; 9 * 60 / (60 + 5) = 8.307... -> rounds to 8
+    expect(calculateDamage({ attack: 9 }, 5)).toBe(8);
+  });
+});

apps/api/src/combat/combat-damage.ts

@@ -0,0 +1,13 @@
+export interface DamageAttacker {
+  attack: number;
+  weaponDamage?: number;
+}
+
+const ARMOR_MITIGATION_CONSTANT = 60;
+
+export function calculateDamage(attacker: DamageAttacker, targetArmor: number): number {
+  const rawDamage = attacker.attack + (attacker.weaponDamage ?? 0);
+  const mitigatedDamage =
+    (rawDamage * ARMOR_MITIGATION_CONSTANT) / (ARMOR_MITIGATION_CONSTANT + targetArmor);
+  return Math.max(1, Math.round(mitigatedDamage));
+}

apps/api/src/combat/combat-engine.service.spec.ts

@@ -0,0 +1,107 @@
+import { CombatAction } from './combat-action.enum';
+import { CombatEngineService, UnsupportedCombatActionError } from './combat-engine.service';
+import { CombatEngineState } from './combat-engine.types';
+import { CombatEventType } from './combat-event-type.enum';
+import { CombatStatus } from './combat-status.enum';
+import { Combatant } from './combatant.enum';
+
+function baseState(overrides: Partial<CombatEngineState> = {}): CombatEngineState {
+  return {
+    status: CombatStatus.ACTIVE,
+    round: 1,
+    player: {
+      currentHp: 100,
+      maxHp: 100,
+      stats: { attack: 6, weaponDamage: 8, armor: 6 },
+    },
+    monster: {
+      currentHp: 45,
+      maxHp: 45,
+      stats: { attack: 5, armor: 0 },
+    },
+    ...overrides,
+  };
+}
+
+describe('CombatEngineService', () => {
+  let engine: CombatEngineService;
+
+  beforeEach(() => {
+    engine = new CombatEngineService();
+  });
+
+  it('reduces monster HP by the calculated damage and emits a DAMAGE event', () => {
+    const result = engine.resolveAction(baseState(), { action: CombatAction.ATTACK });
+
+    // raw = 6 + 8 = 14; armor 0 -> 14 mitigated
+    expect(result.state.monster.currentHp).toBe(45 - 14);
+    expect(result.events[0]).toEqual({
+      source: Combatant.PLAYER,
+      target: Combatant.MONSTER,
+      type: CombatEventType.DAMAGE,
+      amount: 14,
+    });
+  });
+
+  it('lets the monster retaliate when it survives the player attack, and advances the round', () => {
+    const result = engine.resolveAction(baseState(), { action: CombatAction.ATTACK });
+
+    // raw = 5; armor 6 -> 5*60/66 = 4.545 -> rounds to 5
+    expect(result.state.player.currentHp).toBe(100 - 5);
+    expect(result.events[1]).toEqual({
+      source: Combatant.MONSTER,
+      target: Combatant.PLAYER,
+      type: CombatEventType.DAMAGE,
+      amount: 5,
+    });
+    expect(result.state.status).toBe(CombatStatus.ACTIVE);
+    expect(result.state.round).toBe(2);
+  });
+
+  it('does not let the monster attack once it is reduced to 0 HP, and ends the combat as WON', () => {
+    const state = baseState({
+      monster: { currentHp: 10, maxHp: 45, stats: { attack: 5, armor: 0 } },
+    });
+
+    const result = engine.resolveAction(state, { action: CombatAction.ATTACK });
+
+    expect(result.state.monster.currentHp).toBe(0);
+    expect(result.state.status).toBe(CombatStatus.WON);
+    expect(result.state.round).toBe(1);
+    expect(result.events).toEqual([
+      { source: Combatant.PLAYER, target: Combatant.MONSTER, type: CombatEventType.DAMAGE, amount: 14 },
+      { source: Combatant.PLAYER, target: Combatant.MONSTER, type: CombatEventType.COMBAT_WON },
+    ]);
+  });
+
+  it('ends the combat as LOST when the monster attack reduces the player to 0 HP', () => {
+    const state = baseState({
+      player: { currentHp: 3, maxHp: 100, stats: { attack: 6, weaponDamage: 8, armor: 6 } },
+    });
+
+    const result = engine.resolveAction(state, { action: CombatAction.ATTACK });
+
+    expect(result.state.player.currentHp).toBe(0);
+    expect(result.state.status).toBe(CombatStatus.LOST);
+    expect(result.events).toEqual([
+      { source: Combatant.PLAYER, target: Combatant.MONSTER, type: CombatEventType.DAMAGE, amount: 14 },
+      { source: Combatant.MONSTER, target: Combatant.PLAYER, type: CombatEventType.DAMAGE, amount: 5 },
+      { source: Combatant.MONSTER, target: Combatant.PLAYER, type: CombatEventType.COMBAT_LOST },
+    ]);
+  });
+
+  it('produces the exact same result for the same state and action (determinism)', () => {
+    const state = baseState();
+
+    const first = engine.resolveAction(state, { action: CombatAction.ATTACK });
+    const second = engine.resolveAction(state, { action: CombatAction.ATTACK });
+
+    expect(first).toEqual(second);
+  });
+
+  it('throws UnsupportedCombatActionError for an action it does not implement', () => {
+    expect(() =>
+      engine.resolveAction(baseState(), { action: 'HEAVY_STRIKE' as CombatAction }),
+    ).toThrow(UnsupportedCombatActionError);
+  });
+});

apps/api/src/combat/combat-engine.service.ts

@@ -0,0 +1,83 @@
+import { Injectable } from '@nestjs/common';
+import { CombatAction } from './combat-action.enum';
+import { calculateDamage } from './combat-damage';
+import { Combatant } from './combatant.enum';
+import {
+  CombatActionInput,
+  CombatEngineEvent,
+  CombatEngineResult,
+  CombatEngineState,
+} from './combat-engine.types';
+import { CombatEventType } from './combat-event-type.enum';
+import { CombatStatus } from './combat-status.enum';
+
+export class UnsupportedCombatActionError extends Error {
+  constructor(action: string) {
+    super(`Unsupported combat action: ${action}`);
+  }
+}
+
+@Injectable()
+export class CombatEngineService {
+  resolveAction(state: CombatEngineState, input: CombatActionInput): CombatEngineResult {
+    switch (input.action) {
+      case CombatAction.ATTACK:
+        return this.resolveAttack(state);
+      default:
+        throw new UnsupportedCombatActionError(input.action);
+    }
+  }
+
+  private resolveAttack(state: CombatEngineState): CombatEngineResult {
+    const events: CombatEngineEvent[] = [];
+    const player = { ...state.player };
+    const monster = { ...state.monster };
+
+    const playerDamage = calculateDamage(player.stats, monster.stats.armor);
+    monster.currentHp = Math.max(0, monster.currentHp - playerDamage);
+    events.push({
+      source: Combatant.PLAYER,
+      target: Combatant.MONSTER,
+      type: CombatEventType.DAMAGE,
+      amount: playerDamage,
+    });
+
+    if (monster.currentHp <= 0) {
+      events.push({
+        source: Combatant.PLAYER,
+        target: Combatant.MONSTER,
+        type: CombatEventType.COMBAT_WON,
+      });
+      return {
+        state: { ...state, player, monster, status: CombatStatus.WON },
+        events,
+      };
+    }
+
+    const monsterDamage = calculateDamage(monster.stats, player.stats.armor);
+    player.currentHp = Math.max(0, player.currentHp - monsterDamage);
+    events.push({
+      source: Combatant.MONSTER,
+      target: Combatant.PLAYER,
+      type: CombatEventType.DAMAGE,
+      amount: monsterDamage,
+    });
+
+    if (player.currentHp <= 0) {
+      events.push({
+        source: Combatant.MONSTER,
+        target: Combatant.PLAYER,
+        type: CombatEventType.COMBAT_LOST,
+      });
+      return {
+        state: { ...state, player, monster, status: CombatStatus.LOST },
+        events,
+      };
+    }
+
+    return {
+      state: { ...state, player, monster, status: CombatStatus.ACTIVE, round: state.round + 1 },
+      events,
+    };
+  }
+}

apps/api/src/combat/combat-engine.types.ts

@@ -0,0 +1,39 @@
+import { Combatant } from './combatant.enum';
+import { CombatAction } from './combat-action.enum';
+import { CombatEventType } from './combat-event-type.enum';
+import { CombatStatus } from './combat-status.enum';
+
+export interface CombatEngineCombatantStats {
+  attack: number;
+  weaponDamage?: number;
+  armor: number;
+}
+
+export interface CombatEngineCombatant {
+  currentHp: number;
+  maxHp: number;
+  stats: CombatEngineCombatantStats;
+}
+
+export interface CombatEngineState {
+  status: CombatStatus;
+  round: number;
+  player: CombatEngineCombatant;
+  monster: CombatEngineCombatant;
+}
+
+export interface CombatActionInput {
+  action: CombatAction;
+}
+
+export interface CombatEngineEvent {
+  source: Combatant;
+  target: Combatant;
+  type: CombatEventType;
+  amount?: number;
+}
+
+export interface CombatEngineResult {
+  state: CombatEngineState;
+  events: CombatEngineEvent[];
+}

apps/api/src/combat/combat-event-type.enum.ts

@@ -0,0 +1,5 @@
+export enum CombatEventType {
+  DAMAGE = 'DAMAGE',
+  COMBAT_WON = 'COMBAT_WON',
+  COMBAT_LOST = 'COMBAT_LOST',
+}

apps/api/src/combat/combat-status.enum.ts

@@ -0,0 +1,5 @@
+export enum CombatStatus {
+  ACTIVE = 'ACTIVE',
+  WON = 'WON',
+  LOST = 'LOST',
+}

apps/api/src/combat/combat.controller.spec.ts

@@ -0,0 +1,97 @@
+import { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { configureApplication } from '../app.config';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { CombatController } from './combat.controller';
+import { CombatService } from './combat.service';
+
+describe('CombatController', () => {
+  let app: INestApplication<App>;
+  const getCombat = jest.fn();
+  const getActiveCombat = jest.fn();
+  const performAction = jest.fn();
+
+  beforeEach(async () => {
+    getCombat.mockReset();
+    getActiveCombat.mockReset();
+    performAction.mockReset();
+    const module = await Test.createTestingModule({
+      controllers: [CombatController],
+      providers: [
+        { provide: CombatService, useValue: { getCombat, getActiveCombat, performAction } },
+      ],
+    }).compile();
+
+    app = module.createNestApplication<App>();
+    configureApplication(app);
+    await app.init();
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+
+  it('delegates GET /api/combats/:combatId to combatService.getCombat', async () => {
+    const combat = { id: 'combat-1', status: 'ACTIVE', round: 1, player: {}, monster: {}, events: [], rewards: null };
+    getCombat.mockResolvedValue(combat);
+
+    const response = await request(app.getHttpServer()).get('/api/combats/combat-1').expect(200);
+
+    expect(getCombat).toHaveBeenCalledWith(DEMO_CHARACTER_ID, 'combat-1');
+    expect(response.body).toEqual(combat);
+  });
+
+  it('delegates GET /api/combats/active to combatService.getActiveCombat', async () => {
+    const combat = { id: 'combat-1', status: 'ACTIVE', round: 3, player: {}, monster: {}, events: [], rewards: null };
+    getActiveCombat.mockResolvedValue(combat);
+
+    const response = await request(app.getHttpServer()).get('/api/combats/active').expect(200);
+
+    expect(getActiveCombat).toHaveBeenCalledWith(DEMO_CHARACTER_ID);
+    expect(getCombat).not.toHaveBeenCalled();
+    expect(response.body).toEqual(combat);
+  });
+
+  it('returns an empty body from GET /api/combats/active when no combat is running', async () => {
+    getActiveCombat.mockResolvedValue(null);
+
+    const response = await request(app.getHttpServer()).get('/api/combats/active').expect(200);
+
+    expect(getActiveCombat).toHaveBeenCalledWith(DEMO_CHARACTER_ID);
+    expect(response.body).toEqual({});
+    expect(getCombat).not.toHaveBeenCalled();
+  });
+
+  it('delegates POST /api/combats/:combatId/actions with only the action field', async () => {
+    const combat = { id: 'combat-1', status: 'ACTIVE', round: 2, player: {}, monster: {}, events: [], rewards: null };
+    performAction.mockResolvedValue(combat);
+
+    const response = await request(app.getHttpServer())
+      .post('/api/combats/combat-1/actions')
+      .send({ action: 'ATTACK' })
+      .expect(201);
+
+    expect(performAction).toHaveBeenCalledWith(DEMO_CHARACTER_ID, 'combat-1', 'ATTACK');
+    expect(response.body).toEqual(combat);
+  });
+
+  it('rejects an unknown action value', async () => {
+    await request(app.getHttpServer())
+      .post('/api/combats/combat-1/actions')
+      .send({ action: 'HEAVY_STRIKE' })
+      .expect(400);
+
+    expect(performAction).not.toHaveBeenCalled();
+  });
+
+  it('rejects server-owned combat fields the client must never send', async () => {
+    await request(app.getHttpServer())
+      .post('/api/combats/combat-1/actions')
+      .send({ action: 'ATTACK', damage: 999, playerHp: 1, monsterHp: 1, round: 99 })
+      .expect(400);
+
+    expect(performAction).not.toHaveBeenCalled();
+  });
+});

apps/api/src/combat/combat.controller.ts

@@ -0,0 +1,25 @@
+import { Body, Controller, Get, Param, Post } from '@nestjs/common';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { CombatActionDto } from './dto/combat-action.dto';
+import { CombatService } from './combat.service';
+
+@Controller('combats')
+export class CombatController {
+  constructor(private readonly combatService: CombatService) {}
+
+  // Declared before ':combatId' so the literal segment wins the route match.
+  @Get('active')
+  getActiveCombat() {
+    return this.combatService.getActiveCombat(DEMO_CHARACTER_ID);
+  }
+
+  @Get(':combatId')
+  getCombat(@Param('combatId') combatId: string) {
+    return this.combatService.getCombat(DEMO_CHARACTER_ID, combatId);
+  }
+
+  @Post(':combatId/actions')
+  performAction(@Param('combatId') combatId: string, @Body() dto: CombatActionDto) {
+    return this.combatService.performAction(DEMO_CHARACTER_ID, combatId, dto.action);
+  }
+}

apps/api/src/combat/combat.errors.ts

@@ -0,0 +1,87 @@
+import { HttpException, HttpStatus } from '@nestjs/common';
+
+export type CombatErrorCode =
+  | 'HUNT_ENCOUNTER_NOT_FOUND'
+  | 'HUNT_ENCOUNTER_ALREADY_CONSUMED'
+  | 'INVALID_HUNT_ENCOUNTER'
+  | 'CHARACTER_TRAVELLING'
+  | 'COMBAT_ALREADY_ACTIVE'
+  | 'COMBAT_NOT_FOUND'
+  | 'COMBAT_ALREADY_FINISHED'
+  | 'COMBAT_STATE_INVALID';
+
+export class CombatDomainError extends HttpException {
+  constructor(
+    public readonly code: CombatErrorCode,
+    status: HttpStatus,
+    message: string,
+  ) {
+    super({ statusCode: status, code, message }, status);
+  }
+}
+
+export function huntEncounterNotFound(): CombatDomainError {
+  return new CombatDomainError(
+    'HUNT_ENCOUNTER_NOT_FOUND',
+    HttpStatus.NOT_FOUND,
+    'This encounter could not be found.',
+  );
+}
+
+export function huntEncounterAlreadyConsumed(): CombatDomainError {
+  return new CombatDomainError(
+    'HUNT_ENCOUNTER_ALREADY_CONSUMED',
+    HttpStatus.CONFLICT,
+    'This encounter has already been used to start a combat.',
+  );
+}
+
+export function invalidHuntEncounter(): CombatDomainError {
+  return new CombatDomainError(
+    'INVALID_HUNT_ENCOUNTER',
+    HttpStatus.BAD_REQUEST,
+    'This encounter is not valid for the current character.',
+  );
+}
+
+export function characterTravelling(): CombatDomainError {
+  return new CombatDomainError(
+    'CHARACTER_TRAVELLING',
+    HttpStatus.CONFLICT,
+    'The character cannot fight while travelling.',
+  );
+}
+
+export function combatAlreadyActive(): CombatDomainError {
+  return new CombatDomainError(
+    'COMBAT_ALREADY_ACTIVE',
+    HttpStatus.CONFLICT,
+    'The character already has an active combat.',
+  );
+}
+
+export function combatNotFound(): CombatDomainError {
+  return new CombatDomainError(
+    'COMBAT_NOT_FOUND',
+    HttpStatus.NOT_FOUND,
+    'This combat could not be found.',
+  );
+}
+
+export function combatAlreadyFinished(): CombatDomainError {
+  return new CombatDomainError(
+    'COMBAT_ALREADY_FINISHED',
+    HttpStatus.CONFLICT,
+    'This combat has already finished.',
+  );
+}
+
+export function combatStateInvalid(): CombatDomainError {
+  return new CombatDomainError(
+    'COMBAT_STATE_INVALID',
+    HttpStatus.INTERNAL_SERVER_ERROR,
+    'The persisted combat references unavailable data.',
+  );
+}
+
+export { characterNotFound } from '../travel/travel.errors';

apps/api/src/combat/combat.module.ts

@@ -0,0 +1,27 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { CharactersModule } from '../characters/characters.module';
+import { Character } from '../characters/entities/character.entity';
+import { Hunt } from '../hunting/entities/hunt.entity';
+import { HuntEncounter } from '../hunting/entities/hunt-encounter.entity';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { RewardsModule } from '../rewards/rewards.module';
+import { TravelModule } from '../travel/travel.module';
+import { CombatEngineService } from './combat-engine.service';
+import { CombatController } from './combat.controller';
+import { CombatService } from './combat.service';
+import { Combat } from './entities/combat.entity';
+import { CombatEvent } from './entities/combat-event.entity';
+import { HuntEncounterAttackController } from './hunt-encounter-attack.controller';
+
+@Module({
+  imports: [
+    TypeOrmModule.forFeature([Character, Hunt, HuntEncounter, MonsterDefinition, Combat, CombatEvent]),
+    TravelModule,
+    CharactersModule,
+    RewardsModule,
+  ],
+  controllers: [CombatController, HuntEncounterAttackController],
+  providers: [CombatService, CombatEngineService],
+})
+export class CombatModule {}

