Merge GUI background music into develop

Per-room OGG Vorbis background music in the Swing GUI: a testable MusicController
(idempotent track switch, null->silence, OFF disables) over an isolated
OggMusicBackend (vorbisspi/jorbis, streamed PCM, ~400ms gain fades, graceful on
missing files). Driven from GameIO.setMusic per turn (console no-op) and a new
persisted Music level (Off/Low/Med/High, default Medium) in Settings. Tracks come
from an external gitignored music/ folder via an optional rooms.yaml `music:`
field. Console stays silent.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Semesterprojekt/.gitignore

@@ -36,4 +36,13 @@ build/
 .vscode/
 
 ### Mac OS ###
-.DS_Store.superpowers/
+.DS_Store
+
+### Brainstorming visual companion ###
+.superpowers/
+
+# Local save games and settings
+saves/
+
+# External background-music files (not bundled)
+music/

Semesterprojekt/README.md

@@ -46,6 +46,8 @@ mvn exec:java@gui   # Swing-GUI    (thb.jeanluc.adventure.AppGui)
 |---|---|---|
 | `go <richtung>` | `move`, `walk` | In eine Himmelsrichtung gehen |
 | `look` | `l` | Aktuellen Raum beschreiben |
+| `map` | `m` | Karte der erkundeten Räume anzeigen |
+| `quests` | `log`, `journal` | Aktive und erledigte Quests anzeigen |
 | `inventory` | `inv`, `i` | Inventar anzeigen |
 | `take <item>` | `pick`, `get` | Gegenstand aufnehmen |
 | `drop <item>` | `put` | Gegenstand ablegen |

Semesterprojekt/docs/enhancement-ideas.md

@@ -17,7 +17,13 @@ alle Phasen 1–7 grün. Ziel: deutlich mehr Tiefe und Politur.
 
 ## Themenblöcke
 
-### 1. Reichere Präsentation / Ausgabe-Schicht
+### 1. Reichere Präsentation / Ausgabe-Schicht  ✅ umgesetzt (Branch `feature/presentation-layer`)
+
+> Umgesetzt: semantisches Modell (`io.text`), `ConsoleIO` (ANSI + Box-Drawing,
+> Color/Glyph-Modi), `SwingIO` (4 Regionen, `JTextPane`, gebündelter Font,
+> HiDPI-Skalierung + Zoom `Strg +/-/0`), HUD pro Zug, Welcome-Banner. 79 Tests grün.
+> Spec/Plan unter `docs/superpowers/`. Karte/Menü/Save/Musik weiterhin offen.
+
 
 - Weg vom reinen `write(String)`: formatierte Ausgabe (Überschriften, Trenner,
   Hervorhebungen für Items/NPCs/Richtungen).
@@ -26,6 +32,19 @@ alle Phasen 1–7 grün. Ziel: deutlich mehr Tiefe und Politur.
 - **GUI (Swing)**: mehr als ein `JTextArea` – Farben, Stile, evtl. Panels,
   Statusanzeige, Bilder/Icons.
 
+**Festgelegt (Zielbild Konsole):** Stufe **B als Baseline** (Boxed Heading,
+gelabelte Sektionen, persistente HUD-Zeile: Ort · Gold · Zug · Licht), **ASCII-Art
+nur für große Momente** (Spielstart, Finale, Schlüsselräume). Semantische
+Farb-Rollen: Items / NPCs / Exits / Heading / Gefahr.
+
+**Designprinzipien:**
+- **Nicht überladen / Progressive Disclosure** – Raumeintritt zeigt nur das
+  Wesentliche (Ort, kurze Beschreibung, Auffälliges); Details auf Abruf
+  (`examine`, `look`).
+- **Info auf Regionen verteilen statt Text stapeln** – die **Karte ersetzt die
+  „Exits:"-Zeile**. GUI: persistentes Map-Panel macht die Exit-Zeile überflüssig.
+  Konsole: kompakte Mini-Map (bei `map` bzw. knapp beim Raumeintritt).
+
 ### 2. Nerd Fonts / Glyphen – das Installationsproblem
 
 - Nerd-Font-Glyphen (Icons) sehen gut aus, müssen aber auf dem System des
@@ -37,7 +56,14 @@ alle Phasen 1–7 grün. Ziel: deutlich mehr Tiefe und Politur.
   - **Konsole**: Font nicht kontrollierbar → gestufte Fallbacks
     (reines ASCII → Unicode-Box-Drawing → Nerd-Glyphen) statt harter Annahme.
 
-### 3. Karte / Map
+### 3. Karte / Map  ✅ umgesetzt (Branch `feature/map`)
+
+> Umgesetzt: `MapLayout` (BFS-Gitter-Layout + Fog of War), `MapView`-Modell,
+> GUI-`MapPanel` (Graphics2D, ersetzt die Exit-Liste), Konsolen-ASCII via
+> `AsciiMap` + `map`-Befehl, Besuchte-Räume-Tracking auf `Player`, Map-Push pro Zug.
+> Item/NPC-Marker und Türen-Styling offen (Quest-Teilprojekt). Spec/Plan unter
+> `docs/superpowers/`.
+
 
 - Übersichtskarte der Räume – in **beiden** Modi.
 - Konsole: ASCII-Map. GUI: gezeichnete Map (Grid/Graph).
@@ -52,10 +78,31 @@ alle Phasen 1–7 grün. Ziel: deutlich mehr Tiefe und Politur.
 
 ### 5. Quest-System (NPC-Ausbau)
 
+> ✅ Fundament umgesetzt (Branch `feature/quest-foundation`): World-Flags +
+> Condition/Effect-Engine, verschlossene Exits, zustandsabhängige Beschreibungen,
+> bedingte Dialoge, Reaktionen mit requires/effects, Schalter-Effekte. Demo:
+> Generator schaltet Strom → Keller-Tür öffnet + Raum wird beleuchtet.
+>
+> ✅ #3.2 umgesetzt (Branch `feature/quests`): condition-driven Quests
+> (Quest/QuestStage), QuestEngine mit Auto-Advance + Ansagen, START_QUEST-Effekt,
+> Konsolen-Befehl `quests` und GUI-Quest-Box unter der Karte. Demo-Quest
+> `restore_power`.
+>
+> ✅ #3.3 umgesetzt (Branch `feature/endings`): priorisierte, condition-driven
+> Enden (`endings.yaml`) + End-Screen mit Summary (Züge, Quests X/Y, Rang).
+> Demo: Sieg-Ende (`manor_secured`) und Flucht-Ende (Front Door → `fled`).
+> **Damit ist das Quest-System (#3) komplett.** Offen: Licht/Dunkelheit &
+> Item-Kombination sowie #4 Content-Ausbau.
+
+
 - Aktuelles NPC-System: Begrüßung + Geschenk-Reaktion (Item → Item).
 - Ausbau Richtung: mehrstufige Quests, Bedingungen, NPC-"Memory" (Zustand),
   Quest-Log, evtl. Win-Condition daran gekoppelt.
 
+**GUI-Layout (festgelegt):** Quest-Log als **dauerhaft sichtbare Box unterhalb der
+Karte** im rechten Seitenbereich (Map oben, Quests darunter). Gehört zu Quest-
+Teilprojekt #2 (Quest-Log); das Fundament #1 reserviert/plant den Slot.
+
 ### 5b. Spielkern: zentraler Bogen + Mechanik-Spine
 
 **Leitidee (bestätigt):** Bewusst *kondensiert* – wenige Mechaniken, die sich
@@ -75,9 +122,19 @@ des Bogens; einzelne Teilziele schalten je den nächsten Bereich frei.
    Hebel/Ventile setzen Flags und öffnen Bereiche.
 3. **Licht & Dunkelheit** – dunkle Räume brauchen eine brennende Lichtquelle,
    sonst keine Sicht auf Exits/Items (Atmosphäre, einfach umzusetzen).
+   > ✅ Umgesetzt (Branch `feature/light-darkness`): `Room.dark` + `Item.light`,
+   > `Light`-Helper, Gating in go/look/take/examine (Modell B: kein Eintritt ohne
+   > Licht), HUD-Licht verdrahtet. Demo: dunkler Dungeon braucht die brennende
+   > Lampe für den Generator.
 4. **Item-Kombination** – z.B. `match + candle → lit candle`. Achtung: v1.0 hat
    bewusst argloses `use X` ohne Targets gewählt → Command-Grammatik muss erweitert
    werden (jetzt erlaubt, da über MVP hinaus).
+   > ✅ umgesetzt (Branch `feature/use-x-on-y`): `use X on Y` als datengetriebene
+   > Rezepte (`combinations.yaml`: requires/consume/produce/effects/response/failText),
+   > Operanden aus Inventar oder Raum, reihenfolge-unabhängiger Paar-Key. Kein
+   > Parser-Eingriff (`on`/`with`/`to` sind bereits Filler). Selbst-Kombination
+   > (a==b) wird beim Laden abgelehnt. Demo: `matches` + `torch` → `lit_torch`
+   > (dauerhafte Lichtquelle).
 5. **Quest-Ketten + mehrere Enden** – Teilziele referenzieren Flags; Kette
    abschließen = Win; *welche* Flags gesetzt sind, entscheidet das Ende.
 
@@ -93,6 +150,13 @@ vorerst puzzle-fokussiert ohne Survival-Druck.
 
 ### 6. Hauptmenü & Settings
 
+> ✅ umgesetzt (Branch `feature/main-menu-save-load`). Hauptmenü-Shell oberhalb
+> des Game-Loops (Neues Spiel / Laden / Einstellungen / Beenden) über neue
+> `GameIO.choose`-Primitive (Konsole: nummeriertes Menü; GUI: Buttons).
+> **Minimale Settings**: nur Farb-Modus + Glyphen-Modus (ASCII/Unicode), live
+> umschaltbar, in `saves/settings.json` persistiert. Musik-/Typewriter-Toggles
+> weiter zurückgestellt (Features existieren noch nicht).
+
 - **Hauptmenü** vor der Spielschleife: *Neues Spiel*, *Spiel laden*, *Einstellungen*, *Beenden*.
 - **Spielstände-Liste**: gespeicherte Spiele mit Metadaten (Name, Raum, Zugzahl,
   Zeitstempel) anzeigen und hineinladen.
@@ -103,12 +167,27 @@ vorerst puzzle-fokussiert ohne Survival-Druck.
 
 ### 7. Speichern / Laden
 
+> ✅ umgesetzt (Branch `feature/main-menu-save-load`). JSON-Spielstand als
+> Delta über die frisch aus YAML geladene Welt (`SaveData`/`SaveCodec`/
+> `SaveService`, atomare Writes). **Ein aktiver Slot**: manuelles `save`,
+> Autosave (Quest-Completion + alle 10 Züge) und `quit`/`menu` (speichern +
+> zurück ins Menü) schreiben denselben Slot; Laden nur über das Menü.
+> `saves/` ist gitignored.
+
 - Spielstand serialisieren (Player-Zustand, Inventar, World-Flags, besuchte Räume,
   Quest-Fortschritt) – Format z.B. YAML/JSON.
 - Mehrere Speicherstände, benennbar; Anbindung an die Spielstände-Liste im Menü.
 
 ### 8. Musik (GUI)
 
+> ✅ umgesetzt (Branch `feature/music`): OGG Vorbis (vorbisspi/jorbis), pro Raum
+> via `music:`-Feld in `rooms.yaml`, externer gitignored `music/`-Ordner (nicht im
+> JAR). Idempotenter Track-Wechsel mit ~400 ms Fades; Räume ohne `music` blenden zu
+> Stille; gleicher Track läuft nahtlos weiter. Music-Stufe Off/Low/Med/High in den
+> Settings (Default Medium), persistiert. Konsole stumm. Testbarer `MusicController`
+> über isoliertes `OggMusicBackend`; fehlende Datei → still, kein Absturz. Siehe
+> `docs/music.md`.
+
 - Hintergrundmusik **nur in der GUI**.
 - **Pro Raum definierbar via YAML**: in `rooms.yaml` ein optionales Feld
   (z.B. `music: <dateiname>`), Dateien in *einem* Ordner.
@@ -124,6 +203,19 @@ vorerst puzzle-fokussiert ohne Survival-Druck.
 
 ## Festgelegte Erweiterungs-Entscheidungen
 
+> ✅ **Pathfinding** umgesetzt (Branch `feature/pathfinding-go-to`): `go to <raum>`
+> per BFS über besuchte Räume (Locks + Licht beachtet), via `GoCommand`
+> (Richtung vs. Raumziel). Konsole still + Zusammenfassung (Start/Mitte/Ziel),
+> GUI-Minikarte animiert pro Schritt (`GameIO.travelStep`, ~300 ms).
+> **Trie-Autocomplete** weiterhin für eine spätere Runde zurückgestellt.
+
+> ✅ **Tutorial** umgesetzt (Branch `feature/tutorial`): interaktiver Walkthrough
+> beim Neuen Spiel (look→examine→take→inventory→use→go→go to), verb-/alias-basierte
+> Abschluss-Erkennung (Bewegungs-Schritte verlangen echten Raumwechsel),
+> Abschluss-Tipps, jederzeit per `skip` abbrechbar. Datengetrieben (`tutorial.yaml`,
+> `TutorialLoader`), als `TutorialGuide` in den Game-Loop eingehängt; nur bei Neuem
+> Spiel, nicht beim Laden.
+
 | Entscheidung | Wert |
 |---|---|
 | Eigene `uebung`-Datenstrukturen verwenden? | **Nein** – Standard-Collections (vom Prof bestätigt) |

Semesterprojekt/docs/music.md

@@ -0,0 +1,17 @@
+# Background music (GUI)
+
+Background music plays only in the Swing GUI. It is **data-driven and external**:
+
+- Put `.ogg` (OGG Vorbis) files in a `music/` folder next to where you run the game.
+  This folder is git-ignored and never bundled in the JAR.
+- A room plays a track via an optional `music:` field in `rooms.yaml`, e.g.
+  `music: manor-theme.ogg`. Entering a room with a different track fades the old one
+  out and the new one in (sequential, not an overlapping cross-fade);
+  a room with no `music:` field fades to silence; the same track keeps playing
+  seamlessly across rooms.
+- Volume is the **Music** setting (Off / Low / Medium / High) in the Settings menu,
+  persisted to `saves/settings.json`. Off disables playback.
+- Missing files are ignored (silent) — the game never crashes over absent audio.
+- The console version is always silent.
+
+Decoding uses the `vorbisspi` + `jorbis` libraries via the `javax.sound` SPI.

Semesterprojekt/docs/superpowers/plans/2026-05-31-endings.md

@@ -0,0 +1,458 @@
+# Win-Condition & Endings Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Priority-ordered, condition-driven endings with an end-of-game summary; the game ends when an ending fires.
+
+**Architecture:** `Ending` is data (condition + text), loaded from optional `endings.yaml` into an ordered `World.endings`. `EndingEngine.triggered(ctx)` returns the first matching ending; `Game` checks it each turn after the quest tick, prints the ending + summary, and stops. Reuses the existing condition engine and quest log.
+
+**Tech Stack:** Java 25, Maven, JUnit 5 + AssertJ, Lombok, Jackson/SnakeYAML.
+
+Spec: [docs/superpowers/specs/2026-05-31-endings-design.md](../specs/2026-05-31-endings-design.md)
+
+---
+
+## Task 1: Ending model, DTO/factory, World.endings, loading
+
+**Files:**
+- Create: `model/Ending.java`, `loader/dto/EndingDto.java`, `loader/EndingFactory.java`
+- Modify: `model/World.java`, `loader/WorldLoader.java`
+- Test: `loader/EndingLoadingTest.java`
+
+- [ ] **Step 1: Create `model/Ending.java`**
+
+```java
+package thb.jeanluc.adventure.model;
+
+import java.util.List;
+
+/** A game ending: shown (and ends the game) when its conditions hold. */
+public record Ending(String id, String title, boolean victory, List<Condition> when, String text) {
+    public Ending {
+        when = when == null ? List.of() : List.copyOf(when);
+    }
+}
+```
+
+- [ ] **Step 2: Add `endings` to `World.java` with back-compat constructors**
+
+Add import:
+```java
+import java.util.List;
+```
+Add the field after `quests`:
+```java
+    /** Ordered list of endings (first matching one wins). */
+    private final List<Ending> endings;
+```
+Replace the existing back-compat constructor with two that both delegate to the full constructor:
+```java
+    /** Backward-compatible constructor for worlds without quests or endings. */
+    public World(Map<String, Room> rooms, Map<String, Item> items, Map<String, Npc> npcs,
+                 String title, String welcomeMessage) {
+        this(rooms, items, npcs, title, welcomeMessage, Map.of(), List.of());
+    }
+
+    /** Backward-compatible constructor for worlds with quests but no endings. */
+    public World(Map<String, Room> rooms, Map<String, Item> items, Map<String, Npc> npcs,
+                 String title, String welcomeMessage, Map<String, Quest> quests) {
+        this(rooms, items, npcs, title, welcomeMessage, quests, List.of());
+    }
+```
+(The 7-arg constructor is the Lombok-generated `@RequiredArgsConstructor` over all final fields in declaration order: rooms, items, npcs, title, welcomeMessage, quests, endings.)
+
+- [ ] **Step 3: Create `loader/dto/EndingDto.java`**
+
+```java
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a game ending. */
+public record EndingDto(String id, String title, Boolean victory, List<ConditionDto> when, String text) {
+}
+```
+
+- [ ] **Step 4: Create `loader/EndingFactory.java`**
+
+```java
+package thb.jeanluc.adventure.loader;
+
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EndingDto;
+import thb.jeanluc.adventure.model.Ending;
+
+/** Builds {@link Ending} objects from {@link EndingDto}s. */
+public final class EndingFactory {
+
+    private EndingFactory() {
+    }
+
+    public static Ending fromDto(EndingDto dto) {
+        return new Ending(
+                dto.id(),
+                dto.title(),
+                Boolean.TRUE.equals(dto.victory()),
+                ConditionDto.toModelList(dto.when()),
+                dto.text());
+    }
+}
+```
+
+- [ ] **Step 5: Load `endings.yaml` in `WorldLoader.java`**
+
+Add imports:
+```java
+import thb.jeanluc.adventure.loader.dto.EndingDto;
+import thb.jeanluc.adventure.model.Ending;
+```
+After the `questDtos` read, add:
+```java
+        List<EndingDto> endingDtos = readListOptional(basePath + "/endings.yaml", EndingDto.class);
+```
+After the quest `requireUniqueIds`, add:
+```java
+        requireUniqueIds("ending", endingDtos.stream().map(EndingDto::id).toList());
+```
+Build an **ordered** ending list (preserve YAML order) next to the quest map build:
+```java
+        List<Ending> endings = new ArrayList<>();
+        for (EndingDto dto : endingDtos) {
+            endings.add(EndingFactory.fromDto(dto));
+        }
+```
+Add the import for `ArrayList` if missing:
+```java
+import java.util.ArrayList;
+```
+Change the `World` construction to the 7-arg form:
+```java
+        World world = new World(rooms, items, npcs,
+                gameDto.title(), gameDto.welcomeMessage(), quests, endings);
+```
+
+- [ ] **Step 6: Write the loading test**
+
+`src/test/java/thb/jeanluc/adventure/loader/EndingLoadingTest.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EndingDto;
+import thb.jeanluc.adventure.model.Ending;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class EndingLoadingTest {
+    @Test
+    void factoryMapsFields() {
+        Ending e = EndingFactory.fromDto(new EndingDto("victory", "Won", true,
+                List.of(new ConditionDto("manor_secured", null, null)), "You win."));
+        assertThat(e.id()).isEqualTo("victory");
+        assertThat(e.victory()).isTrue();
+        assertThat(e.when()).hasSize(1);
+        assertThat(e.text()).isEqualTo("You win.");
+    }
+}
+```
+
+- [ ] **Step 7: Run tests**
+
+Run: `mvn -q test -Dtest=EndingLoadingTest`
+Expected: PASS.
+Run: `mvn -q test`
+Expected: PASS — the real `endings.yaml` does not exist yet, so `readListOptional` returns empty; existing `new World(...)` callers compile via the back-compat constructors.
+
+- [ ] **Step 8: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/model/Ending.java \
+        src/main/java/thb/jeanluc/adventure/loader/dto/EndingDto.java \
+        src/main/java/thb/jeanluc/adventure/loader/EndingFactory.java \
+        src/main/java/thb/jeanluc/adventure/model/World.java \
+        src/main/java/thb/jeanluc/adventure/loader/WorldLoader.java \
+        src/test/java/thb/jeanluc/adventure/loader/EndingLoadingTest.java
+git commit -m "feat: Ending model + endings.yaml loading (ordered, optional)"
+```
+
+---
+
+## Task 2: EndingEngine + Game wiring
+
+**Files:**
+- Create: `game/EndingEngine.java`
+- Modify: `game/Game.java`
+- Test: `game/EndingEngineTest.java`
+
+- [ ] **Step 1: Write failing test**
+
+`src/test/java/thb/jeanluc/adventure/game/EndingEngineTest.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Condition;
+import thb.jeanluc.adventure.model.Ending;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.World;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class EndingEngineTest {
+    private GameContext ctx(List<Ending> endings) {
+        Player p = new Player(new Room("k", "K", "d"), 0);
+        World w = new World(Map.of(), Map.of(), Map.of(), "t", "w", Map.of(), endings);
+        return new GameContext(w, p, new TestIO());
+    }
+
+    private Ending ending(String id, boolean victory, String flag) {
+        return new Ending(id, id + "-title", victory,
+                List.of(new Condition(Condition.Type.FLAG, flag)), id + " text");
+    }
+
+    @Test
+    void firstMatchingEndingWinsByOrder() {
+        GameContext ctx = ctx(List.of(ending("victory", true, "won"), ending("fled", false, "fled")));
+        ctx.getState().set("won");
+        ctx.getState().set("fled");
+        assertThat(EndingEngine.triggered(ctx).id()).isEqualTo("victory");
+    }
+
+    @Test
+    void noEndingWhenNoConditionHolds() {
+        GameContext ctx = ctx(List.of(ending("victory", true, "won")));
+        assertThat(EndingEngine.triggered(ctx)).isNull();
+    }
+
+    @Test
+    void renderIncludesTitleTextAndSummary() {
+        GameContext ctx = ctx(List.of(ending("victory", true, "won")));
+        ctx.getState().set("won");
+        String out = EndingEngine.render(EndingEngine.triggered(ctx), ctx, 7).plainText();
+        assertThat(out).contains("victory-title").contains("victory text");
+        assertThat(out).contains("Turns: 7").contains("Quests completed: 0 / 0");
+    }
+}
+```
+
+- [ ] **Step 2: Run to verify failure**
+
+Run: `mvn -q test -Dtest=EndingEngineTest`
+Expected: FAIL — `EndingEngine` missing.
+
+- [ ] **Step 3: Create `game/EndingEngine.java`**
+
+```java
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.io.text.StyledText;
+import thb.jeanluc.adventure.model.Ending;
+
+/** Detects the first matching ending and renders the end-of-game screen. */
+public final class EndingEngine {
+
+    private EndingEngine() {
+    }
+
+    /** First ending whose conditions hold, in list order; null if none. */
+    public static Ending triggered(GameContext ctx) {
+        for (Ending e : ctx.getWorld().getEndings()) {
+            if (Conditions.all(e.when(), ctx)) {
+                return e;
+            }
+        }
+        return null;
+    }
+
+    /** Builds the ending screen: title banner, text, and a run summary. */
+    public static StyledText render(Ending e, GameContext ctx, int turns) {
+        int total = ctx.getWorld().getQuests().size();
+        int done = ctx.getQuestLog().completed().size();
+        String bar = "═".repeat(Math.max(12, e.title().length() + 6));
+
+        StyledText.Builder b = StyledText.builder();
+        b.heading(bar + "\n").heading("  " + e.title() + "\n").heading(bar + "\n");
+        b.plain(e.text().stripTrailing()).plain("\n\n");
+        b.dim("Turns: " + turns + "\n");
+        b.dim("Quests completed: " + done + " / " + total + "\n");
+        b.heading("Rank: " + rank(e, total, done));
+        return b.build();
+    }
+
+    private static String rank(Ending e, int total, int done) {
+        if (e.victory() && total > 0 && done == total) {
+            return "Master of the Manor";
+        }
+        if (e.victory()) {
+            return "Manor Reclaimed";
+        }
+        return "Escaped — the manor keeps its secrets";
+    }
+}
+```
+
+- [ ] **Step 4: Wire endings into `Game.java`**
+
+In `Game.java` add a `maybeEnd()` method and call it after each `publishHud()`. Add the import:
+```java
+import thb.jeanluc.adventure.model.Ending;
+```
+(`EndingEngine` is in the same `game` package — no import.) Update `run()` so it calls `maybeEnd()` after the initial publish and after the per-iteration publish:
+```java
+    public void run() {
+        publishHud();
+        maybeEnd();
+        while (running) {
+            String input = ctx.getIo().readLine();
+            if (input == null) {
+                break;
+            }
+            ParsedCommand parsed = parser.parse(input);
+            if (parsed.verb().isEmpty()) {
+                continue;
+            }
+            Optional<Command> cmd = registry.find(parsed.verb());
+            if (cmd.isEmpty()) {
+                ctx.getIo().write("I don't understand '" + parsed.verb() + "'. Type 'help'.");
+            } else {
+                cmd.get().execute(ctx, parsed.args());
+                turn++;
+            }
+            publishHud();
+            maybeEnd();
+        }
+    }
+
+    private void maybeEnd() {
+        Ending e = EndingEngine.triggered(ctx);
+        if (e != null) {
+            ctx.getIo().print(EndingEngine.render(e, ctx, turn));
+            stop();
+        }
+    }
+```
+
+- [ ] **Step 5: Run tests**
+
+Run: `mvn -q test -Dtest=EndingEngineTest`
+Expected: PASS.
+Run: `mvn -q test`
+Expected: PASS — `GameTest`'s worlds have no endings (empty list), so `maybeEnd()` is a no-op there.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/game/EndingEngine.java \
+        src/main/java/thb/jeanluc/adventure/game/Game.java \
+        src/test/java/thb/jeanluc/adventure/game/EndingEngineTest.java
+git commit -m "feat(game): EndingEngine + per-turn end check with summary"
+```
+
+---
+
+## Task 3: Demo endings + flee door + docs + verification
+
+**Files:**
+- Create: `src/main/resources/world/endings.yaml`
+- Modify: `src/main/resources/world/items.yaml`, `rooms.yaml`, `docs/enhancement-ideas.md`
+
+- [ ] **Step 1: Create `src/main/resources/world/endings.yaml`**
+
+```yaml
+- id: victory
+  title: "The Manor Reclaimed"
+  victory: true
+  when: [{ flag: manor_secured }]
+  text: |
+    The lights hold steady and the whispers fade to nothing. Whatever held
+    this place has loosened its grip. The manor is yours now.
+- id: fled
+  title: "Into the Night"
+  victory: false
+  when: [{ flag: fled }]
+  text: |
+    You wrench the front door open and bolt into the dark. Safe — but the
+    manor keeps its secrets, and they will keep you awake for years.
+```
+
+- [ ] **Step 2: Add a "front door" switch to `items.yaml`**
+
+Append:
+```yaml
+- id: front_door
+  type: switchable
+  name: Front Door
+  description: The heavy front door. It would let you leave the manor for good.
+  state: false
+  onText: |
+    You haul the front door open and step out into the cold night.
+  offText: |
+    You ease the door shut again.
+  effects:
+    - { setFlag: fled }
+```
+
+- [ ] **Step 3: Place the door in the kitchen (`rooms.yaml`)**
+
+Change the kitchen's items line from:
+```yaml
+  items: [letter, lamp]
+```
+to:
+```yaml
+  items: [letter, lamp, front_door]
+```
+
+- [ ] **Step 4: Mark 3.3 done in `docs/enhancement-ideas.md`**
+
+Under the `### 5. Quest-System (NPC-Ausbau)` status block, append:
+```markdown
+> ✅ #3.3 umgesetzt (Branch `feature/endings`): priorisierte, condition-driven
+> Enden (`endings.yaml`) + End-Screen mit Summary (Züge, Quests X/Y, Rang).
+> Demo: Sieg-Ende (`manor_secured`) und Flucht-Ende (Front Door → `fled`).
+> Damit ist das Quest-System (#3) komplett.
+```
+
+- [ ] **Step 5: Full suite + end-to-end console**
+
+Run: `mvn -q test`
+Expected: PASS.
+
+Victory path:
+```bash
+printf 'go south\nuse generator\ngo north\ntake lamp\ngive lamp old_man\n' | mvn -q -DskipTests exec:java@run
+```
+Expected: completing the `restore_power` quest sets `manor_secured`; on the next turn the game prints the **"The Manor Reclaimed"** ending banner, the summary (`Turns: …`, `Quests completed: 1 / 1`, `Rank: Master of the Manor`), and exits — no `quit` needed.
+
+Flee path:
+```bash
+printf 'use front_door\n' | mvn -q -DskipTests exec:java@run
+```
+Expected: the **"Into the Night"** ending + summary (`Rank: Escaped …`), then exit.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/main/resources/world/endings.yaml \
+        src/main/resources/world/items.yaml \
+        src/main/resources/world/rooms.yaml \
+        docs/enhancement-ideas.md
+git commit -m "feat(content): victory & flee endings; front-door flee switch"
+```
+
+---
+
+## Self-Review notes
+
+- **Spec coverage:** model+loader (T1), engine+Game wiring+summary (T2), demo+docs (T3). Scoreboards/turn-conditions deferred.
+- **Backward compatibility:** `World` gains 5- and 6-arg back-compat constructors delegating to the 7-arg; existing `new World(...)` callers (tests, prior loader pattern) compile unchanged. `endings.yaml` optional. `GameTest` worlds have empty endings → `maybeEnd()` no-op.
+- **Type consistency:** `EndingEngine.triggered(ctx)`/`render(Ending, ctx, int)`, `Ending.when/victory/title/text`, `World.getEndings`, `EndingFactory.fromDto`, `EndingDto` used consistently.
+- **Layering:** `Ending` (model) carries no `game` dependency; `EndingEngine` (game) depends on model + io.text.