apps/api/src/combat/combat.service.spec.ts

@@ -0,0 +1,964 @@
+import { DataSource, EntityManager, EntityTarget } from 'typeorm';
+import { CharacterCombatStatsService } from '../characters/character-combat-stats.service';
+import { Character } from '../characters/entities/character.entity';
+import { Hunt } from '../hunting/entities/hunt.entity';
+import { HuntEncounter } from '../hunting/entities/hunt-encounter.entity';
+import { HuntEncounterStatus } from '../hunting/hunt-encounter-status.enum';
+import { HuntStatus } from '../hunting/hunt-status.enum';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { CombatRewardService } from '../rewards/combat-reward.service';
+import { TravelService } from '../travel/travel.service';
+import { CombatAction } from './combat-action.enum';
+import { CombatEngineService } from './combat-engine.service';
+import { CombatDomainError } from './combat.errors';
+import { CombatService } from './combat.service';
+import { CombatStatus } from './combat-status.enum';
+import { CombatEvent } from './entities/combat-event.entity';
+import { Combat } from './entities/combat.entity';
+
+const CHARACTER_ID = '10000000-0000-4000-8000-000000000001';
+const OTHER_CHARACTER_ID = '10000000-0000-4000-8000-000000000002';
+const HUNT_ID = '20000000-0000-4000-8000-000000000001';
+const ENCOUNTER_ID = '30000000-0000-4000-8000-000000000001';
+const MONSTER_ID = '40000000-0000-4000-8000-000000000001';
+
+interface FakeState {
+  characters: Character[];
+  hunts: Hunt[];
+  huntEncounters: HuntEncounter[];
+  monsters: MonsterDefinition[];
+  combats: Combat[];
+  combatEvents: CombatEvent[];
+}
+
+class FakeRepository<T extends { id: string }> {
+  constructor(
+    private readonly state: FakeState,
+    private readonly target: EntityTarget<T>,
+    private readonly inTransaction: boolean,
+    private readonly dataSource: FakeDataSource,
+  ) {}
+
+  findOne(options: {
+    where: Partial<T>;
+    lock?: { mode: string };
+  }): Promise<T | null> {
+    if (options.lock) {
+      if (!this.inTransaction) {
+        throw new Error('Pessimistic locks require a transaction');
+      }
+      this.dataSource.locks.push({
+        target: this.target,
+        mode: options.lock.mode,
+      });
+    }
+    return Promise.resolve(
+      this.rows().find((row) => this.matches(row, options.where)) ?? null,
+    );
+  }
+
+  findOneBy(where: Partial<T>): Promise<T | null> {
+    return Promise.resolve(
+      this.rows().find((row) => this.matches(row, where)) ?? null,
+    );
+  }
+
+  find(options: {
+    where: Partial<T>;
+    order?: Partial<Record<keyof T, 'ASC' | 'DESC'>>;
+  }): Promise<T[]> {
+    const matched = this.rows().filter((row) =>
+      this.matches(row, options.where),
+    );
+    const orderKey = options.order
+      ? (Object.keys(options.order)[0] as keyof T)
+      : undefined;
+    if (orderKey) {
+      const direction = options.order![orderKey] === 'DESC' ? -1 : 1;
+      matched.sort((a, b) => {
+        if (a[orderKey] === b[orderKey]) return 0;
+        return a[orderKey] > b[orderKey] ? direction : -direction;
+      });
+    }
+    return Promise.resolve(matched);
+  }
+
+  count(options: { where: Partial<T> }): Promise<number> {
+    return Promise.resolve(
+      this.rows().filter((row) => this.matches(row, options.where)).length,
+    );
+  }
+
+  create(values: Partial<T>): T {
+    return { ...values } as T;
+  }
+
+  save(entity: T): Promise<T> {
+    if (!entity.id) {
+      entity.id = this.dataSource.nextId(this.targetName());
+    }
+    const rows = this.rows();
+    const index = rows.findIndex((row) => row.id === entity.id);
+    if (index === -1) {
+      rows.push(entity);
+    } else {
+      rows[index] = entity;
+    }
+    return Promise.resolve(entity);
+  }
+
+  private rows(): T[] {
+    if (this.target === Character) return this.state.characters as T[];
+    if (this.target === Hunt) return this.state.hunts as T[];
+    if (this.target === HuntEncounter) return this.state.huntEncounters as T[];
+    if (this.target === MonsterDefinition) return this.state.monsters as T[];
+    if (this.target === Combat) return this.state.combats as T[];
+    if (this.target === CombatEvent) return this.state.combatEvents as T[];
+    throw new Error(`Unsupported repository ${this.targetName()}`);
+  }
+
+  private matches(row: T, where: Partial<T>): boolean {
+    return Object.entries(where).every(
+      ([key, value]) => row[key as keyof T] === value,
+    );
+  }
+
+  private targetName(): string {
+    return typeof this.target === 'function'
+      ? this.target.name
+      : 'EntitySchema';
+  }
+}
+
+class FakeEntityManager {
+  constructor(
+    private readonly state: FakeState,
+    private readonly dataSource: FakeDataSource,
+  ) {}
+
+  getRepository<T extends { id: string }>(target: EntityTarget<T>) {
+    return new FakeRepository(this.state, target, true, this.dataSource);
+  }
+}
+
+class FakeDataSource {
+  readonly locks: Array<{ target: EntityTarget<unknown>; mode: string }> = [];
+  private readonly idCounters = new Map<string, number>();
+
+  constructor(public state: FakeState) {}
+
+  getRepository<T extends { id: string }>(target: EntityTarget<T>) {
+    return new FakeRepository(this.state, target, false, this);
+  }
+
+  async transaction<T>(
+    work: (manager: EntityManager) => Promise<T>,
+  ): Promise<T> {
+    const draft = structuredClone(this.state);
+    const result = await work(
+      new FakeEntityManager(draft, this) as unknown as EntityManager,
+    );
+    this.state = draft;
+    return result;
+  }
+
+  nextId(targetName: string): string {
+    const next = (this.idCounters.get(targetName) ?? 0) + 1;
+    this.idCounters.set(targetName, next);
+    return `${targetName.toLowerCase()}-generated-${next}`;
+  }
+}
+
+function character(overrides: Partial<Character> = {}): Character {
+  return {
+    id: CHARACTER_ID,
+    name: 'Aric Duskwalker',
+    level: 1,
+    experience: 0,
+    silver: 0,
+    baseHp: 100,
+    baseAttack: 6,
+    currentHp: 100,
+    currentLocationId: 'location-1',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as Character;
+}
+
+function monster(
+  overrides: Partial<MonsterDefinition> = {},
+): MonsterDefinition {
+  return {
+    id: MONSTER_ID,
+    key: 'ash-rat',
+    name: 'Aschenratte',
+    level: 1,
+    maxHp: 45,
+    attack: 5,
+    armor: 0,
+    experienceReward: 8,
+    silverMin: 4,
+    silverMax: 7,
+    artworkPath: '/images/monsters/ash-rat.png',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  };
+}
+
+function hunt(overrides: Partial<Hunt> = {}): Hunt {
+  return {
+    id: HUNT_ID,
+    characterId: CHARACTER_ID,
+    locationId: 'location-1',
+    status: HuntStatus.ACTIVE,
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as Hunt;
+}
+
+function huntEncounter(overrides: Partial<HuntEncounter> = {}): HuntEncounter {
+  return {
+    id: ENCOUNTER_ID,
+    huntId: HUNT_ID,
+    monsterDefinitionId: MONSTER_ID,
+    position: 0,
+    status: HuntEncounterStatus.AVAILABLE,
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as HuntEncounter;
+}
+
+function createState(overrides: Partial<FakeState> = {}): FakeState {
+  return {
+    characters: [character()],
+    hunts: [hunt()],
+    huntEncounters: [huntEncounter()],
+    monsters: [monster()],
+    combats: [],
+    combatEvents: [],
+    ...overrides,
+  };
+}
+
+function fakeTravelService(
+  status: 'IDLE' | 'TRAVELLING' = 'IDLE',
+): TravelService {
+  return {
+    completeTravelIfDue: jest.fn().mockResolvedValue({ status }),
+  } as unknown as TravelService;
+}
+
+function fakeRewardService(
+  overrides: Partial<{
+    grantVictoryRewards: jest.Mock;
+    loadRewards: jest.Mock;
+  }> = {},
+): CombatRewardService {
+  return {
+    grantVictoryRewards:
+      overrides.grantVictoryRewards ??
+      jest.fn().mockResolvedValue({ experience: 8, silver: 6, items: [] }),
+    loadRewards: overrides.loadRewards ?? jest.fn().mockResolvedValue(null),
+  } as unknown as CombatRewardService;
+}
+
+function createService(
+  options: { state?: FakeState; travelService?: TravelService } = {},
+) {
+  const state = options.state ?? createState();
+  const dataSource = new FakeDataSource(state);
+  const travelService = options.travelService ?? fakeTravelService();
+  const combatEngine = new CombatEngineService();
+  const characterCombatStats = new CharacterCombatStatsService();
+  const service = new CombatService(
+    dataSource as unknown as DataSource,
+    travelService,
+    combatEngine,
+    characterCombatStats,
+    fakeRewardService(),
+  );
+  return { dataSource, service, travelService };
+}
+
+async function expectCombatDomainError(
+  promise: Promise<unknown>,
+  code: string,
+): Promise<void> {
+  let error: unknown;
+  try {
+    await promise;
+  } catch (cause) {
+    error = cause;
+  }
+  expect(error).toBeInstanceOf(CombatDomainError);
+  if (!(error instanceof CombatDomainError)) {
+    throw new Error('Expected CombatDomainError');
+  }
+  expect(error.code).toBe(code);
+}
+
+describe('CombatService', () => {
+  describe('startCombat', () => {
+    it('starts an ACTIVE combat with snapshotted stats and full HP', async () => {
+      const { dataSource, service } = createService();
+
+      const combat = await service.startCombat(CHARACTER_ID, ENCOUNTER_ID);
+
+      expect(combat.status).toBe('ACTIVE');
+      expect(combat.round).toBe(1);
+      expect(combat.player).toEqual({
+        name: 'Aric Duskwalker',
+        maxHp: 100,
+        currentHp: 100,
+      });
+      expect(combat.monster).toEqual({
+        key: 'ash-rat',
+        name: 'Aschenratte',
+        level: 1,
+        maxHp: 45,
+        currentHp: 45,
+        artworkPath: '/images/monsters/ash-rat.png',
+      });
+      expect(combat.events).toEqual([]);
+      expect(dataSource.state.combats).toHaveLength(1);
+      expect(dataSource.state.combats[0]).toMatchObject({
+        characterId: CHARACTER_ID,
+        huntEncounterId: ENCOUNTER_ID,
+        monsterDefinitionId: MONSTER_ID,
+        status: CombatStatus.ACTIVE,
+        playerState: { attack: 6, weaponDamage: 8, armor: 6 },
+        monsterState: { attack: 5, armor: 0 },
+      });
+    });
+
+    it('marks the encounter as IN_PROGRESS', async () => {
+      const { dataSource, service } = createService();
+
+      await service.startCombat(CHARACTER_ID, ENCOUNTER_ID);
+
+      expect(dataSource.state.huntEncounters[0].status).toBe(
+        HuntEncounterStatus.IN_PROGRESS,
+      );
+    });
+
+    it('rejects an unknown encounter id', async () => {
+      const { service } = createService();
+
+      await expectCombatDomainError(
+        service.startCombat(CHARACTER_ID, 'unknown-id'),
+        'HUNT_ENCOUNTER_NOT_FOUND',
+      );
+    });
+
+    it('rejects an already-defeated encounter, and does not create a second combat', async () => {
+      const state = createState({
+        huntEncounters: [
+          huntEncounter({ status: HuntEncounterStatus.DEFEATED }),
+        ],
+      });
+      const { dataSource, service } = createService({ state });
+
+      await expectCombatDomainError(
+        service.startCombat(CHARACTER_ID, ENCOUNTER_ID),
+        'HUNT_ENCOUNTER_ALREADY_CONSUMED',
+      );
+      expect(dataSource.state.combats).toHaveLength(0);
+    });
+
+    it('rejects an encounter whose fight is still IN_PROGRESS', async () => {
+      const state = createState({
+        huntEncounters: [
+          huntEncounter({ status: HuntEncounterStatus.IN_PROGRESS }),
+        ],
+      });
+      const { dataSource, service } = createService({ state });
+
+      await expectCombatDomainError(
+        service.startCombat(CHARACTER_ID, ENCOUNTER_ID),
+        'HUNT_ENCOUNTER_ALREADY_CONSUMED',
+      );
+      expect(dataSource.state.combats).toHaveLength(0);
+    });
+
+    it('rejects an encounter belonging to a different character', async () => {
+      const state = createState({
+        characters: [character(), character({ id: OTHER_CHARACTER_ID })],
+      });
+      const { service } = createService({ state });
+
+      await expectCombatDomainError(
+        service.startCombat(OTHER_CHARACTER_ID, ENCOUNTER_ID),
+        'INVALID_HUNT_ENCOUNTER',
+      );
+    });
+
+    it('rejects an encounter whose hunt is no longer ACTIVE', async () => {
+      const state = createState({
+        hunts: [hunt({ status: HuntStatus.SUPERSEDED })],
+      });
+      const { service } = createService({ state });
+
+      await expectCombatDomainError(
+        service.startCombat(CHARACTER_ID, ENCOUNTER_ID),
+        'INVALID_HUNT_ENCOUNTER',
+      );
+    });
+
+    it('rejects starting combat while the character is travelling', async () => {
+      const { service } = createService({
+        travelService: fakeTravelService('TRAVELLING'),
+      });
+
+      await expectCombatDomainError(
+        service.startCombat(CHARACTER_ID, ENCOUNTER_ID),
+        'CHARACTER_TRAVELLING',
+      );
+    });
+
+    it('rejects starting a second combat while one is already ACTIVE', async () => {
+      const state = createState({
+        combats: [
+          {
+            id: 'combat-existing',
+            characterId: CHARACTER_ID,
+            huntEncounterId: 'other-encounter',
+            monsterDefinitionId: MONSTER_ID,
+            status: CombatStatus.ACTIVE,
+            round: 1,
+            playerMaxHp: 100,
+            playerCurrentHp: 100,
+            monsterMaxHp: 45,
+            monsterCurrentHp: 45,
+            playerState: { attack: 6, weaponDamage: 8, armor: 6 },
+            monsterState: { attack: 5, armor: 0 },
+            createdAt: new Date(),
+            updatedAt: new Date(),
+            completedAt: null,
+          } as Combat,
+        ],
+      });
+      const { service } = createService({ state });
+
+      await expectCombatDomainError(
+        service.startCombat(CHARACTER_ID, ENCOUNTER_ID),
+        'COMBAT_ALREADY_ACTIVE',
+      );
+    });
+
+    it('locks the character and the active-combat lookup', async () => {
+      const { dataSource, service } = createService();
+
+      await service.startCombat(CHARACTER_ID, ENCOUNTER_ID);
+
+      expect(dataSource.locks).toEqual(
+        expect.arrayContaining([
+          { target: Character, mode: 'pessimistic_write' },
+          { target: Combat, mode: 'pessimistic_write' },
+        ]),
+      );
+    });
+  });
+
+  describe('performAction', () => {
+    async function startedCombat(state = createState()) {
+      const context = createService({ state });
+      const combat = await context.service.startCombat(
+        CHARACTER_ID,
+        ENCOUNTER_ID,
+      );
+      return { ...context, combatId: combat.id };
+    }
+
+    it('resolves ATTACK, persists HP/round changes, and returns them', async () => {
+      const { dataSource, service, combatId } = await startedCombat();
+
+      const result = await service.performAction(
+        CHARACTER_ID,
+        combatId,
+        CombatAction.ATTACK,
+      );
+
+      expect(result.status).toBe('ACTIVE');
+      expect(result.round).toBe(2);
+      expect(result.monster.currentHp).toBe(45 - 14);
+      expect(result.player.currentHp).toBe(100 - 5);
+      expect(dataSource.state.combats[0].round).toBe(2);
+      expect(dataSource.state.combats[0].monsterCurrentHp).toBe(31);
+      expect(dataSource.state.combats[0].playerCurrentHp).toBe(95);
+    });
+
+    it('persists ordered, sequential CombatEvents across multiple rounds', async () => {
+      const { dataSource, service, combatId } = await startedCombat();
+
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+
+      const events = dataSource.state.combatEvents
+        .filter((event) => event.combatId === combatId)
+        .sort((a, b) => a.sequence - b.sequence);
+      expect(events.map((event) => event.sequence)).toEqual([1, 2, 3, 4]);
+      expect(events.map((event) => event.round)).toEqual([1, 1, 2, 2]);
+      expect(events[0]).toMatchObject({
+        source: 'PLAYER',
+        target: 'MONSTER',
+        type: 'DAMAGE',
+        amount: 14,
+      });
+      expect(events[1]).toMatchObject({
+        source: 'MONSTER',
+        target: 'PLAYER',
+        type: 'DAMAGE',
+        amount: 5,
+      });
+    });
+
+    it('ends the combat as WON, stops persisting new rounds, and rejects further actions', async () => {
+      const state = createState({ monsters: [monster({ maxHp: 10 })] });
+      const { dataSource, service, combatId } = await startedCombat(state);
+
+      const result = await service.performAction(
+        CHARACTER_ID,
+        combatId,
+        CombatAction.ATTACK,
+      );
+
+      expect(result.status).toBe('WON');
+      expect(dataSource.state.combats[0].completedAt).not.toBeNull();
+      await expectCombatDomainError(
+        service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK),
+        'COMBAT_ALREADY_FINISHED',
+      );
+    });
+
+    it('ends the combat as LOST, stops persisting new rounds, and rejects further actions', async () => {
+      const state = createState({
+        characters: [character({ baseHp: 1 })],
+      });
+      const { dataSource, service, combatId } = await startedCombat(state);
+
+      const result = await service.performAction(
+        CHARACTER_ID,
+        combatId,
+        CombatAction.ATTACK,
+      );
+
+      expect(result.status).toBe('LOST');
+      expect(dataSource.state.combats[0].status).toBe(CombatStatus.LOST);
+      expect(dataSource.state.combats[0].completedAt).not.toBeNull();
+      await expectCombatDomainError(
+        service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK),
+        'COMBAT_ALREADY_FINISHED',
+      );
+    });
+
+    it('marks the encounter DEFEATED when the fight is won', async () => {
+      const state = createState({ monsters: [monster({ maxHp: 10 })] });
+      const { dataSource, service, combatId } = await startedCombat(state);
+
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+
+      expect(dataSource.state.huntEncounters[0].status).toBe(
+        HuntEncounterStatus.DEFEATED,
+      );
+    });
+
+    it('frees the encounter for another attempt when the fight is lost', async () => {
+      const state = createState({ characters: [character({ baseHp: 1 })] });
+      const { dataSource, service, combatId } = await startedCombat(state);
+
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+
+      expect(dataSource.state.huntEncounters[0].status).toBe(
+        HuntEncounterStatus.AVAILABLE,
+      );
+    });
+
+    it('leaves the encounter IN_PROGRESS while the fight continues', async () => {
+      const { dataSource, service, combatId } = await startedCombat();
+
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+
+      expect(dataSource.state.huntEncounters[0].status).toBe(
+        HuntEncounterStatus.IN_PROGRESS,
+      );
+    });
+
+    it('lets a lost encounter be fought again as a fresh combat', async () => {
+      const state = createState({ characters: [character({ baseHp: 1 })] });
+      const { dataSource, service, combatId } = await startedCombat(state);
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+
+      const retry = await service.startCombat(CHARACTER_ID, ENCOUNTER_ID);
+
+      expect(retry.id).not.toBe(combatId);
+      expect(retry.status).toBe('ACTIVE');
+      expect(retry.round).toBe(1);
+      expect(retry.player.currentHp).toBe(retry.player.maxHp);
+      expect(dataSource.state.combats).toHaveLength(2);
+      expect(dataSource.state.huntEncounters[0].status).toBe(
+        HuntEncounterStatus.IN_PROGRESS,
+      );
+    });
+
+    it('rejects actions on an unknown combat id', async () => {
+      const { service } = createService();
+
+      await expectCombatDomainError(
+        service.performAction(
+          CHARACTER_ID,
+          'unknown-combat',
+          CombatAction.ATTACK,
+        ),
+        'COMBAT_NOT_FOUND',
+      );
+    });
+
+    it('rejects actions from a character who does not own the combat', async () => {
+      const state = createState({
+        characters: [character(), character({ id: OTHER_CHARACTER_ID })],
+      });
+      const { service, combatId } = await startedCombat(state);
+
+      await expectCombatDomainError(
+        service.performAction(
+          OTHER_CHARACTER_ID,
+          combatId,
+          CombatAction.ATTACK,
+        ),
+        'COMBAT_NOT_FOUND',
+      );
+    });
+
+    it('locks the combat row for the duration of the action', async () => {
+      const { dataSource, service, combatId } = await startedCombat();
+
+      await service.performAction(CHARACTER_ID, combatId, CombatAction.ATTACK);
+
+      expect(dataSource.locks).toEqual(
+        expect.arrayContaining([{ target: Combat, mode: 'pessimistic_write' }]),
+      );
+    });
+  });
+
+  describe('getCombat', () => {
+    it('returns the persisted state and ordered events after a refresh', async () => {
+      const context = createService();
+      const started = await context.service.startCombat(
+        CHARACTER_ID,
+        ENCOUNTER_ID,
+      );
+      await context.service.performAction(
+        CHARACTER_ID,
+        started.id,
+        CombatAction.ATTACK,
+      );
+
+      const reloaded = await context.service.getCombat(
+        CHARACTER_ID,
+        started.id,
+      );
+
+      expect(reloaded.round).toBe(2);
+      expect(reloaded.monster.currentHp).toBe(31);
+      expect(reloaded.events.map((event) => event.sequence)).toEqual([1, 2]);
+    });
+
+    it('rejects an unknown combat id', async () => {
+      const { service } = createService();
+
+      await expectCombatDomainError(
+        service.getCombat(CHARACTER_ID, 'unknown'),
+        'COMBAT_NOT_FOUND',
+      );
+    });
+
+    it('resolves the character ACTIVE combat so the hunt page can rejoin it', async () => {
+      const context = createService();
+      const started = await context.service.startCombat(
+        CHARACTER_ID,
+        ENCOUNTER_ID,
+      );
+      await context.service.performAction(
+        CHARACTER_ID,
+        started.id,
+        CombatAction.ATTACK,
+      );
+
+      const active = await context.service.getActiveCombat(CHARACTER_ID);
+
+      expect(active?.id).toBe(started.id);
+      expect(active?.status).toBe('ACTIVE');
+      expect(active?.round).toBe(2);
+    });
+
+    it('resolves null when the character has no ACTIVE combat', async () => {
+      const { service } = createService();
+
+      await expect(service.getActiveCombat(CHARACTER_ID)).resolves.toBeNull();
+    });
+
+    it('resolves null once the only combat has finished', async () => {
+      const state = createState({ monsters: [monster({ maxHp: 10 })] });
+      const context = createService({ state });
+      const started = await context.service.startCombat(
+        CHARACTER_ID,
+        ENCOUNTER_ID,
+      );
+      await context.service.performAction(
+        CHARACTER_ID,
+        started.id,
+        CombatAction.ATTACK,
+      );
+
+      await expect(
+        context.service.getActiveCombat(CHARACTER_ID),
+      ).resolves.toBeNull();
+    });
+
+    it('does not resolve another character ACTIVE combat', async () => {
+      const context = createService();
+      await context.service.startCombat(CHARACTER_ID, ENCOUNTER_ID);
+
+      await expect(
+        context.service.getActiveCombat(OTHER_CHARACTER_ID),
+      ).resolves.toBeNull();
+    });
+
+    it('keeps returning LOST after the combat has ended', async () => {
+      const state = createState({
+        characters: [character({ baseHp: 1 })],
+      });
+      const context = createService({ state });
+      const started = await context.service.startCombat(
+        CHARACTER_ID,
+        ENCOUNTER_ID,
+      );
+      await context.service.performAction(
+        CHARACTER_ID,
+        started.id,
+        CombatAction.ATTACK,
+      );
+
+      const reloaded = await context.service.getCombat(
+        CHARACTER_ID,
+        started.id,
+      );
+
+      expect(reloaded.status).toBe('LOST');
+      expect(reloaded.player.currentHp).toBe(0);
+    });
+  });
+
+  describe('rewards', () => {
+    it('grants rewards inside the same transaction when the round ends in victory', async () => {
+      const dataSource = new FakeDataSource(
+        createState({
+          combats: [
+            {
+              id: 'combat-1',
+              characterId: CHARACTER_ID,
+              huntEncounterId: ENCOUNTER_ID,
+              monsterDefinitionId: MONSTER_ID,
+              status: CombatStatus.ACTIVE,
+              round: 3,
+              playerMaxHp: 100,
+              playerCurrentHp: 80,
+              monsterMaxHp: 45,
+              monsterCurrentHp: 1,
+              playerState: { attack: 6, weaponDamage: 8, armor: 6 },
+              monsterState: { attack: 5, armor: 0 },
+              completedAt: null,
+            } as Combat,
+          ],
+        }),
+      );
+      const rewards = fakeRewardService({
+        grantVictoryRewards: jest.fn().mockResolvedValue({
+          experience: 8,
+          silver: 6,
+          items: [],
+        }),
+      });
+      const service = new CombatService(
+        dataSource as unknown as DataSource,
+        fakeTravelService(),
+        new CombatEngineService(),
+        new CharacterCombatStatsService(),
+        rewards,
+      );
+
+      const result = await service.performAction(CHARACTER_ID, 'combat-1', CombatAction.ATTACK);
+
+      expect(result.status).toBe(CombatStatus.WON);
+      expect(result.rewards).toEqual({ experience: 8, silver: 6, items: [] });
+      expect(rewards.grantVictoryRewards).toHaveBeenCalledTimes(1);
+      // The reward service must receive the transaction manager, not the data
+      // source: `expect.anything()` would pass even if the code handed over
+      // `this.dataSource`, so assert on the captured argument's identity.
+      const passedManager = (rewards.grantVictoryRewards as jest.Mock).mock
+        .calls[0][0];
+      expect(passedManager).not.toBe(dataSource);
+      expect(rewards.grantVictoryRewards).toHaveBeenCalledWith(
+        passedManager,
+        expect.objectContaining({ id: 'combat-1', status: CombatStatus.WON }),
+      );
+    });
+
+    it('grants no rewards when the round ends in defeat', async () => {
+      const dataSource = new FakeDataSource(
+        createState({
+          combats: [
+            {
+              id: 'combat-1',
+              characterId: CHARACTER_ID,
+              huntEncounterId: ENCOUNTER_ID,
+              monsterDefinitionId: MONSTER_ID,
+              status: CombatStatus.ACTIVE,
+              round: 3,
+              playerMaxHp: 100,
+              playerCurrentHp: 1,
+              monsterMaxHp: 45,
+              monsterCurrentHp: 45,
+              playerState: { attack: 1, weaponDamage: 1, armor: 0 },
+              monsterState: { attack: 99, armor: 99 },
+              completedAt: null,
+            } as Combat,
+          ],
+        }),
+      );
+      const rewards = fakeRewardService();
+      const service = new CombatService(
+        dataSource as unknown as DataSource,
+        fakeTravelService(),
+        new CombatEngineService(),
+        new CharacterCombatStatsService(),
+        rewards,
+      );
+
+      const result = await service.performAction(CHARACTER_ID, 'combat-1', CombatAction.ATTACK);
+
+      expect(result.status).toBe(CombatStatus.LOST);
+      expect(result.rewards).toBeNull();
+      expect(rewards.grantVictoryRewards).not.toHaveBeenCalled();
+    });
+
+    it('replays the persisted reward when a finished combat is read again', async () => {
+      const persisted = {
+        experience: 16,
+        silver: 12,
+        items: [
+          {
+            characterItemId: 'character-item-1',
+            item: {
+              key: 'bandit-blade',
+              name: 'Räuberklinge',
+              rarity: 'COMMON',
+              iconPath: '/images/items/bandit-blade.png',
+            },
+            quantity: 1,
+          },
+        ],
+      };
+      const dataSource = new FakeDataSource(
+        createState({
+          combats: [
+            {
+              id: 'combat-1',
+              characterId: CHARACTER_ID,
+              huntEncounterId: ENCOUNTER_ID,
+              monsterDefinitionId: MONSTER_ID,
+              status: CombatStatus.WON,
+              round: 5,
+              playerMaxHp: 100,
+              playerCurrentHp: 62,
+              monsterMaxHp: 45,
+              monsterCurrentHp: 0,
+              playerState: { attack: 6, weaponDamage: 8, armor: 6 },
+              monsterState: { attack: 5, armor: 0 },
+              completedAt: new Date('2026-08-19T09:00:00.000Z'),
+            } as Combat,
+          ],
+        }),
+      );
+      const rewards = fakeRewardService({
+        loadRewards: jest.fn().mockResolvedValue(persisted),
+        grantVictoryRewards: jest.fn(),
+      });
+      const service = new CombatService(
+        dataSource as unknown as DataSource,
+        fakeTravelService(),
+        new CombatEngineService(),
+        new CharacterCombatStatsService(),
+        rewards,
+      );
+
+      const result = await service.getCombat(CHARACTER_ID, 'combat-1');
+
+      expect(result.rewards).toEqual(persisted);
+      // Reading must never grant: only the ACTIVE -> WON transition does.
+      expect(rewards.grantVictoryRewards).not.toHaveBeenCalled();
+    });
+
+    it('persists nothing at all when reward resolution fails mid-transaction', async () => {
+      const dataSource = new FakeDataSource(
+        createState({
+          combats: [
+            {
+              id: 'combat-1',
+              characterId: CHARACTER_ID,
+              huntEncounterId: ENCOUNTER_ID,
+              monsterDefinitionId: MONSTER_ID,
+              status: CombatStatus.ACTIVE,
+              round: 3,
+              playerMaxHp: 100,
+              playerCurrentHp: 80,
+              monsterMaxHp: 45,
+              monsterCurrentHp: 1,
+              playerState: { attack: 6, weaponDamage: 8, armor: 6 },
+              monsterState: { attack: 5, armor: 0 },
+              completedAt: null,
+            } as Combat,
+          ],
+        }),
+      );
+      const service = new CombatService(
+        dataSource as unknown as DataSource,
+        fakeTravelService(),
+        new CombatEngineService(),
+        new CharacterCombatStatsService(),
+        fakeRewardService({
+          // Genuinely write XP/silver through the transaction's manager
+          // before failing, so the assertions below prove the rollback
+          // discards those writes rather than passing vacuously because
+          // nothing was ever written.
+          grantVictoryRewards: jest.fn().mockImplementation(async (manager: EntityManager) => {
+            const characters = manager.getRepository(Character);
+            const combatCharacter = await characters.findOneBy({
+              id: CHARACTER_ID,
+            });
+            if (combatCharacter) {
+              combatCharacter.experience += 8;
+              combatCharacter.silver += 6;
+              await characters.save(combatCharacter);
+            }
+            throw new Error('reward persistence failed');
+          }),
+        }),
+      );
+
+      await expect(
+        service.performAction(CHARACTER_ID, 'combat-1', CombatAction.ATTACK),
+      ).rejects.toThrow('reward persistence failed');
+
+      // The whole round rolled back: the combat is still ACTIVE and unmodified,
+      // so no half-granted state can survive.
+      expect(dataSource.state.combats[0].status).toBe(CombatStatus.ACTIVE);
+      expect(dataSource.state.combats[0].monsterCurrentHp).toBe(1);
+      expect(dataSource.state.combatEvents).toHaveLength(0);
+      expect(dataSource.state.characters[0].experience).toBe(0);
+      expect(dataSource.state.characters[0].silver).toBe(0);
+    });
+  });
+});

apps/api/src/combat/combat.service.ts

@@ -0,0 +1,409 @@
+import { Injectable } from '@nestjs/common';
+import { DataSource, Repository } from 'typeorm';
+import { CharacterCombatStatsService } from '../characters/character-combat-stats.service';
+import { Character } from '../characters/entities/character.entity';
+import { Hunt } from '../hunting/entities/hunt.entity';
+import { HuntEncounter } from '../hunting/entities/hunt-encounter.entity';
+import { HuntEncounterStatus } from '../hunting/hunt-encounter-status.enum';
+import { HuntStatus } from '../hunting/hunt-status.enum';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { CombatRewardService } from '../rewards/combat-reward.service';
+import type { CombatRewardDto } from '../rewards/combat-reward.service';
+import { TravelService } from '../travel/travel.service';
+import { TravelStatus } from '../travel/travel-status.enum';
+import { CombatAction } from './combat-action.enum';
+import { CombatEngineService } from './combat-engine.service';
+import { CombatEngineState } from './combat-engine.types';
+import {
+  characterNotFound,
+  characterTravelling,
+  combatAlreadyActive,
+  combatAlreadyFinished,
+  combatNotFound,
+  combatStateInvalid,
+  huntEncounterAlreadyConsumed,
+  huntEncounterNotFound,
+  invalidHuntEncounter,
+} from './combat.errors';
+import { CombatStatus } from './combat-status.enum';
+import { CombatEvent } from './entities/combat-event.entity';
+import { Combat } from './entities/combat.entity';
+
+export interface CombatPlayerDto {
+  name: string;
+  maxHp: number;
+  currentHp: number;
+}
+
+export interface CombatMonsterDto {
+  key: string;
+  name: string;
+  level: number;
+  maxHp: number;
+  currentHp: number;
+  artworkPath: string;
+}
+
+export interface CombatEventDto {
+  round: number;
+  sequence: number;
+  type: string;
+  source: string;
+  target: string;
+  amount?: number;
+}
+
+export interface CombatDto {
+  id: string;
+  status: CombatStatus;
+  round: number;
+  player: CombatPlayerDto;
+  monster: CombatMonsterDto;
+  events: CombatEventDto[];
+  rewards: CombatRewardDto | null;
+}
+
+@Injectable()
+export class CombatService {
+  constructor(
+    private readonly dataSource: DataSource,
+    private readonly travelService: TravelService,
+    private readonly combatEngine: CombatEngineService,
+    private readonly characterCombatStats: CharacterCombatStatsService,
+    private readonly combatRewards: CombatRewardService,
+  ) {}
+
+  async startCombat(
+    characterId: string,
+    encounterId: string,
+  ): Promise<CombatDto> {
+    const travel = await this.travelService.completeTravelIfDue(characterId);
+    if (travel.status === TravelStatus.TRAVELLING) {
+      throw characterTravelling();
+    }
+
+    return this.dataSource.transaction(async (manager) => {
+      const characters = manager.getRepository(Character);
+      const encounters = manager.getRepository(HuntEncounter);
+      const hunts = manager.getRepository(Hunt);
+      const monsters = manager.getRepository(MonsterDefinition);
+      const combats = manager.getRepository(Combat);
+
+      const character = await this.lockCharacter(characters, characterId);
+
+      const encounter = await encounters.findOne({
+        where: { id: encounterId },
+        lock: { mode: 'pessimistic_write' },
+      });
+      if (!encounter) {
+        throw huntEncounterNotFound();
+      }
+      if (encounter.status !== HuntEncounterStatus.AVAILABLE) {
+        throw huntEncounterAlreadyConsumed();
+      }
+
+      const hunt = await hunts.findOneBy({ id: encounter.huntId });
+      if (
+        !hunt ||
+        hunt.characterId !== characterId ||
+        hunt.status !== HuntStatus.ACTIVE
+      ) {
+        throw invalidHuntEncounter();
+      }
+
+      const existingActiveCombat = await combats.findOne({
+        where: { characterId, status: CombatStatus.ACTIVE },
+        lock: { mode: 'pessimistic_write' },
+      });
+      if (existingActiveCombat) {
+        throw combatAlreadyActive();
+      }
+
+      const monster = await monsters.findOneBy({
+        id: encounter.monsterDefinitionId,
+      });
+      if (!monster) {
+        throw invalidHuntEncounter();
+      }
+
+      const playerStats = this.characterCombatStats.getStats(character);
+
+      const combat = combats.create({
+        characterId,
+        huntEncounterId: encounter.id,
+        monsterDefinitionId: monster.id,
+        status: CombatStatus.ACTIVE,
+        round: 1,
+        playerMaxHp: playerStats.maxHp,
+        playerCurrentHp: playerStats.maxHp,
+        monsterMaxHp: monster.maxHp,
+        monsterCurrentHp: monster.maxHp,
+        playerState: {
+          attack: playerStats.attack,
+          weaponDamage: playerStats.weaponDamage,
+          armor: playerStats.armor,
+        },
+        monsterState: { attack: monster.attack, armor: monster.armor },
+        completedAt: null,
+      });
+      await combats.save(combat);
+
+      encounter.status = HuntEncounterStatus.IN_PROGRESS;
+      await encounters.save(encounter);
+
+      return this.toCombatDto(combat, character.name, monster, [], null);
+    });
+  }
+
+  async getCombat(characterId: string, combatId: string): Promise<CombatDto> {
+    const combats = this.dataSource.getRepository(Combat);
+    const combat = await combats.findOne({
+      where: { id: combatId, characterId },
+    });
+    if (!combat) {
+      throw combatNotFound();
+    }
+
+    const [character, monster, events, rewards] = await Promise.all([
+      this.loadCharacter(combat.characterId),
+      this.loadMonster(combat.monsterDefinitionId),
+      this.loadEvents(combat.id),
+      this.combatRewards.loadRewards(combat.id),
+    ]);
+
+    return this.toCombatDto(combat, character.name, monster, events, rewards);
+  }
+
+  async getActiveCombat(characterId: string): Promise<CombatDto | null> {
+    const combats = this.dataSource.getRepository(Combat);
+    const combat = await combats.findOne({
+      where: { characterId, status: CombatStatus.ACTIVE },
+    });
+    if (!combat) {
+      return null;
+    }
+
+    const [character, monster, events] = await Promise.all([
+      this.loadCharacter(combat.characterId),
+      this.loadMonster(combat.monsterDefinitionId),
+      this.loadEvents(combat.id),
+    ]);
+
+    return this.toCombatDto(combat, character.name, monster, events, null);
+  }
+
+  async performAction(
+    characterId: string,
+    combatId: string,
+    action: CombatAction,
+  ): Promise<CombatDto> {
+    return this.dataSource.transaction(async (manager) => {
+      const characters = manager.getRepository(Character);
+      const combats = manager.getRepository(Combat);
+      const combatEvents = manager.getRepository(CombatEvent);
+
+      // Lock the character before the combat row here, matching the order
+      // startCombat already uses (character, then combat). grantVictoryRewards
+      // locks the character again later in this same transaction, which is a
+      // no-op re-lock — but locking it first here keeps both code paths
+      // consistent and avoids a lock-order inversion that could deadlock two
+      // concurrent requests against the same character. Do not reorder this.
+      await this.lockCharacter(characters, characterId);
+
+      const combat = await combats.findOne({
+        where: { id: combatId, characterId },
+        lock: { mode: 'pessimistic_write' },
+      });
+      if (!combat) {
+        throw combatNotFound();
+      }
+      if (combat.status !== CombatStatus.ACTIVE) {
+        throw combatAlreadyFinished();
+      }
+
+      const actionRound = combat.round;
+      const engineState = this.toEngineState(combat);
+      const result = this.combatEngine.resolveAction(engineState, { action });
+
+      combat.round = result.state.round;
+      combat.status = result.state.status;
+      combat.playerCurrentHp = result.state.player.currentHp;
+      combat.monsterCurrentHp = result.state.monster.currentHp;
+      if (combat.status !== CombatStatus.ACTIVE) {
+        combat.completedAt = new Date();
+        await this.settleEncounter(
+          manager.getRepository(HuntEncounter),
+          combat.huntEncounterId,
+          combat.status,
+        );
+      }
+      await combats.save(combat);
+
+      const startingSequence = await combatEvents.count({
+        where: { combatId: combat.id },
+      });
+      for (let index = 0; index < result.events.length; index += 1) {
+        const event = result.events[index];
+        const entity = combatEvents.create({
+          combatId: combat.id,
+          round: actionRound,
+          sequence: startingSequence + index + 1,
+          type: event.type,
+          source: event.source,
+          target: event.target,
+          amount: event.amount ?? null,
+        });
+        await combatEvents.save(entity);
+      }
+
+      // The engine decided the outcome; rewards are resolved here, outside it
+      // (spec §30). Running inside this transaction means a reward failure
+      // rolls the whole round back rather than leaving a half-granted victory.
+      const rewards =
+        combat.status === CombatStatus.WON
+          ? await this.combatRewards.grantVictoryRewards(manager, combat)
+          : null;
+
+      const [character, monster, events] = await Promise.all([
+        this.loadCharacter(
+          combat.characterId,
+          manager.getRepository(Character),
+        ),
+        this.loadMonster(
+          combat.monsterDefinitionId,
+          manager.getRepository(MonsterDefinition),
+        ),
+        this.loadEvents(combat.id, combatEvents),
+      ]);
+
+      return this.toCombatDto(combat, character.name, monster, events, rewards);
+    });
+  }
+
+  /**
+   * Records the fight's outcome on the encounter that spawned it. A win
+   * retires the encounter; a loss hands it back so the player can try again.
+   */
+  private async settleEncounter(
+    encounters: Repository<HuntEncounter>,
+    encounterId: string,
+    outcome: CombatStatus,
+  ): Promise<void> {
+    const encounter = await encounters.findOneBy({ id: encounterId });
+    if (!encounter) {
+      // combats.hunt_encounter_id is a RESTRICT FK; guaranteed to exist.
+      throw combatStateInvalid();
+    }
+
+    encounter.status =
+      outcome === CombatStatus.WON
+        ? HuntEncounterStatus.DEFEATED
+        : HuntEncounterStatus.AVAILABLE;
+    await encounters.save(encounter);
+  }
+
+  private async lockCharacter(
+    characters: Repository<Character>,
+    characterId: string,
+  ): Promise<Character> {
+    const character = await characters.findOne({
+      where: { id: characterId },
+      lock: { mode: 'pessimistic_write' },
+    });
+    if (!character) {
+      throw characterNotFound();
+    }
+    return character;
+  }
+
+  private async loadCharacter(
+    characterId: string,
+    repo?: Repository<Character>,
+  ): Promise<Character> {
+    const characters = repo ?? this.dataSource.getRepository(Character);
+    const character = await characters.findOneBy({ id: characterId });
+    if (!character) {
+      // combats.character_id is a RESTRICT FK; a persisted combat's
+      // character is guaranteed to exist.
+      throw combatStateInvalid();
+    }
+    return character;
+  }
+
+  private async loadMonster(
+    monsterId: string,
+    repo?: Repository<MonsterDefinition>,
+  ): Promise<MonsterDefinition> {
+    const monsters = repo ?? this.dataSource.getRepository(MonsterDefinition);
+    const monster = await monsters.findOneBy({ id: monsterId });
+    if (!monster) {
+      // combats.monster_definition_id is a RESTRICT FK; guaranteed to exist.
+      throw combatStateInvalid();
+    }
+    return monster;
+  }
+
+  private loadEvents(
+    combatId: string,
+    repo?: Repository<CombatEvent>,
+  ): Promise<CombatEvent[]> {
+    const combatEvents = repo ?? this.dataSource.getRepository(CombatEvent);
+    return combatEvents.find({
+      where: { combatId },
+      order: { sequence: 'ASC' },
+    });
+  }
+
+  private toEngineState(combat: Combat): CombatEngineState {
+    return {
+      status: combat.status,
+      round: combat.round,
+      player: {
+        currentHp: combat.playerCurrentHp,
+        maxHp: combat.playerMaxHp,
+        stats: combat.playerState,
+      },
+      monster: {
+        currentHp: combat.monsterCurrentHp,
+        maxHp: combat.monsterMaxHp,
+        stats: combat.monsterState,
+      },
+    };
+  }
+
+  private toCombatDto(
+    combat: Combat,
+    playerName: string,
+    monster: MonsterDefinition,
+    events: CombatEvent[],
+    rewards: CombatRewardDto | null,
+  ): CombatDto {
+    return {
+      id: combat.id,
+      status: combat.status,
+      round: combat.round,
+      player: {
+        name: playerName,
+        maxHp: combat.playerMaxHp,
+        currentHp: combat.playerCurrentHp,
+      },
+      monster: {
+        key: monster.key,
+        name: monster.name,
+        level: monster.level,
+        maxHp: combat.monsterMaxHp,
+        currentHp: combat.monsterCurrentHp,
+        artworkPath: monster.artworkPath,
+      },
+      events: events.map((event) => ({
+        round: event.round,
+        sequence: event.sequence,
+        type: event.type,
+        source: event.source,
+        target: event.target,
+        amount: event.amount ?? undefined,
+      })),
+      rewards,
+    };
+  }
+}