Semesterprojekt/docs/superpowers/plans/2026-05-31-light-darkness.md

@@ -0,0 +1,485 @@
+# Light & Darkness Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Dark rooms you can't enter, see, or interact with unless you carry a lit light source (the lamp).
+
+**Architecture:** A `Room.dark` flag and an `Item.light` flag, plus one `Light` helper (`isLit`/`carryingLight`). Four commands gate on it (`go` entry, `look`, `take`, `examine`); the HUD's `light` field is wired to it. Reuses the switchable lamp and is fully backward-compatible (optional flags).
+
+**Tech Stack:** Java 25, Maven, JUnit 5 + AssertJ, Lombok.
+
+Spec: [docs/superpowers/specs/2026-05-31-light-darkness-design.md](../specs/2026-05-31-light-darkness-design.md)
+
+---
+
+## Task 1: Data flags + `Light` helper
+
+**Files:**
+- Modify: `model/item/Item.java`, `loader/dto/ItemDto.java`, `loader/ItemFactory.java`, `model/Room.java`, `loader/dto/RoomDto.java`, `loader/RoomFactory.java`
+- Create: `game/Light.java`
+- Test: `game/LightTest.java`
+
+- [ ] **Step 1: Write failing test**
+
+`src/test/java/thb/jeanluc/adventure/game/LightTest.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.item.PlainItem;
+import thb.jeanluc.adventure.model.item.SwitchableItem;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class LightTest {
+    private GameContext ctx(Player p) {
+        return new GameContext(null, p, new TestIO());
+    }
+
+    private SwitchableItem lamp(boolean on) {
+        return SwitchableItem.builder().id("lamp").name("Lamp").description("d")
+                .state(on).onText("on").offText("off").light(true).build();
+    }
+
+    @Test
+    void litRoomIsAlwaysLit() {
+        Room bright = new Room("r", "R", "d"); // dark defaults to false
+        assertThat(Light.isLit(ctx(new Player(bright, 0)), bright)).isTrue();
+    }
+
+    @Test
+    void darkRoomNeedsActiveLight() {
+        Room dark = new Room("r", "R", "d");
+        dark.setDark(true);
+        Player p = new Player(dark, 0);
+        GameContext ctx = ctx(p);
+        assertThat(Light.isLit(ctx, dark)).isFalse();
+
+        p.addItem(lamp(false));
+        assertThat(Light.isLit(ctx, dark)).isFalse();   // lamp off
+
+        p.removeItem("lamp");
+        p.addItem(lamp(true));
+        assertThat(Light.isLit(ctx, dark)).isTrue();    // lamp on, carried
+        assertThat(Light.carryingLight(ctx)).isTrue();
+    }
+
+    @Test
+    void litLampLyingInRoomLightsIt() {
+        Room dark = new Room("r", "R", "d");
+        dark.setDark(true);
+        dark.addItem(lamp(true));
+        Player p = new Player(dark, 0);
+        assertThat(Light.isLit(ctx(p), dark)).isTrue();
+        assertThat(Light.carryingLight(ctx(p))).isFalse(); // not carried
+    }
+
+    @Test
+    void nonLightItemDoesNotLight() {
+        Room dark = new Room("r", "R", "d");
+        dark.setDark(true);
+        Player p = new Player(dark, 0);
+        p.addItem(PlainItem.builder().id("rock").name("Rock").description("d").build());
+        assertThat(Light.isLit(ctx(p), dark)).isFalse();
+    }
+}
+```
+
+- [ ] **Step 2: Run to verify failure**
+
+Run: `mvn -q test -Dtest=LightTest`
+Expected: FAIL — `Item.light` / `Room.setDark` / `Light` missing.
+
+- [ ] **Step 3: Add `light` to `Item.java`**
+
+Add the field after `description`:
+```java
+    /** Whether this item can serve as a light source (when on, for switchables). */
+    protected final boolean light;
+```
+(`@SuperBuilder` exposes `.light(...)` on every subclass builder; `@Getter` generates `isLight()`. Unset builders default to `false`.)
+
+- [ ] **Step 4: Add `light` to `ItemDto.java` and wire `ItemFactory.java`**
+
+In `ItemDto.java` append a component (after `effects`) and update the back-compat constructor:
+```java
+        List<EffectDto> effects,
+        Boolean light
+```
+```java
+    /** Backward-compatible constructor without effects/light. */
+    public ItemDto(String type, String id, String name, String description,
+                   String readText, Boolean initialState, String onText, String offText) {
+        this(type, id, name, description, readText, initialState, onText, offText, null, null);
+    }
+```
+In `ItemFactory.java`, add `.light(Boolean.TRUE.equals(dto.light()))` to **each** of the three builder cases (plain, readable, switchable), e.g.:
+```java
+            case "plain" -> PlainItem.builder()
+                    .id(dto.id())
+                    .name(dto.name())
+                    .description(dto.description())
+                    .light(Boolean.TRUE.equals(dto.light()))
+                    .build();
+```
+(and the same `.light(...)` line before `.build()` in the `readable` and `switchable` cases.)
+
+- [ ] **Step 5: Add `dark` to `Room.java`**
+
+Add the import if missing:
+```java
+import lombok.Setter;
+```
+Add the field after `descriptionStates`:
+```java
+    /** Whether this room is dark (needs a light source to enter/see). */
+    @Setter
+    private boolean dark;
+```
+(`@Getter` generates `isDark()`; not a constructor arg, so existing `new Room(id,name,desc)` calls are unaffected.)
+
+- [ ] **Step 6: Add `dark` to `RoomDto.java` and wire `RoomFactory.java`**
+
+In `RoomDto.java` append a component (after `descriptionStates`) and update the back-compat constructor:
+```java
+        List<DescriptionStateDto> descriptionStates,
+        Boolean dark
+```
+```java
+    /** Backward-compatible constructor without the optional state fields. */
+    public RoomDto(String id, String name, String description,
+                   Map<String, String> exits, List<String> items, List<String> npcs) {
+        this(id, name, description, exits, items, npcs, null, null, null);
+    }
+```
+In `RoomFactory.java`, set `dark` after building the shell:
+```java
+    public static Room shellFromDto(RoomDto dto) {
+        Room room = new Room(dto.id(), dto.name(), dto.description());
+        room.setDark(Boolean.TRUE.equals(dto.dark()));
+        return room;
+    }
+```
+
+- [ ] **Step 7: Create `game/Light.java`**
+
+```java
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.SwitchableItem;
+
+import java.util.Collection;
+
+/** Decides whether a room is lit, given dark rooms and active light sources. */
+public final class Light {
+
+    private Light() {
+    }
+
+    /** A room is lit if it is not dark, or an active light source is carried or present. */
+    public static boolean isLit(GameContext ctx, Room room) {
+        if (!room.isDark()) {
+            return true;
+        }
+        return hasActiveLight(ctx.getPlayer().getInventory().values())
+                || hasActiveLight(room.getItems().values());
+    }
+
+    /** True if the player carries an active light source (for the HUD). */
+    public static boolean carryingLight(GameContext ctx) {
+        return hasActiveLight(ctx.getPlayer().getInventory().values());
+    }
+
+    private static boolean hasActiveLight(Collection<Item> items) {
+        for (Item it : items) {
+            if (isActiveLight(it)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static boolean isActiveLight(Item it) {
+        if (!it.isLight()) {
+            return false;
+        }
+        return !(it instanceof SwitchableItem s) || s.isOn();
+    }
+}
+```
+
+- [ ] **Step 8: Run tests**
+
+Run: `mvn -q test -Dtest=LightTest`
+Expected: PASS.
+Run: `mvn -q test`
+Expected: PASS — flags default off; existing item/room construction unchanged via back-compat constructors.
+
+- [ ] **Step 9: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/model/item/Item.java \
+        src/main/java/thb/jeanluc/adventure/loader/dto/ItemDto.java \
+        src/main/java/thb/jeanluc/adventure/loader/ItemFactory.java \
+        src/main/java/thb/jeanluc/adventure/model/Room.java \
+        src/main/java/thb/jeanluc/adventure/loader/dto/RoomDto.java \
+        src/main/java/thb/jeanluc/adventure/loader/RoomFactory.java \
+        src/main/java/thb/jeanluc/adventure/game/Light.java \
+        src/test/java/thb/jeanluc/adventure/game/LightTest.java
+git commit -m "feat: Room.dark + Item.light flags and Light helper"
+```
+
+---
+
+## Task 2: Command gating + HUD
+
+**Files:**
+- Modify: `command/impl/GoCommand.java`, `command/impl/LookCommand.java`, `command/impl/TakeCommand.java`, `command/impl/ExamineCommand.java`, `game/Game.java`
+- Test: `command/impl/DarknessTest.java`
+
+- [ ] **Step 1: Write failing test**
+
+`src/test/java/thb/jeanluc/adventure/command/impl/DarknessTest.java`:
+```java
+package thb.jeanluc.adventure.command.impl;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.item.SwitchableItem;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class DarknessTest {
+    private SwitchableItem lamp(boolean on) {
+        return SwitchableItem.builder().id("lamp").name("Lamp").description("d")
+                .state(on).onText("on").offText("off").light(true).build();
+    }
+
+    @Test
+    void cannotEnterDarkRoomWithoutLight() {
+        Room hall = new Room("hall", "Hall", "d");
+        Room cave = new Room("cave", "Cave", "d");
+        cave.setDark(true);
+        hall.addExit(Direction.NORTH, cave);
+        Player p = new Player(hall, 0);
+        GameContext ctx = new GameContext(null, p, new TestIO());
+
+        new GoCommand().execute(ctx, List.of("north"));
+        assertThat(p.getCurrentRoom()).isEqualTo(hall);
+        assertThat(((TestIO) ctx.getIo()).allOutput()).containsIgnoringCase("pitch black");
+    }
+
+    @Test
+    void canEnterDarkRoomWithLitLamp() {
+        Room hall = new Room("hall", "Hall", "d");
+        Room cave = new Room("cave", "Cave", "d");
+        cave.setDark(true);
+        hall.addExit(Direction.NORTH, cave);
+        Player p = new Player(hall, 0);
+        p.addItem(lamp(true));
+        GameContext ctx = new GameContext(null, p, new TestIO());
+
+        new GoCommand().execute(ctx, List.of("north"));
+        assertThat(p.getCurrentRoom()).isEqualTo(cave);
+    }
+
+    @Test
+    void lookAndTakeAreBlockedInTheDark() {
+        Room cave = new Room("cave", "Cave", "d");
+        cave.setDark(true);
+        Player p = new Player(cave, 0);
+        TestIO io = new TestIO();
+        GameContext ctx = new GameContext(null, p, io);
+
+        new LookCommand().execute(ctx, List.of());
+        assertThat(io.allOutput()).containsIgnoringCase("pitch black");
+
+        io.outputs().clear();
+        new TakeCommand().execute(ctx, List.of("anything"));
+        assertThat(io.allOutput()).containsIgnoringCase("too dark");
+    }
+}
+```
+
+- [ ] **Step 2: Run to verify failure**
+
+Run: `mvn -q test -Dtest=DarknessTest`
+Expected: FAIL — no darkness gating yet (entering succeeds, look shows room).
+
+- [ ] **Step 3: Gate `GoCommand`**
+
+Add the import:
+```java
+import thb.jeanluc.adventure.game.Light;
+```
+After the exit-lock check and before `ctx.getPlayer().setCurrentRoom(next.get())`, insert:
+```java
+        if (!Light.isLit(ctx, next.get())) {
+            ctx.getIo().write("It's pitch black beyond the doorway — you need a lit light source "
+                    + "(try lighting your lamp with 'use lamp').");
+            return;
+        }
+```
+
+- [ ] **Step 4: Gate `LookCommand`**
+
+Add the import:
+```java
+import thb.jeanluc.adventure.game.Light;
+```
+At the very start of `execute`, after fetching the room:
+```java
+        Room room = ctx.getPlayer().getCurrentRoom();
+        if (!Light.isLit(ctx, room)) {
+            ctx.getIo().write("It's pitch black; you can't make anything out. You need a light source.");
+            return;
+        }
+```
+(The existing `Room room = ...` line is already there — replace it with this guarded version, keeping the rest below unchanged.)
+
+- [ ] **Step 5: Gate `TakeCommand`**
+
+Add the import:
+```java
+import thb.jeanluc.adventure.game.Light;
+```
+After the `args.isEmpty()` check:
+```java
+        if (!Light.isLit(ctx, ctx.getPlayer().getCurrentRoom())) {
+            ctx.getIo().write("It's too dark to see that.");
+            return;
+        }
+```
+
+- [ ] **Step 6: Gate `ExamineCommand`**
+
+Add the import:
+```java
+import thb.jeanluc.adventure.game.Light;
+```
+After the `args.isEmpty()` check:
+```java
+        if (!Light.isLit(ctx, ctx.getPlayer().getCurrentRoom())) {
+            ctx.getIo().write("It's too dark to see that.");
+            return;
+        }
+```
+
+- [ ] **Step 7: Wire the HUD `light` field in `Game.java`**
+
+Add the import:
+```java
+import thb.jeanluc.adventure.game.Light;   // same package 'game' — drop if redundant
+```
+(`Light` is in package `game`, same as `Game` — no import needed.) In `publishHud()`, change the `Hud` construction's last argument from `false` to `Light.carryingLight(ctx)`:
+```java
+        ctx.getIo().setHud(new Hud(
+                ctx.getPlayer().getCurrentRoom().getName(),
+                ctx.getPlayer().getGold(),
+                turn,
+                Light.carryingLight(ctx)));
+```
+
+- [ ] **Step 8: Run tests**
+
+Run: `mvn -q test -Dtest=DarknessTest`
+Expected: PASS.
+Run: `mvn -q test`
+Expected: PASS (existing command tests use non-dark rooms → `isLit` true → no behaviour change).
+
+- [ ] **Step 9: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/command/impl/GoCommand.java \
+        src/main/java/thb/jeanluc/adventure/command/impl/LookCommand.java \
+        src/main/java/thb/jeanluc/adventure/command/impl/TakeCommand.java \
+        src/main/java/thb/jeanluc/adventure/command/impl/ExamineCommand.java \
+        src/main/java/thb/jeanluc/adventure/game/Game.java \
+        src/test/java/thb/jeanluc/adventure/command/impl/DarknessTest.java
+git commit -m "feat: darkness gating for go/look/take/examine + HUD light"
+```
+
+---
+
+## Task 3: Demo (dark dungeon) + docs + verification
+
+**Files:**
+- Modify: `src/main/resources/world/items.yaml`, `rooms.yaml`, `docs/enhancement-ideas.md`
+
+- [ ] **Step 1: Make the lamp a light source in `items.yaml`**
+
+On the `lamp` item, add `light: true`:
+```yaml
+- type: switchable
+  id: lamp
+  name: Oil Lamp
+  description: An old oil lamp, heavy with fuel.
+  initialState: false
+  light: true
+  onText: The lamp flares to life, casting a warm glow.
+  offText: You snuff out the lamp.
+```
+
+- [ ] **Step 2: Make the dungeon dark in `rooms.yaml`**
+
+On the `dungeon` room, add `dark: true` and tweak the description:
+```yaml
+- id: dungeon
+  name: Dungeon
+  description: |
+    A cramped stone room, black as pitch. A rusty generator squats in the corner.
+  dark: true
+  exits:
+    north: kitchen
+  items: [generator]
+  npcs: []
+```
+
+- [ ] **Step 3: Mark the mechanic done in `docs/enhancement-ideas.md`**
+
+Under the mechanic-spine section (point 3, "Licht & Dunkelheit"), append a status note:
+```markdown
+> ✅ Umgesetzt (Branch `feature/light-darkness`): `Room.dark` + `Item.light`,
+> `Light`-Helper, Gating in go/look/take/examine, HUD-Licht. Demo: dunkler
+> Dungeon braucht die brennende Lampe für den Generator.
+```
+
+- [ ] **Step 4: Full suite + end-to-end console**
+
+Run: `mvn -q test`
+Expected: PASS.
+
+Run:
+```bash
+printf 'go south\ntake lamp\nuse lamp\ngo south\nuse generator\nquit\n' | mvn -q -DskipTests exec:java@run
+```
+Expected: the first `go south` is blocked ("pitch black beyond the doorway"); after `take lamp` and `use lamp` (HUD flips to `light: on`), `go south` enters the dungeon and `use generator` restores the power. No exceptions.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/main/resources/world/items.yaml \
+        src/main/resources/world/rooms.yaml \
+        docs/enhancement-ideas.md
+git commit -m "feat(content): dark dungeon needs the lit lamp"
+```
+
+---
+
+## Self-Review notes
+
+- **Spec coverage:** flags + `Light` (T1), command gating + HUD (T2), demo + docs (T3). Fuel/timed light, cross-room radius deferred.
+- **Backward compatibility:** `Item.light` and `Room.dark` default off; `ItemDto`/`RoomDto` keep back-compat constructors; `Room.dark` is not a constructor arg. Existing tests and YAML unaffected (non-dark rooms are always `isLit`).
+- **Type consistency:** `Light.isLit(ctx, Room)` / `carryingLight(ctx)`, `Item.isLight()`, `Room.isDark()/setDark()`, `ItemDto.light`, `RoomDto.dark` used consistently.
+- **Soft-lock safety:** entry-gate model means dark rooms are entered only with light; lit rooms always re-enterable.