apps/api/src/combat/combatant.enum.ts

@@ -0,0 +1,4 @@
+export enum Combatant {
+  PLAYER = 'PLAYER',
+  MONSTER = 'MONSTER',
+}

apps/api/src/combat/dto/combat-action.dto.ts

@@ -0,0 +1,7 @@
+import { IsEnum } from 'class-validator';
+import { CombatAction } from '../combat-action.enum';
+
+export class CombatActionDto {
+  @IsEnum(CombatAction)
+  action!: CombatAction;
+}

apps/api/src/combat/entities/combat-event.entity.ts

@@ -0,0 +1,62 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { Combatant } from '../combatant.enum';
+import { CombatEventType } from '../combat-event-type.enum';
+import { Combat } from './combat.entity';
+
+@Entity({ name: 'combat_events' })
+@Index('IDX_combat_events_combat_sequence', ['combatId', 'sequence'], { unique: true })
+export class CombatEvent {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'combat_id', type: 'uuid' })
+  combatId!: string;
+
+  @Column({ name: 'round', type: 'integer' })
+  round!: number;
+
+  @Column({ name: 'sequence', type: 'integer' })
+  sequence!: number;
+
+  @Column({
+    name: 'type',
+    type: 'enum',
+    enum: CombatEventType,
+    enumName: 'combat_event_type_enum',
+  })
+  type!: CombatEventType;
+
+  @Column({
+    name: 'source',
+    type: 'enum',
+    enum: Combatant,
+    enumName: 'combatant_enum',
+  })
+  source!: Combatant;
+
+  @Column({
+    name: 'target',
+    type: 'enum',
+    enum: Combatant,
+    enumName: 'combatant_enum',
+  })
+  target!: Combatant;
+
+  @Column({ name: 'amount', type: 'integer', nullable: true })
+  amount!: number | null;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @ManyToOne(() => Combat, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'combat_id' })
+  combat!: Combat;
+}

apps/api/src/combat/entities/combat.entity.ts

@@ -0,0 +1,91 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { HuntEncounter } from '../../hunting/entities/hunt-encounter.entity';
+import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { CombatStatus } from '../combat-status.enum';
+
+export interface CombatCombatantState {
+  attack: number;
+  armor: number;
+}
+
+export interface CombatPlayerState extends CombatCombatantState {
+  weaponDamage: number;
+}
+
+@Entity({ name: 'combats' })
+// Deliberately not unique: a lost fight frees the encounter to be retried,
+// which creates a second combat row for the same encounter.
+@Index('IDX_combats_hunt_encounter', ['huntEncounterId'])
+export class Combat {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'character_id', type: 'uuid' })
+  characterId!: string;
+
+  @Column({ name: 'hunt_encounter_id', type: 'uuid' })
+  huntEncounterId!: string;
+
+  @Column({ name: 'monster_definition_id', type: 'uuid' })
+  monsterDefinitionId!: string;
+
+  @Column({
+    name: 'status',
+    type: 'enum',
+    enum: CombatStatus,
+    enumName: 'combat_status_enum',
+  })
+  status!: CombatStatus;
+
+  @Column({ name: 'round', type: 'integer' })
+  round!: number;
+
+  @Column({ name: 'player_max_hp', type: 'integer' })
+  playerMaxHp!: number;
+
+  @Column({ name: 'player_current_hp', type: 'integer' })
+  playerCurrentHp!: number;
+
+  @Column({ name: 'monster_max_hp', type: 'integer' })
+  monsterMaxHp!: number;
+
+  @Column({ name: 'monster_current_hp', type: 'integer' })
+  monsterCurrentHp!: number;
+
+  @Column({ name: 'player_state', type: 'jsonb' })
+  playerState!: CombatPlayerState;
+
+  @Column({ name: 'monster_state', type: 'jsonb' })
+  monsterState!: CombatCombatantState;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+
+  @Column({ name: 'completed_at', type: 'timestamptz', nullable: true })
+  completedAt!: Date | null;
+
+  @ManyToOne(() => Character, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'character_id' })
+  character!: Character;
+
+  @ManyToOne(() => HuntEncounter, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'hunt_encounter_id' })
+  huntEncounter!: HuntEncounter;
+
+  @ManyToOne(() => MonsterDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'monster_definition_id' })
+  monster!: MonsterDefinition;
+}

apps/api/src/combat/hunt-encounter-attack.controller.spec.ts

@@ -0,0 +1,41 @@
+import { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { configureApplication } from '../app.config';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { CombatService } from './combat.service';
+import { HuntEncounterAttackController } from './hunt-encounter-attack.controller';
+
+describe('HuntEncounterAttackController', () => {
+  let app: INestApplication<App>;
+  const startCombat = jest.fn();
+
+  beforeEach(async () => {
+    startCombat.mockReset();
+    const module = await Test.createTestingModule({
+      controllers: [HuntEncounterAttackController],
+      providers: [{ provide: CombatService, useValue: { startCombat } }],
+    }).compile();
+
+    app = module.createNestApplication<App>();
+    configureApplication(app);
+    await app.init();
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+
+  it('delegates to combatService.startCombat with the demo character id and the encounter id', async () => {
+    const combat = { id: 'combat-1', status: 'ACTIVE', round: 1, player: {}, monster: {}, events: [], rewards: null };
+    startCombat.mockResolvedValue(combat);
+
+    const response = await request(app.getHttpServer())
+      .post('/api/hunt-encounters/encounter-1/attack')
+      .expect(201);
+
+    expect(startCombat).toHaveBeenCalledWith(DEMO_CHARACTER_ID, 'encounter-1');
+    expect(response.body).toEqual(combat);
+  });
+});

apps/api/src/combat/hunt-encounter-attack.controller.ts

@@ -0,0 +1,13 @@
+import { Controller, Param, Post } from '@nestjs/common';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { CombatService } from './combat.service';
+
+@Controller('hunt-encounters')
+export class HuntEncounterAttackController {
+  constructor(private readonly combatService: CombatService) {}
+
+  @Post(':encounterId/attack')
+  attack(@Param('encounterId') encounterId: string) {
+    return this.combatService.startCombat(DEMO_CHARACTER_ID, encounterId);
+  }
+}

apps/api/src/config/database.config.spec.ts

@@ -0,0 +1,18 @@
+import { createDatabaseConfig } from './database.config';
+
+describe('createDatabaseConfig', () => {
+  it('uses postgres and permanently disables synchronization', () => {
+    expect(
+      createDatabaseConfig('postgresql://test:test@localhost/test'),
+    ).toMatchObject({
+      type: 'postgres',
+      url: 'postgresql://test:test@localhost/test',
+      synchronize: false,
+      autoLoadEntities: true,
+    });
+  });
+
+  it('rejects an empty database URL', () => {
+    expect(() => createDatabaseConfig('')).toThrow('DATABASE_URL is required');
+  });
+});

apps/api/src/config/database.config.ts

@@ -0,0 +1,16 @@
+import { TypeOrmModuleOptions } from '@nestjs/typeorm';
+
+export function createDatabaseConfig(
+  databaseUrl: string,
+): TypeOrmModuleOptions {
+  if (!databaseUrl.trim()) {
+    throw new Error('DATABASE_URL is required');
+  }
+
+  return {
+    type: 'postgres',
+    url: databaseUrl,
+    autoLoadEntities: true,
+    synchronize: false,
+  };
+}

apps/api/src/database/data-source.ts

@@ -0,0 +1,24 @@
+import { config } from 'dotenv';
+import { resolve } from 'path';
+import { DataSource } from 'typeorm';
+
+// npm workspace scripts (`db:migrate`, `db:seed`) run with this file's
+// workspace (`apps/api`) as the current working directory, not the repo
+// root where the documented `.env` lives. Resolve it explicitly so the
+// documented `npm run db:migrate` / `npm run db:seed` flow works regardless
+// of the caller's working directory.
+config({ path: resolve(__dirname, '../../../../.env') });
+
+const databaseUrl = process.env.DATABASE_URL;
+
+if (!databaseUrl?.trim()) {
+  throw new Error('DATABASE_URL is required');
+}
+
+export const AppDataSource = new DataSource({
+  type: 'postgres',
+  url: databaseUrl,
+  entities: [__dirname + '/../**/*.entity.{ts,js}'],
+  migrations: [__dirname + '/migrations/[0-9]*.{ts,js}'],
+  synchronize: false,
+});

apps/api/src/database/database.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { createDatabaseConfig } from '../config/database.config';
+
+@Module({
+  imports: [
+    TypeOrmModule.forRootAsync({
+      useFactory: () => createDatabaseConfig(process.env.DATABASE_URL ?? ''),
+    }),
+  ],
+})
+export class DatabaseModule {}

apps/api/src/database/migrations/1787072400000-CreateVisibleVerticalSlice.ts

@@ -0,0 +1,111 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class CreateVisibleVerticalSlice1787072400000 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`CREATE TABLE "location_definitions" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "key" character varying(100) NOT NULL,
+      "name" character varying(150) NOT NULL,
+      "description" text NOT NULL,
+      "region_key" character varying(100) NOT NULL,
+      "min_recommended_level" integer NOT NULL,
+      "max_recommended_level" integer NOT NULL,
+      "danger_level" integer NOT NULL,
+      "is_safe" boolean NOT NULL,
+      "hunting_enabled" boolean NOT NULL,
+      "artwork_path" character varying(255) NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_location_definitions" PRIMARY KEY ("id")
+    )`);
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_location_definitions_key" ON "location_definitions" ("key")',
+    );
+    await queryRunner.query(`CREATE TABLE "characters" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "name" character varying(150) NOT NULL,
+      "level" integer NOT NULL,
+      "experience" integer NOT NULL,
+      "base_hp" integer NOT NULL,
+      "base_attack" integer NOT NULL,
+      "current_hp" integer NOT NULL,
+      "current_location_id" uuid NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_characters" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_characters_current_location" FOREIGN KEY ("current_location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_characters_current_location" ON "characters" ("current_location_id")',
+    );
+    await queryRunner.query(`CREATE TABLE "location_connections" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "from_location_id" uuid NOT NULL,
+      "to_location_id" uuid NOT NULL,
+      "travel_duration_seconds" integer NOT NULL,
+      "ambush_chance" numeric(5,4) NOT NULL,
+      "enabled" boolean NOT NULL,
+      CONSTRAINT "PK_location_connections" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_location_connections_from_location" FOREIGN KEY ("from_location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_location_connections_to_location" FOREIGN KEY ("to_location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(`CREATE UNIQUE INDEX "IDX_location_connection_direction"
+      ON "location_connections" ("from_location_id", "to_location_id")`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_location_connections_from_location" ON "location_connections" ("from_location_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_location_connections_to_location" ON "location_connections" ("to_location_id")',
+    );
+    await queryRunner.query(
+      "CREATE TYPE \"travel_status_enum\" AS ENUM ('TRAVELLING', 'COMPLETED')",
+    );
+    await queryRunner.query(`CREATE TABLE "travels" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "character_id" uuid NOT NULL,
+      "origin_location_id" uuid NOT NULL,
+      "target_location_id" uuid NOT NULL,
+      "started_at" TIMESTAMP WITH TIME ZONE NOT NULL,
+      "arrives_at" TIMESTAMP WITH TIME ZONE NOT NULL,
+      "status" "travel_status_enum" NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_travels" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_travels_character" FOREIGN KEY ("character_id") REFERENCES "characters"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_travels_origin_location" FOREIGN KEY ("origin_location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_travels_target_location" FOREIGN KEY ("target_location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_travels_character" ON "travels" ("character_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_travels_origin_location" ON "travels" ("origin_location_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_travels_target_location" ON "travels" ("target_location_id")',
+    );
+    await queryRunner.query(`CREATE UNIQUE INDEX "IDX_active_travel_per_character"
+      ON "travels" ("character_id")
+      WHERE "status" = 'TRAVELLING'`);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query('DROP INDEX "IDX_active_travel_per_character"');
+    await queryRunner.query('DROP INDEX "IDX_travels_target_location"');
+    await queryRunner.query('DROP INDEX "IDX_travels_origin_location"');
+    await queryRunner.query('DROP INDEX "IDX_travels_character"');
+    await queryRunner.query('DROP TABLE "travels"');
+    await queryRunner.query(
+      'DROP INDEX "IDX_location_connections_to_location"',
+    );
+    await queryRunner.query(
+      'DROP INDEX "IDX_location_connections_from_location"',
+    );
+    await queryRunner.query('DROP INDEX "IDX_location_connection_direction"');
+    await queryRunner.query('DROP TABLE "location_connections"');
+    await queryRunner.query('DROP INDEX "IDX_characters_current_location"');
+    await queryRunner.query('DROP TABLE "characters"');
+    await queryRunner.query('DROP INDEX "IDX_location_definitions_key"');
+    await queryRunner.query('DROP TABLE "location_definitions"');
+    await queryRunner.query('DROP TYPE "travel_status_enum"');
+  }
+}

apps/api/src/database/migrations/1787500000000-CreateHuntingSystem.ts

@@ -0,0 +1,107 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class CreateHuntingSystem1787500000000 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`CREATE TABLE "monster_definitions" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "key" character varying(100) NOT NULL,
+      "name" character varying(150) NOT NULL,
+      "level" integer NOT NULL,
+      "max_hp" integer NOT NULL,
+      "attack" integer NOT NULL,
+      "armor" integer NOT NULL,
+      "experience_reward" integer NOT NULL,
+      "silver_min" integer NOT NULL,
+      "silver_max" integer NOT NULL,
+      "artwork_path" character varying(255) NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_monster_definitions" PRIMARY KEY ("id")
+    )`);
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_monster_definitions_key" ON "monster_definitions" ("key")',
+    );
+    await queryRunner.query(
+      "CREATE TYPE \"location_monster_encounter_type_enum\" AS ENUM ('NORMAL', 'RARE', 'ELITE', 'BOSS')",
+    );
+    await queryRunner.query(`CREATE TABLE "location_monsters" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "location_id" uuid NOT NULL,
+      "monster_id" uuid NOT NULL,
+      "weight" integer NOT NULL,
+      "encounter_type" "location_monster_encounter_type_enum" NOT NULL DEFAULT 'NORMAL',
+      "enabled" boolean NOT NULL DEFAULT true,
+      CONSTRAINT "PK_location_monsters" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_location_monsters_location" FOREIGN KEY ("location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_location_monsters_monster" FOREIGN KEY ("monster_id") REFERENCES "monster_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_location_monsters_location" ON "location_monsters" ("location_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_location_monsters_monster" ON "location_monsters" ("monster_id")',
+    );
+    await queryRunner.query(`CREATE UNIQUE INDEX "IDX_location_monsters_location_monster"
+      ON "location_monsters" ("location_id", "monster_id")`);
+    await queryRunner.query(
+      "CREATE TYPE \"hunt_status_enum\" AS ENUM ('ACTIVE', 'SUPERSEDED')",
+    );
+    await queryRunner.query(`CREATE TABLE "hunts" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "character_id" uuid NOT NULL,
+      "location_id" uuid NOT NULL,
+      "status" "hunt_status_enum" NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_hunts" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_hunts_character" FOREIGN KEY ("character_id") REFERENCES "characters"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_hunts_location" FOREIGN KEY ("location_id") REFERENCES "location_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_hunts_character" ON "hunts" ("character_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_hunts_location" ON "hunts" ("location_id")',
+    );
+    await queryRunner.query(`CREATE UNIQUE INDEX "IDX_active_hunt_per_character"
+      ON "hunts" ("character_id")
+      WHERE "status" = 'ACTIVE'`);
+    await queryRunner.query(`CREATE TABLE "hunt_encounters" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "hunt_id" uuid NOT NULL,
+      "monster_definition_id" uuid NOT NULL,
+      "position" integer NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_hunt_encounters" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_hunt_encounters_hunt" FOREIGN KEY ("hunt_id") REFERENCES "hunts"("id") ON DELETE CASCADE ON UPDATE NO ACTION,
+      CONSTRAINT "FK_hunt_encounters_monster_definition" FOREIGN KEY ("monster_definition_id") REFERENCES "monster_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_hunt_encounters_hunt" ON "hunt_encounters" ("hunt_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_hunt_encounters_monster_definition" ON "hunt_encounters" ("monster_definition_id")',
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      'DROP INDEX "IDX_hunt_encounters_monster_definition"',
+    );
+    await queryRunner.query('DROP INDEX "IDX_hunt_encounters_hunt"');
+    await queryRunner.query('DROP TABLE "hunt_encounters"');
+    await queryRunner.query('DROP INDEX "IDX_active_hunt_per_character"');
+    await queryRunner.query('DROP INDEX "IDX_hunts_location"');
+    await queryRunner.query('DROP INDEX "IDX_hunts_character"');
+    await queryRunner.query('DROP TABLE "hunts"');
+    await queryRunner.query('DROP TYPE "hunt_status_enum"');
+    await queryRunner.query(
+      'DROP INDEX "IDX_location_monsters_location_monster"',
+    );
+    await queryRunner.query('DROP INDEX "IDX_location_monsters_monster"');
+    await queryRunner.query('DROP INDEX "IDX_location_monsters_location"');
+    await queryRunner.query('DROP TABLE "location_monsters"');
+    await queryRunner.query('DROP TYPE "location_monster_encounter_type_enum"');
+    await queryRunner.query('DROP INDEX "IDX_monster_definitions_key"');
+    await queryRunner.query('DROP TABLE "monster_definitions"');
+  }
+}

apps/api/src/database/migrations/1788100000000-CreateCombatSystem.ts

@@ -0,0 +1,89 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class CreateCombatSystem1788100000000 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      'ALTER TABLE "hunt_encounters" ADD COLUMN "consumed_at" TIMESTAMP WITH TIME ZONE',
+    );
+
+    await queryRunner.query(
+      "CREATE TYPE \"combat_status_enum\" AS ENUM ('ACTIVE', 'WON', 'LOST')",
+    );
+    await queryRunner.query(
+      "CREATE TYPE \"combat_event_type_enum\" AS ENUM ('DAMAGE', 'COMBAT_WON', 'COMBAT_LOST')",
+    );
+    await queryRunner.query(
+      "CREATE TYPE \"combatant_enum\" AS ENUM ('PLAYER', 'MONSTER')",
+    );
+
+    await queryRunner.query(`CREATE TABLE "combats" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "character_id" uuid NOT NULL,
+      "hunt_encounter_id" uuid NOT NULL,
+      "monster_definition_id" uuid NOT NULL,
+      "status" "combat_status_enum" NOT NULL,
+      "round" integer NOT NULL,
+      "player_max_hp" integer NOT NULL,
+      "player_current_hp" integer NOT NULL,
+      "monster_max_hp" integer NOT NULL,
+      "monster_current_hp" integer NOT NULL,
+      "player_state" jsonb NOT NULL,
+      "monster_state" jsonb NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "completed_at" TIMESTAMP WITH TIME ZONE,
+      CONSTRAINT "PK_combats" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_combats_character" FOREIGN KEY ("character_id") REFERENCES "characters"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_combats_hunt_encounter" FOREIGN KEY ("hunt_encounter_id") REFERENCES "hunt_encounters"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_combats_monster_definition" FOREIGN KEY ("monster_definition_id") REFERENCES "monster_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_combats_character" ON "combats" ("character_id")',
+    );
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_combats_hunt_encounter" ON "combats" ("hunt_encounter_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_combats_monster_definition" ON "combats" ("monster_definition_id")',
+    );
+    await queryRunner.query(`CREATE UNIQUE INDEX "IDX_active_combat_per_character"
+      ON "combats" ("character_id")
+      WHERE "status" = 'ACTIVE'`);
+
+    await queryRunner.query(`CREATE TABLE "combat_events" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "combat_id" uuid NOT NULL,
+      "round" integer NOT NULL,
+      "sequence" integer NOT NULL,
+      "type" "combat_event_type_enum" NOT NULL,
+      "source" "combatant_enum" NOT NULL,
+      "target" "combatant_enum" NOT NULL,
+      "amount" integer,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_combat_events" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_combat_events_combat" FOREIGN KEY ("combat_id") REFERENCES "combats"("id") ON DELETE CASCADE ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_combat_events_combat" ON "combat_events" ("combat_id")',
+    );
+    await queryRunner.query(`CREATE UNIQUE INDEX "IDX_combat_events_combat_sequence"
+      ON "combat_events" ("combat_id", "sequence")`);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query('DROP INDEX "IDX_combat_events_combat_sequence"');
+    await queryRunner.query('DROP INDEX "IDX_combat_events_combat"');
+    await queryRunner.query('DROP TABLE "combat_events"');
+    await queryRunner.query('DROP INDEX "IDX_active_combat_per_character"');
+    await queryRunner.query('DROP INDEX "IDX_combats_monster_definition"');
+    await queryRunner.query('DROP INDEX "IDX_combats_hunt_encounter"');
+    await queryRunner.query('DROP INDEX "IDX_combats_character"');
+    await queryRunner.query('DROP TABLE "combats"');
+    await queryRunner.query('DROP TYPE "combatant_enum"');
+    await queryRunner.query('DROP TYPE "combat_event_type_enum"');
+    await queryRunner.query('DROP TYPE "combat_status_enum"');
+    await queryRunner.query(
+      'ALTER TABLE "hunt_encounters" DROP COLUMN "consumed_at"',
+    );
+  }
+}

apps/api/src/database/migrations/1788200000000-AddHuntEncounterStatus.ts

@@ -0,0 +1,54 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddHuntEncounterStatus1788200000000 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      "CREATE TYPE \"hunt_encounter_status_enum\" AS ENUM ('AVAILABLE', 'IN_PROGRESS', 'DEFEATED')",
+    );
+    await queryRunner.query(`ALTER TABLE "hunt_encounters"
+      ADD COLUMN "status" "hunt_encounter_status_enum" NOT NULL DEFAULT 'AVAILABLE'`);
+
+    // consumed_at only recorded that a fight had started, so the outcome has
+    // to be read off the combat it spawned. The unique index this migration
+    // drops guarantees at most one such combat per encounter.
+    await queryRunner.query(`UPDATE "hunt_encounters" AS "encounter"
+      SET "status" = CASE "combat"."status"
+        WHEN 'WON' THEN 'DEFEATED'::"hunt_encounter_status_enum"
+        WHEN 'ACTIVE' THEN 'IN_PROGRESS'::"hunt_encounter_status_enum"
+        ELSE 'AVAILABLE'::"hunt_encounter_status_enum"
+      END
+      FROM "combats" AS "combat"
+      WHERE "combat"."hunt_encounter_id" = "encounter"."id"`);
+
+    await queryRunner.query(
+      'ALTER TABLE "hunt_encounters" DROP COLUMN "consumed_at"',
+    );
+
+    // A retried encounter gets a second combat row, so the index that kept
+    // them one-to-one has to go; one ACTIVE combat per character is still
+    // enforced by IDX_active_combat_per_character.
+    await queryRunner.query('DROP INDEX "IDX_combats_hunt_encounter"');
+    await queryRunner.query(
+      'CREATE INDEX "IDX_combats_hunt_encounter" ON "combats" ("hunt_encounter_id")',
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query('DROP INDEX "IDX_combats_hunt_encounter"');
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_combats_hunt_encounter" ON "combats" ("hunt_encounter_id")',
+    );
+
+    await queryRunner.query(
+      'ALTER TABLE "hunt_encounters" ADD COLUMN "consumed_at" TIMESTAMP WITH TIME ZONE',
+    );
+    await queryRunner.query(`UPDATE "hunt_encounters"
+      SET "consumed_at" = now()
+      WHERE "status" <> 'AVAILABLE'`);
+
+    await queryRunner.query(
+      'ALTER TABLE "hunt_encounters" DROP COLUMN "status"',
+    );
+    await queryRunner.query('DROP TYPE "hunt_encounter_status_enum"');
+  }
+}

apps/api/src/database/migrations/1788600000000-CreateLootAndRewards.ts

@@ -0,0 +1,174 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class CreateLootAndRewards1788600000000 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    // Existing characters keep their progression; silver simply starts at 0.
+    await queryRunner.query(
+      'ALTER TABLE "characters" ADD COLUMN "silver" integer NOT NULL DEFAULT 0',
+    );
+
+    await queryRunner.query(
+      "CREATE TYPE \"item_type_enum\" AS ENUM ('WEAPON', 'ARMOR', 'MATERIAL', 'CONSUMABLE')",
+    );
+    await queryRunner.query(
+      "CREATE TYPE \"equipment_slot_enum\" AS ENUM ('WEAPON', 'HEAD', 'CHEST', 'HANDS', 'LEGS', 'FEET', 'AMULET')",
+    );
+    await queryRunner.query(
+      "CREATE TYPE \"item_rarity_enum\" AS ENUM ('COMMON', 'RARE', 'EPIC')",
+    );
+
+    await queryRunner.query(`CREATE TABLE "item_definitions" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "key" character varying(100) NOT NULL,
+      "name" character varying(150) NOT NULL,
+      "description" text NOT NULL,
+      "type" "item_type_enum" NOT NULL,
+      "equipment_slot" "equipment_slot_enum",
+      "rarity" "item_rarity_enum" NOT NULL,
+      "tier" integer NOT NULL,
+      "required_level" integer NOT NULL,
+      "weapon_damage" integer NOT NULL DEFAULT 0,
+      "bonus_hp" integer NOT NULL DEFAULT 0,
+      "bonus_attack" integer NOT NULL DEFAULT 0,
+      "bonus_armor" integer NOT NULL DEFAULT 0,
+      "sell_price" integer NOT NULL DEFAULT 0,
+      "icon_path" character varying(255) NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_item_definitions" PRIMARY KEY ("id")
+    )`);
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_item_definitions_key" ON "item_definitions" ("key")',
+    );
+
+    await queryRunner.query(`CREATE TABLE "loot_tables" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "key" character varying(100) NOT NULL,
+      "name" character varying(150) NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_loot_tables" PRIMARY KEY ("id")
+    )`);
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_loot_tables_key" ON "loot_tables" ("key")',
+    );
+
+    await queryRunner.query(`CREATE TABLE "loot_table_entries" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "loot_table_id" uuid NOT NULL,
+      "item_definition_id" uuid NOT NULL,
+      "position" integer NOT NULL,
+      "drop_chance" numeric(5,4) NOT NULL,
+      "min_quantity" integer NOT NULL DEFAULT 1,
+      "max_quantity" integer NOT NULL DEFAULT 1,
+      "enabled" boolean NOT NULL DEFAULT true,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_loot_table_entries" PRIMARY KEY ("id"),
+      CONSTRAINT "CHK_loot_table_entries_drop_chance" CHECK ("drop_chance" >= 0 AND "drop_chance" <= 1),
+      CONSTRAINT "CHK_loot_table_entries_quantity" CHECK ("min_quantity" >= 1 AND "max_quantity" >= "min_quantity"),
+      CONSTRAINT "FK_loot_table_entries_loot_table" FOREIGN KEY ("loot_table_id") REFERENCES "loot_tables"("id") ON DELETE CASCADE ON UPDATE NO ACTION,
+      CONSTRAINT "FK_loot_table_entries_item_definition" FOREIGN KEY ("item_definition_id") REFERENCES "item_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_loot_table_entries_table_position" ON "loot_table_entries" ("loot_table_id", "position")',
+    );
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_loot_table_entries_table_item" ON "loot_table_entries" ("loot_table_id", "item_definition_id")',
+    );
+
+    await queryRunner.query(
+      'ALTER TABLE "monster_definitions" ADD COLUMN "loot_table_id" uuid',
+    );
+    await queryRunner.query(
+      'ALTER TABLE "monster_definitions" ADD CONSTRAINT "FK_monster_definitions_loot_table" FOREIGN KEY ("loot_table_id") REFERENCES "loot_tables"("id") ON DELETE RESTRICT ON UPDATE NO ACTION',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_monster_definitions_loot_table" ON "monster_definitions" ("loot_table_id")',
+    );
+
+    await queryRunner.query(`CREATE TABLE "character_items" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "character_id" uuid NOT NULL,
+      "item_definition_id" uuid NOT NULL,
+      "quantity" integer NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_character_items" PRIMARY KEY ("id"),
+      CONSTRAINT "CHK_character_items_quantity" CHECK ("quantity" >= 1),
+      CONSTRAINT "FK_character_items_character" FOREIGN KEY ("character_id") REFERENCES "characters"("id") ON DELETE CASCADE ON UPDATE NO ACTION,
+      CONSTRAINT "FK_character_items_item_definition" FOREIGN KEY ("item_definition_id") REFERENCES "item_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_character_items_character_item" ON "character_items" ("character_id", "item_definition_id")',
+    );
+
+    await queryRunner.query(`CREATE TABLE "combat_rewards" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "combat_id" uuid NOT NULL,
+      "character_id" uuid NOT NULL,
+      "experience_granted" integer NOT NULL,
+      "silver_granted" integer NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_combat_rewards" PRIMARY KEY ("id"),
+      CONSTRAINT "FK_combat_rewards_combat" FOREIGN KEY ("combat_id") REFERENCES "combats"("id") ON DELETE CASCADE ON UPDATE NO ACTION,
+      CONSTRAINT "FK_combat_rewards_character" FOREIGN KEY ("character_id") REFERENCES "characters"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    // The database half of the "one reward per combat" invariant (spec §7).
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_combat_rewards_combat" ON "combat_rewards" ("combat_id")',
+    );
+    await queryRunner.query(
+      'CREATE INDEX "IDX_combat_rewards_character" ON "combat_rewards" ("character_id")',
+    );
+
+    await queryRunner.query(`CREATE TABLE "combat_reward_items" (
+      "id" uuid NOT NULL DEFAULT gen_random_uuid(),
+      "combat_reward_id" uuid NOT NULL,
+      "character_item_id" uuid NOT NULL,
+      "item_definition_id" uuid NOT NULL,
+      "quantity" integer NOT NULL,
+      "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+      CONSTRAINT "PK_combat_reward_items" PRIMARY KEY ("id"),
+      CONSTRAINT "CHK_combat_reward_items_quantity" CHECK ("quantity" >= 1),
+      CONSTRAINT "FK_combat_reward_items_reward" FOREIGN KEY ("combat_reward_id") REFERENCES "combat_rewards"("id") ON DELETE CASCADE ON UPDATE NO ACTION,
+      CONSTRAINT "FK_combat_reward_items_character_item" FOREIGN KEY ("character_item_id") REFERENCES "character_items"("id") ON DELETE RESTRICT ON UPDATE NO ACTION,
+      CONSTRAINT "FK_combat_reward_items_item_definition" FOREIGN KEY ("item_definition_id") REFERENCES "item_definitions"("id") ON DELETE RESTRICT ON UPDATE NO ACTION
+    )`);
+    await queryRunner.query(
+      'CREATE INDEX "IDX_combat_reward_items_reward" ON "combat_reward_items" ("combat_reward_id")',
+    );
+    await queryRunner.query(
+      'CREATE UNIQUE INDEX "IDX_combat_reward_items_reward_item" ON "combat_reward_items" ("combat_reward_id", "item_definition_id")',
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query('DROP INDEX "IDX_combat_reward_items_reward_item"');
+    await queryRunner.query('DROP INDEX "IDX_combat_reward_items_reward"');
+    await queryRunner.query('DROP TABLE "combat_reward_items"');
+    await queryRunner.query('DROP INDEX "IDX_combat_rewards_character"');
+    await queryRunner.query('DROP INDEX "IDX_combat_rewards_combat"');
+    await queryRunner.query('DROP TABLE "combat_rewards"');
+    await queryRunner.query('DROP INDEX "IDX_character_items_character_item"');
+    await queryRunner.query('DROP TABLE "character_items"');
+    await queryRunner.query('DROP INDEX "IDX_monster_definitions_loot_table"');
+    await queryRunner.query(
+      'ALTER TABLE "monster_definitions" DROP CONSTRAINT "FK_monster_definitions_loot_table"',
+    );
+    await queryRunner.query(
+      'ALTER TABLE "monster_definitions" DROP COLUMN "loot_table_id"',
+    );
+    await queryRunner.query('DROP INDEX "IDX_loot_table_entries_table_item"');
+    await queryRunner.query('DROP INDEX "IDX_loot_table_entries_table_position"');
+    await queryRunner.query('DROP TABLE "loot_table_entries"');
+    await queryRunner.query('DROP INDEX "IDX_loot_tables_key"');
+    await queryRunner.query('DROP TABLE "loot_tables"');
+    await queryRunner.query('DROP INDEX "IDX_item_definitions_key"');
+    await queryRunner.query('DROP TABLE "item_definitions"');
+    await queryRunner.query('DROP TYPE "item_rarity_enum"');
+    await queryRunner.query('DROP TYPE "equipment_slot_enum"');
+    await queryRunner.query('DROP TYPE "item_type_enum"');
+    await queryRunner.query('ALTER TABLE "characters" DROP COLUMN "silver"');
+  }
+}