Semesterprojekt/docs/superpowers/plans/2026-06-01-music.md

@@ -0,0 +1,860 @@
+# GUI Background Music Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add per-room background music in the GUI — OGG tracks streamed from an external `music/` folder, fading on room change, with an Off/Low/Med/High Settings control. Console stays silent.
+
+**Architecture:** A testable `MusicController` holds the track/level decision logic (idempotent same-track, null→silence, OFF disables) and delegates raw operations to a `MusicBackend`. `OggMusicBackend` (the only audio/thread code, manually verified) decodes OGG via vorbisspi/jorbis and streams PCM through a `SourceDataLine` with gain fades. `GameIO.setMusic`/`setMusicLevel` are console no-ops; `SwingIO` owns the controller. `Game.publishHud` pushes the current room's track each turn; Settings carries a persisted `MusicLevel`.
+
+**Tech Stack:** Java 25, Maven, vorbisspi+jorbis (OGG), Jackson (YAML), JUnit 5 + AssertJ, Lombok.
+
+---
+
+## File Structure
+
+**Create:** `io/MusicLevel.java`, `io/MusicBackend.java`, `io/MusicController.java`, `io/OggMusicBackend.java`; tests `MusicLevelTest`, `MusicControllerTest`; `docs/music.md`.
+**Modify:** `io/GameIO.java` (seams), `io/SwingIO.java` (wire controller), `io/ConsoleIO.java` (none — inherits no-op), `game/Game.java` (publishHud), `App.java` (setMusic(null) + settings apply), `model/Room.java` + `loader/dto/RoomDto.java` + `loader/RoomFactory.java` (music field), `save/Settings.java` + `save/SettingsStore`-tests + `menu/SettingsMenu.java` + `test/.../menu/MenuTest.java`, `src/main/resources/world/rooms.yaml`, `pom.xml`, `.gitignore`, `docs/enhancement-ideas.md`.
+
+---
+
+## Task 1: `MusicLevel` enum
+
+**Files:** Create `src/main/java/thb/jeanluc/adventure/io/MusicLevel.java`; Test `src/test/java/thb/jeanluc/adventure/io/MusicLevelTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/io/MusicLevelTest.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class MusicLevelTest {
+
+    @Test
+    void gainIncreasesWithLevel() {
+        assertThat(MusicLevel.LOW.gainDb()).isLessThan(MusicLevel.MEDIUM.gainDb());
+        assertThat(MusicLevel.MEDIUM.gainDb()).isLessThan(MusicLevel.HIGH.gainDb());
+    }
+
+    @Test
+    void isOnOnlyWhenNotOff() {
+        assertThat(MusicLevel.OFF.isOn()).isFalse();
+        assertThat(MusicLevel.LOW.isOn()).isTrue();
+        assertThat(MusicLevel.HIGH.isOn()).isTrue();
+    }
+
+    @Test
+    void nextCyclesThroughAllAndWraps() {
+        assertThat(MusicLevel.OFF.next()).isEqualTo(MusicLevel.LOW);
+        assertThat(MusicLevel.LOW.next()).isEqualTo(MusicLevel.MEDIUM);
+        assertThat(MusicLevel.MEDIUM.next()).isEqualTo(MusicLevel.HIGH);
+        assertThat(MusicLevel.HIGH.next()).isEqualTo(MusicLevel.OFF);
+    }
+}
+```
+
+- [ ] **Step 2: Run — expect FAIL** (`mvn -q test -Dtest=MusicLevelTest` → MusicLevel missing).
+
+- [ ] **Step 3: Create `MusicLevel`**
+
+`src/main/java/thb/jeanluc/adventure/io/MusicLevel.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+/** Background-music volume level, cycled in the Settings menu. */
+public enum MusicLevel {
+    OFF, LOW, MEDIUM, HIGH;
+
+    /** Target MASTER_GAIN in decibels. Irrelevant for {@link #OFF} (playback disabled). */
+    public float gainDb() {
+        return switch (this) {
+            case OFF -> Float.NEGATIVE_INFINITY;
+            case LOW -> -20f;
+            case MEDIUM -> -10f;
+            case HIGH -> 0f;
+        };
+    }
+
+    /** @return true when music should play. */
+    public boolean isOn() {
+        return this != OFF;
+    }
+
+    /** Next level in the cycle (wraps HIGH → OFF). */
+    public MusicLevel next() {
+        return values()[(ordinal() + 1) % values().length];
+    }
+}
+```
+
+- [ ] **Step 4: Run — PASS** (`mvn -q test -Dtest=MusicLevelTest`).
+- [ ] **Step 5: Commit** — `git add` the two files; `git commit -m "feat(io): MusicLevel enum (Off/Low/Med/High)"`.
+
+---
+
+## Task 2: `MusicBackend` + `MusicController`
+
+**Files:** Create `io/MusicBackend.java`, `io/MusicController.java`; Test `io/MusicControllerTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/io/MusicControllerTest.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class MusicControllerTest {
+
+    /** Records backend calls for assertions. */
+    private static final class FakeBackend implements MusicBackend {
+        final List<String> calls = new ArrayList<>();
+        public void fadeTo(String track, float gainDb) { calls.add("fadeTo:" + track); }
+        public void fadeOut() { calls.add("fadeOut"); }
+        public void setGainDb(float gainDb) { calls.add("setGain:" + gainDb); }
+        public void shutdown() { calls.add("shutdown"); }
+    }
+
+    @Test
+    void firstRoomWithTrackPlaysAtDefaultLevel() {
+        FakeBackend b = new FakeBackend();
+        new MusicController(b).room("a");
+        assertThat(b.calls).containsExactly("fadeTo:a");
+    }
+
+    @Test
+    void sameTrackDoesNotRestart() {
+        FakeBackend b = new FakeBackend();
+        MusicController c = new MusicController(b);
+        c.room("a");
+        b.calls.clear();
+        c.room("a");
+        assertThat(b.calls).isEmpty();
+    }
+
+    @Test
+    void differentTrackSwitches() {
+        FakeBackend b = new FakeBackend();
+        MusicController c = new MusicController(b);
+        c.room("a");
+        c.room("b");
+        assertThat(b.calls).containsExactly("fadeTo:a", "fadeTo:b");
+    }
+
+    @Test
+    void nullOrBlankRoomFadesToSilence() {
+        FakeBackend b = new FakeBackend();
+        MusicController c = new MusicController(b);
+        c.room("a");
+        c.room(null);
+        c.room("  ");
+        assertThat(b.calls).containsExactly("fadeTo:a", "fadeOut");
+    }
+
+    @Test
+    void offStopsAndIgnoresRooms() {
+        FakeBackend b = new FakeBackend();
+        MusicController c = new MusicController(b);
+        c.room("a");
+        c.level(MusicLevel.OFF);
+        b.calls.clear();
+        c.room("b");
+        assertThat(b.calls).isEmpty();
+    }
+
+    @Test
+    void levelChangeSetsGain() {
+        FakeBackend b = new FakeBackend();
+        MusicController c = new MusicController(b); // default MEDIUM
+        c.level(MusicLevel.HIGH);
+        assertThat(b.calls).containsExactly("setGain:" + MusicLevel.HIGH.gainDb());
+    }
+
+    @Test
+    void turningOffThenOnReplaysOnNextRoom() {
+        FakeBackend b = new FakeBackend();
+        MusicController c = new MusicController(b);
+        c.room("a");
+        c.level(MusicLevel.OFF);   // fadeOut
+        c.level(MusicLevel.MEDIUM); // setGain
+        b.calls.clear();
+        c.room("a");               // current was reset → plays again
+        assertThat(b.calls).containsExactly("fadeTo:a");
+    }
+}
+```
+
+- [ ] **Step 2: Run — expect FAIL.**
+
+- [ ] **Step 3: Create `MusicBackend`**
+
+`src/main/java/thb/jeanluc/adventure/io/MusicBackend.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+/** Raw audio operations — the only part that touches sound hardware. */
+public interface MusicBackend {
+
+    /** Fade the current track out, then start {@code track} (looping) and fade in to {@code gainDb}. */
+    void fadeTo(String track, float gainDb);
+
+    /** Fade the current track out and stop. */
+    void fadeOut();
+
+    /** Set the playback volume immediately. */
+    void setGainDb(float gainDb);
+
+    /** Stop playback and release resources. */
+    void shutdown();
+}
+```
+
+- [ ] **Step 4: Create `MusicController`**
+
+`src/main/java/thb/jeanluc/adventure/io/MusicController.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+import java.util.Objects;
+
+/**
+ * Frontend-agnostic music decision logic. Idempotent per track (never restarts
+ * the same track), fades to silence on a null/blank track, and honours the
+ * {@link MusicLevel} (OFF disables playback). Delegates raw operations to a
+ * {@link MusicBackend}.
+ */
+public final class MusicController {
+
+    private final MusicBackend backend;
+    private MusicLevel level = MusicLevel.MEDIUM;
+    private String current; // currently selected track, or null = silence
+
+    public MusicController(MusicBackend backend) {
+        this.backend = backend;
+    }
+
+    /** Called per turn with the current room's music field (may be null/blank). */
+    public void room(String track) {
+        if (!level.isOn()) {
+            return;
+        }
+        String next = (track == null || track.isBlank()) ? null : track;
+        if (Objects.equals(next, current)) {
+            return;
+        }
+        current = next;
+        if (next == null) {
+            backend.fadeOut();
+        } else {
+            backend.fadeTo(next, level.gainDb());
+        }
+    }
+
+    /** Applies a new music level (volume / off). */
+    public void level(MusicLevel newLevel) {
+        this.level = newLevel;
+        if (!newLevel.isOn()) {
+            backend.fadeOut();
+            current = null; // turning back on replays on the next room() call
+        } else {
+            backend.setGainDb(newLevel.gainDb());
+        }
+    }
+
+    public void shutdown() {
+        backend.shutdown();
+    }
+}
+```
+
+- [ ] **Step 5: Run — PASS** (`mvn -q test -Dtest=MusicControllerTest`, 7 tests).
+- [ ] **Step 6: Commit** — `git commit -m "feat(io): MusicController + MusicBackend (testable music logic)"`.
+
+---
+
+## Task 3: `Room.music` field + loader
+
+**Files:** Modify `model/Room.java`, `loader/dto/RoomDto.java`, `loader/RoomFactory.java`, `src/main/resources/world/rooms.yaml`; Test `loader/RoomMusicTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/loader/RoomMusicTest.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.loader.dto.RoomDto;
+import thb.jeanluc.adventure.model.Room;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class RoomMusicTest {
+
+    @Test
+    void musicFieldIsCarriedOntoRoom() {
+        RoomDto dto = new RoomDto("r", "Room", "d",
+                Map.of(), List.of(), List.of(), null, null, null, "theme.ogg");
+        Room room = RoomFactory.shellFromDto(dto);
+        assertThat(room.getMusic()).isEqualTo("theme.ogg");
+    }
+
+    @Test
+    void absentMusicIsNull() {
+        RoomDto dto = new RoomDto("r", "Room", "d", Map.of(), List.of(), List.of());
+        Room room = RoomFactory.shellFromDto(dto);
+        assertThat(room.getMusic()).isNull();
+    }
+}
+```
+
+- [ ] **Step 2: Run — expect FAIL** (no `getMusic`, RoomDto has no music arg).
+
+- [ ] **Step 3: Add `music` to `Room`**
+
+In `src/main/java/thb/jeanluc/adventure/model/Room.java`, after the `dark` field (which uses `@Setter`), add:
+```java
+    /** Optional GUI background-music track filename for this room; null = none. */
+    @Setter
+    private String music;
+```
+(`@Getter` on the class provides `getMusic()`; `@Setter` provides `setMusic(String)`, mirroring `dark`.)
+
+- [ ] **Step 4: Add `music` to `RoomDto`**
+
+In `src/main/java/thb/jeanluc/adventure/loader/dto/RoomDto.java`, add `String music` as the final record component and update the backward-compatible constructor:
+```java
+public record RoomDto(
+        String id,
+        String name,
+        String description,
+        Map<String, String> exits,
+        List<String> items,
+        List<String> npcs,
+        List<ExitLockDto> exitLocks,
+        List<DescriptionStateDto> descriptionStates,
+        Boolean dark,
+        String music
+) {
+    /** Backward-compatible constructor without the optional state fields. */
+    public RoomDto(String id, String name, String description,
+                   Map<String, String> exits, List<String> items, List<String> npcs) {
+        this(id, name, description, exits, items, npcs, null, null, null, null);
+    }
+}
+```
+
+- [ ] **Step 5: Carry it in `RoomFactory`**
+
+In `src/main/java/thb/jeanluc/adventure/loader/RoomFactory.java`, in `shellFromDto`, after `room.setDark(...)`:
+```java
+        room.setMusic(dto.music());
+```
+
+- [ ] **Step 6: Add demo `music:` fields**
+
+In `src/main/resources/world/rooms.yaml`, add a `music:` line to two rooms (files supplied externally; absent → silent). For the `kitchen` room add `  music: manor-theme.ogg` and for the `dungeon` room add `  music: dungeon-drone.ogg` (place the line among the room's other top-level keys, e.g. after its `description`).
+
+- [ ] **Step 7: Run — PASS** (`mvn -q test -Dtest=RoomMusicTest`), then `mvn -q clean test` (full suite green; WorldLoaderTest uses its own fixture base, unaffected by the production rooms.yaml `music:` additions).
+
+- [ ] **Step 8: Commit** — `git commit -m "feat(loader): per-room music field + demo rooms.yaml entries"`.
+
+---
+
+## Task 4: `GameIO` music seams + game-loop / app wiring
+
+**Files:** Modify `io/GameIO.java`, `game/Game.java`, `App.java`; Test `io/MusicSeamDefaultTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/io/MusicSeamDefaultTest.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class MusicSeamDefaultTest {
+
+    @Test
+    void defaultMusicSeamsAreSilentNoOps() {
+        TestIO io = new TestIO();
+        io.setMusic("anything.ogg");
+        io.setMusic(null);
+        io.setMusicLevel(MusicLevel.HIGH);
+        assertThat(io.outputs()).isEmpty();
+    }
+}
+```
+
+- [ ] **Step 2: Run — expect FAIL** (no `setMusic`/`setMusicLevel`).
+
+- [ ] **Step 3: Add the default seams to `GameIO`**
+
+In `src/main/java/thb/jeanluc/adventure/io/GameIO.java`, add (MusicLevel is in the same package — no import needed):
+```java
+    /** Per-turn current-room music track; null/blank = silence. Console no-op; GUI plays. */
+    default void setMusic(String track) {
+        // no audio in text mode
+    }
+
+    /** Applies the music volume/level. Console no-op; GUI sets it. */
+    default void setMusicLevel(MusicLevel level) {
+        // no audio in text mode
+    }
+```
+
+- [ ] **Step 4: Push the current track each turn in `Game`**
+
+In `src/main/java/thb/jeanluc/adventure/game/Game.java`, at the END of `publishHud()` (after `setQuests(...)`):
+```java
+        ctx.getIo().setMusic(ctx.getPlayer().getCurrentRoom().getMusic());
+```
+
+- [ ] **Step 5: Silence music on return to menu in `App`**
+
+In `src/main/java/thb/jeanluc/adventure/App.java`, in `play(...)`, immediately after `game.run();`:
+```java
+        io.setMusic(null); // fade music out when returning to the menu
+```
+
+- [ ] **Step 6: Run — PASS** (`mvn -q test -Dtest=MusicSeamDefaultTest`), then `mvn -q clean test` (full suite green; console/loop tests unaffected — seams are no-ops).
+
+- [ ] **Step 7: Commit** — `git commit -m "feat(io): GameIO music seams; push room track per turn, silence at menu"`.
+
+---
+
+## Task 5: Settings `MusicLevel` + SettingsMenu refactor to `GameIO`
+
+**Files:** Modify `save/Settings.java`, `menu/SettingsMenu.java`, `App.java`, `test/.../menu/MenuTest.java`, `test/.../save/SettingsStoreTest.java`
+
+- [ ] **Step 1: Write the failing tests**
+
+Add to `src/test/java/thb/jeanluc/adventure/save/SettingsStoreTest.java` (keep existing tests; add imports `thb.jeanluc.adventure.io.MusicLevel`):
+```java
+    @Test
+    void musicLevelRoundTrips(@TempDir Path dir) {
+        SettingsStore store = new SettingsStore(dir.resolve("settings.json"));
+        store.save(new Settings(ConsoleIO.ColorMode.AUTO, ConsoleIO.GlyphMode.UNICODE, MusicLevel.HIGH));
+        assertThat(store.load().musicLevel()).isEqualTo(MusicLevel.HIGH);
+    }
+
+    @Test
+    void oldSettingsWithoutMusicDefaultToMedium(@TempDir Path dir) throws Exception {
+        Path file = dir.resolve("settings.json");
+        Files.writeString(file, "{\"colorMode\":\"ON\",\"glyphMode\":\"ASCII\"}");
+        assertThat(new SettingsStore(file).load().musicLevel()).isEqualTo(MusicLevel.MEDIUM);
+    }
+```
+(Add `import java.nio.file.Files;` / `Path` / `@TempDir` if not already present — the existing tests already use `@TempDir`.)
+
+Update the music-toggle expectation in `src/test/java/thb/jeanluc/adventure/menu/MenuTest.java` — the existing `settingsMenuTogglesGlyphAndPersists` test calls `SettingsMenu.show(io, Settings.defaults(), store, new ConsoleIO())`. Change it to the new signature and account for the new "Music" row (options become Colour=1, Glyphs=2, Music=3, Back=4):
+```java
+    @Test
+    void settingsMenuTogglesGlyphAndPersists(@TempDir Path dir) {
+        SettingsStore store = new SettingsStore(dir.resolve("settings.json"));
+        TestIO io = new TestIO().enqueue("2").enqueue("4"); // toggle Glyphs, then Back
+        Settings result = SettingsMenu.show(io, Settings.defaults(), store);
+        assertThat(result.glyphMode()).isEqualTo(ConsoleIO.GlyphMode.ASCII);
+        assertThat(store.load().glyphMode()).isEqualTo(ConsoleIO.GlyphMode.ASCII);
+    }
+```
+Add a music-cycle test:
+```java
+    @Test
+    void settingsMenuCyclesMusicLevelAndPersists(@TempDir Path dir) {
+        SettingsStore store = new SettingsStore(dir.resolve("settings.json"));
+        TestIO io = new TestIO().enqueue("3").enqueue("4"); // cycle Music once, then Back
+        Settings result = SettingsMenu.show(io, Settings.defaults(), store);
+        assertThat(result.musicLevel()).isEqualTo(MusicLevel.MEDIUM.next()); // HIGH
+        assertThat(store.load().musicLevel()).isEqualTo(MusicLevel.MEDIUM.next());
+    }
+```
+(Add `import thb.jeanluc.adventure.io.MusicLevel;` to MenuTest.)
+
+- [ ] **Step 2: Run — expect FAIL** (Settings has no musicLevel; show signature differs).
+
+- [ ] **Step 3: Extend `Settings`**
+
+Replace `src/main/java/thb/jeanluc/adventure/save/Settings.java`:
+```java
+package thb.jeanluc.adventure.save;
+
+import thb.jeanluc.adventure.io.ConsoleIO;
+import thb.jeanluc.adventure.io.MusicLevel;
+
+/** Persisted user preferences (colour + glyph fidelity + music level). */
+public record Settings(ConsoleIO.ColorMode colorMode, ConsoleIO.GlyphMode glyphMode, MusicLevel musicLevel) {
+
+    public Settings {
+        if (musicLevel == null) {
+            musicLevel = MusicLevel.MEDIUM; // backward-compat: old saves lack this field
+        }
+    }
+
+    /** Backward-compatible constructor for callers that don't set music. */
+    public Settings(ConsoleIO.ColorMode colorMode, ConsoleIO.GlyphMode glyphMode) {
+        this(colorMode, glyphMode, MusicLevel.MEDIUM);
+    }
+
+    public static Settings defaults() {
+        return new Settings(ConsoleIO.ColorMode.AUTO, ConsoleIO.GlyphMode.UNICODE, MusicLevel.MEDIUM);
+    }
+}
+```
+
+- [ ] **Step 4: Refactor `SettingsMenu` to `GameIO` + add the Music row**
+
+Replace `src/main/java/thb/jeanluc/adventure/menu/SettingsMenu.java`:
+```java
+package thb.jeanluc.adventure.menu;
+
+import thb.jeanluc.adventure.io.ConsoleIO;
+import thb.jeanluc.adventure.io.GameIO;
+import thb.jeanluc.adventure.io.MusicLevel;
+import thb.jeanluc.adventure.save.Settings;
+import thb.jeanluc.adventure.save.SettingsStore;
+
+import java.util.List;
+
+/** Settings screen: cycle colour, glyph, and music level; persists + applies. */
+public final class SettingsMenu {
+
+    private SettingsMenu() {
+    }
+
+    /** Loops the settings screen until "Back", persisting + applying each change. */
+    public static Settings show(GameIO io, Settings current, SettingsStore store) {
+        Settings s = current;
+        while (true) {
+            int i = io.choose("SETTINGS", List.of(
+                    "Colour: " + s.colorMode(),
+                    "Glyphs: " + s.glyphMode(),
+                    "Music: " + s.musicLevel(),
+                    "Back"));
+            if (i == 0) {
+                s = new Settings(nextColor(s.colorMode()), s.glyphMode(), s.musicLevel());
+            } else if (i == 1) {
+                s = new Settings(s.colorMode(), nextGlyph(s.glyphMode()), s.musicLevel());
+            } else if (i == 2) {
+                s = new Settings(s.colorMode(), s.glyphMode(), s.musicLevel().next());
+            } else {
+                return s;
+            }
+            store.save(s);
+            apply(s, io);
+        }
+    }
+
+    /** Applies settings to the IO: music level always; colour/glyph only on the console. */
+    public static void apply(Settings s, GameIO io) {
+        io.setMusicLevel(s.musicLevel());
+        if (io instanceof ConsoleIO c) {
+            c.setColorMode(s.colorMode());
+            c.setGlyphMode(s.glyphMode());
+        }
+    }
+
+    private static ConsoleIO.ColorMode nextColor(ConsoleIO.ColorMode m) {
+        return switch (m) {
+            case AUTO -> ConsoleIO.ColorMode.ON;
+            case ON -> ConsoleIO.ColorMode.OFF;
+            case OFF -> ConsoleIO.ColorMode.AUTO;
+        };
+    }
+
+    private static ConsoleIO.GlyphMode nextGlyph(ConsoleIO.GlyphMode m) {
+        return switch (m) {
+            case UNICODE -> ConsoleIO.GlyphMode.ASCII;
+            case ASCII -> ConsoleIO.GlyphMode.GLYPH;
+            case GLYPH -> ConsoleIO.GlyphMode.UNICODE;
+        };
+    }
+}
+```
+
+- [ ] **Step 5: Update `App` call sites**
+
+In `src/main/java/thb/jeanluc/adventure/App.java`, in `run()`:
+- Remove the now-unused `ConsoleIO consoleIo = io instanceof ConsoleIO c ? c : null;` line (if it becomes unused after the changes below).
+- Change the startup apply to `SettingsMenu.apply(settings, io);`.
+- Change the SETTINGS case to `case SETTINGS -> settings = SettingsMenu.show(io, settings, settingsStore);`.
+
+(If `ConsoleIO` import becomes unused in `App.java`, remove it. `io` is the `GameIO`.)
+
+- [ ] **Step 6: Run — PASS** (`mvn -q test -Dtest=SettingsStoreTest,MenuTest,ConsoleIORenderTest`), then `mvn -q clean test` (full suite green).
+
+- [ ] **Step 7: Commit** — `git commit -m "feat(settings): persisted Music level; SettingsMenu applies via GameIO"`.
+
+---
+
+## Task 6: OGG dependency + `OggMusicBackend` + SwingIO wiring
+
+**Files:** Modify `pom.xml`, `io/SwingIO.java`, `.gitignore`; Create `io/OggMusicBackend.java`, `docs/music.md`. (No unit test — audio is manually verified per the no-GUI-test convention.)
+
+- [ ] **Step 1: Add the OGG dependencies to `pom.xml`**
+
+In the `<dependencies>` block:
+```xml
+        <!-- OGG Vorbis decoding (GUI background music) -->
+        <dependency>
+            <groupId>com.googlecode.soundlibs</groupId>
+            <artifactId>vorbisspi</artifactId>
+            <version>1.0.3.3</version>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.soundlibs</groupId>
+            <artifactId>jorbis</artifactId>
+            <version>0.0.17.4</version>
+        </dependency>
+```
+Run `mvn -q -DskipTests compile` to confirm the dependencies resolve.
+
+- [ ] **Step 2: Create `OggMusicBackend`**
+
+`src/main/java/thb/jeanluc/adventure/io/OggMusicBackend.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+import lombok.extern.slf4j.Slf4j;
+
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.FloatControl;
+import javax.sound.sampled.SourceDataLine;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+/**
+ * Streams OGG Vorbis tracks from the external {@code music/} folder through a
+ * {@link SourceDataLine}, looping, with ~400 ms gain fades. Decoding uses the
+ * vorbisspi/jorbis {@code javax.sound} SPI. All playback runs on a daemon
+ * thread; missing/undecodable files are logged and stay silent. GUI-only —
+ * verified manually.
+ */
+@Slf4j
+public final class OggMusicBackend implements MusicBackend {
+
+    private static final String MUSIC_DIR = "music";
+    private static final int FADE_MS = 400;
+    private static final int FADE_STEPS = 20;
+    private static final int BUFFER = 4096;
+    private static final float FLOOR_DB = -40f; // near-silence for fades
+
+    private volatile Thread playThread;
+    private volatile boolean stopping;
+    private volatile SourceDataLine line;
+    private volatile float targetGainDb = MusicLevel.MEDIUM.gainDb();
+
+    @Override
+    public synchronized void fadeTo(String track, float gainDb) {
+        stopCurrent();
+        targetGainDb = gainDb;
+        Path file = Path.of(MUSIC_DIR, track);
+        if (!Files.isReadable(file)) {
+            log.warn("Music file not found, staying silent: {}", file);
+            return;
+        }
+        stopping = false;
+        playThread = new Thread(() -> playLoop(file, gainDb), "music");
+        playThread.setDaemon(true);
+        playThread.start();
+    }
+
+    @Override
+    public synchronized void fadeOut() {
+        stopCurrent();
+    }
+
+    @Override
+    public synchronized void setGainDb(float gainDb) {
+        targetGainDb = gainDb;
+        SourceDataLine l = line;
+        if (l != null) {
+            applyGain(l, gainDb);
+        }
+    }
+
+    @Override
+    public synchronized void shutdown() {
+        stopCurrent();
+    }
+
+    /** Signals the play thread to stop and waits for its fade-out + cleanup. */
+    private void stopCurrent() {
+        Thread t = playThread;
+        if (t == null) {
+            return;
+        }
+        stopping = true;
+        try {
+            t.join(FADE_MS + 600L);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+        playThread = null;
+    }
+
+    private void playLoop(Path file, float gainDb) {
+        SourceDataLine l = null;
+        try {
+            while (!stopping) {
+                try (AudioInputStream in = AudioSystem.getAudioInputStream(file.toFile())) {
+                    AudioFormat base = in.getFormat();
+                    AudioFormat pcm = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
+                            base.getSampleRate(), 16, base.getChannels(),
+                            base.getChannels() * 2, base.getSampleRate(), false);
+                    try (AudioInputStream din = AudioSystem.getAudioInputStream(pcm, in)) {
+                        if (l == null) {
+                            l = AudioSystem.getSourceDataLine(pcm);
+                            l.open(pcm);
+                            l.start();
+                            line = l;
+                            ramp(l, FLOOR_DB, gainDb); // fade in once
+                        }
+                        byte[] buf = new byte[BUFFER];
+                        int n;
+                        while (!stopping && (n = din.read(buf, 0, buf.length)) != -1) {
+                            l.write(buf, 0, n);
+                        }
+                    }
+                }
+            }
+        } catch (Exception e) {
+            log.warn("Music playback failed for {}: {}", file, e.getMessage());
+        } finally {
+            if (l != null) {
+                try {
+                    ramp(l, currentGain(l), FLOOR_DB); // fade out
+                } catch (RuntimeException ignored) {
+                    // best-effort fade
+                }
+                l.stop();
+                l.close();
+            }
+            line = null;
+        }
+    }
+
+    private void ramp(SourceDataLine l, float fromDb, float toDb) {
+        for (int i = 0; i <= FADE_STEPS; i++) {
+            applyGain(l, fromDb + (toDb - fromDb) * i / FADE_STEPS);
+            sleep(FADE_MS / FADE_STEPS);
+        }
+    }
+
+    private float currentGain(SourceDataLine l) {
+        try {
+            return ((FloatControl) l.getControl(FloatControl.Type.MASTER_GAIN)).getValue();
+        } catch (IllegalArgumentException e) {
+            return targetGainDb;
+        }
+    }
+
+    private void applyGain(SourceDataLine l, float db) {
+        try {
+            FloatControl gain = (FloatControl) l.getControl(FloatControl.Type.MASTER_GAIN);
+            gain.setValue(Math.max(gain.getMinimum(), Math.min(gain.getMaximum(), db)));
+        } catch (IllegalArgumentException ignored) {
+            // line has no master-gain control on this platform
+        }
+    }
+
+    private void sleep(long ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+    }
+}
+```
+If any call doesn't compile against the installed vorbisspi/`javax.sound` API, adjust minimally to compile while preserving the behaviour (decode OGG→PCM, stream with looping, MASTER_GAIN fades, graceful on missing file). This class is manually verified.
+
+- [ ] **Step 3: Wire the controller into `SwingIO`**
+
+In `src/main/java/thb/jeanluc/adventure/io/SwingIO.java`:
+- Add a field (with the other final fields): `private final MusicController music = new MusicController(new OggMusicBackend());`
+- Add the overrides (near `setMap`):
+```java
+    @Override
+    public void setMusic(String track) {
+        music.room(track);
+    }
+
+    @Override
+    public void setMusicLevel(MusicLevel level) {
+        music.level(level);
+    }
+```
+(`MusicController`/`MusicLevel`/`OggMusicBackend` are in the same `io` package — no imports needed.)
+
+- [ ] **Step 4: Ignore the music folder**
+
+Append to `.gitignore`:
+```
+# External background-music files (not bundled)
+music/
+```
+
+- [ ] **Step 5: Document the music folder**
+
+Create `docs/music.md`:
+```markdown
+# Background music (GUI)
+
+Background music plays only in the Swing GUI. It is **data-driven and external**:
+
+- Put `.ogg` (OGG Vorbis) files in a `music/` folder next to where you run the game.
+  This folder is git-ignored and never bundled in the JAR.
+- A room plays a track via an optional `music:` field in `rooms.yaml`, e.g.
+  `music: manor-theme.ogg`. Entering a room with a different track cross-fades to it;
+  a room with no `music:` field fades to silence; the same track keeps playing
+  seamlessly across rooms.
+- Volume is the **Music** setting (Off / Low / Medium / High) in the Settings menu,
+  persisted to `saves/settings.json`. Off disables playback.
+- Missing files are ignored (silent) — the game never crashes over absent audio.
+- The console version is always silent.
+
+Decoding uses the `vorbisspi` + `jorbis` libraries via the `javax.sound` SPI.
+```
+
+- [ ] **Step 6: Build + full suite + manual check**
+
+Run: `mvn -q clean test` → BUILD SUCCESS (all prior + new tests; the audio backend has no unit test).
+Manual (optional, needs audio): drop an `.ogg` as `music/manor-theme.ogg`, launch the GUI, New Game → the kitchen should play it; move to the dungeon → it cross-fades to `dungeon-drone.ogg` (or silence if absent); Settings → Music cycles volume/off.
+
+- [ ] **Step 7: Commit** — `git add` pom.xml, OggMusicBackend, SwingIO, .gitignore, docs/music.md; `git commit -m "feat(io): OggMusicBackend + SwingIO wiring; music/ folder + docs"`.
+
+---
+
+## Task 7: Backlog doc
+
+**Files:** Modify `docs/enhancement-ideas.md`
+
+- [ ] **Step 1:** Under section **8. Musik (GUI)**, add a `> ✅ umgesetzt (Branch feature/music)` note mirroring the existing ✅ style: OGG Vorbis (vorbisspi/jorbis), per-room `music:` in rooms.yaml, external gitignored `music/` folder, idempotent track switch with ~400 ms fades, fade-to-silence in unscored rooms, Music level Off/Low/Med/High in Settings (default Medium), console silent; testable `MusicController` over an isolated `OggMusicBackend`.
+
+- [ ] **Step 2: Commit** — `git commit -m "docs: mark GUI background music implemented"`.
+
+---
+
+## Final Verification
+
+- [ ] `mvn -q clean test` — all tests pass (211 prior + MusicLevel/MusicController/RoomMusic/MusicSeam + extended Settings/Menu suites).
+- [ ] OGG dependencies resolve; project compiles.
+- [ ] Manual GUI smoke (optional, with an `.ogg`): room music plays/fades; Settings Music Off silences it; console run is silent.
+- [ ] Load a saved game from before this feature → defaults to Medium, no crash.
+- [ ] `git status` clean (no `music/` tracked).
+```