apps/api/src/database/migrations/combat-system.migration.spec.ts

@@ -0,0 +1,43 @@
+import 'reflect-metadata';
+import { getMetadataArgsStorage } from 'typeorm';
+import { Combat } from '../../combat/entities/combat.entity';
+import { CombatEvent } from '../../combat/entities/combat-event.entity';
+
+describe('combat system schema', () => {
+  it('maps Combat and CombatEvent relations with the documented onDelete behavior', () => {
+    const metadata = getMetadataArgsStorage();
+
+    const relations = metadata.relations.filter(
+      (relation) => relation.target === Combat || relation.target === CombatEvent,
+    );
+
+    expect(
+      relations.map((relation) => ({
+        onDelete: relation.options.onDelete,
+        propertyName: relation.propertyName,
+        target: relation.target,
+      })),
+    ).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'character', target: Combat }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'huntEncounter', target: Combat }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'monster', target: Combat }),
+        expect.objectContaining({ onDelete: 'CASCADE', propertyName: 'combat', target: CombatEvent }),
+      ]),
+    );
+  });
+
+  it('enforces ordered, unique event sequencing per combat', () => {
+    const metadata = getMetadataArgsStorage();
+    const index = metadata.indices.find(
+      (candidate) =>
+        candidate.target === CombatEvent &&
+        candidate.columns?.includes('combatId') &&
+        candidate.columns?.includes('sequence'),
+    );
+
+    expect(index).toBeDefined();
+    const indexMetadata = index as typeof index & { options?: { unique?: boolean }; unique?: boolean };
+    expect(indexMetadata?.options?.unique ?? indexMetadata?.unique).toBe(true);
+  });
+});

apps/api/src/database/migrations/encounter-status.migration.spec.ts

@@ -0,0 +1,49 @@
+import 'reflect-metadata';
+import { getMetadataArgsStorage } from 'typeorm';
+import { Combat } from '../../combat/entities/combat.entity';
+import { HuntEncounter } from '../../hunting/entities/hunt-encounter.entity';
+import { HuntEncounterStatus } from '../../hunting/hunt-encounter-status.enum';
+
+describe('encounter status schema', () => {
+  it('stores the encounter status as a non-nullable enum on hunt_encounters', () => {
+    const metadata = getMetadataArgsStorage();
+    const column = metadata.columns.find(
+      (candidate) =>
+        candidate.target === HuntEncounter &&
+        candidate.propertyName === 'status',
+    );
+
+    expect(column).toBeDefined();
+    expect(column?.options.type).toBe('enum');
+    expect(column?.options.enum).toBe(HuntEncounterStatus);
+    expect(column?.options.enumName).toBe('hunt_encounter_status_enum');
+    expect(column?.options.nullable).toBeFalsy();
+  });
+
+  it('drops consumedAt, whose gate the encounter status replaces', () => {
+    const metadata = getMetadataArgsStorage();
+    const column = metadata.columns.find(
+      (candidate) =>
+        candidate.target === HuntEncounter &&
+        candidate.propertyName === 'consumedAt',
+    );
+
+    expect(column).toBeUndefined();
+  });
+
+  it('allows repeated combats per encounter so a lost fight can be retried', () => {
+    const metadata = getMetadataArgsStorage();
+    const index = metadata.indices.find(
+      (candidate) =>
+        candidate.target === Combat &&
+        candidate.columns?.includes('huntEncounterId'),
+    );
+
+    expect(index).toBeDefined();
+    const indexMetadata = index as typeof index & {
+      options?: { unique?: boolean };
+      unique?: boolean;
+    };
+    expect(indexMetadata?.options?.unique ?? indexMetadata?.unique).toBeFalsy();
+  });
+});

apps/api/src/database/migrations/hunting-system.migration.spec.ts

@@ -0,0 +1,98 @@
+import 'reflect-metadata';
+import { getMetadataArgsStorage } from 'typeorm';
+import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { LocationMonster } from '../../monsters/entities/location-monster.entity';
+import { Hunt } from '../../hunting/entities/hunt.entity';
+import { HuntEncounter } from '../../hunting/entities/hunt-encounter.entity';
+
+describe('hunting system schema', () => {
+  it('maps the monster definition key index and relationship foreign keys explicitly', () => {
+    const metadata = getMetadataArgsStorage();
+    const monsterKeyIndex = metadata.indices.find((index) => {
+      const metadataIndex = index as typeof index & {
+        options?: { unique?: boolean };
+        unique?: boolean;
+      };
+
+      return (
+        index.target === MonsterDefinition &&
+        index.columns?.includes('key') &&
+        (metadataIndex.options?.unique ?? metadataIndex.unique) === true
+      );
+    });
+
+    expect(monsterKeyIndex).toBeDefined();
+
+    const relations = metadata.relations.filter((relation) =>
+      [LocationMonster, Hunt, HuntEncounter].includes(
+        relation.target as typeof LocationMonster,
+      ),
+    );
+    const joinColumns = metadata.joinColumns
+      .filter((joinColumn) =>
+        [LocationMonster, Hunt, HuntEncounter].includes(
+          joinColumn.target as typeof LocationMonster,
+        ),
+      )
+      .map((joinColumn) => joinColumn.name);
+
+    expect(joinColumns).toEqual(
+      expect.arrayContaining([
+        'location_id',
+        'monster_id',
+        'character_id',
+        'location_id',
+        'hunt_id',
+        'monster_definition_id',
+      ]),
+    );
+
+    expect(
+      relations.map((relation) => ({
+        onDelete: relation.options.onDelete,
+        propertyName: relation.propertyName,
+        target: relation.target,
+      })),
+    ).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'location',
+          target: LocationMonster,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'monster',
+          target: LocationMonster,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'character',
+          target: Hunt,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'location',
+          target: Hunt,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'monster',
+          target: HuntEncounter,
+        }),
+      ]),
+    );
+
+    // Deliberate deviation from the codebase's usual RESTRICT: HuntEncounter
+    // rows are owned/composed by their parent Hunt and must be removed along
+    // with it, so this relation uses CASCADE. Asserted explicitly so a
+    // future refactor can't silently change it.
+    const huntEncounterToHunt = relations.find(
+      (relation) =>
+        relation.target === HuntEncounter && relation.propertyName === 'hunt',
+    );
+
+    expect(huntEncounterToHunt).toBeDefined();
+    expect(huntEncounterToHunt?.options.onDelete).toBe('CASCADE');
+  });
+});

apps/api/src/database/migrations/loot-and-rewards.migration.spec.ts

@@ -0,0 +1,147 @@
+import 'reflect-metadata';
+import { getMetadataArgsStorage, QueryRunner } from 'typeorm';
+import { CreateLootAndRewards1788600000000 } from './1788600000000-CreateLootAndRewards';
+import { Character } from '../../characters/entities/character.entity';
+import { CharacterItem } from '../../items/entities/character-item.entity';
+import { ItemDefinition } from '../../items/entities/item-definition.entity';
+import { LootTable } from '../../loot/entities/loot-table.entity';
+import { LootTableEntry } from '../../loot/entities/loot-table-entry.entity';
+import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { CombatReward } from '../../rewards/entities/combat-reward.entity';
+import { CombatRewardItem } from '../../rewards/entities/combat-reward-item.entity';
+
+function uniqueIndexFor(target: unknown, columns: string[]) {
+  const index = getMetadataArgsStorage().indices.find(
+    (candidate) =>
+      candidate.target === target &&
+      columns.every((column) => candidate.columns?.includes(column)),
+  );
+  const indexMetadata = index as typeof index & {
+    options?: { unique?: boolean };
+    unique?: boolean;
+  };
+  return indexMetadata?.options?.unique ?? indexMetadata?.unique;
+}
+
+describe('loot and rewards schema', () => {
+  it('gives every combat at most one reward record', () => {
+    expect(uniqueIndexFor(CombatReward, ['combatId'])).toBe(true);
+  });
+
+  it('keeps one stack per character per item definition', () => {
+    expect(uniqueIndexFor(CharacterItem, ['characterId', 'itemDefinitionId'])).toBe(true);
+  });
+
+  it('keeps loot-table content keys and entry positions unique', () => {
+    expect(uniqueIndexFor(ItemDefinition, ['key'])).toBe(true);
+    expect(uniqueIndexFor(LootTable, ['key'])).toBe(true);
+    expect(uniqueIndexFor(LootTableEntry, ['lootTableId', 'position'])).toBe(true);
+    expect(uniqueIndexFor(LootTableEntry, ['lootTableId', 'itemDefinitionId'])).toBe(true);
+  });
+
+  it('maps reward and loot relations with the documented onDelete behavior', () => {
+    const relations = getMetadataArgsStorage().relations.filter((relation) =>
+      [CombatReward, CombatRewardItem, CharacterItem, LootTableEntry, MonsterDefinition].includes(
+        relation.target as never,
+      ),
+    );
+
+    expect(
+      relations.map((relation) => ({
+        onDelete: relation.options.onDelete,
+        propertyName: relation.propertyName,
+        target: relation.target,
+      })),
+    ).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ onDelete: 'CASCADE', propertyName: 'combat', target: CombatReward }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'character', target: CombatReward }),
+        expect.objectContaining({ onDelete: 'CASCADE', propertyName: 'combatReward', target: CombatRewardItem }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'characterItem', target: CombatRewardItem }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'itemDefinition', target: CombatRewardItem }),
+        expect.objectContaining({ onDelete: 'CASCADE', propertyName: 'character', target: CharacterItem }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'itemDefinition', target: CharacterItem }),
+        expect.objectContaining({ onDelete: 'CASCADE', propertyName: 'lootTable', target: LootTableEntry }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'itemDefinition', target: LootTableEntry }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'lootTable', target: MonsterDefinition }),
+      ]),
+    );
+  });
+
+  it('adds the character silver column and the nullable monster loot table link', () => {
+    const columns = getMetadataArgsStorage().columns;
+
+    const silver = columns.find(
+      (candidate) => candidate.target === Character && candidate.propertyName === 'silver',
+    );
+    expect(silver).toBeDefined();
+    expect(silver?.options.type).toBe('integer');
+
+    const lootTableId = columns.find(
+      (candidate) =>
+        candidate.target === MonsterDefinition && candidate.propertyName === 'lootTableId',
+    );
+    expect(lootTableId).toBeDefined();
+    expect(lootTableId?.options.nullable).toBe(true);
+  });
+
+  it('stores drop chance as a numeric column so probabilities stay data-driven', () => {
+    const dropChance = getMetadataArgsStorage().columns.find(
+      (candidate) =>
+        candidate.target === LootTableEntry && candidate.propertyName === 'dropChance',
+    );
+
+    expect(dropChance?.options.type).toBe('numeric');
+    expect(dropChance?.options.precision).toBe(5);
+    expect(dropChance?.options.scale).toBe(4);
+  });
+
+  it('emits the real SQL that enforces the schema invariants, not just entity decorators', async () => {
+    // synchronize: false means entity decorators never touch the real database -
+    // only the raw SQL emitted by the migration itself does. Assert on that SQL
+    // directly so deleting a constraint here would fail this test.
+    const query = jest.fn().mockResolvedValue(undefined);
+    const queryRunner = { query } as unknown as QueryRunner;
+    const migration = new CreateLootAndRewards1788600000000();
+
+    await migration.up(queryRunner);
+
+    const upQueries = query.mock.calls.map(([sql]) => sql as string);
+
+    expect(upQueries).toEqual(
+      expect.arrayContaining([
+        // The database half of the "one reward per combat" invariant (spec §7, §37).
+        expect.stringContaining('CREATE UNIQUE INDEX "IDX_combat_rewards_combat"'),
+        expect.stringContaining('CREATE UNIQUE INDEX "IDX_character_items_character_item"'),
+        expect.stringContaining('CREATE UNIQUE INDEX "IDX_combat_reward_items_reward_item"'),
+        expect.stringContaining('ALTER TABLE "characters" ADD COLUMN "silver"'),
+        expect.stringContaining('ALTER TABLE "monster_definitions" ADD COLUMN "loot_table_id"'),
+      ]),
+    );
+
+    const checkConstraints = upQueries.filter((sql) => sql.includes('CHECK ('));
+    expect(checkConstraints.length).toBeGreaterThan(0);
+    expect(
+      checkConstraints.some(
+        (sql) =>
+          sql.includes('CHK_loot_table_entries_drop_chance') ||
+          sql.includes('CHK_character_items_quantity'),
+      ),
+    ).toBe(true);
+
+    await migration.down(queryRunner);
+
+    const downQueries = query.mock.calls
+      .slice(upQueries.length)
+      .map(([sql]) => sql as string);
+
+    // Proves down() is real and reverses the up() migration, not a no-op.
+    expect(downQueries).toEqual(
+      expect.arrayContaining([
+        expect.stringContaining('DROP TABLE "combat_rewards"'),
+        expect.stringContaining('DROP TABLE "character_items"'),
+        'ALTER TABLE "characters" DROP COLUMN "silver"',
+      ]),
+    );
+  });
+});

apps/api/src/database/migrations/visible-vertical-slice.migration.spec.ts

@@ -0,0 +1,231 @@
+import 'reflect-metadata';
+import { getMetadataArgsStorage, QueryRunner } from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { CreateVisibleVerticalSlice1787072400000 } from './1787072400000-CreateVisibleVerticalSlice';
+import { Travel } from '../../travel/entities/travel.entity';
+import { LocationConnection } from '../../world/entities/location-connection.entity';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+
+describe('visible vertical slice schema', () => {
+  it('maps the location key and relationship foreign keys explicitly', () => {
+    const metadata = getMetadataArgsStorage();
+    const locationIndex = metadata.indices.find((index) => {
+      const metadataIndex = index as typeof index & {
+        options?: { unique?: boolean };
+        unique?: boolean;
+      };
+
+      return (
+        index.target === LocationDefinition &&
+        index.columns?.includes('key') &&
+        (metadataIndex.options?.unique ?? metadataIndex.unique) === true
+      );
+    });
+
+    expect(locationIndex).toBeDefined();
+
+    const relations = metadata.relations.filter((relation) =>
+      [Character, LocationConnection, Travel].includes(
+        relation.target as typeof Character,
+      ),
+    );
+    const joinColumns = metadata.joinColumns
+      .filter((joinColumn) =>
+        [Character, LocationConnection, Travel].includes(
+          joinColumn.target as typeof Character,
+        ),
+      )
+      .map((joinColumn) => joinColumn.name);
+
+    expect(joinColumns).toEqual(
+      expect.arrayContaining([
+        'current_location_id',
+        'from_location_id',
+        'to_location_id',
+        'character_id',
+        'origin_location_id',
+        'target_location_id',
+      ]),
+    );
+
+    expect(
+      relations.map((relation) => ({
+        onDelete: relation.options.onDelete,
+        propertyName: relation.propertyName,
+        target: relation.target,
+      })),
+    ).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'currentLocation',
+          target: Character,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'fromLocation',
+          target: LocationConnection,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'toLocation',
+          target: LocationConnection,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'character',
+          target: Travel,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'originLocation',
+          target: Travel,
+        }),
+        expect.objectContaining({
+          onDelete: 'RESTRICT',
+          propertyName: 'targetLocation',
+          target: Travel,
+        }),
+      ]),
+    );
+  });
+
+  it('emits reversible SQL in dependency order without extension ownership', async () => {
+    const query = jest.fn().mockResolvedValue(undefined);
+    const queryRunner = { query } as unknown as QueryRunner;
+    const migration = new CreateVisibleVerticalSlice1787072400000();
+
+    await migration.up(queryRunner);
+
+    const upQueries = query.mock.calls.map(([sql]) => sql as string);
+
+    expect(upQueries).toHaveLength(14);
+    expect(
+      upQueries.map((sql) => {
+        if (sql.includes('CREATE TABLE "location_definitions"')) {
+          return 'create location definitions';
+        }
+        if (sql.includes('IDX_location_definitions_key')) {
+          return 'create location key index';
+        }
+        if (sql.includes('CREATE TABLE "characters"')) {
+          return 'create characters';
+        }
+        if (sql.includes('IDX_characters_current_location')) {
+          return 'create character location index';
+        }
+        if (sql.includes('CREATE TABLE "location_connections"')) {
+          return 'create location connections';
+        }
+        if (sql.includes('IDX_location_connection_direction')) {
+          return 'create connection direction index';
+        }
+        if (sql.includes('IDX_location_connections_from_location')) {
+          return 'create connection origin index';
+        }
+        if (sql.includes('IDX_location_connections_to_location')) {
+          return 'create connection target index';
+        }
+        if (sql.includes('CREATE TYPE "travel_status_enum"')) {
+          return 'create travel status enum';
+        }
+        if (sql.includes('CREATE TABLE "travels"')) {
+          return 'create travels';
+        }
+        if (sql.includes('IDX_travels_character')) {
+          return 'create travel character index';
+        }
+        if (sql.includes('IDX_travels_origin_location')) {
+          return 'create travel origin index';
+        }
+        if (sql.includes('IDX_travels_target_location')) {
+          return 'create travel target index';
+        }
+        if (sql.includes('IDX_active_travel_per_character')) {
+          return 'create active travel index';
+        }
+
+        return 'unexpected query';
+      }),
+    ).toEqual([
+      'create location definitions',
+      'create location key index',
+      'create characters',
+      'create character location index',
+      'create location connections',
+      'create connection direction index',
+      'create connection origin index',
+      'create connection target index',
+      'create travel status enum',
+      'create travels',
+      'create travel character index',
+      'create travel origin index',
+      'create travel target index',
+      'create active travel index',
+    ]);
+    expect(upQueries).toEqual(
+      expect.arrayContaining([
+        expect.stringContaining('CREATE TABLE "location_definitions"'),
+        expect.stringContaining('CREATE TABLE "characters"'),
+        expect.stringContaining('CREATE TABLE "location_connections"'),
+        expect.stringContaining('CREATE TABLE "travels"'),
+        expect.stringContaining(
+          'CREATE UNIQUE INDEX "IDX_location_connection_direction"',
+        ),
+        expect.stringContaining(
+          'CREATE UNIQUE INDEX "IDX_active_travel_per_character"',
+        ),
+        expect.stringContaining('WHERE "status" = \'TRAVELLING\''),
+      ]),
+    );
+    expect(upQueries[0]).toContain('CREATE TABLE "location_definitions"');
+    expect(upQueries).not.toEqual(
+      expect.arrayContaining([expect.stringContaining('CREATE EXTENSION')]),
+    );
+    expect(upQueries).not.toEqual(
+      expect.arrayContaining([expect.stringContaining('uuid_generate_v4')]),
+    );
+    const tableQueries = upQueries.filter((sql) =>
+      sql.includes('CREATE TABLE'),
+    );
+    expect(tableQueries).toHaveLength(4);
+    expect(
+      tableQueries.every((sql) => sql.includes('DEFAULT gen_random_uuid()')),
+    ).toBe(true);
+    const foreignKeySql = upQueries
+      .filter((sql) => sql.includes('ON DELETE RESTRICT'))
+      .join('\n');
+    expect(
+      upQueries.filter((sql) => sql.includes('ON DELETE RESTRICT')),
+    ).toHaveLength(3);
+    expect(foreignKeySql).toContain('FK_characters_current_location');
+    expect(foreignKeySql).toContain('FK_location_connections_from_location');
+    expect(foreignKeySql).toContain('FK_location_connections_to_location');
+    expect(foreignKeySql).toContain('FK_travels_character');
+    expect(foreignKeySql).toContain('FK_travels_origin_location');
+    expect(foreignKeySql).toContain('FK_travels_target_location');
+
+    await migration.down(queryRunner);
+
+    const downQueries = query.mock.calls
+      .slice(upQueries.length)
+      .map(([sql]) => sql as string);
+
+    expect(downQueries).toEqual([
+      'DROP INDEX "IDX_active_travel_per_character"',
+      'DROP INDEX "IDX_travels_target_location"',
+      'DROP INDEX "IDX_travels_origin_location"',
+      'DROP INDEX "IDX_travels_character"',
+      'DROP TABLE "travels"',
+      'DROP INDEX "IDX_location_connections_to_location"',
+      'DROP INDEX "IDX_location_connections_from_location"',
+      'DROP INDEX "IDX_location_connection_direction"',
+      'DROP TABLE "location_connections"',
+      'DROP INDEX "IDX_characters_current_location"',
+      'DROP TABLE "characters"',
+      'DROP INDEX "IDX_location_definitions_key"',
+      'DROP TABLE "location_definitions"',
+      'DROP TYPE "travel_status_enum"',
+    ]);
+  });
+});

apps/api/src/database/seeds/item-content.ts

@@ -0,0 +1,216 @@
+import { EquipmentSlot } from '../../items/equipment-slot.enum';
+import { ItemRarity } from '../../items/item-rarity.enum';
+import { ItemType } from '../../items/item-type.enum';
+import {
+  ASH_RAT_LOOT_TABLE_ID,
+  ITEM_IDS,
+  ItemKey,
+  ROAD_BANDIT_LOOT_TABLE_ID,
+} from './item.constants';
+
+export interface SeedItemDefinition {
+  id: string;
+  key: ItemKey;
+  name: string;
+  description: string;
+  type: ItemType;
+  equipmentSlot: EquipmentSlot | null;
+  rarity: ItemRarity;
+  tier: number;
+  requiredLevel: number;
+  weaponDamage: number;
+  bonusHp: number;
+  bonusAttack: number;
+  bonusArmor: number;
+  sellPrice: number;
+  iconPath: string;
+}
+
+function item(
+  key: ItemKey,
+  name: string,
+  description: string,
+  type: ItemType,
+  equipmentSlot: EquipmentSlot | null,
+  rarity: ItemRarity,
+  stats: Partial<Pick<SeedItemDefinition, 'weaponDamage' | 'bonusHp' | 'bonusAttack' | 'bonusArmor'>> = {},
+): SeedItemDefinition {
+  return {
+    id: ITEM_IDS[key],
+    key,
+    name,
+    description,
+    type,
+    equipmentSlot,
+    rarity,
+    tier: 1,
+    requiredLevel: 1,
+    weaponDamage: stats.weaponDamage ?? 0,
+    bonusHp: stats.bonusHp ?? 0,
+    bonusAttack: stats.bonusAttack ?? 0,
+    bonusArmor: stats.bonusArmor ?? 0,
+    // Always 0: no merchants exist in Slice 0.4, and the balancing doc's
+    // Grenzmarken table lists purchase prices, not sell prices.
+    sellPrice: 0,
+    iconPath: `/images/items/${key}.png`,
+  };
+}
+
+// Stats from docs/Ashen_Realms_Balancing_Items_Loot_Design_V1.md §19.
+export const ITEM_DEFINITIONS: SeedItemDefinition[] = [
+  item(
+    'worn-short-sword',
+    'Abgenutztes Kurzschwert',
+    'Die Klinge eines Rekruten, öfter geschliffen als geführt.',
+    ItemType.WEAPON,
+    EquipmentSlot.WEAPON,
+    ItemRarity.COMMON,
+    { weaponDamage: 8 },
+  ),
+  item(
+    'bandit-blade',
+    'Räuberklinge',
+    'Eine grob gezahnte Klinge, geschmiedet für schnelle Überfälle.',
+    ItemType.WEAPON,
+    EquipmentSlot.WEAPON,
+    ItemRarity.COMMON,
+    { weaponDamage: 11, bonusAttack: 1 },
+  ),
+  item(
+    'ash-blade',
+    'Aschenklinge',
+    'In der Glut der Aschenfelder gehärtet; die Schneide glimmt noch.',
+    ItemType.WEAPON,
+    EquipmentSlot.WEAPON,
+    ItemRarity.RARE,
+    { weaponDamage: 15, bonusAttack: 2 },
+  ),
+  item(
+    'bandit-hood',
+    'Räuberhaube',
+    'Vernarbtes Leder, das Gesicht und Absicht des Trägers verbirgt.',
+    ItemType.ARMOR,
+    EquipmentSlot.HEAD,
+    ItemRarity.COMMON,
+    { bonusArmor: 3, bonusHp: 5 },
+  ),
+  item(
+    'reinforced-leather-jacket',
+    'Verstärkte Lederjacke',
+    'Mit Eisenplatten benähtes Leder, schwer und verlässlich.',
+    ItemType.ARMOR,
+    EquipmentSlot.CHEST,
+    ItemRarity.RARE,
+    { bonusArmor: 7, bonusHp: 10 },
+  ),
+  item(
+    'raider-gloves',
+    'Plündererhandschuhe',
+    'Beschlagene Handschuhe, abgegriffen von fremdem Gut.',
+    ItemType.ARMOR,
+    EquipmentSlot.HANDS,
+    ItemRarity.COMMON,
+    { bonusArmor: 3, bonusAttack: 1 },
+  ),
+  item(
+    'guardsman-legs',
+    'Wachmannsbeinkleid',
+    'Beinzeug der Grenzwacht, an den Knien geflickt.',
+    ItemType.ARMOR,
+    EquipmentSlot.LEGS,
+    ItemRarity.RARE,
+    { bonusArmor: 5, bonusHp: 5 },
+  ),
+  item(
+    'ash-boots',
+    'Aschenstiefel',
+    'Stiefel, die durch glimmende Felder getragen wurden und blieben.',
+    ItemType.ARMOR,
+    EquipmentSlot.FEET,
+    ItemRarity.RARE,
+    { bonusArmor: 4, bonusHp: 5 },
+  ),
+  item(
+    'borderwatch-sigil',
+    'Zeichen der Grenzwacht',
+    'Das Wappen eines Turms, den es nicht mehr gibt.',
+    ItemType.ARMOR,
+    EquipmentSlot.AMULET,
+    ItemRarity.RARE,
+    { bonusAttack: 3, bonusHp: 10 },
+  ),
+  item(
+    'burned-captain-pendant',
+    'Anhänger des verbrannten Hauptmanns',
+    'Ein Schädel aus Schlacke, in dem die Glut nie erlosch.',
+    ItemType.ARMOR,
+    EquipmentSlot.AMULET,
+    ItemRarity.EPIC,
+    { bonusAttack: 3, bonusHp: 15, bonusArmor: 2 },
+  ),
+  // Seeded as content only. Slice 0.4 implements no consumable use, and the
+  // Straßenräuber loot entry for it is deliberately deferred (spec §16).
+  item(
+    'small-healing-potion',
+    'Kleiner Heiltrank',
+    'Ein bitterer Sud, der Wunden für einen Atemzug vergessen lässt.',
+    ItemType.CONSUMABLE,
+    null,
+    ItemRarity.COMMON,
+  ),
+  item(
+    'ash-pelt',
+    'Aschenfell',
+    'Versengtes Fell, zäh wie Leder und grau von Ascheflug.',
+    ItemType.MATERIAL,
+    null,
+    ItemRarity.COMMON,
+  ),
+];
+
+export const LOOT_TABLES = [
+  { id: ASH_RAT_LOOT_TABLE_ID, key: 'ash-rat-loot', name: 'Aschenratte Beute' },
+  { id: ROAD_BANDIT_LOOT_TABLE_ID, key: 'road-bandit-loot', name: 'Straßenräuber Beute' },
+];
+
+export interface SeedLootTableEntry {
+  lootTableId: string;
+  itemDefinitionId: string;
+  position: number;
+  dropChance: string;
+  minQuantity: number;
+  maxQuantity: number;
+  enabled: boolean;
+}
+
+function entry(
+  lootTableId: string,
+  key: ItemKey,
+  position: number,
+  dropChance: string,
+): SeedLootTableEntry {
+  return {
+    lootTableId,
+    itemDefinitionId: ITEM_IDS[key],
+    position,
+    dropChance,
+    minQuantity: 1,
+    maxQuantity: 1,
+    enabled: true,
+  };
+}
+
+/**
+ * Drop chances from docs/Ashen_Realms_Balancing_Items_Loot_Design_V1.md §27–28.
+ * Every entry is an independent roll (spec §17), rolled in `position` order.
+ *
+ * DEFERRED: the Straßenräuber table also lists 10 % Kleiner Heiltrank. It is
+ * omitted here because Slice 0.4 implements no consumables (spec §16).
+ */
+export const LOOT_TABLE_ENTRIES: SeedLootTableEntry[] = [
+  entry(ASH_RAT_LOOT_TABLE_ID, 'ash-pelt', 1, '0.6000'),
+  entry(ASH_RAT_LOOT_TABLE_ID, 'worn-short-sword', 2, '0.0800'),
+  entry(ROAD_BANDIT_LOOT_TABLE_ID, 'bandit-blade', 1, '0.1800'),
+  entry(ROAD_BANDIT_LOOT_TABLE_ID, 'bandit-hood', 2, '0.1200'),
+  entry(ROAD_BANDIT_LOOT_TABLE_ID, 'raider-gloves', 3, '0.0800'),
+];