Semesterprojekt/docs/superpowers/plans/2026-06-01-pathfinding-go-to.md

@@ -0,0 +1,609 @@
+# `go to <room>` Pathfinding Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add `go to <room>` — BFS auto-walk over visited rooms (respecting locked exits + darkness), routed through `GoCommand`, with a silent console summary and an animated GUI minimap.
+
+**Architecture:** A new stateless `Pathfinder` (game package, next to `Conditions`/`Effects`/`Light`) does BFS over visited rooms using the same passability gates `GoCommand` enforces. `GoCommand` gains a branch: a directional arg moves one step (unchanged); a non-direction arg resolves a visited room by id/name and auto-walks the path. Per step it pushes a map frame via a new `GameIO.travelStep(MapView)` hook — a console no-op, overridden by `SwingIO` to repaint + briefly sleep so the minimap animates.
+
+**Tech Stack:** Java 25, Maven, JUnit 5 + AssertJ, Lombok.
+
+---
+
+## File Structure
+
+**Create:**
+- `src/main/java/thb/jeanluc/adventure/game/Pathfinder.java` — BFS over visited rooms.
+
+**Modify:**
+- `io/GameIO.java` — add `travelStep(MapView)` default no-op.
+- `io/SwingIO.java` — override `travelStep` (setMap + ~300ms sleep).
+- `command/impl/GoCommand.java` — extract `moveDirection`; add `goToRoom` (resolve + path + walk + summary).
+- `docs/enhancement-ideas.md` — mark pathfinding implemented.
+
+---
+
+## Task 1: `GameIO.travelStep` hook + `SwingIO` animation
+
+**Files:**
+- Modify: `src/main/java/thb/jeanluc/adventure/io/GameIO.java`
+- Modify: `src/main/java/thb/jeanluc/adventure/io/SwingIO.java`
+- Test: `src/test/java/thb/jeanluc/adventure/io/TravelStepDefaultTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/io/TravelStepDefaultTest.java`:
+```java
+package thb.jeanluc.adventure.io;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.io.text.MapView;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class TravelStepDefaultTest {
+
+    @Test
+    void defaultTravelStepIsSilentNoOp() {
+        TestIO io = new TestIO();
+        // An empty map view is fine; the default must not print or throw.
+        io.travelStep(new MapView(List.of(), List.of()));
+        assertThat(io.outputs()).isEmpty();
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=TravelStepDefaultTest`
+Expected: FAIL — `travelStep` is not defined on `GameIO`.
+
+- [ ] **Step 3: Add the default to `GameIO`**
+
+In `src/main/java/thb/jeanluc/adventure/io/GameIO.java`, add the import (if missing it is already there — `MapView` is used by `setMap`) and the method:
+```java
+    /**
+     * One frame of an auto-walk (the {@code go to} command), as the player moves
+     * through a room en route. Default is a no-op: text mode travels silently.
+     * The GUI overrides this to repaint the map and pace the animation.
+     *
+     * @param view the map snapshot at this step
+     */
+    default void travelStep(MapView view) {
+        // no animation in text mode
+    }
+```
+
+- [ ] **Step 4: Override in `SwingIO`**
+
+In `src/main/java/thb/jeanluc/adventure/io/SwingIO.java`:
+1. Add a constant near the other size constants (e.g. below `SMALL_SIZE`):
+```java
+    /** Delay between rooms while animating a go-to auto-walk, in milliseconds. */
+    private static final long TRAVEL_STEP_MS = 300L;
+```
+2. Add the override (place it near `setMap`):
+```java
+    @Override
+    public void travelStep(MapView view) {
+        setMap(view);
+        try {
+            Thread.sleep(TRAVEL_STEP_MS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+    }
+```
+(`setMap` already calls `map.show(view)` which repaints on the EDT; the sleep on the game-loop worker thread lets each frame render. `MapView` is already imported in `SwingIO`.)
+
+- [ ] **Step 5: Run tests**
+
+Run: `mvn -q test -Dtest=TravelStepDefaultTest`
+Expected: PASS.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/io/GameIO.java \
+        src/main/java/thb/jeanluc/adventure/io/SwingIO.java \
+        src/test/java/thb/jeanluc/adventure/io/TravelStepDefaultTest.java
+git commit -m "feat(io): travelStep hook for animated auto-walk (console no-op, Swing override)"
+```
+
+---
+
+## Task 2: `Pathfinder` BFS
+
+**Files:**
+- Create: `src/main/java/thb/jeanluc/adventure/game/Pathfinder.java`
+- Test: `src/test/java/thb/jeanluc/adventure/game/PathfinderTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/game/PathfinderTest.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Condition;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.World;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.PlainItem;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class PathfinderTest {
+
+    private Room room(String id) {
+        return new Room(id, id, "d");
+    }
+
+    private GameContext ctx(Room start, List<Room> all, Set<String> visited) {
+        Map<String, Room> rooms = new LinkedHashMap<>();
+        for (Room r : all) {
+            rooms.put(r.getId(), r);
+        }
+        World w = new World(rooms, Map.of(), Map.of(), "t", "w");
+        Player p = new Player(start, 0);
+        p.getVisitedRoomIds().addAll(visited);
+        return new GameContext(w, p, new TestIO());
+    }
+
+    @Test
+    void findsShortestPathOverVisitedRooms() {
+        Room a = room("a"), b = room("b"), c = room("c");
+        a.addExit(Direction.NORTH, b);
+        b.addExit(Direction.NORTH, c);
+        GameContext ctx = ctx(a, List.of(a, b, c), Set.of("a", "b", "c"));
+        assertThat(Pathfinder.findPath(ctx, c)).containsExactly(b, c);
+    }
+
+    @Test
+    void willNotRouteThroughUnvisitedRoom() {
+        Room a = room("a"), b = room("b"), c = room("c");
+        a.addExit(Direction.NORTH, b);
+        b.addExit(Direction.NORTH, c);
+        GameContext ctx = ctx(a, List.of(a, b, c), Set.of("a", "c")); // b not visited
+        assertThat(Pathfinder.findPath(ctx, c)).isEmpty();
+    }
+
+    @Test
+    void respectsLockedExit() {
+        Room a = room("a"), b = room("b");
+        a.addExit(Direction.NORTH, b);
+        a.addExitLock(Direction.NORTH,
+                new ExitLock(List.of(new Condition(Condition.Type.FLAG, "open")), "locked"));
+        GameContext ctx = ctx(a, List.of(a, b), Set.of("a", "b"));
+        assertThat(Pathfinder.findPath(ctx, b)).isEmpty();
+        ctx.getState().set("open");
+        assertThat(Pathfinder.findPath(ctx, b)).containsExactly(b);
+    }
+
+    @Test
+    void respectsDarkness() {
+        Room a = room("a");
+        Room dark = room("dark");
+        dark.setDark(true);
+        a.addExit(Direction.NORTH, dark);
+        GameContext ctx = ctx(a, List.of(a, dark), Set.of("a", "dark"));
+        assertThat(Pathfinder.findPath(ctx, dark)).isEmpty();
+        Item torch = PlainItem.builder().id("lit").name("Lit").description("d").light(true).build();
+        ctx.getPlayer().addItem(torch);
+        assertThat(Pathfinder.findPath(ctx, dark)).containsExactly(dark);
+    }
+
+    @Test
+    void unreachableTargetReturnsEmpty() {
+        Room a = room("a");
+        Room island = room("island"); // no connecting exits
+        GameContext ctx = ctx(a, List.of(a, island), Set.of("a", "island"));
+        assertThat(Pathfinder.findPath(ctx, island)).isEmpty();
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=PathfinderTest`
+Expected: FAIL — `Pathfinder` does not exist.
+
+- [ ] **Step 3: Create `Pathfinder`**
+
+`src/main/java/thb/jeanluc/adventure/game/Pathfinder.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
+import thb.jeanluc.adventure.model.Room;
+
+import java.util.ArrayDeque;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Set;
+
+/**
+ * Breadth-first shortest-path search over the rooms the player has already
+ * visited, honouring the same gates as a manual move: locked exits and
+ * darkness. Stateless utility, alongside {@link Conditions}/{@link Effects}/
+ * {@link Light}.
+ */
+public final class Pathfinder {
+
+    private Pathfinder() {
+    }
+
+    /**
+     * Finds the shortest path from the player's current room to {@code target}.
+     *
+     * @param ctx    active game context
+     * @param target destination room (expected to be a visited room)
+     * @return the rooms to step through, excluding the start and ending at
+     *         {@code target}; empty if there is no currently-passable path
+     *         (or {@code target} is the current room)
+     */
+    public static List<Room> findPath(GameContext ctx, Room target) {
+        Room start = ctx.getPlayer().getCurrentRoom();
+        Set<String> visited = ctx.getPlayer().getVisitedRoomIds();
+
+        Queue<Room> queue = new ArrayDeque<>();
+        Map<Room, Room> cameFrom = new HashMap<>();
+        queue.add(start);
+        cameFrom.put(start, null);
+
+        while (!queue.isEmpty()) {
+            Room current = queue.poll();
+            if (current == target) {
+                return reconstruct(cameFrom, target);
+            }
+            for (Map.Entry<Direction, Room> exit : current.getExits().entrySet()) {
+                Room next = exit.getValue();
+                if (cameFrom.containsKey(next) || !visited.contains(next.getId())) {
+                    continue;
+                }
+                ExitLock lock = current.getExitLocks().get(exit.getKey());
+                if (lock != null && !Conditions.all(lock.requires(), ctx)) {
+                    continue;
+                }
+                if (!Light.isLit(ctx, next)) {
+                    continue;
+                }
+                cameFrom.put(next, current);
+                queue.add(next);
+            }
+        }
+        return List.of();
+    }
+
+    /** Walks predecessors back from target to start; returns steps after start. */
+    private static List<Room> reconstruct(Map<Room, Room> cameFrom, Room target) {
+        LinkedList<Room> path = new LinkedList<>();
+        for (Room r = target; r != null && cameFrom.get(r) != null; r = cameFrom.get(r)) {
+            path.addFirst(r);
+        }
+        return path;
+    }
+}
+```
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=PathfinderTest`
+Expected: PASS (5 tests).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/game/Pathfinder.java \
+        src/test/java/thb/jeanluc/adventure/game/PathfinderTest.java
+git commit -m "feat(game): Pathfinder BFS over visited rooms (locks + light aware)"
+```
+
+---
+
+## Task 3: `GoCommand` — route, resolve, walk, summarize
+
+**Files:**
+- Modify: `src/main/java/thb/jeanluc/adventure/command/impl/GoCommand.java`
+- Test: `src/test/java/thb/jeanluc/adventure/command/impl/GoCommandPathTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/command/impl/GoCommandPathTest.java`:
+```java
+package thb.jeanluc.adventure.command.impl;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Condition;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.World;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class GoCommandPathTest {
+
+    /** kitchen --N--> hallway --N--> library (all lit). Optional lock on kitchen->hallway. */
+    private GameContext world(boolean lockHallway, String libraryName) {
+        Room kitchen = new Room("kitchen", "Kitchen", "d");
+        Room hallway = new Room("hallway", "Hallway", "d");
+        Room library = new Room("library", libraryName, "d");
+        kitchen.addExit(Direction.NORTH, hallway);
+        hallway.addExit(Direction.SOUTH, kitchen);
+        hallway.addExit(Direction.NORTH, library);
+        library.addExit(Direction.SOUTH, hallway);
+        if (lockHallway) {
+            kitchen.addExitLock(Direction.NORTH,
+                    new ExitLock(List.of(new Condition(Condition.Type.FLAG, "open")), "It's locked."));
+        }
+        Map<String, Room> rooms = new LinkedHashMap<>();
+        rooms.put("kitchen", kitchen);
+        rooms.put("hallway", hallway);
+        rooms.put("library", library);
+        World w = new World(rooms, Map.of(), Map.of(), "t", "w");
+        Player p = new Player(kitchen, 0);
+        p.getVisitedRoomIds().addAll(List.of("kitchen", "hallway", "library"));
+        return new GameContext(w, p, new TestIO());
+    }
+
+    private String out(GameContext ctx) {
+        return ((TestIO) ctx.getIo()).allOutput();
+    }
+
+    @Test
+    void goToWalksToVisitedRoomById() {
+        GameContext ctx = world(false, "Library");
+        new GoCommand().execute(ctx, List.of("library"));
+        assertThat(ctx.getPlayer().getCurrentRoom().getId()).isEqualTo("library");
+        assertThat(out(ctx)).contains("make your way");
+    }
+
+    @Test
+    void resolvesByRoomName() {
+        // id "library" but type the display name (lower-cased) — still resolves
+        GameContext ctx = world(false, "Grand Library");
+        new GoCommand().execute(ctx, List.of("grand", "library"));
+        assertThat(ctx.getPlayer().getCurrentRoom().getId()).isEqualTo("library");
+    }
+
+    @Test
+    void unknownPlaceReportsSo() {
+        GameContext ctx = world(false, "Library");
+        new GoCommand().execute(ctx, List.of("dungeon"));
+        assertThat(ctx.getPlayer().getCurrentRoom().getId()).isEqualTo("kitchen");
+        assertThat(out(ctx)).contains("don't know any place called 'dungeon'");
+    }
+
+    @Test
+    void alreadyThere() {
+        GameContext ctx = world(false, "Library");
+        new GoCommand().execute(ctx, List.of("kitchen"));
+        assertThat(out(ctx)).contains("already in the Kitchen");
+    }
+
+    @Test
+    void noPassablePathReportsSo() {
+        GameContext ctx = world(true, "Library"); // kitchen->hallway locked, flag unset
+        new GoCommand().execute(ctx, List.of("library"));
+        assertThat(ctx.getPlayer().getCurrentRoom().getId()).isEqualTo("kitchen");
+        assertThat(out(ctx)).contains("can't find a way there");
+    }
+
+    @Test
+    void directionalMoveStillWorks() {
+        GameContext ctx = world(false, "Library");
+        new GoCommand().execute(ctx, List.of("north"));
+        assertThat(ctx.getPlayer().getCurrentRoom().getId()).isEqualTo("hallway");
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=GoCommandPathTest`
+Expected: FAIL — `go to` routing not implemented (e.g. `goToWalksToVisitedRoomById` fails: "library" treated as an unknown direction).
+
+- [ ] **Step 3: Rewrite `GoCommand`**
+
+Replace `src/main/java/thb/jeanluc/adventure/command/impl/GoCommand.java`:
+```java
+package thb.jeanluc.adventure.command.impl;
+
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Conditions;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.Light;
+import thb.jeanluc.adventure.game.Pathfinder;
+import thb.jeanluc.adventure.map.MapLayout;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
+import thb.jeanluc.adventure.model.Room;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Moves the player. {@code go <direction>} steps once to a connected room.
+ * {@code go to <room>} auto-walks the shortest path (BFS) over already-visited
+ * rooms, honouring locked exits and darkness. Usage: {@code go <direction>} or
+ * {@code go to <room>}.
+ */
+public class GoCommand implements Command {
+
+    @Override
+    public void execute(GameContext ctx, List<String> args) {
+        if (args.isEmpty()) {
+            ctx.getIo().write("Go where? Try 'go north' or 'go to <room>'.");
+            return;
+        }
+        try {
+            Direction dir = Direction.fromString(args.getFirst());
+            moveDirection(ctx, dir);
+        } catch (IllegalArgumentException notADirection) {
+            goToRoom(ctx, args);
+        }
+    }
+
+    /** Single-step move in a compass direction (the original behaviour). */
+    private void moveDirection(GameContext ctx, Direction dir) {
+        Room here = ctx.getPlayer().getCurrentRoom();
+        Optional<Room> next = here.getExit(dir);
+        if (next.isEmpty()) {
+            ctx.getIo().write("You can't go " + dir.getLabel() + " from here.");
+            return;
+        }
+        ExitLock lock = here.getExitLocks().get(dir);
+        if (lock != null && !Conditions.all(lock.requires(), ctx)) {
+            ctx.getIo().write(lock.blocked());
+            return;
+        }
+        if (!Light.isLit(ctx, next.get())) {
+            ctx.getIo().write("It's pitch black beyond the doorway — you need a lit light source "
+                    + "(try lighting your lamp with 'use lamp').");
+            return;
+        }
+        ctx.getPlayer().setCurrentRoom(next.get());
+        new LookCommand().execute(ctx, List.of());
+    }
+
+    /** Resolve a visited room by id/name and auto-walk the BFS path to it. */
+    private void goToRoom(GameContext ctx, List<String> args) {
+        String name = String.join(" ", args).toLowerCase();
+        Room target = resolveVisited(ctx, name);
+        if (target == null) {
+            ctx.getIo().write("You don't know any place called '" + name + "'.");
+            return;
+        }
+        Room start = ctx.getPlayer().getCurrentRoom();
+        if (target == start) {
+            ctx.getIo().write("You're already in the " + target.getName() + ".");
+            return;
+        }
+        List<Room> path = Pathfinder.findPath(ctx, target);
+        if (path.isEmpty()) {
+            ctx.getIo().write("You can't find a way there right now.");
+            return;
+        }
+        List<Room> route = new ArrayList<>();
+        route.add(start);
+        route.addAll(path);
+        for (Room step : path) {
+            ctx.getPlayer().setCurrentRoom(step);
+            ctx.getIo().travelStep(MapLayout.compute(
+                    ctx.getWorld(), ctx.getPlayer().getVisitedRoomIds(), step));
+        }
+        ctx.getIo().write(summary(route));
+        new LookCommand().execute(ctx, List.of());
+    }
+
+    /** Finds a visited room whose id or display name matches {@code name}. */
+    private Room resolveVisited(GameContext ctx, String name) {
+        for (String id : ctx.getPlayer().getVisitedRoomIds()) {
+            Room r = ctx.getWorld().getRooms().get(id);
+            if (r == null) {
+                continue;
+            }
+            if (id.equals(name) || r.getName().toLowerCase().equals(name)) {
+                return r;
+            }
+        }
+        return null;
+    }
+
+    /** Names start, destination, and at most one middle waypoint. */
+    private String summary(List<Room> route) {
+        int n = route.size();
+        String start = route.get(0).getName();
+        String dest = route.get(n - 1).getName();
+        if (n >= 3) {
+            String middle = route.get(n / 2).getName();
+            return "You make your way from the " + start + ", through the " + middle
+                    + ", to the " + dest + ".";
+        }
+        return "You make your way from the " + start + " to the " + dest + ".";
+    }
+
+    @Override
+    public String help() {
+        return "go <direction>  -  move one room (north/south/east/west); "
+                + "or  go to <room>  to travel to a known room";
+    }
+}
+```
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=GoCommandPathTest`
+Expected: PASS (6 tests).
+
+- [ ] **Step 5: Full suite (no regressions to existing go/movement tests)**
+
+Run: `mvn -q clean test`
+Expected: BUILD SUCCESS, all green (existing `GameTest`/command tests that use `go north` still pass).
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/command/impl/GoCommand.java \
+        src/test/java/thb/jeanluc/adventure/command/impl/GoCommandPathTest.java
+git commit -m "feat(command): go to <room> auto-walk (BFS path, animated map, summary)"
+```
+
+---
+
+## Task 4: Docs
+
+**Files:**
+- Modify: `docs/enhancement-ideas.md`
+
+- [ ] **Step 1: Mark pathfinding implemented**
+
+In `docs/enhancement-ideas.md`, find the "Festgelegte Erweiterungs-Entscheidungen"
+area where the blockquote notes Pathfinding is *in scope for a later round* (added
+when main-menu/save-load shipped). Update that note to mark it done, in the existing
+`> ✅` style:
+
+> ✅ umgesetzt (Branch `feature/pathfinding-go-to`): `go to <raum>` per BFS über
+> besuchte Räume (Locks + Licht beachtet), via `GoCommand` (Richtung vs. Raumziel).
+> Konsole still + Zusammenfassung (Start/Mitte/Ziel), GUI-Minikarte animiert pro
+> Schritt (`GameIO.travelStep`, ~300 ms). Trie-Autocomplete weiter zurückgestellt.
+
+- [ ] **Step 2: Commit**
+
+```bash
+git add docs/enhancement-ideas.md
+git commit -m "docs: mark go to <room> pathfinding implemented"
+```
+
+---
+
+## Final Verification
+
+- [ ] `mvn -q clean test` — all tests pass (184 prior + new Pathfinder/GoCommand/travelStep suites).
+- [ ] Manual GUI smoke (optional): start a game, walk kitchen→hallway→library manually (so they're visited), return to kitchen, then `go to library` — the minimap dot should step through the hallway to the library (~300ms each), then the library room renders with a summary line.
+- [ ] Manual console smoke (optional): same, confirming silent traversal + the "You make your way ..." line + destination look.
+- [ ] `git status` clean.

Semesterprojekt/docs/superpowers/plans/2026-06-01-tutorial.md

@@ -0,0 +1,822 @@
+# Interactive Start-of-Game Tutorial Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add an interactive, skippable start-of-game walkthrough that makes the player perform the core commands (look→examine→take→inventory→use→go→go-to) in the real starting room, then lists the rest, shown only on New Game.
+
+**Architecture:** A stateful `TutorialGuide` (game package) is layered onto the real `Game` loop (optional; null in normal/loaded play). It prints an instruction, and after each executed command checks — via alias-aware registry lookup, with movement steps requiring an actual room change — whether the step is satisfied (confirm + advance) or not (gentle hint). Steps come from an optional `tutorial.yaml` loaded by a standalone `TutorialLoader` into a `Tutorial`/`TutorialStep` model. `skip` ends it. `App` wires the guide only for New Game.
+
+**Tech Stack:** Java 25, Maven, Jackson (YAML), JUnit 5 + AssertJ, Lombok.
+
+---
+
+## File Structure
+
+**Create:**
+- `model/Tutorial.java`, `model/TutorialStep.java` — domain records.
+- `loader/dto/TutorialDto.java`, `loader/dto/TutorialStepDto.java` — YAML DTOs.
+- `loader/TutorialLoader.java` — reads optional `/world/tutorial.yaml` → `Tutorial`.
+- `game/TutorialGuide.java` — the guide.
+- `src/main/resources/world/tutorial.yaml` — intro + 7 steps + closing tips.
+- `src/test/resources/world/tutorial.yaml` — small 2-step loader fixture.
+
+**Modify:**
+- `game/Game.java` — optional guide field + `setTutorialGuide` + loop hooks.
+- `App.java` — `play(..., withTutorial)`, build guide on New Game.
+- `docs/enhancement-ideas.md` — note the tutorial.
+
+---
+
+## Task 1: Tutorial model, DTO, loader, content
+
+**Files:**
+- Create: `src/main/java/thb/jeanluc/adventure/model/Tutorial.java`
+- Create: `src/main/java/thb/jeanluc/adventure/model/TutorialStep.java`
+- Create: `src/main/java/thb/jeanluc/adventure/loader/dto/TutorialDto.java`
+- Create: `src/main/java/thb/jeanluc/adventure/loader/dto/TutorialStepDto.java`
+- Create: `src/main/java/thb/jeanluc/adventure/loader/TutorialLoader.java`
+- Create: `src/main/resources/world/tutorial.yaml`
+- Create: `src/test/resources/world/tutorial.yaml`
+- Test: `src/test/java/thb/jeanluc/adventure/loader/TutorialLoaderTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/loader/TutorialLoaderTest.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.model.Tutorial;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class TutorialLoaderTest {
+
+    @Test
+    void loadsTheTestFixture() {
+        Tutorial t = new TutorialLoader().load(); // test-classpath /world/tutorial.yaml shadows prod
+        assertThat(t.isEmpty()).isFalse();
+        assertThat(t.intro()).isNotBlank();
+        assertThat(t.closingTips()).isNotBlank();
+        assertThat(t.steps()).hasSize(2);
+        assertThat(t.steps().getFirst().expect()).isEqualTo("look");
+        assertThat(t.steps().getFirst().minArgs()).isZero();
+    }
+
+    @Test
+    void missingFileReturnsEmptyTutorial() {
+        Tutorial t = new TutorialLoader("/no-such-base").load();
+        assertThat(t.isEmpty()).isTrue();
+        assertThat(t.steps()).isEmpty();
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=TutorialLoaderTest`
+Expected: FAIL — `Tutorial`/`TutorialLoader` do not exist.
+
+- [ ] **Step 3: Create the model records**
+
+`src/main/java/thb/jeanluc/adventure/model/TutorialStep.java`:
+```java
+package thb.jeanluc.adventure.model;
+
+/**
+ * One interactive tutorial step: an instruction, the command that satisfies it
+ * ({@code expect} is a verb name like "look", or "go_direction"/"go_to_room"),
+ * a minimum argument count, a success confirmation, and a hint for a valid but
+ * wrong command.
+ */
+public record TutorialStep(
+        String instruction,
+        String expect,
+        int minArgs,
+        String confirm,
+        String hint
+) {
+}
+```
+
+`src/main/java/thb/jeanluc/adventure/model/Tutorial.java`:
+```java
+package thb.jeanluc.adventure.model;
+
+import java.util.List;
+
+/** Onboarding walkthrough: an intro, ordered steps, and closing tips. */
+public record Tutorial(String intro, List<TutorialStep> steps, String closingTips) {
+
+    public Tutorial {
+        steps = steps == null ? List.of() : List.copyOf(steps);
+    }
+
+    public boolean isEmpty() {
+        return steps.isEmpty();
+    }
+
+    /** An absent tutorial (no steps). */
+    public static Tutorial none() {
+        return new Tutorial(null, List.of(), null);
+    }
+}
+```
+
+- [ ] **Step 4: Create the DTOs**
+
+`src/main/java/thb/jeanluc/adventure/loader/dto/TutorialStepDto.java`:
+```java
+package thb.jeanluc.adventure.loader.dto;
+
+/** YAML representation of a tutorial step. */
+public record TutorialStepDto(
+        String instruction,
+        String expect,
+        Integer minArgs,
+        String confirm,
+        String hint
+) {
+}
+```
+
+`src/main/java/thb/jeanluc/adventure/loader/dto/TutorialDto.java`:
+```java
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of the tutorial document. */
+public record TutorialDto(String intro, List<TutorialStepDto> steps, String closingTips) {
+}
+```
+
+- [ ] **Step 5: Create `TutorialLoader`**
+
+`src/main/java/thb/jeanluc/adventure/loader/TutorialLoader.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+import thb.jeanluc.adventure.loader.dto.TutorialDto;
+import thb.jeanluc.adventure.loader.dto.TutorialStepDto;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.model.TutorialStep;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Loads the optional onboarding tutorial from {@code <base>/tutorial.yaml}.
+ * Kept separate from {@link WorldLoader}: the tutorial is onboarding, not world
+ * content. Returns {@link Tutorial#none()} when the file is absent.
+ */
+public class TutorialLoader {
+
+    /** Default classpath base directory. */
+    public static final String DEFAULT_BASE = "/world";
+
+    private final ObjectMapper yaml = new ObjectMapper(new YAMLFactory());
+    private final String basePath;
+
+    public TutorialLoader() {
+        this(DEFAULT_BASE);
+    }
+
+    public TutorialLoader(String basePath) {
+        this.basePath = basePath;
+    }
+
+    /** Reads the tutorial; absent file → {@link Tutorial#none()}. */
+    public Tutorial load() {
+        String resource = basePath + "/tutorial.yaml";
+        try (InputStream in = getClass().getResourceAsStream(resource)) {
+            if (in == null) {
+                return Tutorial.none();
+            }
+            TutorialDto dto = yaml.readValue(in, TutorialDto.class);
+            if (dto == null) {
+                return Tutorial.none();
+            }
+            List<TutorialStep> steps = new ArrayList<>();
+            if (dto.steps() != null) {
+                for (TutorialStepDto s : dto.steps()) {
+                    steps.add(new TutorialStep(
+                            s.instruction(),
+                            s.expect(),
+                            s.minArgs() == null ? 0 : s.minArgs(),
+                            s.confirm(),
+                            s.hint()));
+                }
+            }
+            return new Tutorial(dto.intro(), steps, dto.closingTips());
+        } catch (IOException e) {
+            throw new WorldLoadException("Failed to parse " + resource, e);
+        }
+    }
+}
+```
+
+- [ ] **Step 6: Create the production `tutorial.yaml`**
+
+`src/main/resources/world/tutorial.yaml`:
+```yaml
+intro: |
+  Welcome to the manor. Let me show you the ropes — just type the commands as
+  I describe them. (Type 'skip' at any time to jump straight into the game.)
+steps:
+  - instruction: "First, look around the room: type 'look'."
+    expect: look
+    confirm: "Good — 'look' (or 'l') re-describes wherever you are."
+    hint: "When you're ready, just type: look"
+  - instruction: "Examine something you noticed: 'examine <thing>' (or 'x <thing>')."
+    expect: examine
+    minArgs: 1
+    confirm: "That's how you inspect items, exits, and people up close."
+    hint: "Try examining something, e.g.: examine lamp"
+  - instruction: "Pick something up: 'take <item>'."
+    expect: take
+    minArgs: 1
+    confirm: "Taken. Things you carry go into your inventory."
+    hint: "Pick something up, e.g.: take lamp"
+  - instruction: "Check what you're carrying: 'inventory' (or 'i')."
+    expect: inventory
+    confirm: "That's your inventory."
+    hint: "Type: inventory"
+  - instruction: "Use an item: 'use <item>' — try lighting the lamp."
+    expect: use
+    minArgs: 1
+    confirm: "Some items toggle, read, or react when you use them."
+    hint: "Use something, e.g.: use lamp"
+  - instruction: "Now move to another room: 'go <direction>' (try 'go north')."
+    expect: go_direction
+    confirm: "You can move north / south / east / west between connected rooms."
+    hint: "Head to a connected room, e.g.: go north"
+  - instruction: "Travel back to a room you've already seen: 'go to <room>'."
+    expect: go_to_room
+    confirm: "Nice — 'go to <room>' auto-walks to any room you've already visited."
+    hint: "Try: go to <a room you've already visited>"
+closingTips: |
+  That's the core. A few more you'll want:
+  read · drop · talk to <npc> · give <item> to <npc> ·
+  use <item> on <item> (combine things) · map · quests · save · menu.
+  Type 'help' anytime. Good luck.
+```
+
+- [ ] **Step 7: Create the test fixture `tutorial.yaml`**
+
+`src/test/resources/world/tutorial.yaml` (small, deterministic for the loader test):
+```yaml
+intro: |
+  Test intro.
+steps:
+  - instruction: "Look: type 'look'."
+    expect: look
+    confirm: "Looked."
+    hint: "Type look."
+  - instruction: "Take: type 'take <item>'."
+    expect: take
+    minArgs: 1
+    confirm: "Took it."
+    hint: "Take something."
+closingTips: |
+  Test tips.
+```
+
+- [ ] **Step 8: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=TutorialLoaderTest`
+Expected: PASS (2 tests).
+
+- [ ] **Step 9: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/model/Tutorial.java \
+        src/main/java/thb/jeanluc/adventure/model/TutorialStep.java \
+        src/main/java/thb/jeanluc/adventure/loader/dto/TutorialDto.java \
+        src/main/java/thb/jeanluc/adventure/loader/dto/TutorialStepDto.java \
+        src/main/java/thb/jeanluc/adventure/loader/TutorialLoader.java \
+        src/main/resources/world/tutorial.yaml \
+        src/test/resources/world/tutorial.yaml \
+        src/test/java/thb/jeanluc/adventure/loader/TutorialLoaderTest.java
+git commit -m "feat(tutorial): Tutorial model + TutorialLoader + tutorial.yaml content"
+```
+
+---
+
+## Task 2: `TutorialGuide`
+
+**Files:**
+- Create: `src/main/java/thb/jeanluc/adventure/game/TutorialGuide.java`
+- Test: `src/test/java/thb/jeanluc/adventure/game/TutorialGuideTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/game/TutorialGuideTest.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.command.CommandParser;
+import thb.jeanluc.adventure.command.CommandRegistry;
+import thb.jeanluc.adventure.command.ParsedCommand;
+import thb.jeanluc.adventure.command.impl.ExamineCommand;
+import thb.jeanluc.adventure.command.impl.GoCommand;
+import thb.jeanluc.adventure.command.impl.InventoryCommand;
+import thb.jeanluc.adventure.command.impl.LookCommand;
+import thb.jeanluc.adventure.command.impl.TakeCommand;
+import thb.jeanluc.adventure.command.impl.UseCommand;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.model.TutorialStep;
+import thb.jeanluc.adventure.model.World;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class TutorialGuideTest {
+
+    private CommandRegistry registry() {
+        CommandRegistry r = new CommandRegistry();
+        r.register(new LookCommand(), "look", "l");
+        r.register(new ExamineCommand(), "examine", "x");
+        r.register(new TakeCommand(), "take", "get");
+        r.register(new InventoryCommand(), "inventory", "i");
+        r.register(new UseCommand(), "use");
+        r.register(new GoCommand(), "go", "move", "walk");
+        return r;
+    }
+
+    private final Room kitchen = new Room("kitchen", "Kitchen", "d");
+    private final Room hallway = new Room("hallway", "Hallway", "d");
+
+    private GameContext ctx() {
+        kitchen.addExit(Direction.NORTH, hallway);
+        Map<String, Room> rooms = new LinkedHashMap<>();
+        rooms.put("kitchen", kitchen);
+        rooms.put("hallway", hallway);
+        World w = new World(rooms, Map.of(), Map.of(), "t", "w");
+        Player p = new Player(kitchen, 0);
+        return new GameContext(w, p, new TestIO());
+    }
+
+    private ParsedCommand parse(String s) {
+        return new CommandParser().parse(s);
+    }
+
+    private String out(GameContext ctx) {
+        return ((TestIO) ctx.getIo()).allOutput();
+    }
+
+    private TutorialStep step(String instr, String expect, int minArgs) {
+        return new TutorialStep(instr, expect, minArgs, "OK:" + expect, "HINT:" + expect);
+    }
+
+    @Test
+    void beginPrintsIntroAndFirstInstruction() {
+        GameContext ctx = ctx();
+        Tutorial t = new Tutorial("INTRO", List.of(step("do look", "look", 0)), "TIPS");
+        TutorialGuide g = new TutorialGuide(t, registry());
+        g.begin(ctx);
+        assertThat(out(ctx)).contains("INTRO").contains("do look");
+        assertThat(g.isActive()).isTrue();
+    }
+
+    @Test
+    void aliasSatisfiesVerbStepAndAdvancesToTips() {
+        GameContext ctx = ctx();
+        Tutorial t = new Tutorial("INTRO", List.of(step("do look", "look", 0)), "TIPS");
+        TutorialGuide g = new TutorialGuide(t, registry());
+        g.begin(ctx);
+        g.onCommand(ctx, parse("l")); // alias of look
+        assertThat(out(ctx)).contains("OK:look").contains("TIPS");
+        assertThat(g.isActive()).isFalse();
+    }
+
+    @Test
+    void minArgsGatesTakeStep() {
+        GameContext ctx = ctx();
+        Tutorial t = new Tutorial("I", List.of(step("take it", "take", 1)), "TIPS");
+        TutorialGuide g = new TutorialGuide(t, registry());
+        g.begin(ctx);
+        g.onCommand(ctx, parse("take")); // no arg -> hint, not satisfied
+        assertThat(out(ctx)).contains("HINT:take");
+        assertThat(g.isActive()).isTrue();
+        g.onCommand(ctx, parse("take lamp")); // satisfied
+        assertThat(out(ctx)).contains("OK:take");
+    }
+
+    @Test
+    void goDirectionRequiresAnActualMove() {
+        GameContext ctx = ctx();
+        Tutorial t = new Tutorial("I", List.of(step("move", "go_direction", 0)), "TIPS");
+        TutorialGuide g = new TutorialGuide(t, registry());
+        g.begin(ctx);
+        // typed a direction but did NOT move -> hint
+        g.onCommand(ctx, parse("go north"));
+        assertThat(out(ctx)).contains("HINT:go_direction");
+        assertThat(g.isActive()).isTrue();
+        // now actually move, then the same command satisfies
+        ctx.getPlayer().setCurrentRoom(hallway);
+        g.onCommand(ctx, parse("go north"));
+        assertThat(out(ctx)).contains("OK:go_direction");
+        assertThat(g.isActive()).isFalse();
+    }
+
+    @Test
+    void goToRoomNeedsNonDirectionArgAndMove() {
+        GameContext ctx = ctx();
+        Tutorial t = new Tutorial("I", List.of(step("travel", "go_to_room", 0)), "TIPS");
+        TutorialGuide g = new TutorialGuide(t, registry());
+        g.begin(ctx);
+        ctx.getPlayer().setCurrentRoom(hallway); // moved
+        g.onCommand(ctx, parse("go kitchen")); // "kitchen" is not a direction
+        assertThat(out(ctx)).contains("OK:go_to_room");
+    }
+
+    @Test
+    void skipDeactivates() {
+        GameContext ctx = ctx();
+        Tutorial t = new Tutorial("I", List.of(step("do look", "look", 0)), "TIPS");
+        TutorialGuide g = new TutorialGuide(t, registry());
+        g.begin(ctx);
+        g.skip(ctx);
+        assertThat(out(ctx)).contains("Tutorial skipped");
+        assertThat(g.isActive()).isFalse();
+    }
+
+    @Test
+    void emptyTutorialIsInactive() {
+        TutorialGuide g = new TutorialGuide(Tutorial.none(), registry());
+        assertThat(g.isActive()).isFalse();
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=TutorialGuideTest`
+Expected: FAIL — `TutorialGuide` does not exist.
+
+- [ ] **Step 3: Create `TutorialGuide`**
+
+`src/main/java/thb/jeanluc/adventure/game/TutorialGuide.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.command.CommandRegistry;
+import thb.jeanluc.adventure.command.ParsedCommand;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.model.TutorialStep;
+
+import java.util.Optional;
+
+/**
+ * Drives the interactive start-of-game walkthrough, layered onto the real game
+ * loop. Prints an instruction, then on each executed command decides whether the
+ * current step is satisfied (confirm + advance) or not (hint). Movement steps
+ * require an actual room change. Alias-aware via the {@link CommandRegistry}.
+ */
+public final class TutorialGuide {
+
+    private final Tutorial tutorial;
+    private final CommandRegistry registry;
+    private int index;
+    private boolean active;
+    private Room roomAtStepStart;
+
+    public TutorialGuide(Tutorial tutorial, CommandRegistry registry) {
+        this.tutorial = tutorial;
+        this.registry = registry;
+        this.active = !tutorial.isEmpty();
+    }
+
+    public boolean isActive() {
+        return active;
+    }
+
+    /** Prints the intro and the first instruction (call once at loop start). */
+    public void begin(GameContext ctx) {
+        if (!active) {
+            return;
+        }
+        if (tutorial.intro() != null && !tutorial.intro().isBlank()) {
+            ctx.getIo().write(tutorial.intro());
+        }
+        enterStep(ctx);
+    }
+
+    /** Evaluates the current step against the command that was just executed. */
+    public void onCommand(GameContext ctx, ParsedCommand parsed) {
+        if (!active) {
+            return;
+        }
+        TutorialStep step = tutorial.steps().get(index);
+        if (satisfies(step, ctx, parsed)) {
+            ctx.getIo().write(step.confirm());
+            index++;
+            if (index >= tutorial.steps().size()) {
+                if (tutorial.closingTips() != null && !tutorial.closingTips().isBlank()) {
+                    ctx.getIo().write(tutorial.closingTips());
+                }
+                active = false;
+            } else {
+                enterStep(ctx);
+            }
+        } else {
+            ctx.getIo().write(step.hint());
+        }
+    }
+
+    /** Ends the tutorial early (the 'skip' command). */
+    public void skip(GameContext ctx) {
+        if (active) {
+            ctx.getIo().write("Tutorial skipped.");
+            active = false;
+        }
+    }
+
+    private void enterStep(GameContext ctx) {
+        roomAtStepStart = ctx.getPlayer().getCurrentRoom();
+        ctx.getIo().write(tutorial.steps().get(index).instruction());
+    }
+
+    private boolean satisfies(TutorialStep step, GameContext ctx, ParsedCommand parsed) {
+        String expect = step.expect();
+        if ("go_direction".equals(expect)) {
+            return isGo(parsed) && firstIsDirection(parsed) && moved(ctx);
+        }
+        if ("go_to_room".equals(expect)) {
+            return isGo(parsed) && !firstIsDirection(parsed) && moved(ctx);
+        }
+        return sameCommand(parsed.verb(), expect) && parsed.args().size() >= step.minArgs();
+    }
+
+    private boolean isGo(ParsedCommand p) {
+        return sameCommand(p.verb(), "go") && !p.args().isEmpty();
+    }
+
+    private boolean firstIsDirection(ParsedCommand p) {
+        if (p.args().isEmpty()) {
+            return false;
+        }
+        try {
+            Direction.fromString(p.args().get(0));
+            return true;
+        } catch (IllegalArgumentException e) {
+            return false;
+        }
+    }
+
+    private boolean moved(GameContext ctx) {
+        return ctx.getPlayer().getCurrentRoom() != roomAtStepStart;
+    }
+
+    private boolean sameCommand(String a, String b) {
+        Optional<Command> ca = registry.find(a);
+        Optional<Command> cb = registry.find(b);
+        return ca.isPresent() && cb.isPresent() && ca.get() == cb.get();
+    }
+}
+```
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=TutorialGuideTest`
+Expected: PASS (7 tests).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/game/TutorialGuide.java \
+        src/test/java/thb/jeanluc/adventure/game/TutorialGuideTest.java
+git commit -m "feat(game): TutorialGuide interactive walkthrough engine"
+```
+
+---
+
+## Task 3: Wire the guide into `Game` and `App`
+
+**Files:**
+- Modify: `src/main/java/thb/jeanluc/adventure/game/Game.java`
+- Modify: `src/main/java/thb/jeanluc/adventure/App.java`
+- Test: `src/test/java/thb/jeanluc/adventure/game/GameTutorialTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/game/GameTutorialTest.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.command.CommandParser;
+import thb.jeanluc.adventure.command.CommandRegistry;
+import thb.jeanluc.adventure.command.impl.LookCommand;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.model.TutorialStep;
+import thb.jeanluc.adventure.model.World;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class GameTutorialTest {
+
+    @Test
+    void guideBeginsAndAdvancesThenSkipEndsViaLoop() {
+        Room kitchen = new Room("kitchen", "Kitchen", "d");
+        World w = new World(Map.of("kitchen", kitchen), Map.of(), Map.of(), "t", "w");
+        TestIO io = new TestIO();
+        // scripted player input: a matching 'look', then 'skip'; then EOF (null) ends run()
+        io.enqueue("look").enqueue("skip");
+        GameContext ctx = new GameContext(new GameSession(w, new Player(kitchen, 0), "s"), io);
+
+        CommandRegistry registry = new CommandRegistry();
+        registry.register(new LookCommand(), "look", "l");
+
+        Tutorial t = new Tutorial("INTRO",
+                List.of(new TutorialStep("do look", "look", 0, "STEP1-OK", "hint"),
+                        new TutorialStep("do look again", "look", 0, "STEP2-OK", "hint")),
+                "TIPS");
+        Game game = new Game(ctx, registry, new CommandParser());
+        game.setTutorialGuide(new TutorialGuide(t, registry));
+
+        game.run();
+
+        String out = io.allOutput();
+        assertThat(out).contains("INTRO");      // begin printed
+        assertThat(out).contains("STEP1-OK");   // first 'look' advanced step 1
+        assertThat(out).contains("Tutorial skipped"); // 'skip' ended it before step 2 finished
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=GameTutorialTest`
+Expected: FAIL — `Game.setTutorialGuide` does not exist.
+
+- [ ] **Step 3: Add the guide hooks to `Game`**
+
+In `src/main/java/thb/jeanluc/adventure/game/Game.java`:
+
+1. Add the import:
+```java
+import thb.jeanluc.adventure.game.TutorialGuide;
+```
+(Same package — skip the import; reference `TutorialGuide` directly.)
+
+2. Add a field after `private boolean running = true;`:
+```java
+    /** Optional onboarding guide; null in normal/loaded play. */
+    private TutorialGuide tutorialGuide;
+
+    /** Wires the interactive tutorial (New Game only). */
+    public void setTutorialGuide(TutorialGuide tutorialGuide) {
+        this.tutorialGuide = tutorialGuide;
+    }
+```
+
+3. In `run()`, after the initial `publishHud(); maybeEnd();` and before `while (running) {`:
+```java
+        if (tutorialGuide != null) {
+            tutorialGuide.begin(ctx);
+        }
+```
+
+4. Inside the loop, replace the body from the `parsed.verb().isEmpty()` check through the dispatch with this (adds the skip interception and the post-command hook):
+```java
+            ParsedCommand parsed = parser.parse(input);
+            if (parsed.verb().isEmpty()) {
+                continue;
+            }
+            if (tutorialGuide != null && tutorialGuide.isActive()
+                    && parsed.verb().equals("skip")) {
+                tutorialGuide.skip(ctx);
+                publishHud();
+                continue;
+            }
+            Optional<Command> cmd = registry.find(parsed.verb());
+            if (cmd.isEmpty()) {
+                ctx.getIo().write("I don't understand '" + parsed.verb() + "'. Type 'help'.");
+            } else {
+                cmd.get().execute(ctx, parsed.args());
+                ctx.getSession().incrementTurn();
+                if (ctx.getSession().getTurn() % 10 == 0) {
+                    ctx.save();
+                }
+                if (tutorialGuide != null) {
+                    tutorialGuide.onCommand(ctx, parsed);
+                }
+            }
+            publishHud();
+            maybeEnd();
+```
+
+- [ ] **Step 4: Wire `App`**
+
+In `src/main/java/thb/jeanluc/adventure/App.java`:
+
+1. Add imports:
+```java
+import thb.jeanluc.adventure.game.TutorialGuide;
+import thb.jeanluc.adventure.loader.TutorialLoader;
+import thb.jeanluc.adventure.model.Tutorial;
+```
+
+2. Change the two `play(...)` call sites in `run()`:
+```java
+                case NEW_GAME -> play(io, saves, newSession(io), true);
+```
+and inside the LOAD branch:
+```java
+                            play(io, saves, saves.load(slot.slug()), false);
+```
+
+3. Change the `play` signature and add the guide wiring (after the `HelpCommand` is registered, before the banner):
+```java
+    private static void play(GameIO io, SaveService saves, GameSession session, boolean withTutorial) {
+```
+and, immediately after `registry.register(new HelpCommand(registry), "help", "?");`:
+```java
+        if (withTutorial) {
+            Tutorial tutorial = new TutorialLoader().load();
+            if (!tutorial.isEmpty()) {
+                game.setTutorialGuide(new TutorialGuide(tutorial, registry));
+            }
+        }
+```
+
+- [ ] **Step 5: Run tests + full suite**
+
+Run: `mvn -q test -Dtest=GameTutorialTest`
+Expected: PASS.
+Run: `mvn -q clean test`
+Expected: BUILD SUCCESS, all green (existing GameTest / loop tests unaffected — guide is null there).
+
+- [ ] **Step 6: Manual console smoke (optional)**
+
+Run: `mvn -q -DskipTests compile dependency:build-classpath -Dmdep.outputFile=/tmp/cp.txt >/dev/null 2>&1` then
+`printf '1\nHero\nlook\nskip\nquit\n4\n' | java -cp "target/classes:$(cat /tmp/cp.txt)" thb.jeanluc.adventure.App`
+Expected: New Game → name → room shown → tutorial intro + "look" instruction → after `look`, confirmation + next instruction → `skip` → "Tutorial skipped." → normal play → `quit` → menu → Quit.
+
+- [ ] **Step 7: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/game/Game.java \
+        src/main/java/thb/jeanluc/adventure/App.java \
+        src/test/java/thb/jeanluc/adventure/game/GameTutorialTest.java
+git commit -m "feat: wire TutorialGuide into the game loop; show on New Game only"
+```
+
+---
+
+## Task 4: Docs
+
+**Files:**
+- Modify: `docs/enhancement-ideas.md`
+
+- [ ] **Step 1: Add a tutorial note**
+
+In `docs/enhancement-ideas.md`, under the "Festgelegte Erweiterungs-Entscheidungen"
+area (near the pathfinding ✅ note), add:
+
+> ✅ **Tutorial** umgesetzt (Branch `feature/tutorial`): interaktiver Walkthrough
+> beim Neuen Spiel (look→examine→take→inventory→use→go→go to), verb-/alias-basierte
+> Abschluss-Erkennung (Bewegungs-Schritte verlangen echten Raumwechsel), Abschluss-
+> Tipps, jederzeit per `skip` abbrechbar. Datengetrieben (`tutorial.yaml`,
+> `TutorialLoader`), als `TutorialGuide` in den Game-Loop eingehängt; nur bei Neuem
+> Spiel, nicht beim Laden.
+
+- [ ] **Step 2: Commit**
+
+```bash
+git add docs/enhancement-ideas.md
+git commit -m "docs: note interactive start-of-game tutorial"
+```
+
+---
+
+## Final Verification
+
+- [ ] `mvn -q clean test` — all tests pass (197 prior + TutorialLoader/TutorialGuide/GameTutorial suites).
+- [ ] Manual console smoke (Task 3 Step 6) behaves as described.
+- [ ] Manual: Load a saved game → NO tutorial appears.
+- [ ] `git status` clean.
+```