apps/api/src/database/seeds/item.constants.ts

@@ -0,0 +1,20 @@
+// Stable content ids, in art-sheet order. Aschenfell (no sheet entry) is last.
+export const ITEM_IDS = {
+  'worn-short-sword': '50000000-0000-4000-8000-000000000001',
+  'bandit-blade': '50000000-0000-4000-8000-000000000002',
+  'ash-blade': '50000000-0000-4000-8000-000000000003',
+  'bandit-hood': '50000000-0000-4000-8000-000000000004',
+  'reinforced-leather-jacket': '50000000-0000-4000-8000-000000000005',
+  'raider-gloves': '50000000-0000-4000-8000-000000000006',
+  'guardsman-legs': '50000000-0000-4000-8000-000000000007',
+  'ash-boots': '50000000-0000-4000-8000-000000000008',
+  'borderwatch-sigil': '50000000-0000-4000-8000-000000000009',
+  'burned-captain-pendant': '50000000-0000-4000-8000-00000000000a',
+  'small-healing-potion': '50000000-0000-4000-8000-00000000000b',
+  'ash-pelt': '50000000-0000-4000-8000-00000000000c',
+} as const;
+
+export type ItemKey = keyof typeof ITEM_IDS;
+
+export const ASH_RAT_LOOT_TABLE_ID = '60000000-0000-4000-8000-000000000001';
+export const ROAD_BANDIT_LOOT_TABLE_ID = '60000000-0000-4000-8000-000000000002';

apps/api/src/database/seeds/run-seed.ts

@@ -0,0 +1,17 @@
+import { AppDataSource } from '../data-source';
+import { seedVisibleVerticalSlice } from './vertical-slice.seed';
+
+async function runSeed(): Promise<void> {
+  await AppDataSource.initialize();
+
+  try {
+    await seedVisibleVerticalSlice(AppDataSource);
+  } finally {
+    await AppDataSource.destroy();
+  }
+}
+
+void runSeed().catch((error: unknown) => {
+  console.error('Demo seed failed:', error);
+  process.exitCode = 1;
+});

apps/api/src/database/seeds/vertical-slice.constants.ts

@@ -0,0 +1,4 @@
+export const SOUTH_GATE_ID = '20000000-0000-4000-8000-000000000001';
+export const BURNED_ROAD_ID = '20000000-0000-4000-8000-000000000002';
+export const ASH_RAT_MONSTER_ID = '30000000-0000-4000-8000-000000000001';
+export const ROAD_BANDIT_MONSTER_ID = '30000000-0000-4000-8000-000000000002';

apps/api/src/database/seeds/vertical-slice.seed.spec.ts

@@ -0,0 +1,339 @@
+import { DataSource } from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { ItemDefinition } from '../../items/entities/item-definition.entity';
+import { LootTableEntry } from '../../loot/entities/loot-table-entry.entity';
+import { LootTable } from '../../loot/entities/loot-table.entity';
+import { LocationMonster } from '../../monsters/entities/location-monster.entity';
+import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { LocationConnection } from '../../world/entities/location-connection.entity';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+import { ASH_RAT_LOOT_TABLE_ID, ITEM_IDS, ROAD_BANDIT_LOOT_TABLE_ID } from './item.constants';
+import { seedVisibleVerticalSlice } from './vertical-slice.seed';
+
+type Row = Record<string, unknown>;
+
+const DEMO_CHARACTER_ID = '10000000-0000-4000-8000-000000000001';
+const SOUTH_GATE_ID = '20000000-0000-4000-8000-000000000001';
+const BURNED_ROAD_ID = '20000000-0000-4000-8000-000000000002';
+const ASH_RAT_MONSTER_ID = '30000000-0000-4000-8000-000000000001';
+const ROAD_BANDIT_MONSTER_ID = '30000000-0000-4000-8000-000000000002';
+
+class InMemoryRepository {
+  readonly rows: Row[] = [];
+  readonly upsert = jest.fn(
+    async (
+      values: Row | Row[],
+      conflictPaths: string[] | { conflictPaths: string[] },
+    ) => {
+      const conflictKeys = Array.isArray(conflictPaths)
+        ? conflictPaths
+        : conflictPaths.conflictPaths;
+
+      for (const value of Array.isArray(values) ? values : [values]) {
+        const existing = this.rows.find((row) =>
+          conflictKeys.every((key) => row[key] === value[key]),
+        );
+
+        if (existing) {
+          Object.assign(existing, value);
+        } else {
+          this.rows.push({ ...value });
+        }
+      }
+    },
+  );
+  readonly findOneBy = jest.fn(async (criteria: Row) =>
+    this.rows.find((row) =>
+      Object.entries(criteria).every(([key, value]) => row[key] === value),
+    ),
+  );
+  readonly insert = jest.fn(async (value: Row) => {
+    this.rows.push({ ...value });
+  });
+  readonly update = jest.fn(async (criteria: string | Row, value: Row) => {
+    const row = this.rows.find((candidate) =>
+      typeof criteria === 'string'
+        ? candidate.id === criteria
+        : Object.entries(criteria).every(
+            ([key, expected]) => candidate[key] === expected,
+          ),
+    );
+
+    if (row) {
+      Object.assign(row, value);
+    }
+  });
+}
+
+function createDataSource(
+  locationRepository: InMemoryRepository,
+  connectionRepository: InMemoryRepository,
+  characterRepository: InMemoryRepository,
+  monsterRepository: InMemoryRepository,
+  locationMonsterRepository: InMemoryRepository,
+  itemRepository: InMemoryRepository = new InMemoryRepository(),
+  lootTableRepository: InMemoryRepository = new InMemoryRepository(),
+  lootEntryRepository: InMemoryRepository = new InMemoryRepository(),
+): DataSource {
+  return {
+    getRepository: jest.fn((entity: unknown) => {
+      if (entity === LocationDefinition) return locationRepository;
+      if (entity === LocationConnection) return connectionRepository;
+      if (entity === Character) return characterRepository;
+      if (entity === MonsterDefinition) return monsterRepository;
+      if (entity === LocationMonster) return locationMonsterRepository;
+      if (entity === ItemDefinition) return itemRepository;
+      if (entity === LootTable) return lootTableRepository;
+      if (entity === LootTableEntry) return lootEntryRepository;
+
+      throw new Error('Unexpected repository');
+    }),
+  } as unknown as DataSource;
+}
+
+describe('seedVisibleVerticalSlice', () => {
+  it('upserts the two locations and directed connections while inserting one stable demo character', async () => {
+    const locationRepository = new InMemoryRepository();
+    const connectionRepository = new InMemoryRepository();
+    const characterRepository = new InMemoryRepository();
+    const monsterRepository = new InMemoryRepository();
+    const locationMonsterRepository = new InMemoryRepository();
+    const dataSource = createDataSource(
+      locationRepository,
+      connectionRepository,
+      characterRepository,
+      monsterRepository,
+      locationMonsterRepository,
+    );
+
+    await seedVisibleVerticalSlice(dataSource);
+    Object.assign(characterRepository.rows[0], {
+      currentLocationId: BURNED_ROAD_ID,
+      currentHp: 57,
+      experience: 39,
+    });
+    await seedVisibleVerticalSlice(dataSource);
+
+    expect(connectionRepository.upsert).toHaveBeenCalledWith(
+      expect.arrayContaining([
+        expect.objectContaining({
+          fromLocationId: SOUTH_GATE_ID,
+          toLocationId: BURNED_ROAD_ID,
+        }),
+        expect.objectContaining({
+          fromLocationId: BURNED_ROAD_ID,
+          toLocationId: SOUTH_GATE_ID,
+        }),
+      ]),
+      ['fromLocationId', 'toLocationId'],
+    );
+    expect(characterRepository.insert).toHaveBeenCalledWith(
+      expect.objectContaining({ id: DEMO_CHARACTER_ID }),
+    );
+    expect(locationRepository.rows).toHaveLength(2);
+    expect(locationRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          key: 'south-gate',
+          artworkPath: '/images/backgrounds/Suedtor.png',
+        }),
+        expect.objectContaining({
+          key: 'burned-road',
+          artworkPath: '/images/backgrounds/Aschestrasse.png',
+        }),
+      ]),
+    );
+    expect(connectionRepository.rows).toHaveLength(2);
+    expect(characterRepository.rows).toHaveLength(1);
+    expect(characterRepository.rows[0]).toEqual(
+      expect.objectContaining({
+        currentLocationId: BURNED_ROAD_ID,
+        currentHp: 57,
+        experience: 39,
+      }),
+    );
+
+    expect(monsterRepository.insert).toHaveBeenCalledTimes(2);
+    expect(monsterRepository.rows).toHaveLength(2);
+    expect(monsterRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          key: 'ash-rat',
+          name: 'Aschenratte',
+          level: 1,
+          maxHp: 45,
+          attack: 5,
+          armor: 0,
+          experienceReward: 8,
+          silverMin: 4,
+          silverMax: 7,
+          artworkPath: '/images/monsters/ash-rat.png',
+        }),
+        expect.objectContaining({
+          key: 'road-bandit',
+          name: 'Straßenräuber',
+          level: 2,
+          maxHp: 75,
+          attack: 9,
+          armor: 5,
+          experienceReward: 16,
+          silverMin: 9,
+          silverMax: 15,
+          artworkPath: '/images/monsters/road-bandit.png',
+        }),
+      ]),
+    );
+
+    expect(locationMonsterRepository.upsert).toHaveBeenCalledWith(
+      expect.arrayContaining([
+        expect.objectContaining({
+          locationId: BURNED_ROAD_ID,
+          monsterId: ASH_RAT_MONSTER_ID,
+          weight: 70,
+        }),
+        expect.objectContaining({
+          locationId: BURNED_ROAD_ID,
+          monsterId: ROAD_BANDIT_MONSTER_ID,
+          weight: 30,
+        }),
+      ]),
+      ['locationId', 'monsterId'],
+    );
+    expect(locationMonsterRepository.rows).toHaveLength(2);
+  });
+
+  it('preserves existing location IDs and uses them for the directed connections', async () => {
+    const locationRepository = new InMemoryRepository();
+    const connectionRepository = new InMemoryRepository();
+    const characterRepository = new InMemoryRepository();
+    const monsterRepository = new InMemoryRepository();
+    const locationMonsterRepository = new InMemoryRepository();
+    const persistedSouthGateId = '40000000-0000-4000-8000-000000000001';
+    locationRepository.rows.push({
+      id: persistedSouthGateId,
+      key: 'south-gate',
+      name: 'Veraltetes Südtor',
+    });
+    const dataSource = createDataSource(
+      locationRepository,
+      connectionRepository,
+      characterRepository,
+      monsterRepository,
+      locationMonsterRepository,
+    );
+
+    await seedVisibleVerticalSlice(dataSource);
+
+    expect(locationRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          id: persistedSouthGateId,
+          key: 'south-gate',
+          name: 'Südtor von Graufurt',
+        }),
+        expect.objectContaining({
+          id: BURNED_ROAD_ID,
+          key: 'burned-road',
+        }),
+      ]),
+    );
+    expect(connectionRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          fromLocationId: persistedSouthGateId,
+          toLocationId: BURNED_ROAD_ID,
+        }),
+        expect.objectContaining({
+          fromLocationId: BURNED_ROAD_ID,
+          toLocationId: persistedSouthGateId,
+        }),
+      ]),
+    );
+    expect(characterRepository.rows).toEqual([
+      expect.objectContaining({
+        id: DEMO_CHARACTER_ID,
+        currentLocationId: persistedSouthGateId,
+      }),
+    ]);
+  });
+
+  it('seeds the tier-1 items and both loot tables idempotently and wires them to the monsters', async () => {
+    const locationRepository = new InMemoryRepository();
+    const connectionRepository = new InMemoryRepository();
+    const characterRepository = new InMemoryRepository();
+    const monsterRepository = new InMemoryRepository();
+    const locationMonsterRepository = new InMemoryRepository();
+    const itemRepository = new InMemoryRepository();
+    const lootTableRepository = new InMemoryRepository();
+    const lootEntryRepository = new InMemoryRepository();
+    const dataSource = createDataSource(
+      locationRepository,
+      connectionRepository,
+      characterRepository,
+      monsterRepository,
+      locationMonsterRepository,
+      itemRepository,
+      lootTableRepository,
+      lootEntryRepository,
+    );
+
+    await seedVisibleVerticalSlice(dataSource);
+    await seedVisibleVerticalSlice(dataSource);
+
+    expect(itemRepository.rows).toHaveLength(12);
+    expect(itemRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          key: 'bandit-blade',
+          name: 'Räuberklinge',
+          type: 'WEAPON',
+          equipmentSlot: 'WEAPON',
+          rarity: 'COMMON',
+          weaponDamage: 11,
+          bonusAttack: 1,
+          sellPrice: 0,
+          iconPath: '/images/items/bandit-blade.png',
+        }),
+        expect.objectContaining({
+          key: 'ash-pelt',
+          name: 'Aschenfell',
+          type: 'MATERIAL',
+          equipmentSlot: null,
+        }),
+      ]),
+    );
+
+    expect(lootTableRepository.rows).toHaveLength(2);
+    expect(lootEntryRepository.rows).toHaveLength(5);
+    expect(lootEntryRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          lootTableId: ASH_RAT_LOOT_TABLE_ID,
+          itemDefinitionId: ITEM_IDS['ash-pelt'],
+          position: 1,
+          dropChance: '0.6000',
+        }),
+        expect.objectContaining({
+          lootTableId: ROAD_BANDIT_LOOT_TABLE_ID,
+          itemDefinitionId: ITEM_IDS['bandit-blade'],
+          position: 1,
+          dropChance: '0.1800',
+        }),
+      ]),
+    );
+
+    // The Kleiner Heiltrank entry is deliberately deferred (spec §16).
+    expect(
+      lootEntryRepository.rows.some(
+        (row) => row.itemDefinitionId === ITEM_IDS['small-healing-potion'],
+      ),
+    ).toBe(false);
+
+    expect(monsterRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ key: 'ash-rat', lootTableId: ASH_RAT_LOOT_TABLE_ID }),
+        expect.objectContaining({ key: 'road-bandit', lootTableId: ROAD_BANDIT_LOOT_TABLE_ID }),
+      ]),
+    );
+  });
+});

apps/api/src/database/seeds/vertical-slice.seed.ts

@@ -0,0 +1,208 @@
+import { DataSource } from 'typeorm';
+import { DEMO_CHARACTER_ID } from '../../demo/demo-character.constants';
+import { Character } from '../../characters/entities/character.entity';
+import { ItemDefinition } from '../../items/entities/item-definition.entity';
+import { LootTableEntry } from '../../loot/entities/loot-table-entry.entity';
+import { LootTable } from '../../loot/entities/loot-table.entity';
+import { EncounterType } from '../../monsters/entities/encounter-type.enum';
+import { LocationMonster } from '../../monsters/entities/location-monster.entity';
+import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { LocationConnection } from '../../world/entities/location-connection.entity';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+import {
+  ASH_RAT_LOOT_TABLE_ID,
+  ROAD_BANDIT_LOOT_TABLE_ID,
+} from './item.constants';
+import { ITEM_DEFINITIONS, LOOT_TABLES, LOOT_TABLE_ENTRIES } from './item-content';
+import {
+  ASH_RAT_MONSTER_ID,
+  BURNED_ROAD_ID,
+  ROAD_BANDIT_MONSTER_ID,
+  SOUTH_GATE_ID,
+} from './vertical-slice.constants';
+
+export async function seedVisibleVerticalSlice(
+  dataSource: DataSource,
+): Promise<void> {
+  const locationRepository = dataSource.getRepository(LocationDefinition);
+  const connectionRepository = dataSource.getRepository(LocationConnection);
+  const characterRepository = dataSource.getRepository(Character);
+  const monsterRepository = dataSource.getRepository(MonsterDefinition);
+  const locationMonsterRepository = dataSource.getRepository(LocationMonster);
+  const itemRepository = dataSource.getRepository(ItemDefinition);
+  const lootTableRepository = dataSource.getRepository(LootTable);
+  const lootEntryRepository = dataSource.getRepository(LootTableEntry);
+
+  const locations = [
+    {
+      id: SOUTH_GATE_ID,
+      key: 'south-gate',
+      name: 'Südtor von Graufurt',
+      description:
+        'Am schwarzen Südtor endet der Schutz Graufurts. Hinter den Wachtfeuern beginnt die stille Weite der Aschenfelder.',
+      regionKey: 'ashen-fields',
+      minRecommendedLevel: 1,
+      maxRecommendedLevel: 1,
+      dangerLevel: 0,
+      isSafe: true,
+      huntingEnabled: false,
+      artworkPath: '/images/backgrounds/Suedtor.png',
+    },
+    {
+      id: BURNED_ROAD_ID,
+      key: 'burned-road',
+      name: 'Verbrannte Straße',
+      description:
+        'Die alte Handelsstraße führt durch verkohlte Felder. Zwischen Asche und zerbrochenen Wagen warten die ersten Gefahren.',
+      regionKey: 'ashen-fields',
+      minRecommendedLevel: 1,
+      maxRecommendedLevel: 2,
+      dangerLevel: 1,
+      isSafe: false,
+      huntingEnabled: true,
+      artworkPath: '/images/backgrounds/Aschestrasse.png',
+    },
+  ];
+  let southGateId = SOUTH_GATE_ID;
+  let burnedRoadId = BURNED_ROAD_ID;
+
+  for (const location of locations) {
+    const existing = await locationRepository.findOneBy({
+      key: location.key,
+    });
+    const { id, key, ...definition } = location;
+    const persistedId = existing?.id ?? id;
+
+    if (existing) {
+      await locationRepository.update(existing.id, definition);
+    } else {
+      await locationRepository.insert(location);
+    }
+
+    if (key === 'south-gate') {
+      southGateId = persistedId;
+    } else {
+      burnedRoadId = persistedId;
+    }
+  }
+
+  await connectionRepository.upsert(
+    [
+      {
+        fromLocationId: southGateId,
+        toLocationId: burnedRoadId,
+        travelDurationSeconds: 10,
+        ambushChance: '0.0500',
+        enabled: true,
+      },
+      {
+        fromLocationId: burnedRoadId,
+        toLocationId: southGateId,
+        travelDurationSeconds: 10,
+        ambushChance: '0.0500',
+        enabled: true,
+      },
+    ],
+    ['fromLocationId', 'toLocationId'],
+  );
+
+  // Content is upserted by its stable key so re-running never duplicates rows
+  // and never touches player-owned character_items or combat_rewards.
+  await itemRepository.upsert(ITEM_DEFINITIONS, ['key']);
+  await lootTableRepository.upsert(LOOT_TABLES, ['key']);
+  await lootEntryRepository.upsert(LOOT_TABLE_ENTRIES, [
+    'lootTableId',
+    'itemDefinitionId',
+  ]);
+
+  const monsters = [
+    {
+      id: ASH_RAT_MONSTER_ID,
+      key: 'ash-rat',
+      name: 'Aschenratte',
+      level: 1,
+      maxHp: 45,
+      attack: 5,
+      armor: 0,
+      experienceReward: 8,
+      silverMin: 4,
+      silverMax: 7,
+      artworkPath: '/images/monsters/ash-rat.png',
+      lootTableId: ASH_RAT_LOOT_TABLE_ID,
+    },
+    {
+      id: ROAD_BANDIT_MONSTER_ID,
+      key: 'road-bandit',
+      name: 'Straßenräuber',
+      level: 2,
+      maxHp: 75,
+      attack: 9,
+      armor: 5,
+      experienceReward: 16,
+      silverMin: 9,
+      silverMax: 15,
+      artworkPath: '/images/monsters/road-bandit.png',
+      lootTableId: ROAD_BANDIT_LOOT_TABLE_ID,
+    },
+  ];
+  let ashRatId = ASH_RAT_MONSTER_ID;
+  let roadBanditId = ROAD_BANDIT_MONSTER_ID;
+
+  for (const monster of monsters) {
+    const existingMonster = await monsterRepository.findOneBy({
+      key: monster.key,
+    });
+    const { id, key, ...definition } = monster;
+    const persistedId = existingMonster?.id ?? id;
+
+    if (existingMonster) {
+      await monsterRepository.update(existingMonster.id, definition);
+    } else {
+      await monsterRepository.insert(monster);
+    }
+
+    if (key === 'ash-rat') {
+      ashRatId = persistedId;
+    } else {
+      roadBanditId = persistedId;
+    }
+  }
+
+  await locationMonsterRepository.upsert(
+    [
+      {
+        locationId: burnedRoadId,
+        monsterId: ashRatId,
+        weight: 70,
+        encounterType: EncounterType.NORMAL,
+        enabled: true,
+      },
+      {
+        locationId: burnedRoadId,
+        monsterId: roadBanditId,
+        weight: 30,
+        encounterType: EncounterType.NORMAL,
+        enabled: true,
+      },
+    ],
+    ['locationId', 'monsterId'],
+  );
+
+  const existing = await characterRepository.findOneBy({
+    id: DEMO_CHARACTER_ID,
+  });
+
+  if (!existing) {
+    await characterRepository.insert({
+      id: DEMO_CHARACTER_ID,
+      name: 'Aric Duskwalker',
+      level: 1,
+      experience: 0,
+      silver: 0,
+      baseHp: 100,
+      baseAttack: 6,
+      currentHp: 100,
+      currentLocationId: southGateId,
+    });
+  }
+}

apps/api/src/demo/demo-character.constants.ts

@@ -0,0 +1 @@
+export const DEMO_CHARACTER_ID = '10000000-0000-4000-8000-000000000001';

apps/api/src/health/health.controller.spec.ts

@@ -0,0 +1,7 @@
+import { HealthController } from './health.controller';
+
+describe('HealthController', () => {
+  it('returns an ok status for liveness checks', () => {
+    expect(new HealthController().getHealth()).toEqual({ status: 'ok' });
+  });
+});

apps/api/src/health/health.controller.ts

@@ -0,0 +1,9 @@
+import { Controller, Get } from '@nestjs/common';
+
+@Controller('health')
+export class HealthController {
+  @Get()
+  getHealth() {
+    return { status: 'ok' };
+  }
+}

apps/api/src/health/health.module.ts

@@ -0,0 +1,7 @@
+import { Module } from '@nestjs/common';
+import { HealthController } from './health.controller';
+
+@Module({
+  controllers: [HealthController],
+})
+export class HealthModule {}

apps/api/src/hunting/danger-rating.spec.ts

@@ -0,0 +1,74 @@
+import { calculateDangerRating, DangerRating } from './danger-rating';
+
+// Demo character seed stats (Task 3): baseAttack: 6, baseHp: 100, no armor.
+// power(character) = 6*4 + 0*2 + floor(100/5) = 24 + 0 + 20 = 44
+const CHARACTER = { attack: 6, armor: 0, hp: 100 };
+const CHARACTER_POWER = 44;
+
+describe('calculateDangerRating', () => {
+  it('rates the seeded Aschenratte as MATCH', () => {
+    // Aschenratte: attack 5, armor 0, maxHp 45
+    // power(monster) = 5*4 + 0*2 + floor(45/5) = 20 + 0 + 9 = 29
+    // ratio = 29 / 44 = 0.6590909... -> not < 0.65, and < 1.0 -> MATCH
+    const monster = { attack: 5, armor: 0, hp: 45 };
+
+    expect(calculateDangerRating(CHARACTER, monster)).toBe(DangerRating.MATCH);
+  });
+
+  it('rates the seeded Straßenräuber as STRONG', () => {
+    // Straßenräuber: attack 9, armor 5, maxHp 75
+    // power(monster) = 9*4 + 5*2 + floor(75/5) = 36 + 10 + 15 = 61
+    // ratio = 61 / 44 = 1.3863636... -> not < 1.0, and < 1.7 -> STRONG
+    const monster = { attack: 9, armor: 5, hp: 75 };
+
+    expect(calculateDangerRating(CHARACTER, monster)).toBe(DangerRating.STRONG);
+  });
+
+  it('rates a monster just below the WEAK/MATCH boundary as WEAK', () => {
+    // Hand-picked monster: attack 4, armor 4, hp 20
+    // power(monster) = 4*4 + 4*2 + floor(20/5) = 16 + 8 + 4 = 28
+    // ratio = 28 / 44 = 0.6363636...
+    // WEAK/MATCH boundary is ratio < 0.65, i.e. power < 0.65 * 44 = 28.6.
+    // 28 is the largest integer power below that boundary -> WEAK.
+    // (One power higher, 29, is the Aschenratte case above, which is MATCH.)
+    const monster = { attack: 4, armor: 4, hp: 20 };
+
+    expect(calculateDangerRating(CHARACTER, monster)).toBe(DangerRating.WEAK);
+  });
+
+  it('rates a monster just at the STRONG/VERY_DANGEROUS boundary as VERY_DANGEROUS', () => {
+    // Hand-picked monster: attack 15, armor 5, hp 25
+    // power(monster) = 15*4 + 5*2 + floor(25/5) = 60 + 10 + 5 = 75
+    // ratio = 75 / 44 = 1.7045454...
+    // STRONG/VERY_DANGEROUS boundary is ratio < 1.7, i.e. power < 1.7 * 44 = 74.8.
+    // 75 is the smallest integer power at/above that boundary -> VERY_DANGEROUS.
+    // (One power lower, 74, gives ratio 74/44 = 1.6818..., which is STRONG.)
+    const monster = { attack: 15, armor: 5, hp: 25 };
+
+    expect(calculateDangerRating(CHARACTER, monster)).toBe(
+      DangerRating.VERY_DANGEROUS,
+    );
+  });
+
+  it('rates a monster just at the VERY_DANGEROUS/DEADLY boundary as DEADLY', () => {
+    // Hand-picked monster: attack 20, armor 10, hp 10
+    // power(monster) = 20*4 + 10*2 + floor(10/5) = 80 + 20 + 2 = 102
+    // ratio = 102 / 44 = 2.3181818...
+    // VERY_DANGEROUS/DEADLY boundary is ratio < 2.3, i.e. power < 2.3 * 44 = 101.2.
+    // 102 is the smallest integer power at/above that boundary -> DEADLY.
+    // (One power lower, 101, gives ratio 101/44 = 2.2954..., which is VERY_DANGEROUS.)
+    const monster = { attack: 20, armor: 10, hp: 10 };
+
+    expect(calculateDangerRating(CHARACTER, monster)).toBe(DangerRating.DEADLY);
+  });
+});
+
+// Sanity check that CHARACTER_POWER documented above matches the formula.
+describe('CHARACTER_POWER sanity check', () => {
+  it('matches power(CHARACTER) as computed by the same formula', () => {
+    const power =
+      CHARACTER.attack * 4 + CHARACTER.armor * 2 + Math.floor(CHARACTER.hp / 5);
+
+    expect(power).toBe(CHARACTER_POWER);
+  });
+});

apps/api/src/hunting/danger-rating.ts

@@ -0,0 +1,31 @@
+export enum DangerRating {
+  WEAK = 'WEAK',
+  MATCH = 'MATCH',
+  STRONG = 'STRONG',
+  VERY_DANGEROUS = 'VERY_DANGEROUS',
+  DEADLY = 'DEADLY',
+}
+
+export interface CombatantStats {
+  attack: number;
+  armor: number;
+  hp: number;
+}
+
+// power(entity) = attack*4 + armor*2 + floor(hp/5) — a deliberately small,
+// provisional server-side stand-in for a future CombatPower system (none
+// exists yet in this codebase). ratio = monsterPower / characterPower.
+export function calculateDangerRating(
+  character: CombatantStats,
+  monster: CombatantStats,
+): DangerRating {
+  const power = (stats: CombatantStats) =>
+    stats.attack * 4 + stats.armor * 2 + Math.floor(stats.hp / 5);
+  const ratio = power(monster) / power(character);
+
+  if (ratio < 0.65) return DangerRating.WEAK;
+  if (ratio < 1.0) return DangerRating.MATCH;
+  if (ratio < 1.7) return DangerRating.STRONG;
+  if (ratio < 2.3) return DangerRating.VERY_DANGEROUS;
+  return DangerRating.DEADLY;
+}