Semesterprojekt/docs/superpowers/plans/2026-06-01-use-x-on-y.md

@@ -0,0 +1,957 @@
+# `use X on Y` Item Combinations Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add a data-driven `use X on Y` item-combination mechanic: recipes that optionally require conditions, consume items, produce an item, apply effects, and print a response — operands resolved from inventory or the current room.
+
+**Architecture:** A new `Combination` domain record + optional `combinations.yaml` loaded like quests/endings into `World.combinations` (a `Map` keyed by an order-independent pair key). A stateless `Combinations` engine (alongside `Conditions`/`Effects`/`Light`) performs resolution, lookup, and application. `UseCommand` routes 2+ args to the engine; 1 arg keeps the existing single-item behaviour. No parser change — `on`/`with`/`to` are already filler words.
+
+**Tech Stack:** Java 25, Maven, Jackson (YAML loader), JUnit 5 + AssertJ, Lombok.
+
+---
+
+## File Structure
+
+**Create:**
+- `src/main/java/thb/jeanluc/adventure/model/Combination.java` — domain record + canonical pair key.
+- `src/main/java/thb/jeanluc/adventure/loader/dto/CombinationDto.java` — YAML DTO.
+- `src/main/java/thb/jeanluc/adventure/loader/CombinationFactory.java` — DTO → domain, validates item ids exist.
+- `src/main/java/thb/jeanluc/adventure/game/Combinations.java` — combination engine.
+- `src/main/resources/world/combinations.yaml` — demo recipe.
+
+**Modify:**
+- `model/World.java` — add `combinations` field + backward-compatible constructors + getter.
+- `loader/WorldLoader.java` — read `combinations.yaml`, build the map (dup-key check), pass to `World`.
+- `command/impl/UseCommand.java` — route 2+ args to `Combinations.tryUse`.
+- `src/main/resources/world/items.yaml` — add `matches`, `torch`, `lit_torch`.
+- `src/main/resources/world/rooms.yaml` — place `matches` (library) and `torch` (hallway).
+
+---
+
+## Task 1: `Combination` domain model + canonical key
+
+**Files:**
+- Create: `src/main/java/thb/jeanluc/adventure/model/Combination.java`
+- Test: `src/test/java/thb/jeanluc/adventure/model/CombinationTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/model/CombinationTest.java`:
+```java
+package thb.jeanluc.adventure.model;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CombinationTest {
+
+    @Test
+    void keyIsOrderIndependentAndSorted() {
+        assertThat(Combination.key("matches", "torch"))
+                .isEqualTo(Combination.key("torch", "matches"))
+                .isEqualTo("matches|torch");
+        assertThat(Combination.key("b", "a")).isEqualTo("a|b");
+    }
+
+    @Test
+    void nullCollectionComponentsBecomeEmpty() {
+        Combination c = new Combination("a", "b", null, null, null, null, "ok", null);
+        assertThat(c.requires()).isEmpty();
+        assertThat(c.consume()).isEmpty();
+        assertThat(c.effects()).isEmpty();
+        assertThat(c.produce()).isNull();
+        assertThat(c.key()).isEqualTo("a|b");
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=CombinationTest`
+Expected: FAIL — `Combination` does not exist.
+
+- [ ] **Step 3: Create `Combination`**
+
+`src/main/java/thb/jeanluc/adventure/model/Combination.java`:
+```java
+package thb.jeanluc.adventure.model;
+
+import java.util.List;
+
+/**
+ * A data-driven item-combination recipe. Identified by an unordered pair of
+ * item ids ({@code a}, {@code b}). When applied it may require conditions,
+ * consume items, produce an item, apply effects, and print a response.
+ */
+public record Combination(
+        String a,
+        String b,
+        List<Condition> requires,
+        List<String> consume,
+        String produce,
+        List<Effect> effects,
+        String response,
+        String failText
+) {
+    public Combination {
+        requires = requires == null ? List.of() : List.copyOf(requires);
+        consume = consume == null ? List.of() : List.copyOf(consume);
+        effects = effects == null ? List.of() : List.copyOf(effects);
+    }
+
+    /** Order-independent key for an item pair (sorted, '|'-joined). */
+    public static String key(String x, String y) {
+        return x.compareTo(y) <= 0 ? x + "|" + y : y + "|" + x;
+    }
+
+    /** This recipe's canonical pair key. */
+    public String key() {
+        return key(a, b);
+    }
+}
+```
+
+- [ ] **Step 4: Run test to verify it passes**
+
+Run: `mvn -q test -Dtest=CombinationTest`
+Expected: PASS.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/model/Combination.java \
+        src/test/java/thb/jeanluc/adventure/model/CombinationTest.java
+git commit -m "feat(model): Combination recipe record + order-independent key"
+```
+
+---
+
+## Task 2: `World.combinations` field + constructors
+
+**Files:**
+- Modify: `src/main/java/thb/jeanluc/adventure/model/World.java`
+- Test: `src/test/java/thb/jeanluc/adventure/model/WorldCombinationsTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/model/WorldCombinationsTest.java`:
+```java
+package thb.jeanluc.adventure.model;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class WorldCombinationsTest {
+
+    @Test
+    void legacyConstructorsDefaultToEmptyCombinations() {
+        World w5 = new World(Map.of(), Map.of(), Map.of(), "t", "w");
+        World w6 = new World(Map.of(), Map.of(), Map.of(), "t", "w", Map.of());
+        World w7 = new World(Map.of(), Map.of(), Map.of(), "t", "w", Map.of(), List.of());
+        assertThat(w5.getCombinations()).isEmpty();
+        assertThat(w6.getCombinations()).isEmpty();
+        assertThat(w7.getCombinations()).isEmpty();
+    }
+
+    @Test
+    void fullConstructorStoresCombinations() {
+        Combination c = new Combination("a", "b", List.of(), List.of(), null, List.of(), "r", null);
+        World w = new World(Map.of(), Map.of(), Map.of(), "t", "w",
+                Map.of(), List.of(), Map.of(c.key(), c));
+        assertThat(w.getCombinations()).containsKey("a|b");
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=WorldCombinationsTest`
+Expected: FAIL — no `getCombinations()` / no 8-arg constructor.
+
+- [ ] **Step 3: Add the field, constructors, and import**
+
+In `src/main/java/thb/jeanluc/adventure/model/World.java`:
+
+Add the import near the other model imports:
+```java
+import thb.jeanluc.adventure.model.Combination;
+```
+(If the file is in package `thb.jeanluc.adventure.model`, `Combination` is same-package — skip the import; reference it directly.)
+
+Add the field immediately after the `endings` field:
+```java
+    /** Global lookup of combination recipes by canonical pair key. */
+    private final Map<String, Combination> combinations;
+```
+
+Update the existing 5-arg and 6-arg convenience constructors and add a 7-arg one, so all delegate to the Lombok-generated 8-arg constructor:
+```java
+    /** Backward-compatible constructor for worlds without quests, endings, or combinations. */
+    public World(Map<String, Room> rooms, Map<String, Item> items, Map<String, Npc> npcs,
+                 String title, String welcomeMessage) {
+        this(rooms, items, npcs, title, welcomeMessage, Map.of(), List.of(), Map.of());
+    }
+
+    /** Backward-compatible constructor for worlds with quests but no endings/combinations. */
+    public World(Map<String, Room> rooms, Map<String, Item> items, Map<String, Npc> npcs,
+                 String title, String welcomeMessage, Map<String, Quest> quests) {
+        this(rooms, items, npcs, title, welcomeMessage, quests, List.of(), Map.of());
+    }
+
+    /** Backward-compatible constructor for worlds with quests + endings but no combinations. */
+    public World(Map<String, Room> rooms, Map<String, Item> items, Map<String, Npc> npcs,
+                 String title, String welcomeMessage, Map<String, Quest> quests, List<Ending> endings) {
+        this(rooms, items, npcs, title, welcomeMessage, quests, endings, Map.of());
+    }
+```
+(The `@RequiredArgsConstructor` now generates the canonical 8-arg constructor `(rooms, items, npcs, title, welcomeMessage, quests, endings, combinations)`, and `@Getter` provides `getCombinations()`.)
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=WorldCombinationsTest,QuestEngineTest`
+Expected: PASS (QuestEngineTest uses the 6-arg constructor — still compiles).
+
+- [ ] **Step 5: Full compile check (all World callers still build)**
+
+Run: `mvn -q -DskipTests test-compile`
+Expected: BUILD SUCCESS (5/6/7-arg call sites in tests + WorldLoader still resolve).
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/model/World.java \
+        src/test/java/thb/jeanluc/adventure/model/WorldCombinationsTest.java
+git commit -m "feat(model): World.combinations field + backward-compatible constructors"
+```
+
+---
+
+## Task 3: `CombinationDto` + `CombinationFactory` (with id validation)
+
+**Files:**
+- Create: `src/main/java/thb/jeanluc/adventure/loader/dto/CombinationDto.java`
+- Create: `src/main/java/thb/jeanluc/adventure/loader/CombinationFactory.java`
+- Test: `src/test/java/thb/jeanluc/adventure/loader/CombinationFactoryTest.java`
+
+Validation lives in the factory (build-time, with the item map at hand) rather than `WorldValidator`, to avoid changing `WorldValidator`'s constructor (used directly by `WorldValidatorTest`).
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/loader/CombinationFactoryTest.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.loader.dto.CombinationDto;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.PlainItem;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class CombinationFactoryTest {
+
+    private Map<String, Item> items() {
+        Map<String, Item> m = new HashMap<>();
+        for (String id : List.of("matches", "torch", "lit_torch")) {
+            m.put(id, PlainItem.builder().id(id).name(id).description("d").light(false).build());
+        }
+        return m;
+    }
+
+    @Test
+    void buildsCombinationFromDto() {
+        CombinationDto dto = new CombinationDto("matches", "torch", null,
+                List.of("matches", "torch"), "lit_torch", null, "You light it.", null);
+        Combination c = CombinationFactory.fromDto(dto, items());
+        assertThat(c.key()).isEqualTo("matches|torch");
+        assertThat(c.consume()).containsExactly("matches", "torch");
+        assertThat(c.produce()).isEqualTo("lit_torch");
+        assertThat(c.response()).isEqualTo("You light it.");
+    }
+
+    @Test
+    void rejectsUnknownOperandId() {
+        CombinationDto dto = new CombinationDto("matches", "ghost", null, null, null, null, "x", null);
+        assertThatThrownBy(() -> CombinationFactory.fromDto(dto, items()))
+                .isInstanceOf(WorldLoadException.class)
+                .hasMessageContaining("ghost");
+    }
+
+    @Test
+    void rejectsUnknownProduceId() {
+        CombinationDto dto = new CombinationDto("matches", "torch", null, null, "phantom", null, "x", null);
+        assertThatThrownBy(() -> CombinationFactory.fromDto(dto, items()))
+                .isInstanceOf(WorldLoadException.class)
+                .hasMessageContaining("phantom");
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=CombinationFactoryTest`
+Expected: FAIL — `CombinationDto` / `CombinationFactory` do not exist.
+
+- [ ] **Step 3: Create `CombinationDto`**
+
+`src/main/java/thb/jeanluc/adventure/loader/dto/CombinationDto.java`:
+```java
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of an item-combination recipe. */
+public record CombinationDto(
+        String a,
+        String b,
+        List<ConditionDto> requires,
+        List<String> consume,
+        String produce,
+        List<EffectDto> effects,
+        String response,
+        String failText
+) {
+}
+```
+
+- [ ] **Step 4: Create `CombinationFactory`**
+
+`src/main/java/thb/jeanluc/adventure/loader/CombinationFactory.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import thb.jeanluc.adventure.loader.dto.CombinationDto;
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EffectDto;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.item.Item;
+
+import java.util.List;
+import java.util.Map;
+
+/** Builds {@link Combination}s from {@link CombinationDto}s, validating item ids. */
+public final class CombinationFactory {
+
+    private CombinationFactory() {
+    }
+
+    public static Combination fromDto(CombinationDto dto, Map<String, Item> items) {
+        requireItem(items, dto.a(), "a");
+        requireItem(items, dto.b(), "b");
+        if (dto.consume() != null) {
+            for (String id : dto.consume()) {
+                requireItem(items, id, "consume");
+            }
+        }
+        if (dto.produce() != null) {
+            requireItem(items, dto.produce(), "produce");
+        }
+        return new Combination(
+                dto.a(),
+                dto.b(),
+                ConditionDto.toModelList(dto.requires()),
+                dto.consume() == null ? List.of() : List.copyOf(dto.consume()),
+                dto.produce(),
+                EffectDto.toModelList(dto.effects()),
+                dto.response(),
+                dto.failText());
+    }
+
+    private static void requireItem(Map<String, Item> items, String id, String field) {
+        if (id == null) {
+            throw new WorldLoadException("Combination '" + field + "' is missing an item id");
+        }
+        if (!items.containsKey(id)) {
+            throw new WorldLoadException(
+                    "Combination references unknown item '" + id + "' (field '" + field + "')");
+        }
+    }
+}
+```
+
+- [ ] **Step 5: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=CombinationFactoryTest`
+Expected: PASS (3 tests).
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/loader/dto/CombinationDto.java \
+        src/main/java/thb/jeanluc/adventure/loader/CombinationFactory.java \
+        src/test/java/thb/jeanluc/adventure/loader/CombinationFactoryTest.java
+git commit -m "feat(loader): CombinationDto + CombinationFactory with id validation"
+```
+
+---
+
+## Task 4: `Combinations` engine
+
+**Files:**
+- Create: `src/main/java/thb/jeanluc/adventure/game/Combinations.java`
+- Test: `src/test/java/thb/jeanluc/adventure/game/CombinationsTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/game/CombinationsTest.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.Condition;
+import thb.jeanluc.adventure.model.Effect;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.World;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.PlainItem;
+
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CombinationsTest {
+
+    private Item plain(String id, boolean light) {
+        return PlainItem.builder().id(id).name(id).description("d").light(light).build();
+    }
+
+    /** World with matches/torch/lit_torch/shovel and the given recipes; player in an empty room. */
+    private GameContext ctx(Combination... recipes) {
+        Map<String, Item> items = new LinkedHashMap<>();
+        items.put("matches", plain("matches", false));
+        items.put("torch", plain("torch", false));
+        items.put("lit_torch", plain("lit_torch", true));
+        items.put("shovel", plain("shovel", false));
+        Map<String, Combination> combos = new HashMap<>();
+        for (Combination c : recipes) {
+            combos.put(c.key(), c);
+        }
+        Room start = new Room("start", "Start", "d");
+        World w = new World(Map.of("start", start), items, Map.of(), "t", "w",
+                Map.of(), List.of(), combos);
+        return new GameContext(w, new Player(start, 0), new TestIO());
+    }
+
+    private void give(GameContext ctx, String id) {
+        ctx.getPlayer().addItem(ctx.getWorld().getItems().get(id));
+    }
+
+    private void putInRoom(GameContext ctx, String id) {
+        ctx.getPlayer().getCurrentRoom().addItem(ctx.getWorld().getItems().get(id));
+    }
+
+    private String out(GameContext ctx) {
+        return ((TestIO) ctx.getIo()).allOutput();
+    }
+
+    private Combination torchRecipe() {
+        return new Combination("matches", "torch", List.of(),
+                List.of("matches", "torch"), "lit_torch", List.of(),
+                "You light the torch.", null);
+    }
+
+    @Test
+    void combinesFromInventory() {
+        GameContext ctx = ctx(torchRecipe());
+        give(ctx, "matches");
+        give(ctx, "torch");
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+        assertThat(ctx.getPlayer().hasItem("matches")).isFalse();
+        assertThat(ctx.getPlayer().hasItem("torch")).isFalse();
+        assertThat(out(ctx)).contains("light the torch");
+    }
+
+    @Test
+    void matchIsOrderIndependent() {
+        GameContext ctx = ctx(torchRecipe());
+        give(ctx, "matches");
+        give(ctx, "torch");
+        Combinations.tryUse(ctx, "torch", "matches");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+    }
+
+    @Test
+    void consumesOperandFromCurrentRoom() {
+        GameContext ctx = ctx(torchRecipe());
+        give(ctx, "matches");
+        putInRoom(ctx, "torch");
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+        assertThat(ctx.getPlayer().getCurrentRoom().findItem("torch")).isEmpty();
+    }
+
+    @Test
+    void missingOperandReportsNoSuch() {
+        GameContext ctx = ctx(torchRecipe());
+        give(ctx, "matches"); // torch absent
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(out(ctx)).contains("no 'torch'");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isFalse();
+    }
+
+    @Test
+    void noRecipeForPairSaysNothingHappens() {
+        GameContext ctx = ctx(torchRecipe());
+        give(ctx, "shovel");
+        give(ctx, "torch");
+        Combinations.tryUse(ctx, "shovel", "torch");
+        assertThat(out(ctx)).contains("Nothing happens.");
+    }
+
+    @Test
+    void unmetRequiresShowsFailTextAndDoesNotProduce() {
+        Combination gated = new Combination("matches", "torch",
+                List.of(new Condition(Condition.Type.FLAG, "dry")),
+                List.of("matches", "torch"), "lit_torch", List.of(),
+                "It catches.", "The torch is too damp to light.");
+        GameContext ctx = ctx(gated);
+        give(ctx, "matches");
+        give(ctx, "torch");
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(out(ctx)).contains("too damp");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isFalse();
+        assertThat(ctx.getPlayer().hasItem("matches")).isTrue(); // not consumed
+    }
+
+    @Test
+    void metRequiresAppliesEffectsAndProduces() {
+        Combination gated = new Combination("matches", "torch",
+                List.of(new Condition(Condition.Type.FLAG, "dry")),
+                List.of("matches", "torch"), "lit_torch",
+                List.of(new Effect(Effect.Type.SET_FLAG, "torch_lit")),
+                "It catches.", "too damp");
+        GameContext ctx = ctx(gated);
+        ctx.getState().set("dry");
+        give(ctx, "matches");
+        give(ctx, "torch");
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+        assertThat(ctx.getState().isSet("torch_lit")).isTrue();
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=CombinationsTest`
+Expected: FAIL — `Combinations` does not exist.
+
+- [ ] **Step 3: Create `Combinations`**
+
+`src/main/java/thb/jeanluc/adventure/game/Combinations.java`:
+```java
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.item.Item;
+
+/**
+ * Applies {@code use X on Y} item combinations. Stateless utility, mirroring
+ * {@link Conditions}/{@link Effects}/{@link Light}. Operands resolve from the
+ * player's inventory or the current room.
+ */
+public final class Combinations {
+
+    private Combinations() {
+    }
+
+    /**
+     * Attempts to combine the two named items. Prints a resolution error if an
+     * operand is absent, the recipe's {@code failText} (or a generic line) if a
+     * recipe's requirements are unmet, "Nothing happens." if there is no recipe,
+     * or applies consume/produce/effects + the response on success.
+     */
+    public static void tryUse(GameContext ctx, String idX, String idY) {
+        if (!present(ctx, idX)) {
+            ctx.getIo().write(noSuch(idX));
+            return;
+        }
+        if (!present(ctx, idY)) {
+            ctx.getIo().write(noSuch(idY));
+            return;
+        }
+        Combination c = ctx.getWorld().getCombinations().get(Combination.key(idX, idY));
+        if (c == null) {
+            ctx.getIo().write("Nothing happens.");
+            return;
+        }
+        if (!Conditions.all(c.requires(), ctx)) {
+            ctx.getIo().write(c.failText() != null ? c.failText() : "Nothing happens.");
+            return;
+        }
+        for (String id : c.consume()) {
+            removeFromAnywhere(ctx, id);
+        }
+        if (c.produce() != null) {
+            Item produced = ctx.getWorld().getItems().get(c.produce());
+            if (produced != null) {
+                ctx.getPlayer().addItem(produced);
+            }
+        }
+        Effects.applyAll(c.effects(), ctx);
+        ctx.getIo().write(c.response());
+    }
+
+    private static boolean present(GameContext ctx, String id) {
+        return ctx.getPlayer().hasItem(id)
+                || ctx.getPlayer().getCurrentRoom().findItem(id).isPresent();
+    }
+
+    private static void removeFromAnywhere(GameContext ctx, String id) {
+        if (ctx.getPlayer().removeItem(id).isEmpty()) {
+            ctx.getPlayer().getCurrentRoom().removeItem(id);
+        }
+    }
+
+    private static String noSuch(String id) {
+        return "There is no '" + id + "' here or in your inventory.";
+    }
+}
+```
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=CombinationsTest`
+Expected: PASS (7 tests).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/game/Combinations.java \
+        src/test/java/thb/jeanluc/adventure/game/CombinationsTest.java
+git commit -m "feat(game): Combinations engine for use X on Y"
+```
+
+---
+
+## Task 5: Route `UseCommand` to combinations
+
+**Files:**
+- Modify: `src/main/java/thb/jeanluc/adventure/command/impl/UseCommand.java`
+- Test: `src/test/java/thb/jeanluc/adventure/command/impl/UseCommandComboTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/command/impl/UseCommandComboTest.java`:
+```java
+package thb.jeanluc.adventure.command.impl;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.World;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.PlainItem;
+import thb.jeanluc.adventure.model.item.SwitchableItem;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class UseCommandComboTest {
+
+    private GameContext ctx() {
+        Map<String, Item> items = new LinkedHashMap<>();
+        items.put("matches", PlainItem.builder().id("matches").name("Matches").description("d").light(false).build());
+        items.put("torch", PlainItem.builder().id("torch").name("Torch").description("d").light(false).build());
+        items.put("lit_torch", PlainItem.builder().id("lit_torch").name("Lit Torch").description("d").light(true).build());
+        SwitchableItem lamp = SwitchableItem.builder()
+                .id("lamp").name("Lamp").description("d").light(true)
+                .onText("The lamp glows.").offText("off").state(false).effects(List.of()).build();
+        items.put("lamp", lamp);
+        Combination recipe = new Combination("matches", "torch", List.of(),
+                List.of("matches", "torch"), "lit_torch", List.of(), "You light the torch.", null);
+        Room start = new Room("start", "Start", "d");
+        World w = new World(Map.of("start", start), items, Map.of(), "t", "w",
+                Map.of(), List.of(), Map.of(recipe.key(), recipe));
+        GameContext ctx = new GameContext(w, new Player(start, 0), new TestIO());
+        ctx.getPlayer().addItem(items.get("matches"));
+        ctx.getPlayer().addItem(items.get("torch"));
+        ctx.getPlayer().addItem(lamp);
+        return ctx;
+    }
+
+    @Test
+    void emptyArgsAsksWhat() {
+        GameContext ctx = ctx();
+        new UseCommand().execute(ctx, List.of());
+        assertThat(((TestIO) ctx.getIo()).allOutput()).contains("Use what?");
+    }
+
+    @Test
+    void twoArgsRoutesToCombination() {
+        GameContext ctx = ctx();
+        new UseCommand().execute(ctx, List.of("matches", "torch"));
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+        assertThat(((TestIO) ctx.getIo()).allOutput()).contains("light the torch");
+    }
+
+    @Test
+    void oneArgUsesItemDirectly() {
+        GameContext ctx = ctx();
+        new UseCommand().execute(ctx, List.of("lamp"));
+        assertThat(((SwitchableItem) ctx.getWorld().getItems().get("lamp")).isOn()).isTrue();
+        assertThat(((TestIO) ctx.getIo()).allOutput()).contains("lamp glows");
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=UseCommandComboTest`
+Expected: FAIL — `twoArgsRoutesToCombination` fails (current `UseCommand` treats only the first arg, no combination).
+
+- [ ] **Step 3: Add the combination branch to `UseCommand`**
+
+In `src/main/java/thb/jeanluc/adventure/command/impl/UseCommand.java`:
+
+Add the import:
+```java
+import thb.jeanluc.adventure.game.Combinations;
+```
+
+Insert the two-arg branch in `execute`, right after the empty-args check and before `String itemId = args.getFirst();`:
+```java
+        if (args.size() >= 2) {
+            Combinations.tryUse(ctx, args.get(0), args.get(1));
+            return;
+        }
+```
+
+Also update the `help()` text:
+```java
+    @Override
+    public String help() {
+        return "use <item>  -  use an item; or  use <item> on <item>  to combine them";
+    }
+```
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=UseCommandComboTest`
+Expected: PASS (3 tests).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/command/impl/UseCommand.java \
+        src/test/java/thb/jeanluc/adventure/command/impl/UseCommandComboTest.java
+git commit -m "feat(command): route use X on Y to the combination engine"
+```
+
+---
+
+## Task 6: Loader wiring + demo content
+
+**Files:**
+- Modify: `src/main/java/thb/jeanluc/adventure/loader/WorldLoader.java`
+- Modify: `src/main/resources/world/items.yaml`
+- Modify: `src/main/resources/world/rooms.yaml`
+- Create: `src/main/resources/world/combinations.yaml`
+- Test: `src/test/java/thb/jeanluc/adventure/loader/CombinationLoadingTest.java`
+
+- [ ] **Step 1: Write the failing test**
+
+`src/test/java/thb/jeanluc/adventure/loader/CombinationLoadingTest.java`:
+```java
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.game.Combinations;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.GameSession;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Combination;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CombinationLoadingTest {
+
+    @Test
+    void realWorldLoadsTheTorchRecipe() {
+        WorldLoader.LoadResult loaded = new WorldLoader().load();
+        assertThat(loaded.world().getCombinations())
+                .containsKey(Combination.key("matches", "torch"));
+        assertThat(loaded.world().getItems()).containsKeys("matches", "torch", "lit_torch");
+    }
+
+    @Test
+    void torchRecipeWorksEndToEnd() {
+        WorldLoader.LoadResult loaded = new WorldLoader().load();
+        GameContext ctx = new GameContext(
+                new GameSession(loaded.world(), loaded.player(), "test"), new TestIO());
+        // grab the demo items straight from the registry, regardless of room
+        ctx.getPlayer().addItem(ctx.getWorld().getItems().get("matches"));
+        ctx.getPlayer().addItem(ctx.getWorld().getItems().get("torch"));
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run: `mvn -q test -Dtest=CombinationLoadingTest`
+Expected: FAIL — no `combinations.yaml`/`matches` items yet; `getCombinations()` is empty.
+
+- [ ] **Step 3: Wire `WorldLoader`**
+
+In `src/main/java/thb/jeanluc/adventure/loader/WorldLoader.java`:
+
+Add imports:
+```java
+import thb.jeanluc.adventure.loader.dto.CombinationDto;
+import thb.jeanluc.adventure.model.Combination;
+```
+
+In `load()`, add the read alongside the other optional reads (after the `endingDtos` line):
+```java
+        List<CombinationDto> combinationDtos =
+                readListOptional(basePath + "/combinations.yaml", CombinationDto.class);
+```
+
+After the `endings` list is built (and after `items` is populated), build the combinations map:
+```java
+        Map<String, Combination> combinations = new HashMap<>();
+        for (CombinationDto dto : combinationDtos) {
+            Combination c = CombinationFactory.fromDto(dto, items);
+            String key = c.key();
+            if (combinations.containsKey(key)) {
+                throw new WorldLoadException("Duplicate combination for pair '" + key + "'");
+            }
+            combinations.put(key, c);
+        }
+```
+
+Change the `World` construction to the 8-arg form:
+```java
+        World world = new World(rooms, items, npcs,
+                gameDto.title(), gameDto.welcomeMessage(), quests, endings, combinations);
+```
+
+- [ ] **Step 4: Add demo items to `items.yaml`**
+
+Append to `src/main/resources/world/items.yaml`:
+```yaml
+
+- type: plain
+  id: matches
+  name: Box of Matches
+  description: A small box of dry matches. They rattle when you shake it.
+
+- type: plain
+  id: torch
+  name: Unlit Torch
+  description: A pitch-soaked torch, waiting for a flame.
+
+- type: plain
+  id: lit_torch
+  name: Lit Torch
+  description: A burning torch, throwing back the dark.
+  light: true
+```
+
+- [ ] **Step 5: Place demo items in rooms**
+
+In `src/main/resources/world/rooms.yaml`:
+- Change the `library` room's items line from `items: [shovel]` to:
+```yaml
+  items: [shovel, matches]
+```
+- Change the `hallway` room's items line from `items: []` to:
+```yaml
+  items: [torch]
+```
+
+- [ ] **Step 6: Create `combinations.yaml`**
+
+`src/main/resources/world/combinations.yaml`:
+```yaml
+- a: matches
+  b: torch
+  consume: [matches, torch]
+  produce: lit_torch
+  response: |
+    You strike a match and touch it to the torch; it catches with a low hiss
+    and burns steady. You now hold a lit torch.
+```
+
+- [ ] **Step 7: Run tests to verify they pass**
+
+Run: `mvn -q test -Dtest=CombinationLoadingTest`
+Expected: PASS (2 tests).
+
+- [ ] **Step 8: Full suite (no regressions from new items)**
+
+Run: `mvn -q clean test`
+Expected: BUILD SUCCESS, all tests green. (WorldLoaderTest uses its own test fixture base, not these production resources, so it is unaffected.)
+
+- [ ] **Step 9: Commit**
+
+```bash
+git add src/main/java/thb/jeanluc/adventure/loader/WorldLoader.java \
+        src/main/resources/world/items.yaml \
+        src/main/resources/world/rooms.yaml \
+        src/main/resources/world/combinations.yaml \
+        src/test/java/thb/jeanluc/adventure/loader/CombinationLoadingTest.java
+git commit -m "feat(loader): load combinations.yaml; demo matches+torch -> lit_torch"
+```
+
+---
+
+## Task 7: Docs
+
+**Files:**
+- Modify: `docs/enhancement-ideas.md`
+
+- [ ] **Step 1: Mark the combination mechanic implemented**
+
+In `docs/enhancement-ideas.md`, under section **5b** (Mechanik-Spine), add a `> ✅`
+blockquote note after the bullet for mechanic **4. Item-Kombination**, mirroring
+the existing `> ✅ umgesetzt (Branch ...)` style used for light/darkness etc.:
+
+> ✅ umgesetzt (Branch `feature/use-x-on-y`): `use X on Y` als datengetriebene
+> Rezepte (`combinations.yaml`: requires/consume/produce/effects/response/failText),
+> Operanden aus Inventar oder Raum, reihenfolge-unabhängig. Kein Parser-Eingriff
+> (`on`/`with`/`to` sind bereits Filler). Demo: `matches` + `torch` → `lit_torch`
+> (dauerhafte Lichtquelle).
+
+- [ ] **Step 2: Commit**
+
+```bash
+git add docs/enhancement-ideas.md
+git commit -m "docs: mark use X on Y item combination implemented"
+```
+
+---
+
+## Final Verification
+
+- [ ] `mvn -q clean test` — all tests pass (162 prior + the new combination suites).
+- [ ] Manual console smoke (optional): start a game, navigate to the hallway (`take torch`) and library (`take matches`), then `use matches on torch` → "You ... lit torch"; `inventory` shows `lit_torch`, `matches`/`torch` gone.
+- [ ] `git status` clean.

Semesterprojekt/docs/superpowers/specs/2026-05-31-endings-design.md

@@ -0,0 +1,116 @@
+# Spec: Win-Condition & Enden (Teilprojekt 3.3)
+
+Stand: 2026-05-31. Capstone des Quest-Systems. Baut auf Fundament (3.1) + Quests
+(3.2) auf: Conditions/Effects/Flags + QuestLog sind vorhanden.
+
+## 1. Kontext & Ziel
+
+Das Spiel endet bisher nur per `quit`. Ziel: **mehrere, priorisierte Enden**,
+condition-driven (Ansatz wie Quests), plus ein **End-Screen mit Zusammenfassung**
+(Züge, abgeschlossene Quests, Rang). Bestätigt: **A mit Summary**.
+
+## 2. Scope
+
+**In Scope:**
+- `Ending`-Datenmodell + optionale `endings.yaml` (Reihenfolge = Priorität).
+- `EndingEngine` (erstes passendes Ende ermitteln + End-Screen rendern).
+- `Game`-Anbindung: pro Zug nach dem Quest-Tick prüfen; bei Treffer Ende +
+  Summary ausgeben und `stop()`.
+- End-Summary: Züge, Quests X/Y, Rang.
+- Loader: `EndingDto`, `EndingFactory`, `World.endings`.
+- Demo: zwei spielbar erreichbare Enden ohne neue Mechanik.
+
+**Out of Scope:** Scoreboard/Persistenz; zugbasierte Conditions; Spielstand-Reset.
+
+## 3. Datenmodell (model)
+
+```java
+public record Ending(String id, String title, boolean victory,
+                     List<Condition> when, String text) { /* when: List.copyOf */ }
+```
+`endings.yaml` (geordnete Liste, erstes passendes gewinnt):
+```yaml
+- id: victory
+  title: "The Manor Reclaimed"
+  victory: true
+  when: [{ flag: manor_secured }]
+  text: |
+    The lights hold steady, the whispers fade. You've made the manor yours.
+- id: fled
+  title: "Into the Night"
+  victory: false
+  when: [{ flag: fled }]
+  text: |
+    You bolt through the front door. Safe — but the manor keeps its secrets.
+```
+
+## 4. Engine (game)
+
+- `EndingEngine.triggered(GameContext ctx)` → erstes `Ending`, dessen `when` via
+  `Conditions.all` gilt, sonst `null`. Rein, testbar (Priorität/erster Treffer).
+- `EndingEngine.render(Ending e, GameContext ctx, int turns)` → `StyledText`:
+  Titel-Banner + `text` + Summary.
+- **Summary**: `Turns: N`, `Quests completed: X / Y`
+  (`X = questLog.completed().size()`, `Y = world.getQuests().size()`), plus
+  **Rang**:
+  - victory & alle Quests → „Master of the Manor"
+  - victory → „Manor Reclaimed"
+  - sonst → „Escaped — the manor keeps its secrets"
+
+## 5. Game-Anbindung
+
+In `Game.run` nach `publishHud()` (Initial **und** pro Schleifendurchlauf) ein
+`maybeEnd()`:
+```java
+private void maybeEnd() {
+    Ending e = EndingEngine.triggered(ctx);
+    if (e != null) {
+        ctx.getIo().print(EndingEngine.render(e, ctx, turn));
+        stop();
+    }
+}
+```
+`stop()` setzt `running=false`; die Schleife endet sauber, kein zusätzlicher Prompt.
+Konsole: Programm endet. GUI: Worker-Thread endet, Fenster bleibt mit End-Screen.
+
+## 6. Loading
+
+- `EndingDto(id, title, Boolean victory, List<ConditionDto> when, String text)`.
+- `EndingFactory.fromDto` baut `Ending` (`when` via `ConditionDto.toModelList`).
+- `WorldLoader` liest `endings.yaml` **optional** (`readListOptional`), baut eine
+  **geordnete** `List<Ending>` (Reihenfolge der YAML-Liste), `requireUniqueIds("ending", …)`.
+- `World` bekommt Feld `endings` (List) + **rückwärtskompatible 5- und
+  6-Arg-Konstruktoren** (leere Quests/Endings), damit bestehende `new World(...)`-
+  Aufrufe (Tests, bisheriger Loader-Pfad) unverändert kompilieren. Der Loader nutzt
+  den vollen 7-Arg-Konstruktor.
+
+## 7. Fehlerbehandlung
+
+| Fall | Verhalten |
+|---|---|
+| `endings.yaml` fehlt | leere Liste → Spiel endet nur per `quit` (wie bisher) |
+| mehrere Conditions treffen | erstes Ende in Listenreihenfolge gewinnt |
+| Ending ohne `when` | trifft sofort (leere Condition-Liste = true) – Autoren sollten Reihenfolge beachten |
+| keine Quests definiert | Summary zeigt `0 / 0`, Rang nach victory-Flag |
+
+## 8. Demonstration (zwei erreichbare Enden, keine neue Mechanik)
+
+- **victory**: `manor_secured` wird gesetzt, wenn die `restore_power`-Quest endet
+  (bereits vorhanden) → Sieg-Ende.
+- **fled**: neuer schaltbarer Gegenstand **Front Door** (`effects: setFlag fled`)
+  in der Küche → Flucht-Ende. `victory` steht vor `fled`, also schlägt das
+  Sichern der Villa die Flucht.
+
+## 9. Testing
+
+- `EndingEngine.triggered`: Priorität/erster Treffer; kein Treffer → `null`.
+- `EndingEngine.render`: enthält Titel, Text, Züge, Quests-Zähler, Rang.
+- `EndingFactory.fromDto`: Mapping inkl. victory/when/text.
+- End-to-End (Konsole): Villa sichern → Sieg-Ende + Summary, Spiel endet;
+  alternativ Front Door benutzen → Flucht-Ende.
+- `Game`-Integration: nicht separat unit-getestet (Loop/IO); über Konsolen-Smoke.
+
+## 10. Offene Detailfragen (in Implementierung)
+
+- Genaue Banner-Optik des End-Screens (HEADING-Rahmen).
+- Rang-Schwellen (zunächst nur victory + alle-Quests-Abfrage).

Semesterprojekt/docs/superpowers/specs/2026-05-31-light-darkness-design.md

@@ -0,0 +1,87 @@
+# Spec: Licht & Dunkelheit (Mechanik-Erweiterung)
+
+Stand: 2026-05-31. Kleine Mechanik aus dem Spine (#3 der Mechanik-Liste), die das
+Fundament (Flags/Items) nutzt. Strenge: **Modell B** (Dunkelheit blockiert).
+
+## 1. Kontext & Ziel
+
+Dunkle Räume sollen den schaltbaren `lamp` sinnvoll machen: Ohne aktive
+Lichtquelle kann man einen dunklen Raum **nicht betreten**, nichts sehen
+(`look`), und nichts aufnehmen/untersuchen. Die HUD-Zeile `light: on/off` wird
+endlich verdrahtet.
+
+## 2. Scope
+
+**In Scope:**
+- `Room.dark` (Bool, optional), `Item.light` (Bool, optional).
+- `Light`-Helper: `isLit`, `carryingLight`.
+- Command-Gating: `go` (Eintritt), `look`, `take`, `examine`; HUD-`lightOn`.
+- Demo: Dungeon dunkel → Lampe nötig.
+
+**Out of Scope:** Lampen-Brennstoff/zeitlich begrenztes Licht; Lichtradius über
+Räume hinweg; Zufall.
+
+## 3. Daten (rückwärtskompatibel)
+
+- **`Room.dark`**: `@Setter`-Feld (default `false`), **kein** Konstruktor-Argument →
+  keine Test-Brüche. Vom `RoomFactory` aus `RoomDto.dark` gesetzt. YAML: `dark: true`.
+- **`Item.light`**: `boolean` am abstrakten `Item` (via `@SuperBuilder`), default
+  `false`. Vom `ItemFactory` aus `ItemDto.light` gesetzt. YAML: `light: true`.
+- **Aktive Lichtquelle** = `item.light` **und** (kein Switchable **oder**
+  `SwitchableItem.isOn()`). Die `lamp` leuchtet also nur eingeschaltet.
+
+## 4. Helper `Light` (game)
+
+```java
+static boolean isLit(GameContext ctx, Room room) {
+    if (!room.isDark()) return true;
+    return hasActiveLight(player-inventory) || hasActiveLight(room-items);
+}
+static boolean carryingLight(GameContext ctx);  // aktive Lichtquelle im Inventar
+```
+`hasActiveLight(items)` iteriert; `isActiveLight(item)` = `item.isLight()` &&
+(`!(item instanceof SwitchableItem s)` || `s.isOn()`).
+
+Räume gelten als beleuchtet, wenn sie nicht dunkel sind **oder** eine aktive
+Lichtquelle getragen wird **oder** im Raum liegt.
+
+## 5. Command-Gating (Modell B)
+
+| Command | Verhalten bei dunklem, unbeleuchtetem Zielraum/aktuellem Raum |
+|---|---|
+| `GoCommand` | **Eintritt blockiert**, wenn `!isLit(ctx, target)`: Hinweis-Text, kein Wechsel. (Lichträume bleiben immer betretbar → **kein Soft-Lock**, Rückzug stets möglich.) |
+| `LookCommand` | `!isLit(ctx, current)` → „It's pitch black; you can't make anything out." statt `RoomView` (Fall: Lampe ging im Raum aus). |
+| `TakeCommand` | `!isLit(ctx, current)` → „It's too dark to see that." |
+| `ExamineCommand` | `!isLit(ctx, current)` → „It's too dark to see that." |
+| HUD | `lightOn` = `Light.carryingLight(ctx)` (in `Game.publishHud`). |
+
+Erlaubt im Dunkeln bleiben: `inventory`, `drop`, **`use`** (z. B. Lampe anzünden),
+`quests`, `map`, `help`. So kann man eine getragene Lampe im Dunkeln anzünden.
+
+## 6. Fehlerbehandlung / Soft-Lock
+
+Eintrittssperre statt Innen-Sperre: Man betritt einen dunklen Raum nur **mit**
+Licht. Geht das Licht drinnen aus, sind `look`/`take`/`examine` blockiert, aber der
+Rückweg in einen hellen Raum bleibt (Zielraum hell → `isLit` true). Kein Soft-Lock.
+
+## 7. Demo
+
+- `lamp`: `light: true` (bereits schaltbar; `use lamp` → an).
+- `dungeon`: `dark: true`; der Generator steht dort. Ablauf:
+  `take lamp` → `use lamp` (an) → `go south` (jetzt betretbar) → `use generator`.
+  HUD zeigt `light: on`, sobald die Lampe brennt. Gibt man die Lampe später dem
+  alten Mann, verliert man das Licht (thematisch).
+
+## 8. Testing
+
+- `Light.isLit`: nicht dunkel → hell; dunkel ohne Licht → dunkel; dunkel + getragene
+  brennende Lampe → hell; dunkel + Lampe **aus** → dunkel; dunkel + brennende Lampe
+  **im Raum** → hell. `carryingLight`.
+- Command-Gates: `go` in dunklen Raum ohne Licht blockt, mit brennender Lampe ok;
+  `look`/`take` im dunklen Raum blockt.
+- End-to-End (Konsole): `go south` ohne Licht blockt; `take lamp`/`use lamp`/`go south`
+  betritt; HUD `light: on`.
+
+## 9. Offene Detailfragen (in Implementierung)
+
+- Genauer Hinweis-Text der Eintrittssperre (nennt `use lamp`).

Semesterprojekt/docs/superpowers/specs/2026-05-31-map-design.md

@@ -0,0 +1,151 @@
+# Spec: Karte / Mini-Map (Teilprojekt 2)
+
+Stand: 2026-05-31. Zweites Teilprojekt aus [enhancement-ideas.md](../../enhancement-ideas.md).
+Baut auf der Präsentations-Schicht (Teilprojekt 1) auf, insbesondere dem
+reservierten GUI-Seitenpanel und dem semantischen Modell-+-Renderer-Muster.
+
+## 1. Kontext & Ziel
+
+Räume bilden bereits einen gerichteten N/S/O/W-Graphen über `Room.exits`
+(`EnumMap<Direction, Room>`). Ziel: eine **Karte** in beiden Frontends, die diesen
+Graphen sichtbar macht – **Fog of War** (nur Entdecktes), Stil **„umrandete Räume +
+Korridore"** (im Brainstorming bestätigt). Die GUI zeichnet grafisch (Graphics2D),
+die Konsole spiegelt es als ASCII.
+
+Bestätigte Entscheidungen:
+- **Fog of War**: nur besuchte Räume + deren direkte Nachbarn als `?`-Stub.
+- **Stil**: umrandete Räume, durch Korridore verbunden; aktueller Raum hervorgehoben.
+- **Layout aus dem Graphen abgeleitet** (keine Koordinaten in YAML).
+- GUI: persistentes Panel ersetzt die Exit-Zeile. Konsole: `map`-Befehl on demand,
+  Exit-Zeile im Raumtext bleibt.
+
+## 2. Scope
+
+**In Scope:**
+- `MapView`-Modell (platzierte Zellen + Verbindungen, Zustände).
+- `MapLayout`-Service: BFS-Layout aus dem Exit-Graphen + Fog-of-War-Filter.
+- **Besuchte-Räume-Tracking** auf `Player`.
+- `GameIO`: `setMap` (Push pro Zug, GUI) + `showMap` (on demand, Konsole).
+- `MapCommand` (`map`, `m`).
+- `Game`-Loop ruft `setMap` pro Zug (neben `setHud`).
+- GUI: `MapPanel` (Graphics2D) im Seitenpanel, scrollbar, auf aktuellen Raum zentriert.
+- Konsole: ASCII-Karte (`AsciiMap`), respektiert `GlyphMode`.
+
+**Out of Scope (spätere Teilprojekte):**
+- Marker für Items/NPCs auf der Karte.
+- Styling für verschlossene/blockierte Exits (Quest-Teilprojekt; Karte bekommt
+  später einen Hook dafür).
+- Zoom über das Scrollen hinaus.
+
+## 3. Architektur (Modell + Renderer pro Frontend)
+
+`MapLayout` erzeugt aus `World` (Exit-Graph), der Menge besuchter Räume und dem
+aktuellen Raum eine frontend-agnostische `MapView`. Layout und Fog-of-War-Logik
+liegen ausschließlich hier; die Renderer kennen nur das fertige `MapView`.
+
+```mermaid
+flowchart LR
+    W["World (Exit-Graph)"] --> L["MapLayout.compute()"]
+    V["Player.visitedRoomIds"] --> L
+    C["aktueller Raum"] --> L
+    L --> MV["MapView (Zellen + Verbindungen)"]
+    MV -- "setMap()" --> GUI["SwingIO → MapPanel (Graphics2D)"]
+    MV -- "showMap()" --> CON["ConsoleIO → AsciiMap (StyledText)"]
+```
+
+## 4. Komponenten & Datenmodell
+
+Views in `io.text`, Layout-Logik in neuem Package `map`, GUI-Panel in `io`.
+
+```java
+// io.text
+public enum CellState { CURRENT, VISITED, KNOWN }
+
+public record RoomCell(String id, String name, int x, int y, CellState state) {}
+
+public record Connection(RoomCell from, RoomCell to) {}   // Stil via Zellzustand
+
+public record MapView(java.util.List<RoomCell> cells,
+                      java.util.List<Connection> connections) {
+    public MapView { cells = List.copyOf(cells); connections = List.copyOf(connections); }
+}
+```
+
+- `map.MapLayout` – `static MapView compute(World world, String startRoomId, Set<String> visited, Room current)`.
+- `io.text.AsciiMap` – `static StyledText render(MapView, GlyphMode)`.
+- `io.MapPanel` – `JComponent`, `void show(MapView)`; `paintComponent` zeichnet.
+- `command.impl.MapCommand` – baut `MapView`, ruft `io.showMap(view)`.
+- `model.Player` – `Set<String> visitedRoomIds` (LinkedHashSet, Reihenfolge stabil).
+
+### GameIO-Erweiterung (additiv)
+
+```java
+/** Push pro Zug: GUI aktualisiert ihr Panel; Konsole ignoriert (kein Spam). */
+default void setMap(MapView view) { /* no-op */ }
+
+/** On demand (map-Befehl): rendert die Karte. Default = ASCII in UNICODE. */
+default void showMap(MapView view) { print(AsciiMap.render(view, GlyphMode.UNICODE)); }
+```
+
+- **`ConsoleIO`** überschreibt `showMap` → `print(AsciiMap.render(view, this.glyphs))`
+  (nutzt also seinen konfigurierten Glyph-Modus). `setMap` bleibt Default (no-op) →
+  kein Karten-Spam pro Zug in der Konsole.
+- **`SwingIO`** überschreibt `setMap` → `MapPanel` neu zeichnen; `showMap` → no-op
+  (das Panel ist ohnehin sichtbar).
+- **`TestIO`** nutzt beide Defaults: `setMap` = no-op, `showMap` druckt UNICODE-ASCII
+  in `outputs` → `MapCommand`-Test kann darauf assertieren. Kein Override nötig.
+
+So liegt der Glyph-Modus dort, wo er hingehört (am Konsolen-Renderer), ohne die
+`GameIO`-Schnittstelle um eine Glyph-Methode aufzublähen.
+
+## 5. Fog-of-War-Regeln
+
+| Zustand | Bedeutung | Darstellung |
+|---|---|---|
+| `CURRENT` | besuchter Raum, in dem der Spieler steht | Goldener Rahmen |
+| `VISITED` | bereits betretener Raum | heller Rahmen + Name |
+| `KNOWN` | direkter Exit-Nachbar eines besuchten Raums, noch nicht betreten | gestrichelter `?`-Stub |
+| (hidden) | alles andere | nicht platziert |
+
+Beim Betreten eines `?`-Raums wird er `VISITED`; seine Nachbarn werden zu neuen
+`KNOWN`-Stubs. Die Karte wächst eine Ringschicht voraus.
+
+## 6. Layout-Algorithmus & Konfliktbehandlung
+
+BFS vom Startraum über den **vollständigen** Exit-Graphen; jede Richtung verschiebt
+die Gitterkoordinate (N→y−1, S→y+1, O→x+1, W→x−1). Hand-gebaute Welten sind
+geometrisch konsistent; falls BFS zwei Räume auf dieselbe Zelle legt (nicht-planarer
+Graph), **gewinnt der erste**, die Kollision wird geloggt, das Rendern läuft weiter
+(kein Crash). Die Fog-of-War-Filterung läuft nach dem Layout; danach werden die
+Koordinaten normalisiert (Verschiebung, sodass min = 0,0).
+
+## 7. Konsolen-Verhalten
+
+`map` / `m` druckt die ASCII-Karte on demand (keine persistente Region in der
+Konsole). Die Box-Raumansicht behält ihre Inline-`Exits:`-Zeile – Konsolenspieler
+müssen also nicht `map` tippen, um zu navigieren; die Karte ist Überblick-Bonus. In
+der GUI ersetzt das Dauerpanel die Exit-Zeile.
+
+## 8. Fehlerbehandlung
+
+| Fall | Verhalten |
+|---|---|
+| Koordinaten-Kollision (nicht-planar) | erste Zuordnung gewinnt, Warnung geloggt, Rendern fährt fort |
+| Startraum hat keine Exits | Karte zeigt nur die aktuelle Zelle |
+| Sehr große Karte (viele Räume) | GUI-Panel scrollbar, auf aktuelle Zelle zentriert; ASCII so groß wie nötig |
+
+## 9. Testing
+
+- `MapLayout` (reine Logik): Koordinaten aus bekanntem Graphen; Fog-Zustände für eine
+  gegebene Visited-Menge; Kollisionsbehandlung; Normalisierung.
+- `MapView`/Records: Immutabilität.
+- `AsciiMap`: strukturelle Assertions auf bekanntem `MapView` (Namen vorhanden,
+  aktueller markiert, `?` für `KNOWN`), Farbe aus.
+- `MapCommand`: über `TestIO` – erzeugt Karten-Ausgabe.
+- `Player`: Besuchte-Räume-Tracking (Start + nach Bewegung).
+- `SwingIO`/`MapPanel`: nicht unit-getestet (Graphics2D/EDT); manueller Smoke-Test.
+
+## 10. Offene Detailfragen (in Implementierung entscheidbar)
+
+- ASCII-Zellbreite/-höhe und Verbindungslänge (Lesbarkeit vs. Kompaktheit).
+- Genaue Farben/Strichstärken im `MapPanel` (an Präsentations-Palette angelehnt).

Semesterprojekt/docs/superpowers/specs/2026-05-31-presentation-layer-design.md

@@ -0,0 +1,222 @@
+# Spec: Präsentations-/Ausgabe-Schicht (Teilprojekt 1)
+
+Stand: 2026-05-31. Erstes Teilprojekt aus [enhancement-ideas.md](../../enhancement-ideas.md).
+Baut auf der v1.0-Baseline (Tag `v1.0`) auf.
+
+## 1. Kontext & Ziel
+
+`GameIO` bietet aktuell nur `readLine()` + `write(String)`; beide Frontends
+(`ConsoleIO`, `SwingIO`) schieben rohen Text durch. Ziel: **reichere, strukturierte
+Ausgabe** in beiden Modi, ohne den für beide Frontends **identischen Game-Loop**
+aufzugeben (Kernwert der Architektur).
+
+Zielbild (bestätigt im Brainstorming):
+- Konsole: **Stufe B** – Boxed Heading, gelabelte Sektionen, persistente HUD-Zeile;
+  ASCII-Art nur für große Momente.
+- GUI ist der **Fokus** (mehr Freiheit), Konsole wird weiter unterstützt.
+- Semantische Farb-Rollen für Items / NPCs / Exits / Headings / Gefahr.
+- **Progressive Disclosure** (nicht überladen) und **Info auf Regionen verteilen**
+  (Karte ersetzt später die Exit-Zeile).
+
+## 2. Scope
+
+**In Scope:**
+- Semantisches Ausgabe-Modell (`Style`, `Span`, `StyledText` + Builder).
+- High-Level-Views: `RoomView`, `Hud`.
+- Erweiterung der `GameIO`-Schnittstelle (additiv, `write(String)` bleibt als Default).
+- `ConsoleIO` als Renderer: ANSI-Farben + Box-Drawing (Stufe B), HUD-Zeile,
+  ASCII-Art-Banner-Mechanismus, gestufte Glyph-Fähigkeit.
+- `SwingIO` als Renderer: Region-Layout (HUD oben, Output mittig, Seitenpanel
+  rechts reserviert, Input unten), `JTextPane`/`StyledDocument`, **gebündelter Font**.
+- Migration der bestehenden Commands auf die neue API; `TestIO` angepasst.
+
+**Out of Scope (jeweils eigene spätere Specs):**
+- Tatsächliches Zeichnen der **Karte** (Teilprojekt 2) – Seitenpanel ist nur Slot,
+  zeigt bis dahin die Exit-Liste.
+- **Hauptmenü/Settings** (6), **Speichern/Laden** (7), **Musik** (8).
+- Neue **Inhalte/Mechaniken** (Quests, Licht, Item-Kombination).
+
+Die Schnittstellen lassen bewusst Slots (Seitenpanel, HUD-Felder) für diese
+späteren Teile.
+
+## 3. Architektur (Approach 2)
+
+**Commands erzeugen Bedeutung, kein Format.** Ein Command baut ein semantisches
+Objekt (`StyledText` oder eine View) und übergibt es an `GameIO`. Jedes Frontend
+**rendert** es selbst: `ConsoleIO` → ANSI/Box-Drawing, `SwingIO` → Swing-Komponenten
+und **eigenes Layout**. Der Game-Loop bleibt unverändert.
+
+```mermaid
+flowchart LR
+    CMD["Command<br/>(z.B. LookCommand)"] -- "baut" --> VIEW["RoomView / StyledText / Hud<br/>(semantisch, kein Format)"]
+    VIEW -- "GameIO.showRoom() / print() / setHud()" --> IO{{"GameIO"}}
+    IO --> CON["ConsoleIO<br/>ANSI + Box-Drawing"]
+    IO --> GUI["SwingIO<br/>JTextPane + Panels"]
+```
+
+## 4. Komponenten & API
+
+Neues Subpackage `io.text` für das Modell **und** die Views (`Style`, `Span`,
+`StyledText`, `RoomView`, `Hud`); die Renderer (`ConsoleIO`, `SwingIO`) bleiben in `io`.
+
+### 4.1 Style (enum)
+
+```java
+public enum Style { PLAIN, HEADING, ITEM, NPC, EXIT, DANGER, DIM }
+```
+
+Kleines, bewusst begrenztes Rollen-Set. Mapping auf konkrete Farben/Attribute
+liegt im jeweiligen Renderer, nicht am Style.
+
+### 4.2 Span & StyledText
+
+```java
+public record Span(String text, Style style) {}
+
+public final class StyledText {
+    private final List<Span> spans;            // immutable
+    public List<Span> spans() { ... }
+    public String plainText() { ... }          // Spans konkateniert, ohne Format
+
+    public static StyledText of(String s) { ... }   // ein PLAIN-Span
+    public static Builder builder() { ... }
+
+    public static final class Builder {
+        Builder plain(String s);  Builder heading(String s);
+        Builder item(String s);   Builder npc(String s);
+        Builder exit(String s);   Builder danger(String s);
+        Builder dim(String s);    StyledText build();
+    }
+}
+```
+
+Beispiel:
+```java
+io.print(StyledText.builder()
+    .plain("You pick up ").item("the brass lamp").plain(".").build());
+```
+Zeilenumbrüche stehen als `\n` im Text der Spans.
+
+### 4.3 Views
+
+```java
+public record RoomView(String name, String description,
+                       List<String> items, List<String> npcs,
+                       List<String> exits) {}
+
+public record Hud(String location, int gold, int turn, boolean lightOn) {}
+```
+
+Views tragen bereits **anzeigefertige Strings** (Namen aufgelöst), aber **kein
+Layout**. `RoomView.exits` versorgt vorerst das GUI-Seitenpanel; sobald Teilprojekt 2
+die Karte zeichnet, blendet der GUI-Renderer die Exit-Sektion aus.
+
+### 4.4 GameIO (erweitert, additiv)
+
+```java
+public interface GameIO {
+    String readLine();
+    void print(StyledText text);     // gestylter Ausgabe-Block
+    void showRoom(RoomView room);    // High-Level-Raumansicht
+    void setHud(Hud hud);            // HUD-Region aktualisieren
+
+    default void write(String s) {   // Komfort + Rückwärtskompatibilität
+        print(StyledText.of(s));
+    }
+}
+```
+
+`write(String)` bleibt als Default → bestehende Aufrufstellen kompilieren weiter;
+Migration kann schrittweise erfolgen.
+
+### 4.5 ConsoleIO (Renderer)
+
+- `print`: Spans → ANSI-Sequenzen (Rollen→Farbe), dann `println`.
+- `showRoom`: Stufe-B-Layout mit Box-Drawing-Rahmen (Heading + Sektionen
+  „You see / Here is / Exits"), Rollen-Farben.
+- `setHud`: dim gefärbte Statuszeile (`[ Kitchen · 0 gold · turn 7 · light: off ]`).
+- **ASCII-Art-Banner**: Methode/Helfer für große Momente (Start, Finale); Kunst aus
+  Ressourcen geladen. Mechanismus in Scope, konkrete Kunstwerke folgen mit Inhalten.
+- **Konfiguration** (Defaults sicher, Verdrahtung mit Settings-Menü später):
+  - `ColorMode`: an/aus; Auto-Erkennung (`System.console() == null` → keine ANSI).
+  - `GlyphMode`: `ASCII | UNICODE | GLYPH`, Default `UNICODE` (Box-Drawing breit
+    unterstützt; Nerd-Glyphen nur bei explizitem Opt-in). Bei `ASCII` degradieren
+    die Rahmen auf `+`, `-`, `|` statt der Unicode-Box-Drawing-Zeichen.
+
+### 4.6 SwingIO (Renderer) + Layout
+
+Region-Layout (bestätigt, Variante A):
+- **NORTH**: HUD-Leiste (`JPanel` mit `JLabel`s) – Ort · Gold · Zug · Licht.
+- **CENTER**: `JTextPane` mit `StyledDocument` (Farben/Stile via `AttributeSet` pro
+  `Style`), scrollbar.
+- **EAST**: Seitenpanel, reserviert für Karte; zeigt bis dahin `RoomView.exits` als Liste.
+- **SOUTH**: Eingabefeld (bestehende `LinkedBlockingQueue`-Brücke bleibt).
+
+**Gebündelter Font:** `.ttf` unter `src/main/resources/fonts/`, via
+`Font.createFont(Font.TRUETYPE_FONT, stream)` geladen und registriert → Farben und
+**Glyphen funktionieren ohne Installation auf dem Spieler-System**. Fallback auf
+`Font.MONOSPACED` bei Ladefehler (geloggt).
+
+`print`/`showRoom` schreiben gestylte Spans in das `JTextPane`; `setHud` aktualisiert
+die Labels. Alle Swing-Mutationen via `SwingUtilities.invokeLater` (wie bisher).
+
+## 5. Datenfluss
+
+```
+Command → baut RoomView/StyledText/Hud → GameIO.{showRoom|print|setHud}
+        → Frontend-Renderer → Konsole (ANSI) bzw. GUI (Swing)
+```
+Game-Loop, Parser, Registry, Domain: **unverändert**.
+
+## 6. Nerd-Font / Glyph-Strategie (zusammengefasst)
+
+- **GUI**: Font mitliefern (bundled `.ttf`) → Problem gelöst, keine Installation nötig.
+- **Konsole**: Font nicht kontrollierbar → **gestufte Fallbacks** (`ASCII` →
+  `UNICODE`-Box-Drawing → `GLYPH`). Default `UNICODE`. Keine harte Abhängigkeit von
+  installierten Nerd Fonts.
+
+## 7. Migration der Commands & Tests
+
+- `LookCommand`: statt `StringBuilder` eine `RoomView` bauen → `io.showRoom(view)`.
+- Übrige Commands (`Take`, `Drop`, `Use`, `Read`, `Examine`, `Talk`, `Give`,
+  `Inventory`, `Help`): `io.print(StyledText…)` mit Rollen, wo es Mehrwert bringt;
+  sonst genügt das Default-`write(String)`. Schrittweise, nicht Big-Bang.
+- `TestIO`: implementiert `print`/`showRoom`/`setHud` durch **Flattening auf
+  Klartext** (`StyledText.plainText()` bzw. RoomView→Textblock), abgelegt in
+  `outputs`. `lastOutput()`/`allOutput()` liefern weiterhin Klartext → die
+  bestehenden `.contains(...)`-Assertions der 67 Tests bleiben gültig.
+
+## 8. Fehlerbehandlung
+
+| Fall | Verhalten |
+|---|---|
+| Gebündelter Font nicht ladbar | Log-Warnung, Fallback `Font.MONOSPACED` |
+| Terminal ohne ANSI / Umleitung | Auto-Erkennung → Farben aus, reiner Text |
+| `GlyphMode=GLYPH` ohne passende Terminal-Font | Nutzer-Opt-in; kein Auto-Fallback nötig, Default bleibt `UNICODE` |
+| `null`-Text an `StyledText.of` | `IllegalArgumentException` (wie bestehende Konventionen) |
+
+## 9. Testing-Strategie
+
+- **Unit**: `StyledText`-Builder & `plainText()`, `Span`, Immutabilität von
+  `RoomView`/`Hud`.
+- **ConsoleIO**: Rendern einer bekannten `RoomView`/`Hud` mit Farbe AUS gegen einen
+  `StringWriter`/`PrintStream` (Test-Konstruktor existiert bereits) → strukturelle
+  Assertions (Heading, Labels, Exit-Namen).
+- **Command-Tests**: laufen unverändert über das angepasste `TestIO` (Klartext).
+- **SwingIO**: nicht unit-getestet (EDT/Swing); Logik dünn halten, manueller
+  Smoke-Test. Verifikation per `mvn exec:java@gui`.
+
+## 10. Handoffs an spätere Teilprojekte
+
+- **Karte (2)**: GUI-Seitenpanel + künftige `showMap(MapView)`-Methode;
+  `RoomView.exits` ist bis dahin Platzhalter-Quelle.
+- **Menü/Settings (6)**: verdrahtet später `ColorMode`/`GlyphMode`/Lautstärke.
+- **Save (7)**, **Musik (8)**: nutzen die HUD/Region-Slots, hier nicht implementiert.
+
+## 11. Offene Detailfragen (in Implementierung entscheidbar)
+
+- Konkrete Wahl des gebündelten Fonts (freier Monospace bzw. Nerd-Font-Variante,
+  Lizenz prüfen).
+- Exakte ANSI-Farbpalette pro Rolle.
+- Ob `Hud` schon ein `lightOn` führt, obwohl die Licht-Mechanik erst mit den Inhalten
+  kommt → Feld vorsehen, vorerst konstant `false`/ausgeblendet.