apps/api/src/hunting/entities/hunt-encounter.entity.ts

@@ -0,0 +1,51 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { HuntEncounterStatus } from '../hunt-encounter-status.enum';
+import { Hunt } from './hunt.entity';
+
+@Entity({ name: 'hunt_encounters' })
+export class HuntEncounter {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'hunt_id', type: 'uuid' })
+  huntId!: string;
+
+  @Column({ name: 'monster_definition_id', type: 'uuid' })
+  monsterDefinitionId!: string;
+
+  @Column({ name: 'position', type: 'integer' })
+  position!: number;
+
+  // Owned by the combat module, which advances it as fights start and end.
+  // DEFEATED and IN_PROGRESS both bar a new fight; a lost fight resets the
+  // encounter to AVAILABLE so the player can try again.
+  @Column({
+    name: 'status',
+    type: 'enum',
+    enum: HuntEncounterStatus,
+    enumName: 'hunt_encounter_status_enum',
+  })
+  status!: HuntEncounterStatus;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  // CASCADE (unlike the other FKs in this file, which use RESTRICT): a
+  // HuntEncounter is owned/composed by its parent Hunt and has no
+  // independent lifecycle, so it should be removed along with its Hunt.
+  @ManyToOne(() => Hunt, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'hunt_id' })
+  hunt!: Hunt;
+
+  @ManyToOne(() => MonsterDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'monster_definition_id' })
+  monster!: MonsterDefinition;
+}

apps/api/src/hunting/entities/hunt.entity.ts

@@ -0,0 +1,42 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+import { HuntStatus } from '../hunt-status.enum';
+
+@Entity({ name: 'hunts' })
+export class Hunt {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'character_id', type: 'uuid' })
+  characterId!: string;
+
+  @Column({ name: 'location_id', type: 'uuid' })
+  locationId!: string;
+
+  @Column({
+    name: 'status',
+    type: 'enum',
+    enum: HuntStatus,
+    enumName: 'hunt_status_enum',
+  })
+  status!: HuntStatus;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @ManyToOne(() => Character, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'character_id' })
+  character!: Character;
+
+  @ManyToOne(() => LocationDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'location_id' })
+  location!: LocationDefinition;
+}

apps/api/src/hunting/hunt-encounter-status.enum.ts

@@ -0,0 +1,5 @@
+export enum HuntEncounterStatus {
+  AVAILABLE = 'AVAILABLE',
+  IN_PROGRESS = 'IN_PROGRESS',
+  DEFEATED = 'DEFEATED',
+}

apps/api/src/hunting/hunt-status.enum.ts

@@ -0,0 +1,4 @@
+export enum HuntStatus {
+  ACTIVE = 'ACTIVE',
+  SUPERSEDED = 'SUPERSEDED',
+}

apps/api/src/hunting/hunting.controller.spec.ts

@@ -0,0 +1,90 @@
+import { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { configureApplication } from '../app.config';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { HuntingController } from './hunting.controller';
+import { HuntingService } from './hunting.service';
+
+describe('HuntingController', () => {
+  let app: INestApplication<App>;
+  const startHunt = jest.fn();
+  const getActiveHunt = jest.fn();
+
+  beforeEach(async () => {
+    startHunt.mockReset();
+    getActiveHunt.mockReset();
+    const module = await Test.createTestingModule({
+      controllers: [HuntingController],
+      providers: [
+        {
+          provide: HuntingService,
+          useValue: { startHunt, getActiveHunt },
+        },
+      ],
+    }).compile();
+
+    app = module.createNestApplication<App>();
+    configureApplication(app);
+    await app.init();
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+
+  it('delegates to huntingService.startHunt with the demo character id and returns its result', async () => {
+    const huntResult = {
+      id: 'hunt-1',
+      location: { id: 'loc-1', key: 'burned-road', name: 'Verbrannte Strasse' },
+      encounters: [],
+    };
+    startHunt.mockResolvedValue(huntResult);
+
+    const response = await request(app.getHttpServer())
+      .post('/api/hunts')
+      .expect(201);
+
+    expect(startHunt).toHaveBeenCalledWith(DEMO_CHARACTER_ID);
+    expect(response.body).toEqual(huntResult);
+  });
+
+  it('serves the resumable hunt with its encounter statuses', async () => {
+    const huntResult = {
+      id: 'hunt-1',
+      location: { id: 'loc-1', key: 'burned-road', name: 'Verbrannte Strasse' },
+      encounters: [
+        {
+          id: 'encounter-1',
+          monster: {
+            key: 'ash-rat',
+            name: 'Aschenratte',
+            level: 1,
+            artworkPath: '/images/monsters/ash-rat.png',
+          },
+          dangerRating: 'WEAK',
+          status: 'DEFEATED',
+        },
+      ],
+    };
+    getActiveHunt.mockResolvedValue(huntResult);
+
+    const response = await request(app.getHttpServer())
+      .get('/api/hunts/active')
+      .expect(200);
+
+    expect(getActiveHunt).toHaveBeenCalledWith(DEMO_CHARACTER_ID);
+    expect(response.body).toEqual(huntResult);
+  });
+
+  it('serves an empty body when there is no resumable hunt', async () => {
+    getActiveHunt.mockResolvedValue(null);
+
+    const response = await request(app.getHttpServer())
+      .get('/api/hunts/active')
+      .expect(200);
+
+    expect(response.body).toEqual({});
+  });
+});

apps/api/src/hunting/hunting.controller.ts

@@ -0,0 +1,18 @@
+import { Controller, Get, Post } from '@nestjs/common';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { HuntResultDto, HuntingService } from './hunting.service';
+
+@Controller('hunts')
+export class HuntingController {
+  constructor(private readonly huntingService: HuntingService) {}
+
+  @Post()
+  startHunt(): Promise<HuntResultDto> {
+    return this.huntingService.startHunt(DEMO_CHARACTER_ID);
+  }
+
+  @Get('active')
+  getActiveHunt(): Promise<HuntResultDto | null> {
+    return this.huntingService.getActiveHunt(DEMO_CHARACTER_ID);
+  }
+}

apps/api/src/hunting/hunting.errors.ts

@@ -0,0 +1,37 @@
+import { HttpException } from '@nestjs/common';
+
+export class HuntingDomainError extends HttpException {
+  constructor(
+    public readonly code: string,
+    status: number,
+    message: string,
+  ) {
+    super({ statusCode: status, code, message }, status);
+  }
+}
+
+export function huntingNotAvailable(): HuntingDomainError {
+  return new HuntingDomainError(
+    'HUNTING_NOT_AVAILABLE',
+    400,
+    'Hunting is not available at the current location.',
+  );
+}
+
+export function characterTravelling(): HuntingDomainError {
+  return new HuntingDomainError(
+    'CHARACTER_TRAVELLING',
+    409,
+    'The character cannot hunt while travelling.',
+  );
+}
+
+export function noHuntEncountersAvailable(): HuntingDomainError {
+  return new HuntingDomainError(
+    'NO_HUNT_ENCOUNTERS_AVAILABLE',
+    409,
+    'No encounters are currently available at this location.',
+  );
+}
+
+export { characterNotFound } from '../travel/travel.errors';

apps/api/src/hunting/hunting.module.ts

@@ -0,0 +1,30 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { Character } from '../characters/entities/character.entity';
+import { LocationMonster } from '../monsters/entities/location-monster.entity';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { TravelModule } from '../travel/travel.module';
+import { Hunt } from './entities/hunt.entity';
+import { HuntEncounter } from './entities/hunt-encounter.entity';
+import { HuntingController } from './hunting.controller';
+import { HuntingService } from './hunting.service';
+import { RANDOM_SOURCE, systemRandomSource } from '../shared/random-source';
+
+@Module({
+  imports: [
+    TypeOrmModule.forFeature([
+      MonsterDefinition,
+      LocationMonster,
+      Hunt,
+      HuntEncounter,
+      Character,
+    ]),
+    TravelModule,
+  ],
+  controllers: [HuntingController],
+  providers: [
+    HuntingService,
+    { provide: RANDOM_SOURCE, useValue: systemRandomSource },
+  ],
+})
+export class HuntingModule {}

apps/api/src/hunting/hunting.service.spec.ts

@@ -0,0 +1,726 @@
+import { DataSource, EntityManager, EntityTarget } from 'typeorm';
+import { Character } from '../characters/entities/character.entity';
+import { EncounterType } from '../monsters/entities/encounter-type.enum';
+import { LocationMonster } from '../monsters/entities/location-monster.entity';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { TravelService } from '../travel/travel.service';
+import { TravelStatus } from '../travel/travel-status.enum';
+import { LocationDefinition } from '../world/entities/location-definition.entity';
+import { DangerRating } from './danger-rating';
+import { Hunt } from './entities/hunt.entity';
+import { HuntEncounter } from './entities/hunt-encounter.entity';
+import { HuntEncounterStatus } from './hunt-encounter-status.enum';
+import { HuntStatus } from './hunt-status.enum';
+import { HuntingDomainError } from './hunting.errors';
+import { HuntingService } from './hunting.service';
+import type { RandomSource } from '../shared/random-source';
+
+const CHARACTER_ID = '10000000-0000-4000-8000-000000000001';
+const HUNTING_LOCATION_ID = '20000000-0000-4000-8000-000000000001';
+const SAFE_LOCATION_ID = '20000000-0000-4000-8000-000000000002';
+const MONSTER_A_ID = '30000000-0000-4000-8000-000000000001'; // Aschenratte
+const MONSTER_B_ID = '30000000-0000-4000-8000-000000000002'; // Strassenraeuber
+const LOCATION_MONSTER_A_ID = '40000000-0000-4000-8000-000000000001';
+const LOCATION_MONSTER_B_ID = '40000000-0000-4000-8000-000000000002';
+
+interface FakeState {
+  characters: Character[];
+  locationMonsters: LocationMonster[];
+  hunts: Hunt[];
+  huntEncounters: HuntEncounter[];
+}
+
+// `find` in the fake ignores `relations`, so fixtures attach the joined
+// monster the way TypeORM would have hydrated it.
+function withMonster(
+  encounter: HuntEncounter,
+  monster: MonsterDefinition,
+): HuntEncounter {
+  return { ...encounter, monster } as HuntEncounter;
+}
+
+class FakeRepository<T extends { id: string }> {
+  constructor(
+    private readonly state: FakeState,
+    private readonly target: EntityTarget<T>,
+    private readonly inTransaction: boolean,
+    private readonly dataSource: FakeDataSource,
+  ) {}
+
+  findOne(options: {
+    where: Partial<T>;
+    lock?: { mode: string };
+  }): Promise<T | null> {
+    if (options.lock) {
+      if (!this.inTransaction) {
+        throw new Error('Pessimistic locks require a transaction');
+      }
+      this.dataSource.locks.push({
+        target: this.target,
+        mode: options.lock.mode,
+      });
+    }
+
+    return Promise.resolve(
+      this.rows().find((row) => this.matches(row, options.where)) ?? null,
+    );
+  }
+
+  find(options: {
+    where: Partial<T>;
+    order?: Partial<Record<keyof T, 'ASC' | 'DESC'>>;
+  }): Promise<T[]> {
+    const matched = this.rows().filter((row) =>
+      this.matches(row, options.where),
+    );
+    const orderKey = options.order
+      ? (Object.keys(options.order)[0] as keyof T)
+      : undefined;
+    if (orderKey) {
+      const direction = options.order![orderKey] === 'DESC' ? -1 : 1;
+      matched.sort((a, b) => {
+        if (a[orderKey] === b[orderKey]) return 0;
+        return a[orderKey] > b[orderKey] ? direction : -direction;
+      });
+    }
+    return Promise.resolve(matched);
+  }
+
+  create(values: Partial<T>): T {
+    return { ...values } as T;
+  }
+
+  save(entity: T): Promise<T> {
+    if (this.dataSource.failSaveTarget === this.target) {
+      throw new Error(`Failed to save ${this.targetName()}`);
+    }
+
+    if (!entity.id) {
+      entity.id = this.dataSource.nextId(this.targetName());
+    }
+
+    const rows = this.rows();
+    const index = rows.findIndex((row) => row.id === entity.id);
+    if (index === -1) {
+      rows.push(entity);
+    } else {
+      rows[index] = entity;
+    }
+    return Promise.resolve(entity);
+  }
+
+  update(where: Partial<T>, partial: Partial<T>): Promise<void> {
+    for (const row of this.rows()) {
+      if (this.matches(row, where)) {
+        Object.assign(row, partial);
+      }
+    }
+    return Promise.resolve();
+  }
+
+  private rows(): T[] {
+    if (this.target === Character) {
+      return this.state.characters as T[];
+    }
+    if (this.target === LocationMonster) {
+      return this.state.locationMonsters as T[];
+    }
+    if (this.target === Hunt) {
+      return this.state.hunts as T[];
+    }
+    if (this.target === HuntEncounter) {
+      return this.state.huntEncounters as T[];
+    }
+    throw new Error(`Unsupported repository ${this.targetName()}`);
+  }
+
+  private matches(row: T, where: Partial<T>): boolean {
+    return Object.entries(where).every(
+      ([key, value]) => row[key as keyof T] === value,
+    );
+  }
+
+  private targetName(): string {
+    return typeof this.target === 'function'
+      ? this.target.name
+      : 'EntitySchema';
+  }
+}
+
+class FakeEntityManager {
+  constructor(
+    private readonly state: FakeState,
+    private readonly dataSource: FakeDataSource,
+  ) {}
+
+  getRepository<T extends { id: string }>(target: EntityTarget<T>) {
+    return new FakeRepository(this.state, target, true, this.dataSource);
+  }
+}
+
+class FakeDataSource {
+  readonly locks: Array<{ target: EntityTarget<unknown>; mode: string }> = [];
+  failSaveTarget?: EntityTarget<unknown>;
+  private readonly idCounters = new Map<string, number>();
+
+  constructor(public state: FakeState) {}
+
+  getRepository<T extends { id: string }>(target: EntityTarget<T>) {
+    return new FakeRepository(this.state, target, false, this);
+  }
+
+  async transaction<T>(
+    work: (manager: EntityManager) => Promise<T>,
+  ): Promise<T> {
+    const draft = structuredClone(this.state);
+    const result = await work(
+      new FakeEntityManager(draft, this) as unknown as EntityManager,
+    );
+    this.state = draft;
+    return result;
+  }
+
+  nextId(targetName: string): string {
+    const next = (this.idCounters.get(targetName) ?? 0) + 1;
+    this.idCounters.set(targetName, next);
+    return `${targetName.toLowerCase()}-generated-${next}`;
+  }
+}
+
+function huntingLocation(): LocationDefinition {
+  return {
+    id: HUNTING_LOCATION_ID,
+    key: 'burned-road',
+    name: 'Verbrannte Strasse',
+    description: 'A burned road.',
+    regionKey: 'ashen-fields',
+    minRecommendedLevel: 1,
+    maxRecommendedLevel: 2,
+    dangerLevel: 1,
+    isSafe: false,
+    huntingEnabled: true,
+    artworkPath: '/assets/locations/burned-road.webp',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    characters: [],
+    outgoingConnections: [],
+    incomingConnections: [],
+  };
+}
+
+function safeLocation(): LocationDefinition {
+  return {
+    id: SAFE_LOCATION_ID,
+    key: 'south-gate',
+    name: 'Suedtor von Graufurt',
+    description: 'A safe gate.',
+    regionKey: 'ashen-fields',
+    minRecommendedLevel: 1,
+    maxRecommendedLevel: 2,
+    dangerLevel: 1,
+    isSafe: true,
+    huntingEnabled: false,
+    artworkPath: '/assets/locations/south-gate.webp',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    characters: [],
+    outgoingConnections: [],
+    incomingConnections: [],
+  };
+}
+
+function character(currentLocation: LocationDefinition): Character {
+  return {
+    id: CHARACTER_ID,
+    name: 'Aric Duskwalker',
+    level: 1,
+    experience: 0,
+    silver: 0,
+    baseHp: 100,
+    baseAttack: 6,
+    currentHp: 100,
+    currentLocationId: currentLocation.id,
+    currentLocation,
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+  };
+}
+
+function monsterDefinition(
+  id: string,
+  key: string,
+  name: string,
+  overrides: Partial<MonsterDefinition> = {},
+): MonsterDefinition {
+  return {
+    id,
+    key,
+    name,
+    level: 1,
+    maxHp: 20,
+    attack: 3,
+    armor: 0,
+    experienceReward: 10,
+    silverMin: 1,
+    silverMax: 3,
+    artworkPath: `/assets/monsters/${key}.webp`,
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  };
+}
+
+function locationMonster(
+  id: string,
+  locationId: string,
+  monster: MonsterDefinition,
+  weight: number,
+  enabled = true,
+): LocationMonster {
+  return {
+    id,
+    locationId,
+    monsterId: monster.id,
+    weight,
+    encounterType: EncounterType.NORMAL,
+    enabled,
+    monster,
+  } as LocationMonster;
+}
+
+function createState(): FakeState {
+  return {
+    characters: [character(safeLocation())],
+    locationMonsters: [],
+    hunts: [],
+    huntEncounters: [],
+  };
+}
+
+function fakeRandomSource(values: number[]): RandomSource {
+  const queue = [...values];
+  return {
+    next: () => {
+      const value = queue.shift();
+      if (value === undefined) {
+        throw new Error('fakeRandomSource exhausted its canned values');
+      }
+      return value;
+    },
+  };
+}
+
+function fakeTravelService(
+  overrides: Partial<TravelService> = {},
+): TravelService {
+  return {
+    completeTravelIfDue: jest.fn().mockResolvedValue({ status: 'IDLE' }),
+    ...overrides,
+  } as unknown as TravelService;
+}
+
+function createService(
+  options: {
+    state?: FakeState;
+    travelService?: TravelService;
+    randomSource?: RandomSource;
+  } = {},
+) {
+  const state = options.state ?? createState();
+  const dataSource = new FakeDataSource(state);
+  const travelService = options.travelService ?? fakeTravelService();
+  const randomSource = options.randomSource ?? fakeRandomSource([]);
+  const service = new HuntingService(
+    dataSource as unknown as DataSource,
+    travelService,
+    randomSource,
+  );
+  return { dataSource, service, travelService, randomSource };
+}
+
+async function expectHuntingDomainError(
+  promise: Promise<unknown>,
+  code: string,
+): Promise<void> {
+  let error: unknown;
+  try {
+    await promise;
+  } catch (cause) {
+    error = cause;
+  }
+  expect(error).toBeInstanceOf(HuntingDomainError);
+  if (!(error instanceof HuntingDomainError)) {
+    throw new Error('Expected HuntingDomainError');
+  }
+  expect(error.code).toBe(code);
+}
+
+describe('HuntingService', () => {
+  it('rejects hunting at a location where hunting is disabled', async () => {
+    const { service } = createService();
+
+    await expectHuntingDomainError(
+      service.startHunt(CHARACTER_ID),
+      'HUNTING_NOT_AVAILABLE',
+    );
+  });
+
+  it('starts a valid hunt with exactly three saved encounters', async () => {
+    const monsterA = monsterDefinition(
+      MONSTER_A_ID,
+      'aschenratte',
+      'Aschenratte',
+    );
+    const monsterB = monsterDefinition(
+      MONSTER_B_ID,
+      'strassenraeuber',
+      'Straßenräuber',
+    );
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.locationMonsters = [
+      locationMonster(LOCATION_MONSTER_A_ID, HUNTING_LOCATION_ID, monsterA, 70),
+      locationMonster(LOCATION_MONSTER_B_ID, HUNTING_LOCATION_ID, monsterB, 30),
+    ];
+    const { dataSource, service } = createService({
+      state,
+      randomSource: fakeRandomSource([0.1, 0.1, 0.1]),
+    });
+
+    const result = await service.startHunt(CHARACTER_ID);
+
+    expect(result.encounters).toHaveLength(3);
+    const encounterIds = new Set(result.encounters.map((e) => e.id));
+    expect(encounterIds.size).toBe(3);
+    expect(result.location).toEqual({
+      id: HUNTING_LOCATION_ID,
+      key: 'burned-road',
+      name: 'Verbrannte Strasse',
+    });
+    expect(dataSource.state.hunts).toHaveLength(1);
+    expect(dataSource.state.hunts[0]).toMatchObject({
+      characterId: CHARACTER_ID,
+      locationId: HUNTING_LOCATION_ID,
+      status: HuntStatus.ACTIVE,
+    });
+    expect(dataSource.state.huntEncounters).toHaveLength(3);
+    expect(dataSource.locks).toEqual([
+      { target: Character, mode: 'pessimistic_write' },
+    ]);
+  });
+
+  it('rejects hunting while the character is still travelling', async () => {
+    const travelService = fakeTravelService({
+      completeTravelIfDue: jest.fn().mockResolvedValue({
+        status: TravelStatus.TRAVELLING,
+        originLocation: { id: SAFE_LOCATION_ID, key: 'south-gate', name: 'x' },
+        targetLocation: {
+          id: HUNTING_LOCATION_ID,
+          key: 'burned-road',
+          name: 'y',
+        },
+        startedAt: new Date(),
+        arrivesAt: new Date(),
+      }) as unknown as TravelService['completeTravelIfDue'],
+    });
+    const { service } = createService({ travelService });
+
+    await expectHuntingDomainError(
+      service.startHunt(CHARACTER_ID),
+      'CHARACTER_TRAVELLING',
+    );
+  });
+
+  it('rejects hunting when the location has no enabled encounter pool', async () => {
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.locationMonsters = [];
+    const { service } = createService({ state });
+
+    await expectHuntingDomainError(
+      service.startHunt(CHARACTER_ID),
+      'NO_HUNT_ENCOUNTERS_AVAILABLE',
+    );
+  });
+
+  it('picks monsters deterministically from canned RandomSource rolls', async () => {
+    const monsterA = monsterDefinition(
+      MONSTER_A_ID,
+      'aschenratte',
+      'Aschenratte',
+    );
+    const monsterB = monsterDefinition(
+      MONSTER_B_ID,
+      'strassenraeuber',
+      'Straßenräuber',
+    );
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.locationMonsters = [
+      locationMonster(LOCATION_MONSTER_A_ID, HUNTING_LOCATION_ID, monsterA, 70),
+      locationMonster(LOCATION_MONSTER_B_ID, HUNTING_LOCATION_ID, monsterB, 30),
+    ];
+    // 0.1*100=10 < 70 -> A ; 0.9*100=90 >= 70 -> B ; 0.1*100=10 < 70 -> A
+    const { dataSource, service } = createService({
+      state,
+      randomSource: fakeRandomSource([0.1, 0.9, 0.1]),
+    });
+
+    const result = await service.startHunt(CHARACTER_ID);
+
+    expect(result.encounters.map((e) => e.monster.key)).toEqual([
+      'aschenratte',
+      'strassenraeuber',
+      'aschenratte',
+    ]);
+    const persisted = [...dataSource.state.huntEncounters].sort(
+      (a, b) => a.position - b.position,
+    );
+    expect(persisted.map((e) => e.monsterDefinitionId)).toEqual([
+      MONSTER_A_ID,
+      MONSTER_B_ID,
+      MONSTER_A_ID,
+    ]);
+  });
+
+  it('supersedes the previous active hunt when a new hunt is started', async () => {
+    const monsterA = monsterDefinition(
+      MONSTER_A_ID,
+      'aschenratte',
+      'Aschenratte',
+    );
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.locationMonsters = [
+      locationMonster(
+        LOCATION_MONSTER_A_ID,
+        HUNTING_LOCATION_ID,
+        monsterA,
+        100,
+      ),
+    ];
+    const { dataSource, service } = createService({
+      state,
+      randomSource: fakeRandomSource([0.1, 0.1, 0.1, 0.1, 0.1, 0.1]),
+    });
+
+    await service.startHunt(CHARACTER_ID);
+    await service.startHunt(CHARACTER_ID);
+
+    expect(dataSource.state.hunts).toHaveLength(2);
+    const [firstHunt, secondHunt] = dataSource.state.hunts;
+    expect(firstHunt.status).toBe(HuntStatus.SUPERSEDED);
+    expect(secondHunt.status).toBe(HuntStatus.ACTIVE);
+    expect(firstHunt.id).not.toBe(secondHunt.id);
+    expect(dataSource.locks).toEqual([
+      { target: Character, mode: 'pessimistic_write' },
+      { target: Character, mode: 'pessimistic_write' },
+    ]);
+  });
+
+  it('gives each encounter its own id matching the monster rolled for that slot', async () => {
+    const monsterA = monsterDefinition(
+      MONSTER_A_ID,
+      'aschenratte',
+      'Aschenratte',
+    );
+    const monsterB = monsterDefinition(
+      MONSTER_B_ID,
+      'strassenraeuber',
+      'Straßenräuber',
+    );
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.locationMonsters = [
+      locationMonster(LOCATION_MONSTER_A_ID, HUNTING_LOCATION_ID, monsterA, 70),
+      locationMonster(LOCATION_MONSTER_B_ID, HUNTING_LOCATION_ID, monsterB, 30),
+    ];
+    const { dataSource, service } = createService({
+      state,
+      randomSource: fakeRandomSource([0.1, 0.9, 0.1]),
+    });
+
+    await service.startHunt(CHARACTER_ID);
+
+    const encounters = [...dataSource.state.huntEncounters].sort(
+      (a, b) => a.position - b.position,
+    );
+    const ids = encounters.map((e) => e.id);
+    expect(new Set(ids).size).toBe(3);
+    expect(encounters[0].monsterDefinitionId).toBe(MONSTER_A_ID);
+    expect(encounters[1].monsterDefinitionId).toBe(MONSTER_B_ID);
+    expect(encounters[2].monsterDefinitionId).toBe(MONSTER_A_ID);
+  });
+
+  it('computes a danger rating per encounter from the real monster stats', async () => {
+    const weakMonster = monsterDefinition(
+      MONSTER_A_ID,
+      'aschenratte',
+      'Aschenratte',
+      {
+        attack: 1,
+        armor: 0,
+        maxHp: 5,
+      },
+    );
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.characters[0].baseAttack = 6;
+    state.characters[0].baseHp = 100;
+    state.locationMonsters = [
+      locationMonster(
+        LOCATION_MONSTER_A_ID,
+        HUNTING_LOCATION_ID,
+        weakMonster,
+        100,
+      ),
+    ];
+    const { service } = createService({
+      state,
+      randomSource: fakeRandomSource([0.1, 0.1, 0.1]),
+    });
+
+    const result = await service.startHunt(CHARACTER_ID);
+
+    for (const encounter of result.encounters) {
+      expect(encounter.dangerRating).toBe(DangerRating.WEAK);
+    }
+  });
+
+  it('marks every freshly rolled encounter as AVAILABLE', async () => {
+    const monsterA = monsterDefinition(
+      MONSTER_A_ID,
+      'aschenratte',
+      'Aschenratte',
+    );
+    const state = createState();
+    state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+    state.characters[0].currentLocation = huntingLocation();
+    state.locationMonsters = [
+      locationMonster(
+        LOCATION_MONSTER_A_ID,
+        HUNTING_LOCATION_ID,
+        monsterA,
+        100,
+      ),
+    ];
+    const { dataSource, service } = createService({
+      state,
+      randomSource: fakeRandomSource([0.1, 0.1, 0.1]),
+    });
+
+    const result = await service.startHunt(CHARACTER_ID);
+
+    expect(result.encounters.map((encounter) => encounter.status)).toEqual([
+      HuntEncounterStatus.AVAILABLE,
+      HuntEncounterStatus.AVAILABLE,
+      HuntEncounterStatus.AVAILABLE,
+    ]);
+    expect(
+      dataSource.state.huntEncounters.map((encounter) => encounter.status),
+    ).toEqual([
+      HuntEncounterStatus.AVAILABLE,
+      HuntEncounterStatus.AVAILABLE,
+      HuntEncounterStatus.AVAILABLE,
+    ]);
+  });
+
+  describe('getActiveHunt', () => {
+    function activeHuntState(
+      statuses: HuntEncounterStatus[],
+      overrides: { huntStatus?: HuntStatus; huntLocationId?: string } = {},
+    ) {
+      const monsterA = monsterDefinition(
+        MONSTER_A_ID,
+        'aschenratte',
+        'Aschenratte',
+      );
+      const state = createState();
+      state.characters[0].currentLocationId = HUNTING_LOCATION_ID;
+      state.characters[0].currentLocation = huntingLocation();
+      state.hunts = [
+        {
+          id: 'hunt-1',
+          characterId: CHARACTER_ID,
+          locationId: overrides.huntLocationId ?? HUNTING_LOCATION_ID,
+          status: overrides.huntStatus ?? HuntStatus.ACTIVE,
+          createdAt: new Date('2026-08-18T09:00:00.000Z'),
+        } as Hunt,
+      ];
+      state.huntEncounters = statuses.map((status, position) =>
+        withMonster(
+          {
+            id: `encounter-${position}`,
+            huntId: 'hunt-1',
+            monsterDefinitionId: MONSTER_A_ID,
+            position,
+            status,
+            createdAt: new Date('2026-08-18T09:00:00.000Z'),
+          } as HuntEncounter,
+          monsterA,
+        ),
+      );
+      return state;
+    }
+
+    it('returns null when the character has no active hunt', async () => {
+      const { service } = createService();
+
+      await expect(service.getActiveHunt(CHARACTER_ID)).resolves.toBeNull();
+    });
+
+    it('returns null when the only hunt has been superseded', async () => {
+      const state = activeHuntState([HuntEncounterStatus.AVAILABLE], {
+        huntStatus: HuntStatus.SUPERSEDED,
+      });
+      const { service } = createService({ state });
+
+      await expect(service.getActiveHunt(CHARACTER_ID)).resolves.toBeNull();
+    });
+
+    it('returns the active hunt with the persisted status of each encounter', async () => {
+      const state = activeHuntState([
+        HuntEncounterStatus.AVAILABLE,
+        HuntEncounterStatus.DEFEATED,
+        HuntEncounterStatus.IN_PROGRESS,
+      ]);
+      const { service } = createService({ state });
+
+      const result = await service.getActiveHunt(CHARACTER_ID);
+
+      expect(result?.id).toBe('hunt-1');
+      expect(result?.location).toEqual({
+        id: HUNTING_LOCATION_ID,
+        key: 'burned-road',
+        name: 'Verbrannte Strasse',
+      });
+      expect(result?.encounters.map((encounter) => encounter.status)).toEqual([
+        HuntEncounterStatus.AVAILABLE,
+        HuntEncounterStatus.DEFEATED,
+        HuntEncounterStatus.IN_PROGRESS,
+      ]);
+      expect(result?.encounters.map((encounter) => encounter.id)).toEqual([
+        'encounter-0',
+        'encounter-1',
+        'encounter-2',
+      ]);
+      expect(result?.encounters[0].monster.key).toBe('aschenratte');
+      expect(result?.encounters[0].dangerRating).toBeDefined();
+    });
+
+    it('returns null once the character has left the hunt location', async () => {
+      const state = activeHuntState([HuntEncounterStatus.AVAILABLE], {
+        huntLocationId: SAFE_LOCATION_ID,
+      });
+      const { service } = createService({ state });
+
+      await expect(service.getActiveHunt(CHARACTER_ID)).resolves.toBeNull();
+    });
+  });
+});

apps/api/src/hunting/hunting.service.ts

@@ -0,0 +1,249 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { DataSource, Repository } from 'typeorm';
+import { Character } from '../characters/entities/character.entity';
+import { LocationMonster } from '../monsters/entities/location-monster.entity';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import type { LocationSummary } from '../travel/travel.service';
+import { TravelService } from '../travel/travel.service';
+import { TravelStatus } from '../travel/travel-status.enum';
+import { calculateDangerRating, DangerRating } from './danger-rating';
+import { Hunt } from './entities/hunt.entity';
+import { HuntEncounter } from './entities/hunt-encounter.entity';
+import { HuntEncounterStatus } from './hunt-encounter-status.enum';
+import { HuntStatus } from './hunt-status.enum';
+import {
+  characterNotFound,
+  characterTravelling,
+  huntingNotAvailable,
+  noHuntEncountersAvailable,
+} from './hunting.errors';
+import { RANDOM_SOURCE } from '../shared/random-source';
+import type { RandomSource } from '../shared/random-source';
+
+export interface MonsterSummary {
+  key: string;
+  name: string;
+  level: number;
+  artworkPath: string;
+}
+
+export interface HuntEncounterDto {
+  id: string;
+  monster: MonsterSummary;
+  dangerRating: DangerRating;
+  status: HuntEncounterStatus;
+}
+
+export interface HuntResultDto {
+  id: string;
+  location: LocationSummary;
+  encounters: HuntEncounterDto[];
+}
+
+const ENCOUNTER_COUNT = 3;
+
+@Injectable()
+export class HuntingService {
+  constructor(
+    private readonly dataSource: DataSource,
+    private readonly travelService: TravelService,
+    @Inject(RANDOM_SOURCE) private readonly randomSource: RandomSource,
+  ) {}
+
+  async startHunt(characterId: string): Promise<HuntResultDto> {
+    const travel = await this.travelService.completeTravelIfDue(characterId);
+    if (travel.status === TravelStatus.TRAVELLING) {
+      throw characterTravelling();
+    }
+
+    const characters = this.dataSource.getRepository(Character);
+    const character = await characters.findOne({
+      where: { id: characterId },
+      relations: { currentLocation: true },
+    });
+    if (!character) {
+      // completeTravelIfDue already validated the character exists; this
+      // guard only protects against a pathological race and satisfies the
+      // type checker (currentLocation would otherwise be possibly undefined).
+      throw characterNotFound();
+    }
+
+    if (!character.currentLocation.huntingEnabled) {
+      throw huntingNotAvailable();
+    }
+
+    const locationMonsters = this.dataSource.getRepository(LocationMonster);
+    const pool = await locationMonsters.find({
+      where: { locationId: character.currentLocationId, enabled: true },
+      relations: { monster: true },
+    });
+    if (pool.length === 0) {
+      throw noHuntEncountersAvailable();
+    }
+
+    return this.dataSource.transaction(async (manager) => {
+      const txCharacters = manager.getRepository(Character);
+      const txHunts = manager.getRepository(Hunt);
+      const txEncounters = manager.getRepository(HuntEncounter);
+
+      const lockedCharacter = await this.lockCharacter(
+        txCharacters,
+        characterId,
+      );
+
+      await txHunts.update(
+        { characterId, status: HuntStatus.ACTIVE },
+        { status: HuntStatus.SUPERSEDED },
+      );
+
+      const hunt = txHunts.create({
+        characterId,
+        locationId: lockedCharacter.currentLocationId,
+        status: HuntStatus.ACTIVE,
+      });
+      await txHunts.save(hunt);
+
+      const pickedMonsters = this.rollEncounters(pool, ENCOUNTER_COUNT);
+
+      const encounterDtos: HuntEncounterDto[] = [];
+      for (let position = 0; position < pickedMonsters.length; position += 1) {
+        const monster = pickedMonsters[position];
+        const encounter = txEncounters.create({
+          huntId: hunt.id,
+          monsterDefinitionId: monster.id,
+          position,
+          status: HuntEncounterStatus.AVAILABLE,
+        });
+        await txEncounters.save(encounter);
+
+        encounterDtos.push(this.toEncounterDto(encounter, monster, character));
+      }
+
+      return {
+        id: hunt.id,
+        location: this.toLocationSummary(character.currentLocation),
+        encounters: encounterDtos,
+      };
+    });
+  }
+
+  /**
+   * The hunt the player can still act on, or null if there is none. A hunt
+   * is only resumable where it was rolled, so travelling away retires it and
+   * the player has to search the new area instead.
+   */
+  async getActiveHunt(characterId: string): Promise<HuntResultDto | null> {
+    const characters = this.dataSource.getRepository(Character);
+    const character = await characters.findOne({
+      where: { id: characterId },
+      relations: { currentLocation: true },
+    });
+    if (!character) {
+      throw characterNotFound();
+    }
+
+    const hunts = this.dataSource.getRepository(Hunt);
+    const hunt = await hunts.findOne({
+      where: {
+        characterId,
+        status: HuntStatus.ACTIVE,
+        locationId: character.currentLocationId,
+      },
+    });
+    if (!hunt) {
+      return null;
+    }
+
+    const huntEncounters = this.dataSource.getRepository(HuntEncounter);
+    const encounters = await huntEncounters.find({
+      where: { huntId: hunt.id },
+      relations: { monster: true },
+      order: { position: 'ASC' },
+    });
+
+    return {
+      id: hunt.id,
+      location: this.toLocationSummary(character.currentLocation),
+      encounters: encounters.map((encounter) =>
+        this.toEncounterDto(encounter, encounter.monster, character),
+      ),
+    };
+  }
+
+  private toEncounterDto(
+    encounter: HuntEncounter,
+    monster: MonsterDefinition,
+    character: Character,
+  ): HuntEncounterDto {
+    return {
+      id: encounter.id,
+      monster: {
+        key: monster.key,
+        name: monster.name,
+        level: monster.level,
+        artworkPath: monster.artworkPath,
+      },
+      dangerRating: calculateDangerRating(
+        { attack: character.baseAttack, armor: 0, hp: character.baseHp },
+        { attack: monster.attack, armor: monster.armor, hp: monster.maxHp },
+      ),
+      status: encounter.status,
+    };
+  }
+
+  /**
+   * Rolls `count` independent weighted picks from `pool`. Each slot walks
+   * the pool in the order it was supplied, accumulating weight, and picks
+   * the first entry whose cumulative weight exceeds the roll
+   * (roll < cumulative). Pure and deterministic given a RandomSource, so
+   * it is trivially unit-testable with canned `next()` values.
+   */
+  private rollEncounters(
+    pool: LocationMonster[],
+    count: number,
+  ): MonsterDefinition[] {
+    const totalWeight = pool.reduce((sum, entry) => sum + entry.weight, 0);
+    const picks: MonsterDefinition[] = [];
+    for (let i = 0; i < count; i += 1) {
+      const roll = this.randomSource.next() * totalWeight;
+      let cumulative = 0;
+      let picked: LocationMonster = pool[pool.length - 1];
+      for (const entry of pool) {
+        cumulative += entry.weight;
+        if (roll < cumulative) {
+          picked = entry;
+          break;
+        }
+      }
+      picks.push(picked.monster);
+    }
+    return picks;
+  }
+
+  private async lockCharacter(
+    characters: Repository<Character>,
+    characterId: string,
+  ): Promise<Character> {
+    const character = await characters.findOne({
+      where: { id: characterId },
+      lock: { mode: 'pessimistic_write' },
+    });
+    if (!character) {
+      // The pre-transaction load above already confirmed the character
+      // exists; a miss here would only occur under a pathological
+      // concurrent deletion, which the schema's RESTRICT FKs prevent.
+      throw characterNotFound();
+    }
+    return character;
+  }
+
+  private toLocationSummary(
+    location: Character['currentLocation'],
+  ): LocationSummary {
+    return {
+      id: location.id,
+      key: location.key,
+      name: location.name,
+    };
+  }
+}

apps/api/src/items/entities/character-item.entity.ts

@@ -0,0 +1,51 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { ItemDefinition } from './item-definition.entity';
+
+/**
+ * One stack of one item definition owned by one character.
+ *
+ * Duplicate drops increment `quantity` (spec §28 allows duplicates and forbids
+ * duplicate protection). Slice 0.5 equips a `CharacterItem.id`, never an
+ * `ItemDefinition.id`.
+ */
+@Entity({ name: 'character_items' })
+@Index('IDX_character_items_character_item', ['characterId', 'itemDefinitionId'], {
+  unique: true,
+})
+export class CharacterItem {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'character_id', type: 'uuid' })
+  characterId!: string;
+
+  @Column({ name: 'item_definition_id', type: 'uuid' })
+  itemDefinitionId!: string;
+
+  @Column({ name: 'quantity', type: 'integer' })
+  quantity!: number;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+
+  @ManyToOne(() => Character, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'character_id' })
+  character!: Character;
+
+  @ManyToOne(() => ItemDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'item_definition_id' })
+  itemDefinition!: ItemDefinition;
+}

apps/api/src/items/entities/item-definition.entity.ts

@@ -0,0 +1,74 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { EquipmentSlot } from '../equipment-slot.enum';
+import { ItemRarity } from '../item-rarity.enum';
+import { ItemType } from '../item-type.enum';
+
+@Entity({ name: 'item_definitions' })
+@Index('IDX_item_definitions_key', ['key'], { unique: true })
+export class ItemDefinition {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'key', type: 'varchar', length: 100 })
+  key!: string;
+
+  @Column({ name: 'name', type: 'varchar', length: 150 })
+  name!: string;
+
+  @Column({ name: 'description', type: 'text' })
+  description!: string;
+
+  @Column({ name: 'type', type: 'enum', enum: ItemType, enumName: 'item_type_enum' })
+  type!: ItemType;
+
+  @Column({
+    name: 'equipment_slot',
+    type: 'enum',
+    enum: EquipmentSlot,
+    enumName: 'equipment_slot_enum',
+    nullable: true,
+  })
+  equipmentSlot!: EquipmentSlot | null;
+
+  @Column({ name: 'rarity', type: 'enum', enum: ItemRarity, enumName: 'item_rarity_enum' })
+  rarity!: ItemRarity;
+
+  @Column({ name: 'tier', type: 'integer' })
+  tier!: number;
+
+  @Column({ name: 'required_level', type: 'integer' })
+  requiredLevel!: number;
+
+  @Column({ name: 'weapon_damage', type: 'integer' })
+  weaponDamage!: number;
+
+  @Column({ name: 'bonus_hp', type: 'integer' })
+  bonusHp!: number;
+
+  @Column({ name: 'bonus_attack', type: 'integer' })
+  bonusAttack!: number;
+
+  @Column({ name: 'bonus_armor', type: 'integer' })
+  bonusArmor!: number;
+
+  // Always 0 in Slice 0.4: there are no merchants, and the balancing doc's
+  // Grenzmarken table lists purchase prices, not sell prices.
+  @Column({ name: 'sell_price', type: 'integer' })
+  sellPrice!: number;
+
+  @Column({ name: 'icon_path', type: 'varchar', length: 255 })
+  iconPath!: string;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+}

apps/api/src/items/equipment-slot.enum.ts

@@ -0,0 +1,10 @@
+// Slice 0.4 only stores the slot as content data. Slice 0.5 makes it functional.
+export enum EquipmentSlot {
+  WEAPON = 'WEAPON',
+  HEAD = 'HEAD',
+  CHEST = 'CHEST',
+  HANDS = 'HANDS',
+  LEGS = 'LEGS',
+  FEET = 'FEET',
+  AMULET = 'AMULET',
+}

apps/api/src/items/item-rarity.enum.ts

@@ -0,0 +1,7 @@
+// Mirrors docs/Ashen_Realms_Balancing_Items_Loot_Design_V1.md §19:
+// Gewöhnlich / Selten / Episch. German labels live in the frontend.
+export enum ItemRarity {
+  COMMON = 'COMMON',
+  RARE = 'RARE',
+  EPIC = 'EPIC',
+}

apps/api/src/items/item-type.enum.ts

@@ -0,0 +1,6 @@
+export enum ItemType {
+  WEAPON = 'WEAPON',
+  ARMOR = 'ARMOR',
+  MATERIAL = 'MATERIAL',
+  CONSUMABLE = 'CONSUMABLE',
+}

apps/api/src/loot/entities/loot-table-entry.entity.ts

@@ -0,0 +1,63 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { ItemDefinition } from '../../items/entities/item-definition.entity';
+import { LootTable } from './loot-table.entity';
+
+/**
+ * One independently rolled drop (spec §17).
+ *
+ * `position` fixes the roll order so injected randoms are predictable in tests;
+ * it is content ordering, not priority. A guaranteed drop is simply
+ * `dropChance = 1.0000` — no extra mechanism needed (spec §14).
+ */
+@Entity({ name: 'loot_table_entries' })
+@Index('IDX_loot_table_entries_table_position', ['lootTableId', 'position'], { unique: true })
+@Index('IDX_loot_table_entries_table_item', ['lootTableId', 'itemDefinitionId'], { unique: true })
+export class LootTableEntry {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'loot_table_id', type: 'uuid' })
+  lootTableId!: string;
+
+  @Column({ name: 'item_definition_id', type: 'uuid' })
+  itemDefinitionId!: string;
+
+  @Column({ name: 'position', type: 'integer' })
+  position!: number;
+
+  // PostgreSQL numeric arrives as a string, like LocationConnection.ambushChance.
+  @Column({ name: 'drop_chance', type: 'numeric', precision: 5, scale: 4 })
+  dropChance!: string;
+
+  @Column({ name: 'min_quantity', type: 'integer' })
+  minQuantity!: number;
+
+  @Column({ name: 'max_quantity', type: 'integer' })
+  maxQuantity!: number;
+
+  @Column({ name: 'enabled', type: 'boolean' })
+  enabled!: boolean;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+
+  @ManyToOne(() => LootTable, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'loot_table_id' })
+  lootTable!: LootTable;
+
+  @ManyToOne(() => ItemDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'item_definition_id' })
+  itemDefinition!: ItemDefinition;
+}

apps/api/src/loot/entities/loot-table.entity.ts

@@ -0,0 +1,27 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+
+@Entity({ name: 'loot_tables' })
+@Index('IDX_loot_tables_key', ['key'], { unique: true })
+export class LootTable {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'key', type: 'varchar', length: 100 })
+  key!: string;
+
+  @Column({ name: 'name', type: 'varchar', length: 150 })
+  name!: string;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+}

apps/api/src/loot/loot.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { RANDOM_SOURCE, systemRandomSource } from '../shared/random-source';
+import { LootTable } from './entities/loot-table.entity';
+import { LootTableEntry } from './entities/loot-table-entry.entity';
+import { LootService } from './loot.service';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([LootTable, LootTableEntry])],
+  providers: [LootService, { provide: RANDOM_SOURCE, useValue: systemRandomSource }],
+  exports: [LootService],
+})
+export class LootModule {}

apps/api/src/loot/loot.service.spec.ts

@@ -0,0 +1,128 @@
+import { DataSource } from 'typeorm';
+import type { RandomSource } from '../shared/random-source';
+import { LootTableEntry } from './entities/loot-table-entry.entity';
+import { LootService } from './loot.service';
+
+const ASH_RAT_TABLE = '60000000-0000-4000-8000-000000000001';
+const ASH_PELT = '50000000-0000-4000-8000-00000000000c';
+const WORN_SHORT_SWORD = '50000000-0000-4000-8000-000000000001';
+
+function entry(overrides: Partial<LootTableEntry>): LootTableEntry {
+  return {
+    id: 'entry-1',
+    lootTableId: ASH_RAT_TABLE,
+    itemDefinitionId: ASH_PELT,
+    position: 1,
+    dropChance: '0.6000',
+    minQuantity: 1,
+    maxQuantity: 1,
+    enabled: true,
+    createdAt: new Date('2026-08-19T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-19T09:00:00.000Z'),
+    ...overrides,
+  } as LootTableEntry;
+}
+
+// Hands out the queued values in order, so a test states exactly which roll
+// each value answers.
+function queuedRandom(...values: number[]): RandomSource {
+  let index = 0;
+  return {
+    next: () => {
+      if (index >= values.length) {
+        throw new Error('LootService consumed more random values than the test queued');
+      }
+      return values[index++];
+    },
+  };
+}
+
+function dataSourceWith(entries: LootTableEntry[]): DataSource {
+  return {
+    getRepository: jest.fn(() => ({
+      find: jest.fn(async (options: { where: { lootTableId: string; enabled: boolean } }) =>
+        entries
+          .filter(
+            (candidate) =>
+              candidate.lootTableId === options.where.lootTableId &&
+              candidate.enabled === options.where.enabled,
+          )
+          .sort((a, b) => a.position - b.position),
+      ),
+    })),
+  } as unknown as DataSource;
+}
+
+describe('LootService', () => {
+  const ashRatEntries = [
+    entry({ id: 'entry-pelt', itemDefinitionId: ASH_PELT, position: 1, dropChance: '0.6000' }),
+    entry({
+      id: 'entry-sword',
+      itemDefinitionId: WORN_SHORT_SWORD,
+      position: 2,
+      dropChance: '0.0800',
+    }),
+  ];
+
+  it('drops an entry when the roll falls under its chance', async () => {
+    const service = new LootService(dataSourceWith(ashRatEntries), queuedRandom(0.59, 0.07));
+
+    await expect(service.rollLoot(ASH_RAT_TABLE)).resolves.toEqual({
+      items: [
+        { itemDefinitionId: ASH_PELT, quantity: 1 },
+        { itemDefinitionId: WORN_SHORT_SWORD, quantity: 1 },
+      ],
+    });
+  });
+
+  it('skips an entry when the roll lands on or above its chance', async () => {
+    const service = new LootService(dataSourceWith(ashRatEntries), queuedRandom(0.6, 0.08));
+
+    await expect(service.rollLoot(ASH_RAT_TABLE)).resolves.toEqual({ items: [] });
+  });
+
+  it('rolls each entry independently, so one combat can drop only the second item', async () => {
+    const service = new LootService(dataSourceWith(ashRatEntries), queuedRandom(0.9, 0.01));
+
+    await expect(service.rollLoot(ASH_RAT_TABLE)).resolves.toEqual({
+      items: [{ itemDefinitionId: WORN_SHORT_SWORD, quantity: 1 }],
+    });
+  });
+
+  it('rolls entries in position order so injected values stay predictable', async () => {
+    const outOfOrder = [
+      entry({ id: 'entry-sword', itemDefinitionId: WORN_SHORT_SWORD, position: 2, dropChance: '1.0000' }),
+      entry({ id: 'entry-pelt', itemDefinitionId: ASH_PELT, position: 1, dropChance: '0.0000' }),
+    ];
+    const service = new LootService(dataSourceWith(outOfOrder), queuedRandom(0.5, 0.5));
+
+    await expect(service.rollLoot(ASH_RAT_TABLE)).resolves.toEqual({
+      items: [{ itemDefinitionId: WORN_SHORT_SWORD, quantity: 1 }],
+    });
+  });
+
+  it('ignores disabled entries', async () => {
+    const service = new LootService(
+      dataSourceWith([entry({ dropChance: '1.0000', enabled: false })]),
+      queuedRandom(),
+    );
+
+    await expect(service.rollLoot(ASH_RAT_TABLE)).resolves.toEqual({ items: [] });
+  });
+
+  it('consumes no quantity roll when min and max match, and one when they differ', async () => {
+    const stackable = [entry({ dropChance: '1.0000', minQuantity: 2, maxQuantity: 4 })];
+    // First value drops the entry, second picks the quantity (0.5 -> 3).
+    const service = new LootService(dataSourceWith(stackable), queuedRandom(0.1, 0.5));
+
+    await expect(service.rollLoot(ASH_RAT_TABLE)).resolves.toEqual({
+      items: [{ itemDefinitionId: ASH_PELT, quantity: 3 }],
+    });
+  });
+
+  it('returns nothing for a monster without a loot table', async () => {
+    const service = new LootService(dataSourceWith(ashRatEntries), queuedRandom());
+
+    await expect(service.rollLoot(null)).resolves.toEqual({ items: [] });
+  });
+});

apps/api/src/loot/loot.service.ts

@@ -0,0 +1,66 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { DataSource, EntityManager } from 'typeorm';
+import { RANDOM_SOURCE } from '../shared/random-source';
+import type { RandomSource } from '../shared/random-source';
+import { rollInclusive } from '../shared/roll-range';
+import { LootTableEntry } from './entities/loot-table-entry.entity';
+
+export interface LootRollItem {
+  itemDefinitionId: string;
+  quantity: number;
+}
+
+export interface LootRollResult {
+  items: LootRollItem[];
+}
+
+@Injectable()
+export class LootService {
+  constructor(
+    private readonly dataSource: DataSource,
+    @Inject(RANDOM_SOURCE) private readonly randomSource: RandomSource,
+  ) {}
+
+  /**
+   * Rolls a loot table without persisting anything (spec §20).
+   *
+   * Every enabled entry is one independent roll in `position` order, so a
+   * single combat may yield nothing, one item, or several (spec §17). The
+   * quantity roll is skipped entirely when `minQuantity === maxQuantity`,
+   * which keeps the random sequence stable for the seeded content.
+   */
+  async rollLoot(
+    lootTableId: string | null,
+    manager?: EntityManager,
+  ): Promise<LootRollResult> {
+    if (!lootTableId) {
+      return { items: [] };
+    }
+
+    const entries = await (
+      manager?.getRepository(LootTableEntry) ??
+      this.dataSource.getRepository(LootTableEntry)
+    ).find({
+      where: { lootTableId, enabled: true },
+      order: { position: 'ASC' },
+    });
+
+    const items: LootRollItem[] = [];
+    for (const entry of entries) {
+      if (this.randomSource.next() >= Number(entry.dropChance)) {
+        continue;
+      }
+
+      items.push({
+        itemDefinitionId: entry.itemDefinitionId,
+        quantity: rollInclusive(
+          this.randomSource,
+          entry.minQuantity,
+          entry.maxQuantity,
+        ),
+      });
+    }
+
+    return { items };
+  }
+}

apps/api/src/main.ts

@@ -1,8 +1,19 @@
+import { config } from 'dotenv';
+import { resolve } from 'path';
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
+import { configureApplication } from './app.config';
+
+// `dev:api` runs via the `apps/api` npm workspace, so process.cwd() is
+// `apps/api`, not the repo root where the documented `.env` lives. Resolve
+// it explicitly so `npm run dev:api` picks up `DATABASE_URL` after
+// `Copy-Item .env.example .env` as documented in the README.
+config({ path: resolve(__dirname, '..', '..', '..', '.env') });
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
+  configureApplication(app);
+  app.enableShutdownHooks();
   await app.listen(process.env.PORT ?? 3000);
 }
 bootstrap();

apps/api/src/monsters/entities/encounter-type.enum.ts

@@ -0,0 +1,6 @@
+export enum EncounterType {
+  NORMAL = 'NORMAL',
+  RARE = 'RARE',
+  ELITE = 'ELITE',
+  BOSS = 'BOSS',
+}

apps/api/src/monsters/entities/location-monster.entity.ts

@@ -0,0 +1,45 @@
+import {
+  Column,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+import { EncounterType } from './encounter-type.enum';
+import { MonsterDefinition } from './monster-definition.entity';
+
+@Entity({ name: 'location_monsters' })
+export class LocationMonster {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'location_id', type: 'uuid' })
+  locationId!: string;
+
+  @Column({ name: 'monster_id', type: 'uuid' })
+  monsterId!: string;
+
+  @Column({ name: 'weight', type: 'integer' })
+  weight!: number;
+
+  @Column({
+    name: 'encounter_type',
+    type: 'enum',
+    enum: EncounterType,
+    enumName: 'location_monster_encounter_type_enum',
+    default: EncounterType.NORMAL,
+  })
+  encounterType!: EncounterType;
+
+  @Column({ name: 'enabled', type: 'boolean', default: true })
+  enabled!: boolean;
+
+  @ManyToOne(() => LocationDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'location_id' })
+  location!: LocationDefinition;
+
+  @ManyToOne(() => MonsterDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'monster_id' })
+  monster!: MonsterDefinition;
+}

apps/api/src/monsters/entities/monster-definition.entity.ts

@@ -0,0 +1,61 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { LootTable } from '../../loot/entities/loot-table.entity';
+
+@Entity({ name: 'monster_definitions' })
+@Index('IDX_monster_definitions_key', ['key'], { unique: true })
+export class MonsterDefinition {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'key', type: 'varchar', length: 100 })
+  key!: string;
+
+  @Column({ name: 'name', type: 'varchar', length: 150 })
+  name!: string;
+
+  @Column({ name: 'level', type: 'integer' })
+  level!: number;
+
+  @Column({ name: 'max_hp', type: 'integer' })
+  maxHp!: number;
+
+  @Column({ name: 'attack', type: 'integer' })
+  attack!: number;
+
+  @Column({ name: 'armor', type: 'integer' })
+  armor!: number;
+
+  @Column({ name: 'experience_reward', type: 'integer' })
+  experienceReward!: number;
+
+  @Column({ name: 'silver_min', type: 'integer' })
+  silverMin!: number;
+
+  @Column({ name: 'silver_max', type: 'integer' })
+  silverMax!: number;
+
+  @Column({ name: 'artwork_path', type: 'varchar', length: 255 })
+  artworkPath!: string;
+
+  @Column({ name: 'loot_table_id', type: 'uuid', nullable: true })
+  lootTableId!: string | null;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+
+  @ManyToOne(() => LootTable, { onDelete: 'RESTRICT', nullable: true })
+  @JoinColumn({ name: 'loot_table_id' })
+  lootTable!: LootTable | null;
+}

apps/api/src/rewards/combat-reward.service.spec.ts

@@ -0,0 +1,445 @@
+import { EntityManager, EntityTarget } from 'typeorm';
+import { Character } from '../characters/entities/character.entity';
+import { CombatStatus } from '../combat/combat-status.enum';
+import { Combat } from '../combat/entities/combat.entity';
+import { CharacterItem } from '../items/entities/character-item.entity';
+import { ItemDefinition } from '../items/entities/item-definition.entity';
+import { ItemRarity } from '../items/item-rarity.enum';
+import { ItemType } from '../items/item-type.enum';
+import { LootService } from '../loot/loot.service';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import type { RandomSource } from '../shared/random-source';
+import { CombatRewardService } from './combat-reward.service';
+import { CombatReward } from './entities/combat-reward.entity';
+import { CombatRewardItem } from './entities/combat-reward-item.entity';
+import { RewardDomainError } from './rewards.errors';
+
+const CHARACTER_ID = '10000000-0000-4000-8000-000000000001';
+const COMBAT_ID = '20000000-0000-4000-8000-000000000001';
+const ASH_RAT_ID = '30000000-0000-4000-8000-000000000001';
+const ROAD_BANDIT_ID = '30000000-0000-4000-8000-000000000002';
+const ASH_RAT_TABLE = '60000000-0000-4000-8000-000000000001';
+const ROAD_BANDIT_TABLE = '60000000-0000-4000-8000-000000000002';
+const BANDIT_BLADE = '50000000-0000-4000-8000-000000000002';
+const BANDIT_HOOD = '50000000-0000-4000-8000-000000000001';
+
+interface State {
+  characters: Character[];
+  monsters: MonsterDefinition[];
+  itemDefinitions: ItemDefinition[];
+  characterItems: CharacterItem[];
+  combatRewards: CombatReward[];
+  combatRewardItems: CombatRewardItem[];
+}
+
+class FakeRepository<T extends { id: string }> {
+  constructor(
+    private readonly rows: T[],
+    private readonly prefix: string,
+  ) {}
+
+  findOne(options: { where: Partial<T> }): Promise<T | null> {
+    return Promise.resolve(this.rows.find((row) => this.matches(row, options.where)) ?? null);
+  }
+
+  findOneBy(where: Partial<T>): Promise<T | null> {
+    return Promise.resolve(this.rows.find((row) => this.matches(row, where)) ?? null);
+  }
+
+  find(options: {
+    where: Partial<T>;
+    order?: Partial<Record<keyof T, 'ASC' | 'DESC'>>;
+  }): Promise<T[]> {
+    const matched = this.rows.filter((row) => this.matches(row, options.where));
+    if (!options.order) {
+      return Promise.resolve(matched);
+    }
+
+    // Mirrors TypeORM's `order` clause so tests can prove ordering comes from
+    // the query, not from insertion order happening to line up.
+    const [key, direction] = Object.entries(options.order)[0] as [keyof T, 'ASC' | 'DESC'];
+    const sorted = [...matched].sort((a, b) => {
+      const left = a[key];
+      const right = b[key];
+      const comparison = left < right ? -1 : left > right ? 1 : 0;
+      return direction === 'DESC' ? -comparison : comparison;
+    });
+    return Promise.resolve(sorted);
+  }
+
+  create(values: Partial<T>): T {
+    return { ...values } as T;
+  }
+
+  save(entity: T): Promise<T> {
+    if (!entity.id) {
+      entity.id = `${this.prefix}-${this.rows.length + 1}`;
+    }
+    const index = this.rows.findIndex((row) => row.id === entity.id);
+    if (index === -1) {
+      this.rows.push(entity);
+    } else {
+      this.rows[index] = entity;
+    }
+    return Promise.resolve(entity);
+  }
+
+  private matches(row: T, where: Partial<T>): boolean {
+    return Object.entries(where).every(([key, value]) => row[key as keyof T] === value);
+  }
+}
+
+function fakeManager(state: State): EntityManager {
+  return {
+    getRepository: <T extends { id: string }>(target: EntityTarget<T>) => {
+      if (target === Character) return new FakeRepository(state.characters, 'character') as never;
+      if (target === MonsterDefinition) return new FakeRepository(state.monsters, 'monster') as never;
+      if (target === ItemDefinition)
+        return new FakeRepository(state.itemDefinitions, 'definition') as never;
+      if (target === CharacterItem)
+        return new FakeRepository(state.characterItems, 'character-item') as never;
+      if (target === CombatReward)
+        return new FakeRepository(state.combatRewards, 'reward') as never;
+      if (target === CombatRewardItem)
+        return new FakeRepository(state.combatRewardItems, 'reward-item') as never;
+      throw new Error('Unsupported repository');
+    },
+  } as unknown as EntityManager;
+}
+
+function combat(overrides: Partial<Combat> = {}): Combat {
+  return {
+    id: COMBAT_ID,
+    characterId: CHARACTER_ID,
+    monsterDefinitionId: ASH_RAT_ID,
+    status: CombatStatus.WON,
+    round: 4,
+    ...overrides,
+  } as Combat;
+}
+
+function createState(overrides: Partial<State> = {}): State {
+  return {
+    characters: [{ id: CHARACTER_ID, experience: 12, silver: 3 } as Character],
+    monsters: [
+      {
+        id: ASH_RAT_ID,
+        key: 'ash-rat',
+        experienceReward: 8,
+        silverMin: 4,
+        silverMax: 7,
+        lootTableId: ASH_RAT_TABLE,
+      } as MonsterDefinition,
+      {
+        id: ROAD_BANDIT_ID,
+        key: 'road-bandit',
+        experienceReward: 16,
+        silverMin: 9,
+        silverMax: 15,
+        lootTableId: ROAD_BANDIT_TABLE,
+      } as MonsterDefinition,
+    ],
+    itemDefinitions: [
+      {
+        id: BANDIT_BLADE,
+        key: 'bandit-blade',
+        name: 'Räuberklinge',
+        type: ItemType.WEAPON,
+        rarity: ItemRarity.COMMON,
+        iconPath: '/images/items/bandit-blade.png',
+      } as ItemDefinition,
+    ],
+    characterItems: [],
+    combatRewards: [],
+    combatRewardItems: [],
+    ...overrides,
+  };
+}
+
+function fakeDataSource(state: State): EntityManager {
+  // `loadRewards`'s no-manager branch only calls `getRepository`, which
+  // `fakeManager` already implements identically for `DataSource`; reusing
+  // it (rather than duplicating the repository-resolution switch) keeps this
+  // fake backed by the exact same `state` rows as the transactional path.
+  return fakeManager(state);
+}
+
+function fakeLoot(...items: Array<{ itemDefinitionId: string; quantity: number }>): LootService {
+  return { rollLoot: jest.fn().mockResolvedValue({ items }) } as unknown as LootService;
+}
+
+function fixedRandom(value: number): RandomSource {
+  return { next: () => value };
+}
+
+function service(
+  state: State,
+  loot: LootService = fakeLoot(),
+  random: RandomSource = fixedRandom(0.5),
+): CombatRewardService {
+  return new CombatRewardService({} as never, loot, random);
+}
+
+describe('CombatRewardService', () => {
+  describe('eligibility', () => {
+    it('rejects an ACTIVE combat', async () => {
+      const state = createState();
+
+      await expect(
+        service(state).grantVictoryRewards(fakeManager(state), combat({ status: CombatStatus.ACTIVE })),
+      ).rejects.toMatchObject({ code: 'COMBAT_NOT_WON' });
+      expect(state.combatRewards).toHaveLength(0);
+      expect(state.characters[0].experience).toBe(12);
+      expect(state.characters[0].silver).toBe(3);
+    });
+
+    it('rejects a LOST combat', async () => {
+      const state = createState();
+
+      await expect(
+        service(state).grantVictoryRewards(fakeManager(state), combat({ status: CombatStatus.LOST })),
+      ).rejects.toBeInstanceOf(RewardDomainError);
+      expect(state.combatRewards).toHaveLength(0);
+    });
+
+    it('grants rewards for a WON combat', async () => {
+      const state = createState();
+
+      const reward = await service(state).grantVictoryRewards(fakeManager(state), combat());
+
+      expect(reward).toEqual({ experience: 8, silver: 6, items: [] });
+      expect(state.combatRewards).toHaveLength(1);
+    });
+  });
+
+  describe('Aschenratte', () => {
+    it('grants 8 XP and a silver roll inside 4-7, persisted on the character', async () => {
+      const state = createState();
+
+      const reward = await service(state, fakeLoot(), fixedRandom(0)).grantVictoryRewards(
+        fakeManager(state),
+        combat(),
+      );
+
+      expect(reward.experience).toBe(8);
+      expect(reward.silver).toBe(4);
+      expect(state.characters[0].experience).toBe(20);
+      expect(state.characters[0].silver).toBe(7);
+    });
+
+    it('rolls the top of the silver range from the top of the random range', async () => {
+      const state = createState();
+
+      const reward = await service(state, fakeLoot(), fixedRandom(0.99)).grantVictoryRewards(
+        fakeManager(state),
+        combat(),
+      );
+
+      expect(reward.silver).toBe(7);
+    });
+  });
+
+  describe('Straßenräuber', () => {
+    const banditCombat = combat({ monsterDefinitionId: ROAD_BANDIT_ID });
+
+    it('grants 16 XP and a silver roll inside 9-15', async () => {
+      const state = createState();
+
+      const reward = await service(state, fakeLoot(), fixedRandom(0)).grantVictoryRewards(
+        fakeManager(state),
+        banditCombat,
+      );
+
+      expect(reward.experience).toBe(16);
+      expect(reward.silver).toBe(9);
+    });
+
+    it('persists a dropped Räuberklinge as a CharacterItem and references it in the reward', async () => {
+      const state = createState();
+
+      const reward = await service(
+        state,
+        fakeLoot({ itemDefinitionId: BANDIT_BLADE, quantity: 1 }),
+      ).grantVictoryRewards(fakeManager(state), banditCombat);
+
+      expect(state.characterItems).toEqual([
+        expect.objectContaining({
+          characterId: CHARACTER_ID,
+          itemDefinitionId: BANDIT_BLADE,
+          quantity: 1,
+        }),
+      ]);
+      expect(reward.items).toEqual([
+        {
+          characterItemId: state.characterItems[0].id,
+          item: {
+            key: 'bandit-blade',
+            name: 'Räuberklinge',
+            rarity: ItemRarity.COMMON,
+            iconPath: '/images/items/bandit-blade.png',
+          },
+          quantity: 1,
+        },
+      ]);
+      expect(state.combatRewardItems).toHaveLength(1);
+    });
+
+    it('reports no items when the Räuberklinge does not drop', async () => {
+      const state = createState();
+
+      const reward = await service(state, fakeLoot()).grantVictoryRewards(
+        fakeManager(state),
+        banditCombat,
+      );
+
+      expect(reward.items).toEqual([]);
+      expect(state.characterItems).toHaveLength(0);
+      expect(state.combatRewardItems).toHaveLength(0);
+    });
+
+    it('stacks a duplicate drop onto the existing CharacterItem without duplicate protection', async () => {
+      const state = createState({
+        characterItems: [
+          {
+            id: 'character-item-existing',
+            characterId: CHARACTER_ID,
+            itemDefinitionId: BANDIT_BLADE,
+            quantity: 1,
+          } as CharacterItem,
+        ],
+      });
+
+      const reward = await service(
+        state,
+        fakeLoot({ itemDefinitionId: BANDIT_BLADE, quantity: 1 }),
+      ).grantVictoryRewards(fakeManager(state), banditCombat);
+
+      expect(state.characterItems).toHaveLength(1);
+      expect(state.characterItems[0].quantity).toBe(2);
+      // The reward reports what THIS combat granted, not the stack total.
+      expect(reward.items[0].quantity).toBe(1);
+    });
+  });
+
+  describe('idempotency', () => {
+    it('grants once and returns the same persisted reward on a repeat call', async () => {
+      const state = createState();
+      const loot = fakeLoot({ itemDefinitionId: BANDIT_BLADE, quantity: 1 });
+      const subject = service(state, loot, fixedRandom(0));
+      const manager = fakeManager(state);
+
+      const first = await subject.grantVictoryRewards(manager, combat());
+      const second = await subject.grantVictoryRewards(manager, combat());
+
+      expect(second).toEqual(first);
+      expect(state.combatRewards).toHaveLength(1);
+      expect(state.combatRewardItems).toHaveLength(1);
+      expect(state.characterItems).toHaveLength(1);
+      expect(state.characterItems[0].quantity).toBe(1);
+      expect(state.characters[0].experience).toBe(20);
+      expect(state.characters[0].silver).toBe(7);
+      expect(loot.rollLoot).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('loadRewards', () => {
+    it('returns null for a combat that was never rewarded', async () => {
+      const state = createState();
+
+      await expect(
+        service(state).loadRewards(COMBAT_ID, fakeManager(state)),
+      ).resolves.toBeNull();
+    });
+
+    it('replays the persisted reward without rerolling', async () => {
+      const state = createState();
+      const loot = fakeLoot({ itemDefinitionId: BANDIT_BLADE, quantity: 1 });
+      const subject = service(state, loot, fixedRandom(0));
+      const manager = fakeManager(state);
+      const granted = await subject.grantVictoryRewards(manager, combat());
+
+      const replayed = await subject.loadRewards(COMBAT_ID, manager);
+
+      expect(replayed).toEqual(granted);
+      expect(loot.rollLoot).toHaveBeenCalledTimes(1);
+    });
+
+    it('reads a persisted reward through the injected DataSource when no manager is passed', async () => {
+      const state = createState();
+      const loot = fakeLoot({ itemDefinitionId: BANDIT_BLADE, quantity: 1 });
+      const dataSource = fakeDataSource(state);
+      const subject = new CombatRewardService(dataSource as never, loot, fixedRandom(0));
+      const manager = fakeManager(state);
+
+      const granted = await subject.grantVictoryRewards(manager, combat());
+
+      // No manager argument: this is the non-transactional read the next
+      // task uses to render a reward screen.
+      const replayed = await subject.loadRewards(COMBAT_ID);
+
+      expect(replayed).toEqual(granted);
+    });
+  });
+
+  describe('failure handling', () => {
+    it('throws instead of half-granting when a rolled item definition is missing', async () => {
+      const state = createState();
+
+      await expect(
+        service(state, fakeLoot({ itemDefinitionId: 'missing-item', quantity: 1 })).grantVictoryRewards(
+          fakeManager(state),
+          combat(),
+        ),
+      ).rejects.toMatchObject({ code: 'REWARD_STATE_INVALID' });
+      expect(state.combatRewardItems).toHaveLength(0);
+      // Every rolled item definition is resolved before any mutation, so a
+      // missing one must leave no reward row and no character grant behind.
+      expect(state.combatRewards).toHaveLength(0);
+      expect(state.characters[0].experience).toBe(12);
+      expect(state.characters[0].silver).toBe(3);
+    });
+  });
+
+  describe('item order', () => {
+    it('orders items by itemDefinitionId in the immediate grant and the replayed reward, regardless of roll order', async () => {
+      const state = createState({
+        itemDefinitions: [
+          {
+            id: BANDIT_BLADE,
+            key: 'bandit-blade',
+            name: 'Räuberklinge',
+            type: ItemType.WEAPON,
+            rarity: ItemRarity.COMMON,
+            iconPath: '/images/items/bandit-blade.png',
+          } as ItemDefinition,
+          {
+            id: BANDIT_HOOD,
+            key: 'bandit-hood',
+            name: 'Räuberkapuze',
+            type: ItemType.ARMOR,
+            rarity: ItemRarity.COMMON,
+            iconPath: '/images/items/bandit-hood.png',
+          } as ItemDefinition,
+        ],
+      });
+      const banditCombat = combat({ monsterDefinitionId: ROAD_BANDIT_ID });
+      // Roll order is blade-then-hood, but BANDIT_HOOD's id sorts before
+      // BANDIT_BLADE's, so this only passes if both response paths sort by
+      // itemDefinitionId rather than returning rows in roll/insertion order.
+      const loot = fakeLoot(
+        { itemDefinitionId: BANDIT_BLADE, quantity: 1 },
+        { itemDefinitionId: BANDIT_HOOD, quantity: 1 },
+      );
+      const subject = service(state, loot, fixedRandom(0));
+      const manager = fakeManager(state);
+
+      const granted = await subject.grantVictoryRewards(manager, banditCombat);
+      const replayed = await subject.loadRewards(banditCombat.id, manager);
+
+      const expectedKeys = ['bandit-hood', 'bandit-blade'];
+      expect(granted.items.map((item) => item.item.key)).toEqual(expectedKeys);
+      expect(replayed?.items.map((item) => item.item.key)).toEqual(expectedKeys);
+      expect(replayed).toEqual(granted);
+    });
+  });
+});

apps/api/src/rewards/combat-reward.service.ts

@@ -0,0 +1,244 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { DataSource, EntityManager } from 'typeorm';
+import { Character } from '../characters/entities/character.entity';
+import { CombatStatus } from '../combat/combat-status.enum';
+import { Combat } from '../combat/entities/combat.entity';
+import { CharacterItem } from '../items/entities/character-item.entity';
+import { ItemDefinition } from '../items/entities/item-definition.entity';
+import { ItemRarity } from '../items/item-rarity.enum';
+import { LootService } from '../loot/loot.service';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { RANDOM_SOURCE } from '../shared/random-source';
+import type { RandomSource } from '../shared/random-source';
+import { rollInclusive } from '../shared/roll-range';
+import { CombatReward } from './entities/combat-reward.entity';
+import { CombatRewardItem } from './entities/combat-reward-item.entity';
+import { combatNotWon, rewardStateInvalid } from './rewards.errors';
+
+export interface CombatRewardItemDto {
+  characterItemId: string;
+  item: {
+    key: string;
+    name: string;
+    rarity: ItemRarity;
+    iconPath: string;
+  };
+  quantity: number;
+}
+
+export interface CombatRewardDto {
+  experience: number;
+  silver: number;
+  items: CombatRewardItemDto[];
+}
+
+// Both DataSource and EntityManager expose this; naming it keeps the read path
+// usable inside and outside a transaction without a union type.
+type RepositoryScope = Pick<DataSource, 'getRepository'>;
+
+@Injectable()
+export class CombatRewardService {
+  constructor(
+    private readonly dataSource: DataSource,
+    private readonly lootService: LootService,
+    @Inject(RANDOM_SOURCE) private readonly randomSource: RandomSource,
+  ) {}
+
+  /**
+   * Grants a won combat's rewards exactly once (spec §7, §21).
+   *
+   * Runs inside the caller's transaction — `CombatService.performAction`
+   * already holds a pessimistic write lock on the combat row — so either
+   * everything below commits or nothing does.
+   *
+   * Roll order is fixed: silver first, then the loot table in `position`
+   * order. Tests depend on it.
+   */
+  async grantVictoryRewards(
+    manager: EntityManager,
+    combat: Combat,
+  ): Promise<CombatRewardDto> {
+    if (combat.status !== CombatStatus.WON) {
+      throw combatNotWon();
+    }
+
+    const rewards = manager.getRepository(CombatReward);
+    const existing = await rewards.findOne({ where: { combatId: combat.id } });
+    if (existing) {
+      // Already rewarded: replay rather than roll again.
+      return this.toDto(manager, existing);
+    }
+
+    const monster = await manager
+      .getRepository(MonsterDefinition)
+      .findOneBy({ id: combat.monsterDefinitionId });
+    if (!monster) {
+      throw rewardStateInvalid();
+    }
+
+    const experience = monster.experienceReward;
+    const silver = rollInclusive(
+      this.randomSource,
+      monster.silverMin,
+      monster.silverMax,
+    );
+    const roll = await this.lootService.rollLoot(monster.lootTableId, manager);
+
+    // Resolve every rolled item definition up front, before any mutation, so
+    // a missing definition throws `rewardStateInvalid()` before the
+    // character's XP/silver are touched or a `CombatReward` row is created.
+    // This keeps a failed grant from leaving partial writes behind.
+    const definitions = manager.getRepository(ItemDefinition);
+    const resolvedDefinitions = new Map<string, ItemDefinition>();
+    for (const rolled of roll.items) {
+      if (resolvedDefinitions.has(rolled.itemDefinitionId)) {
+        continue;
+      }
+      const definition = await definitions.findOneBy({
+        id: rolled.itemDefinitionId,
+      });
+      if (!definition) {
+        throw rewardStateInvalid();
+      }
+      resolvedDefinitions.set(rolled.itemDefinitionId, definition);
+    }
+
+    const characters = manager.getRepository(Character);
+    const character = await characters.findOne({
+      where: { id: combat.characterId },
+      lock: { mode: 'pessimistic_write' },
+    });
+    if (!character) {
+      throw rewardStateInvalid();
+    }
+    character.experience += experience;
+    character.silver += silver;
+    await characters.save(character);
+
+    const reward = await rewards.save(
+      rewards.create({
+        combatId: combat.id,
+        characterId: combat.characterId,
+        experienceGranted: experience,
+        silverGranted: silver,
+      }),
+    );
+
+    const characterItems = manager.getRepository(CharacterItem);
+    const rewardItems = manager.getRepository(CombatRewardItem);
+    const granted: Array<{ itemDefinitionId: string; dto: CombatRewardItemDto }> = [];
+
+    for (const rolled of roll.items) {
+      const definition = resolvedDefinitions.get(rolled.itemDefinitionId)!;
+
+      const existingStack = await characterItems.findOne({
+        where: {
+          characterId: combat.characterId,
+          itemDefinitionId: rolled.itemDefinitionId,
+        },
+        lock: { mode: 'pessimistic_write' },
+      });
+      // Duplicates stack; Slice 0.4 adds no duplicate protection (spec §28).
+      const characterItem = existingStack
+        ? Object.assign(existingStack, {
+            quantity: existingStack.quantity + rolled.quantity,
+          })
+        : characterItems.create({
+            characterId: combat.characterId,
+            itemDefinitionId: rolled.itemDefinitionId,
+            quantity: rolled.quantity,
+          });
+      await characterItems.save(characterItem);
+
+      await rewardItems.save(
+        rewardItems.create({
+          combatRewardId: reward.id,
+          characterItemId: characterItem.id,
+          itemDefinitionId: definition.id,
+          quantity: rolled.quantity,
+        }),
+      );
+
+      granted.push({
+        itemDefinitionId: rolled.itemDefinitionId,
+        dto: this.toItemDto(characterItem.id, definition, rolled.quantity),
+      });
+    }
+
+    // The immediate response and a later `loadRewards` replay must agree on
+    // item order; both sort on the same stable key (itemDefinitionId, which
+    // `toDto`'s query also orders by) rather than roll order.
+    granted.sort((a, b) => a.itemDefinitionId.localeCompare(b.itemDefinitionId));
+    const items = granted.map((entry) => entry.dto);
+
+    return { experience, silver, items };
+  }
+
+  /** Reads a persisted reward so a refresh replays it (spec §25, §48). */
+  async loadRewards(
+    combatId: string,
+    manager?: EntityManager,
+  ): Promise<CombatRewardDto | null> {
+    const scope: RepositoryScope = manager ?? this.dataSource;
+    const reward = await scope
+      .getRepository(CombatReward)
+      .findOne({ where: { combatId } });
+
+    return reward ? this.toDto(scope, reward) : null;
+  }
+
+  private async toDto(
+    scope: RepositoryScope,
+    reward: CombatReward,
+  ): Promise<CombatRewardDto> {
+    // Ordered by itemDefinitionId to agree with the sort `grantVictoryRewards`
+    // applies to its own response — the immediate grant and a later replay
+    // must list items identically.
+    const rewardItems = await scope
+      .getRepository(CombatRewardItem)
+      .find({
+        where: { combatRewardId: reward.id },
+        order: { itemDefinitionId: 'ASC' },
+      });
+    const definitions = scope.getRepository(ItemDefinition);
+
+    const items: CombatRewardItemDto[] = [];
+    for (const rewardItem of rewardItems) {
+      const definition = await definitions.findOneBy({
+        id: rewardItem.itemDefinitionId,
+      });
+      if (!definition) {
+        // combat_reward_items.item_definition_id is a RESTRICT FK.
+        throw rewardStateInvalid();
+      }
+      items.push(
+        this.toItemDto(rewardItem.characterItemId, definition, rewardItem.quantity),
+      );
+    }
+
+    return {
+      experience: reward.experienceGranted,
+      silver: reward.silverGranted,
+      items,
+    };
+  }
+
+  private toItemDto(
+    characterItemId: string,
+    definition: ItemDefinition,
+    quantity: number,
+  ): CombatRewardItemDto {
+    // Drop chance, roll results, and loot-table ids never leave the server
+    // (spec §26).
+    return {
+      characterItemId,
+      item: {
+        key: definition.key,
+        name: definition.name,
+        rarity: definition.rarity,
+        iconPath: definition.iconPath,
+      },
+      quantity,
+    };
+  }
+}

apps/api/src/rewards/entities/combat-reward-item.entity.ts

@@ -0,0 +1,56 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { CharacterItem } from '../../items/entities/character-item.entity';
+import { ItemDefinition } from '../../items/entities/item-definition.entity';
+import { CombatReward } from './combat-reward.entity';
+
+/**
+ * What this specific combat dropped.
+ *
+ * Needed because `CharacterItem.quantity` is a running stack total: after a
+ * duplicate drop it no longer says how much *this* victory granted, and a
+ * refreshed reward screen must replay the original result (spec §25, §48).
+ */
+@Entity({ name: 'combat_reward_items' })
+@Index('IDX_combat_reward_items_reward', ['combatRewardId'])
+@Index('IDX_combat_reward_items_reward_item', ['combatRewardId', 'itemDefinitionId'], {
+  unique: true,
+})
+export class CombatRewardItem {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'combat_reward_id', type: 'uuid' })
+  combatRewardId!: string;
+
+  @Column({ name: 'character_item_id', type: 'uuid' })
+  characterItemId!: string;
+
+  @Column({ name: 'item_definition_id', type: 'uuid' })
+  itemDefinitionId!: string;
+
+  @Column({ name: 'quantity', type: 'integer' })
+  quantity!: number;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @ManyToOne(() => CombatReward, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'combat_reward_id' })
+  combatReward!: CombatReward;
+
+  @ManyToOne(() => CharacterItem, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'character_item_id' })
+  characterItem!: CharacterItem;
+
+  @ManyToOne(() => ItemDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'item_definition_id' })
+  itemDefinition!: ItemDefinition;
+}

apps/api/src/rewards/entities/combat-reward.entity.ts

@@ -0,0 +1,48 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { Combat } from '../../combat/entities/combat.entity';
+
+/**
+ * Proof that one combat has already been rewarded (spec §8).
+ *
+ * The unique index on `combatId` is the database half of the idempotency
+ * invariant; `CombatRewardService` is the service half.
+ */
+@Entity({ name: 'combat_rewards' })
+@Index('IDX_combat_rewards_combat', ['combatId'], { unique: true })
+@Index('IDX_combat_rewards_character', ['characterId'])
+export class CombatReward {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'combat_id', type: 'uuid' })
+  combatId!: string;
+
+  @Column({ name: 'character_id', type: 'uuid' })
+  characterId!: string;
+
+  @Column({ name: 'experience_granted', type: 'integer' })
+  experienceGranted!: number;
+
+  @Column({ name: 'silver_granted', type: 'integer' })
+  silverGranted!: number;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @ManyToOne(() => Combat, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'combat_id' })
+  combat!: Combat;
+
+  @ManyToOne(() => Character, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'character_id' })
+  character!: Character;
+}

apps/api/src/rewards/rewards.errors.ts

@@ -0,0 +1,29 @@
+import { HttpException, HttpStatus } from '@nestjs/common';
+
+export type RewardErrorCode = 'COMBAT_NOT_WON' | 'REWARD_STATE_INVALID';
+
+export class RewardDomainError extends HttpException {
+  constructor(
+    public readonly code: RewardErrorCode,
+    status: HttpStatus,
+    message: string,
+  ) {
+    super({ statusCode: status, code, message }, status);
+  }
+}
+
+export function combatNotWon(): RewardDomainError {
+  return new RewardDomainError(
+    'COMBAT_NOT_WON',
+    HttpStatus.CONFLICT,
+    'Only a won combat can grant victory rewards.',
+  );
+}
+
+export function rewardStateInvalid(): RewardDomainError {
+  return new RewardDomainError(
+    'REWARD_STATE_INVALID',
+    HttpStatus.INTERNAL_SERVER_ERROR,
+    'The reward references unavailable data.',
+  );
+}

apps/api/src/rewards/rewards.module.ts

@@ -0,0 +1,31 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { Character } from '../characters/entities/character.entity';
+import { CharacterItem } from '../items/entities/character-item.entity';
+import { ItemDefinition } from '../items/entities/item-definition.entity';
+import { LootModule } from '../loot/loot.module';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { RANDOM_SOURCE, systemRandomSource } from '../shared/random-source';
+import { CombatRewardService } from './combat-reward.service';
+import { CombatReward } from './entities/combat-reward.entity';
+import { CombatRewardItem } from './entities/combat-reward-item.entity';
+
+@Module({
+  imports: [
+    TypeOrmModule.forFeature([
+      Character,
+      CharacterItem,
+      ItemDefinition,
+      MonsterDefinition,
+      CombatReward,
+      CombatRewardItem,
+    ]),
+    LootModule,
+  ],
+  providers: [
+    CombatRewardService,
+    { provide: RANDOM_SOURCE, useValue: systemRandomSource },
+  ],
+  exports: [CombatRewardService],
+})
+export class RewardsModule {}

apps/api/src/shared/random-source.ts

@@ -0,0 +1,9 @@
+export interface RandomSource {
+  next(): number; // uniform value in [0, 1)
+}
+
+export const RANDOM_SOURCE = Symbol('RANDOM_SOURCE');
+
+export const systemRandomSource: RandomSource = {
+  next: () => Math.random(),
+};

apps/api/src/shared/roll-range.spec.ts

@@ -0,0 +1,28 @@
+import type { RandomSource } from './random-source';
+import { rollInclusive } from './roll-range';
+
+function fixed(...values: number[]): RandomSource {
+  let index = 0;
+  return { next: () => values[index++] };
+}
+
+describe('rollInclusive', () => {
+  it('maps the bottom of the random range to min and the top to max', () => {
+    expect(rollInclusive(fixed(0), 4, 7)).toBe(4);
+    expect(rollInclusive(fixed(0.999), 4, 7)).toBe(7);
+  });
+
+  it('spreads the random range evenly across every value in between', () => {
+    expect(rollInclusive(fixed(0.25), 4, 7)).toBe(5);
+    expect(rollInclusive(fixed(0.5), 4, 7)).toBe(6);
+    expect(rollInclusive(fixed(0.5), 9, 15)).toBe(12);
+  });
+
+  it('never exceeds max even if the source yields exactly 1', () => {
+    expect(rollInclusive(fixed(1), 9, 15)).toBe(15);
+  });
+
+  it('returns the single value when min equals max', () => {
+    expect(rollInclusive(fixed(0.7), 1, 1)).toBe(1);
+  });
+});

apps/api/src/shared/roll-range.ts

@@ -0,0 +1,19 @@
+import type { RandomSource } from './random-source';
+
+/**
+ * Rolls an inclusive integer in [min, max] from one value of `random`.
+ *
+ * `RandomSource.next()` is documented as [0, 1), but the clamp keeps a
+ * misbehaving or hand-stubbed source from ever exceeding `max`.
+ */
+export function rollInclusive(
+  random: RandomSource,
+  min: number,
+  max: number,
+): number {
+  if (max <= min) {
+    return min;
+  }
+
+  return Math.min(max, min + Math.floor(random.next() * (max - min + 1)));
+}

apps/api/src/travel/clock.ts

@@ -0,0 +1,9 @@
+export const CLOCK = Symbol('CLOCK');
+
+export interface Clock {
+  now(): Date;
+}
+
+export const systemClock: Clock = {
+  now: () => new Date(),
+};

apps/api/src/travel/dto/start-travel.dto.ts

@@ -0,0 +1,6 @@
+import { IsUUID } from 'class-validator';
+
+export class StartTravelDto {
+  @IsUUID()
+  targetLocationId!: string;
+}

apps/api/src/travel/entities/travel.entity.ts

@@ -0,0 +1,55 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
+import { TravelStatus } from '../travel-status.enum';
+
+@Entity({ name: 'travels' })
+export class Travel {
+  @PrimaryGeneratedColumn('uuid', { name: 'id' })
+  id!: string;
+
+  @Column({ name: 'character_id', type: 'uuid' })
+  characterId!: string;
+
+  @Column({ name: 'origin_location_id', type: 'uuid' })
+  originLocationId!: string;
+
+  @Column({ name: 'target_location_id', type: 'uuid' })
+  targetLocationId!: string;
+
+  @Column({ name: 'started_at', type: 'timestamptz' })
+  startedAt!: Date;
+
+  @Column({ name: 'arrives_at', type: 'timestamptz' })
+  arrivesAt!: Date;
+
+  @Column({
+    name: 'status',
+    type: 'enum',
+    enum: TravelStatus,
+    enumName: 'travel_status_enum',
+  })
+  status!: TravelStatus;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @ManyToOne(() => Character, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'character_id' })
+  character!: Character;
+
+  @ManyToOne(() => LocationDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'origin_location_id' })
+  originLocation!: LocationDefinition;
+
+  @ManyToOne(() => LocationDefinition, { onDelete: 'RESTRICT' })
+  @JoinColumn({ name: 'target_location_id' })
+  targetLocation!: LocationDefinition;
+}

apps/api/src/travel/travel-status.enum.ts

@@ -0,0 +1,4 @@
+export enum TravelStatus {
+  TRAVELLING = 'TRAVELLING',
+  COMPLETED = 'COMPLETED',
+}

apps/api/src/travel/travel.controller.spec.ts

@@ -0,0 +1,48 @@
+import { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { configureApplication } from '../app.config';
+import { TravelController } from './travel.controller';
+import { TravelService } from './travel.service';
+
+describe('TravelController request validation', () => {
+  let app: INestApplication<App>;
+
+  beforeEach(async () => {
+    const module = await Test.createTestingModule({
+      controllers: [TravelController],
+      providers: [
+        {
+          provide: TravelService,
+          useValue: {
+            startTravel: () => Promise.resolve({ status: 'TRAVELLING' }),
+            completeTravelIfDue: () => Promise.resolve({ status: 'IDLE' }),
+          },
+        },
+      ],
+    }).compile();
+
+    app = module.createNestApplication<App>();
+    configureApplication(app);
+    await app.init();
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+
+  it('rejects server-owned travel timing and duration fields', async () => {
+    await request(app.getHttpServer())
+      .post('/api/travel')
+      .send({
+        targetLocationId: BURNED_ROAD_ID,
+        startedAt: '2026-08-18T10:00:00.000Z',
+        arrivesAt: '2026-08-18T10:00:10.000Z',
+        travelDurationSeconds: 10,
+      })
+      .expect(400);
+  });
+});
+
+const BURNED_ROAD_ID = '20000000-0000-4000-8000-000000000002';