Semesterprojekt/docs/superpowers/specs/2026-05-31-quest-foundation-design.md

@@ -0,0 +1,185 @@
+# Spec: Quest-Fundament – World-State & Bedingungen/Effekte (Teilprojekt 3.1)
+
+Stand: 2026-05-31. Erstes Stück des Quest-Systems (Teilprojekt 3) aus
+[enhancement-ideas.md](../../enhancement-ideas.md). Liefert die Zustands- und
+Bedingungs-/Effekt-Engine, auf der Quests (#3.2) und Enden (#3.3) aufbauen.
+
+## 1. Kontext & Ziel
+
+Das NPC-System ist heute statisch: fester `greeting`, Reaktionen
+(`consumes`/`gives`/`response`) ohne Bedingungen, kein Weltzustand. Ziel:
+**gated progression** datengetrieben ermöglichen – verschlossene Türen,
+zustandsabhängige Beschreibungen, reaktive NPCs, Schalter, die Weltzustand setzen –
+über **eine** kleine, wiederverwendbare Bedingungs-/Effekt-Sprache (Ansatz A).
+
+Scope **core-only** (bestätigt): Licht/Dunkelheit und Item-Kombination werden
+bewusst auf spätere kleine Folge-Specs verschoben.
+
+## 2. Scope
+
+**In Scope:**
+- **`GameState`** – Flag-Speicher (benannte Booleans).
+- **Condition/Effect-Modell** + Auswerter (`Conditions`) + Anwender (`Effects`).
+- Fünf Integrationspunkte: verschlossene Exits, zustandsabhängige
+  Raumbeschreibungen, bedingte NPC-Dialoge, Reaktionen mit `requires`/`effects`,
+  Schalter mit `effects`.
+- Loader/DTO/Factory/Resolver-Erweiterungen, alle neuen YAML-Felder **optional**
+  (Rückwärtskompatibilität).
+
+**Out of Scope (eigene spätere Specs):**
+- Licht & Dunkelheit; Item-Kombination (`use X on Y`).
+- Quest-Objekte, Quest-Log, GUI-Quest-Box (Teilprojekt #3.2).
+- Win-Condition / mehrere Enden (#3.3).
+- `startFlags`-Seeding (YAGNI – Flags starten leer = alle false, was der
+  Ausgangslage „Strom aus, Keller geflutet" entspricht).
+
+## 3. Kern-Engine (Ansatz A)
+
+### 3.1 GameState
+
+`GameState` (Package `game`) hält die gesetzten Flags als `Set<String>`
+(vorhanden = true). API: `isSet(name)`, `set(name)`, `clear(name)`, `all()`.
+
+`GameContext` bekommt ein **selbst-initialisiertes** Feld
+`private final GameState state = new GameState();` (per `@Getter` lesbar). Da das
+Feld initialisiert ist, bleibt der `@RequiredArgsConstructor` (world, player, io)
+**unverändert** – keine Anpassung der bestehenden Konstruktionsstellen nötig.
+
+### 3.2 Condition (Daten in `model`, Auswerter in `game`)
+
+```java
+public record Condition(Type type, String arg) {
+    public enum Type { FLAG, NOT_FLAG, HAS_ITEM }
+}
+```
+`Conditions.all(List<Condition>, GameContext)` → true, wenn alle gelten (leere
+Liste = true):
+- `FLAG` → `state.isSet(arg)`
+- `NOT_FLAG` → `!state.isSet(arg)`
+- `HAS_ITEM` → `player.hasItem(arg)`
+
+### 3.3 Effect (Daten in `model`, Anwender in `game`)
+
+```java
+public record Effect(Type type, String arg) {
+    public enum Type { SET_FLAG, CLEAR_FLAG, GIVE_ITEM, REMOVE_ITEM, SAY }
+}
+```
+`Effects.applyAll(List<Effect>, GameContext)` wendet jeden an:
+- `SET_FLAG`/`CLEAR_FLAG` → `state.set/clear(arg)`
+- `GIVE_ITEM` → Item aus `world.getItems().get(arg)` ins Inventar (unbekannt →
+  Warnung geloggt, übersprungen)
+- `REMOVE_ITEM` → `player.removeItem(arg)`
+- `SAY` → `io.write(arg)`
+
+## 4. Integrationspunkte
+
+Jeder trägt nur `requires` (Conditions) und/oder `effects` und ruft die Helfer.
+
+| # | Träger (model) | YAML-Feld | Konsument | Verhalten |
+|---|---|---|---|---|
+| 1 | `Room.exitLocks: EnumMap<Direction, ExitLock>` | `exitLocks` | `GoCommand` | Vor Bewegung: gilt `requires` nicht → `blocked` ausgeben, nicht bewegen |
+| 2 | `Room.descriptionStates: List<DescriptionState>` | `descriptionStates` | `LookCommand` | Erste passende Variante als Beschreibung, sonst `description` |
+| 3 | `Npc.dialogue: List<DialogueLine>` | `dialogue` | `TalkCommand` | Erste passende Zeile, sonst `greeting` |
+| 4 | `NpcReaction.requires/effects` | `requires`, `effects` | `GiveCommand` | `requires` prüfen; bei Erfolg consume/give wie bisher + `effects` |
+| 5 | `SwitchableItem.effects: List<Effect>` | `effects` | `use` | Beim Schalten **auf „on"**: `effects` anwenden |
+
+Hilfstypen (records in `model`): `ExitLock(List<Condition> requires, String blocked)`,
+`DescriptionState(List<Condition> when, String text)`,
+`DialogueLine(List<Condition> when, String text)`.
+
+### YAML-Beispiele
+
+```yaml
+# rooms.yaml
+exits: { east: cellar }
+exitLocks:
+  - direction: east
+    requires: [{ flag: power_on }]
+    blocked: "The cellar door won't budge without power."
+descriptionStates:
+  - when: [{ flag: power_on }]
+    text: "The cellar, now lit, reveals a workbench."
+
+# npcs.yaml
+dialogue:
+  - when: [{ flag: power_on }]
+    text: '"You did it — the lights are back!"'
+reactions:
+  - onReceive: fuse
+    requires: [{ flag: cellar_drained }]
+    response: "That'll hold now."
+    effects:
+      - { removeItem: fuse }
+      - { setFlag: fuse_installed }
+
+# items.yaml
+- id: breaker
+  type: switchable
+  name: Breaker
+  onText: "You flip the breaker. The manor hums to life."
+  offText: "You switch the breaker off."
+  state: false
+  effects:
+    - { setFlag: power_on }
+```
+
+## 5. Loading / DTO / Mapping
+
+- Neue DTOs (`loader.dto`): `ConditionDto(flag, notFlag, hasItem)`,
+  `EffectDto(setFlag, clearFlag, giveItem, removeItem, say)`, `ExitLockDto`,
+  `DescriptionStateDto`, `DialogueLineDto`. Jeweils `toModel()`.
+- Erweiterte DTOs: `RoomDto` (+`exitLocks`, +`descriptionStates`), `NpcDto`
+  (+`dialogue`), `ReactionDto` (+`requires`, +`effects`), `ItemDto` (+`effects`).
+- `ConditionDto.toModel()`: genau ein Feld gesetzt → entsprechende `Condition`,
+  sonst `WorldLoadException`. Analog `EffectDto`.
+- Verdrahtung: `ReferenceResolver.resolveRooms` baut `exitLocks` (Direction via
+  `Direction.fromString`) und `descriptionStates`; `resolveNpcs` baut `dialogue`
+  und erweitert die `NpcReaction` um `requires`/`effects`; `ItemFactory` setzt
+  `SwitchableItem.effects`.
+- **Item-Referenzen in Conditions/Effects** (`hasItem`/`giveItem`/`removeItem`)
+  werden **nicht** beim Laden aufgelöst, sondern zur Laufzeit (lazy) – kein
+  Eingriff in die strikte Resolver-Validierung; `GIVE_ITEM` unbekannt ist
+  laufzeit-tolerant (Warnung).
+
+## 6. Fehlerbehandlung
+
+| Fall | Verhalten |
+|---|---|
+| Condition/Effect-DTO ohne gesetztes Feld | `WorldLoadException` beim Laden |
+| `exitLocks` mit unbekannter Richtung | `WorldLoadException` (`Direction.fromString`) |
+| `GIVE_ITEM` mit unbekannter Item-ID | Warnung geloggt, Effekt übersprungen |
+| Neue Felder fehlen (alte YAMLs) | null → als leere Liste behandelt, lädt normal |
+| Schalter `off`→`on` mehrfach | `effects` werden bei jedem Übergang auf „on" angewendet (idempotent bei `setFlag`) |
+
+## 7. Rückwärtskompatibilität
+
+Alle neuen Felder sind optional (nullable). Bestehende `rooms.yaml`, `npcs.yaml`,
+`items.yaml` und alle Test-Fixtures laden unverändert; die 90 bestehenden Tests
+bleiben grün. `NpcReaction` behält `consumes`/`gives`/`response`.
+
+## 8. Testing
+
+- **Unit:** `GameState` (set/clear/isSet); `Conditions.all` (FLAG/NOT_FLAG/HAS_ITEM,
+  AND, leer=true); `Effects.applyAll` (alle fünf Typen, unbekanntes Item tolerant);
+  `ConditionDto.toModel`/`EffectDto.toModel` (inkl. Fehlerfall).
+- **Integration (in-Code-Welt wie bestehende Command-Tests):**
+  - `GoCommand`: gesperrter Exit blockt ohne Flag, passiert mit Flag.
+  - `LookCommand`: Beschreibung wechselt mit Flag.
+  - `TalkCommand`: Dialogzeile wechselt mit Flag, sonst `greeting`.
+  - `GiveCommand`: Reaktion mit `requires` blockt/erlaubt; `effects` setzen Flag.
+  - `SwitchableItem.use`: setzt Flag beim Einschalten.
+- **Loader:** ein Round-Trip-Test, der ein YAML mit allen neuen Feldern lädt;
+  ein Test, dass alte YAMLs ohne neue Felder weiterhin laden.
+
+## 9. Demonstration (am Ende, minimal)
+
+Eine kleine, sichere Erweiterung der echten Welt-YAMLs, um die Kette
+end-to-end spielbar zu zeigen (z. B. Schalter setzt ein Flag, das eine Tür
+öffnet und eine Beschreibung ändert) – ohne bestehende Tests zu berühren.
+
+## 10. Offene Detailfragen (in Implementierung entscheidbar)
+
+- `SAY`-Effekt: schlicht `io.write` oder gestylt (`StyledText`) – zunächst `write`.
+- Ob `ExitLock`/`DescriptionState`/`DialogueLine` als records in `model` oder
+  `model.state` liegen – im Plan festgelegt (`model`).

Semesterprojekt/docs/superpowers/specs/2026-05-31-quests-design.md

@@ -0,0 +1,163 @@
+# Spec: Quests & Quest-Log (Teilprojekt 3.2)
+
+Stand: 2026-05-31. Baut auf dem Quest-Fundament (3.1) auf: Flags, Conditions,
+Effects sind vorhanden. Liefert echte Quest-Objekte, eine Fortschritts-Engine und
+die Anzeige (Konsolen-Befehl + GUI-Quest-Box unter der Karte).
+
+## 1. Kontext & Ziel
+
+Das Fundament erlaubt gated progression über Flags. Jetzt: **strukturierte Quests**
+mit mehreren Stufen, deren Fortschritt **automatisch aus dem Weltzustand** erkannt
+wird (bestätigt: Ansatz A, condition-driven), plus sichtbares **Quest-Log**.
+
+## 2. Scope
+
+**In Scope:**
+- Quest-Datenmodell (`Quest`, `QuestStage`) + `quests.yaml`.
+- Runtime: `QuestLog` (Fortschritt), `QuestEngine` (Tick pro Zug, Auto-Advance,
+  Ansagen), `START_QUEST`-Effekt.
+- Anzeige: `QuestView`-Modell, `GameIO.setQuests/showQuests`, Konsolen-Befehl
+  `quests`, GUI-Quest-Box **unter der Karte**.
+- Loader: `QuestDto`/`QuestStageDto`, `QuestFactory`, `quests.yaml` (optional),
+  `World.quests`.
+- Demo-Quest in der echten Welt.
+
+**Out of Scope (3.3 / später):**
+- Win-Condition / mehrere Enden (3.3) – eine Quest kann aber per `onComplete`-Effekt
+  ein Flag setzen, das 3.3 nutzt.
+- Quest-Verzweigung, Fehlschlag-Zustände, Voraussetzungen (per `startQuest`-Effekt
+  ausdrückbar).
+
+## 3. Datenmodell (model)
+
+```java
+public record Quest(String id, String title, boolean autoStart,
+                    List<QuestStage> stages, List<Effect> onComplete) { /* List.copyOf */ }
+
+public record QuestStage(String objective, List<Condition> completion,
+                         List<Effect> onComplete) { /* List.copyOf */ }
+```
+`quests.yaml`:
+```yaml
+- id: restore_power
+  title: "Bring the Manor to Life"
+  autoStart: true
+  stages:
+    - objective: "Get the power running."
+      completion: [{ flag: power_on }]
+    - objective: "Earn the Old Man's brass key."
+      completion: [{ hasItem: key }]
+  onComplete:
+    - { setFlag: manor_secured }
+```
+
+## 4. Runtime (game)
+
+### 4.1 QuestLog (in GameContext)
+
+`QuestLog` (selbst-initialisiertes Feld in `GameContext`, wie `GameState` → kein
+Konstruktor-Eingriff). Hält nur Laufzeit-Fortschritt:
+- `Map<String, Integer> stageIndex` – aktuelle Stufe je *aktiver* Quest.
+- `Set<String> completed` – abgeschlossene Quest-IDs.
+- API: `start(id)`, `isActive(id)`, `isCompleted(id)`, `stageIndex(id)`,
+  `advance(id)`, `complete(id)`.
+
+### 4.2 START_QUEST-Effekt
+
+`Effect.Type.START_QUEST` (arg = Quest-ID). `Effects.apply` ruft
+`ctx.getQuestLog().start(arg)`. `EffectDto` bekommt Feld `startQuest`. Damit können
+Dialoge/Schalter/Reaktionen Quests starten.
+
+### 4.3 QuestEngine.tick(ctx)
+
+Pro Zug aus der `Game`-Schleife (neben `setHud`/`setMap`):
+1. Auto-Start: jede `autoStart`-Quest, die weder aktiv noch abgeschlossen ist, starten.
+2. Für jede **aktive** Quest die `completion` der **aktuellen** Stufe via
+   `Conditions.all` prüfen. Erfüllt →
+   - `onComplete`-Effekte der Stufe anwenden,
+   - Ansage (`io.print`, z. B. „✓ Objective complete: …"),
+   - `advance`; war es die letzte Stufe → Quest-`onComplete` anwenden, `complete`,
+     Ansage „Quest complete: …".
+3. **Kaskade**: Schleife wiederholen, solange sich etwas geändert hat (begrenzt durch
+   Gesamt-Stufenzahl), damit ein Zug mehrere Stufen auslösen kann.
+
+`tick` ist idempotent (abgeschlossene Stufen feuern nicht erneut). `QuestEngine.viewOf(ctx)`
+baut die `QuestView` aus `World.getQuests()` + `QuestLog`.
+
+## 5. Anzeige
+
+### 5.1 Modell (io.text)
+
+```java
+public record QuestEntry(String title, String objective) {}
+public record QuestView(List<QuestEntry> active, List<String> completed) {}
+```
+
+### 5.2 GameIO (additiv, wie die Karte)
+
+```java
+default void setQuests(QuestView view) { /* no-op */ }                 // Push pro Zug (GUI)
+default void showQuests(QuestView view) { print(QuestText.render(view)); } // on demand (Konsole)
+```
+- **Konsole**: nutzt beide Defaults. `setQuests` = no-op; `showQuests` druckt via
+  `QuestText.render` (io.text), ausgelöst durch `QuestsCommand`.
+- **GUI**: überschreibt `setQuests` (Quest-Box neu zeichnen) und `showQuests` (no-op,
+  Box ist immer sichtbar).
+- `TestIO`: Defaults; `showQuests` druckt in `outputs` → testbar.
+
+### 5.3 Konsolen-Befehl
+
+`QuestsCommand` (`quests`, `log`, `journal`) → `io.showQuests(QuestEngine.viewOf(ctx))`.
+Ausgabe: aktive Quests (Titel + aktuelles Ziel), darunter abgeschlossene (dim, mit ✓).
+
+### 5.4 GUI-Quest-Box
+
+Rechter Seitenbereich wird zu einem Panel: **Karte oben, Quest-Box unten**
+(`BorderLayout`: Map-Scroll CENTER, Quest-Scroll SOUTH mit fester/anteiliger Höhe).
+Die Quest-Box ist ein gestyltes, schreibgeschütztes Textfeld (`JTextPane`): aktive
+Quests fett (Titel) + Ziel; abgeschlossene dim mit ✓. Font folgt der Auto-Skalierung
+(`applyFonts`). `setQuests` aktualisiert sie pro Zug.
+
+## 6. Loading
+
+- `QuestDto(id, title, Boolean autoStart, List<QuestStageDto> stages, List<EffectDto> onComplete)`,
+  `QuestStageDto(objective, List<ConditionDto> completion, List<EffectDto> onComplete)`.
+- `QuestFactory.fromDto` baut `Quest` (Conditions/Effects via vorhandene
+  `toModelList`); keine Resolver-Phase nötig (Flags/Items lazy, Quest-IDs sind Strings).
+- `WorldLoader` liest `quests.yaml` **optional** (fehlt die Datei → leere Liste),
+  baut `Map<String, Quest>` und übergibt sie an `World`.
+- `World` bekommt Feld `quests` + **rückwärtskompatiblen 5-Arg-Konstruktor**
+  (delegiert mit leerer Quest-Map), damit bestehende `new World(...)`-Aufrufe in Tests
+  unverändert kompilieren.
+
+## 7. Fehlerbehandlung
+
+| Fall | Verhalten |
+|---|---|
+| `quests.yaml` fehlt | leere Quest-Map, Spiel läuft ohne Quests |
+| `START_QUEST` mit unbekannter Quest-ID | `QuestLog.start` legt Eintrag an; `viewOf` ignoriert IDs ohne Definition (Warnung geloggt) |
+| Quest ohne Stufen | gilt sofort als abgeschlossen beim ersten Tick |
+| Doppelte Quest-IDs | `WorldLoader.requireUniqueIds` erweitert um Quests |
+
+## 8. Testing
+
+- **QuestLog**: start/advance/complete, isActive/isCompleted.
+- **QuestEngine**: Auto-Start; Stufe rückt vor, wenn Condition gilt; Ansage; Quest
+  schließt nach letzter Stufe ab; Kaskade (eine Stufe löst die nächste); `viewOf`
+  liefert aktive + abgeschlossene korrekt.
+- **Effects**: `START_QUEST` startet Quest.
+- **EffectDto/QuestDto**: `toModel`/`fromDto`-Mapping.
+- **QuestsCommand**: über `TestIO` – Ausgabe enthält aktives Ziel.
+- **WorldLoader**: lädt `quests.yaml`; fehlende Datei → leer.
+- **GUI**: nicht unit-getestet; manueller Smoke (`exec:java@gui`).
+
+## 9. Demonstration
+
+`quests.yaml` mit `restore_power` (autoStart, 2 Stufen): Strom anschalten →
+Schlüssel vom alten Mann holen. Sichtbar im Konsolen-`quests`-Befehl und in der
+GUI-Box; Ansagen beim Erfüllen.
+
+## 10. Offene Detailfragen (in Implementierung)
+
+- Höhe/Anteil der GUI-Quest-Box (ca. 30 % der Seitenleiste, scrollbar).
+- Stil der Ansagen (zunächst `HEADING`).

Semesterprojekt/docs/superpowers/specs/2026-06-01-main-menu-save-load-design.md

@@ -0,0 +1,281 @@
+# Spec: Hauptmenü + Speichern/Laden (+ minimale Settings)
+
+Stand: 2026-06-01. Erstes Teilprojekt der Erweiterungsrunde nach Abschluss von
+Phasen 1–7 (Backlog #6 + #7, Teil von #6-Settings). Baut auf vorhandenem
+`GameIO`-Abstraktions-Modell, `GameContext` (World/Player/GameState/QuestLog) und
+dem `App.run(io)`-Einstieg auf, der von Konsole und GUI geteilt wird.
+
+## 1. Kontext & Ziel
+
+Das Spiel startet bisher direkt in die Spielschleife und endet per `quit` /
+Ending / EOF mit Prozess-Ende; es gibt keine Persistenz. Ziel:
+
+- **Hauptmenü oberhalb der Spielschleife** (Neues Spiel · Laden · Einstellungen ·
+  Beenden), identisch in Konsole und GUI über die geteilte `GameIO`-Abstraktion.
+- **Speichern/Laden** des veränderlichen Spielzustands als JSON, als **Delta über
+  die frisch aus YAML geladene Welt** (Welt-Definition bleibt datengetrieben; der
+  Spielstand enthält nur den mutierten Zustand).
+- **Ein aktiver Slot pro laufendem Spiel** (beim Neues-Spiel benannt). Manuelles
+  `save`, Autosave und Speichern-beim-Verlassen schreiben alle in diesen Slot.
+- **Minimale Settings**: Farb-Modus + Glyphen-Modus (ASCII/Unicode) umschalten,
+  persistiert.
+
+Bestätigte Entscheidungen (Brainstorming 2026-06-01):
+- Menü-Integration: **eine neue `GameIO`-Primitive `choose(...)`** (Konsole-Default
+  = nummeriertes Textmenü, `SwingIO` überschreibt mit Buttons). Menü-Logik
+  einmalig geschrieben, Konsolen-Parität gratis.
+- Save-Format: **JSON** (maschinengenerierter Zustand; klar getrennt vom
+  YAML-Content). Jackson ist bereits Abhängigkeit.
+- Slot-Modell: **ein aktiver Slot für alles** (save + autosave + quit-save
+  überschreiben denselben Slot; Menü-Laden listet alle benannten Spielstände).
+- `quit`/`exit`/`menu` in-game = **speichern + zurück ins Hauptmenü**; Prozess-Ende
+  nur über das Hauptmenü-„Beenden".
+- Neues Spiel: **Slot-Name abfragen, mit Default** (Enter akzeptiert Default).
+- Autosave: **Events (Quest abgeschlossen, quit-to-menu) + Intervall alle 10 Züge**.
+- Settings-Datei: **`saves/settings.json`**.
+
+## 2. Scope
+
+**In Scope:**
+- Shell-Schleife in `App.run(io)` (Menü-Schicht über dem Game-Loop).
+- `menu`-Paket: `MainMenu`, `SettingsMenu`, `MenuAction`.
+- `GameIO.choose(String title, List<String> options) → int` + Konsole-Default
+  (nummeriert, Re-Prompt) + `SwingIO`-Override (Buttons).
+- `GameSession` (Bündel des speicherbaren Zustands + Slot-Name + `turn`).
+- `SaveData`-DTO (JSON) + `SaveService` (save/list/load, atomar) + `SaveSlotInfo`.
+- In-Game-Befehle: `save`, `menu` (Aliase `quit`/`exit`). Kein `load`-Befehl.
+- Autosave: Quest-Completion-Hook, quit-to-menu, Intervall alle 10 Züge.
+- `Settings` + `SettingsStore` (`saves/settings.json`); `ConsoleIO`-Farb-/Glyphen-
+  Modus zur Laufzeit umschaltbar machen (Felder non-final + Setter).
+- Tests: Round-Trip, Overlay, Failure-Fälle, Menü-Logik, Konsolen-`choose`.
+
+**Out of Scope:**
+- Mehrere Slots pro Spiel / getrennter Autosave-Slot (bewusst „ein aktiver Slot").
+- Settings für Musik/Typewriter (Features existieren noch nicht).
+- GUI-Hintergrundbilder/„echte" Menü-Screens (Buttons genügen).
+- Pathfinding / `go to <raum>` (eigene spätere Runde, in Scope gehalten).
+- Migration alter Save-Versionen (nur Versions-Check + graceful refuse).
+
+## 3. Architektur: Shell-Schleife über dem Loop
+
+`App.run(io)` wird zur **Shell-Schleife**, die den Lebenszyklus besitzt. Der
+Prozess endet nur über Hauptmenü-„Beenden"; Spielende/`menu` kehren ins Menü
+zurück.
+
+```
+App.run(io):
+  Settings s = SettingsStore.load();      // → auf io anwenden (Farbe/Glyphen)
+  loop:
+    switch (MainMenu.show(io)) {
+      NEW_GAME -> { GameSession g = newSession(promptName(io)); play(io, g); }
+      LOAD     -> { SaveSlotInfo slot = pickSlot(io);          // oder „zurück"
+                    if (slot != null) {
+                      try   { play(io, SaveService.load(slot.slug())); }
+                      catch (SaveException e) { io.write(e.getUserMessage()); }
+                    } }
+      SETTINGS -> SettingsMenu.show(io, s);   // toggelt + persistiert + wendet an
+      QUIT     -> return;
+    }
+play(io, session):
+  GameContext ctx = new GameContext(session);   // s.u.
+  CommandRegistry registry = buildRegistry(...); // inkl. save/menu
+  Game game = new Game(ctx, registry, parser);
+  Banner + Welcome + erstes look;
+  game.run();        // kehrt zurück bei menu/quit/Ending/EOF
+```
+
+`newSession(name)` lädt die Welt frisch aus YAML (`WorldLoader`) und baut eine
+neue `GameSession`. `SaveService.load` lädt die Welt ebenso frisch und legt das
+Save-Delta darüber.
+
+## 4. `GameSession` (game)
+
+Bündelt den **speicherbaren** Zustand an einem Ort (heute über `GameContext` +
+privates `turn` in `Game` verstreut). `turn` wandert hierher, damit es gespeichert
+und in der Slot-Metadata gezeigt werden kann.
+
+```java
+public class GameSession {
+    private final World world;            // aus YAML geladen (statisch)
+    private final Player player;
+    private final GameState state;
+    private final QuestLog questLog;
+    private int turn;
+    private final String slotName;        // gebundener aktiver Slot
+    // getter; getTurn/setTurn/incrementTurn
+}
+```
+
+`GameContext` bekommt einen Konstruktor `GameContext(GameSession, GameIO)` (oder
+hält eine `GameSession`-Referenz statt der vier Einzelfelder). Bestehende
+Command-Signaturen (`execute(ctx, args)`) bleiben unverändert; `ctx.getWorld()`
+etc. delegieren an die Session. `Game` liest/erhöht `turn` über die Session statt
+über ein eigenes Feld.
+
+## 5. Menü-Schicht (menu)
+
+```java
+public enum MenuAction { NEW_GAME, LOAD, SETTINGS, QUIT }
+
+public final class MainMenu {           // frontend-agnostisch
+    public static MenuAction show(GameIO io) {
+        int i = io.choose("Haunted Manor", List.of(
+            "New Game", "Load Game", "Settings", "Quit"));
+        return MenuAction.values()[i];  // Reihenfolge = Indizes
+    }
+}
+```
+
+`SettingsMenu.show(GameIO, Settings)` toggelt Farbe/Glyphen über wiederholte
+`choose`-Aufrufe (mit „zurück"-Option), persistiert via `SettingsStore` und wendet
+live auf das `io` an. `pickSlot`/`promptName` nutzen `choose` bzw. `readLine`.
+
+### `GameIO.choose` (io)
+
+Neue Primitive auf `GameIO`:
+
+```java
+/** Zeigt eine Auswahl; gibt den 0-basierten Index der Wahl zurück. */
+default int choose(String title, List<String> options) {
+    print(/* Titel + nummerierte Liste 1..n als StyledText */);
+    while (true) {
+        String line = readLine();
+        Integer n = parseInRange(line, 1, options.size());
+        if (n != null) return n - 1;
+        write("Please enter a number between 1 and " + options.size() + ".");
+    }
+}
+```
+
+- **Konsole** nutzt den Default (nummeriert + Re-Prompt). **EOF/`null` → letzte
+  Option** (Konvention: Menüs ordnen die sichere/abbrechende Wahl — „Quit" bzw.
+  „zurück" — stets als letzte Option, sodass EOF nie in einen Zustand führt).
+- **`SwingIO` überschreibt** `choose`: rendert Buttons (ein Button je Option),
+  blockiert den Worker-Thread bis zum Klick — dasselbe Blocking-Handoff-Muster wie
+  das vorhandene `readLine` (EDT ↔ Worker). Kein Re-Prompt nötig (Buttons sind
+  immer gültig).
+
+## 6. In-Game-Befehle (command/impl)
+
+- **`SaveCommand`** (`save`): `SaveService.save(session)` → „Game saved." / bei
+  Fehler graceful Meldung, Loop läuft weiter.
+- **`MenuCommand`** (`menu`, Aliase `quit`, `exit`): `SaveService.save(session)`
+  dann `game.stop()` → zurück ins Hauptmenü. Ersetzt den bisherigen `QuitCommand`
+  (Bindung an `Game` wie gehabt via `bind(game)`).
+- **Kein `load`-Befehl** — Laden ausschließlich über das Hauptmenü.
+
+## 7. Autosave
+
+Ein aktiver Slot; alle Autosaves überschreiben ihn. Trigger:
+- **Quest abgeschlossen** — Hook in `QuestEngine` (nach `questLog.complete(id)`),
+  ruft eine `Autosaver`/`SaveService.save(session)`-Callback auf. Der Engine darf
+  dafür Zugriff auf einen Save-Callback bekommen (z.B. via `GameContext`), um die
+  Schichtung (game → loader) nicht zu verletzen.
+- **quit-to-menu** — `MenuCommand` speichert ohnehin.
+- **Intervall** — in `Game.run()` nach jedem erfolgreichen Befehl: wenn
+  `turn % 10 == 0`, `SaveService.save(session)`.
+
+Autosave-Fehler werden geloggt und schlucken (kein Loop-Abbruch); optional eine
+dezente Meldung.
+
+## 8. Save-Datenmodell: `SaveData` (loader/save)
+
+JSON-DTO, reines Delta über die YAML-Welt:
+
+```java
+public record SaveData(
+    int schemaVersion,                 // aktuell 1; Mismatch → refuse
+    String worldTitle,                 // Sanity-Check gegen geladene Welt
+    String slotName,
+    long savedAtEpochMillis,           // System.currentTimeMillis()
+    int turn,
+    String currentRoomId,
+    List<String> visitedRoomIds,       // geordnet
+    int gold,
+    List<String> inventoryItemIds,     // geordnet
+    List<String> flags,                // gesetzte World-Flags
+    Map<String,Integer> questStages,   // aktive Quest → Stage-Index
+    List<String> questCompleted,
+    Map<String,List<String>> roomItemIds,  // roomId → Item-Ids im Raum
+    Map<String,Boolean> switchStates   // SwitchableItem-Id → on/off
+) {}
+```
+
+`inventoryItemIds` + `roomItemIds` erfassen die Item-Platzierung vollständig;
+Items in keinem von beiden gelten als verbraucht/entfernt. Switch-Zustände decken
+Lampe/Generator/Tür ab.
+
+## 9. Persistenz: `SaveService` (loader/save)
+
+- Verzeichnis `saves/` (relativ zum Arbeitsverzeichnis, on-demand angelegt, in
+  `.gitignore`). Ein Slot = `saves/<slug>.json`, `slug` = sanitisierter Name
+  (`[a-z0-9_-]`, Rest → `_`).
+- **`save(GameSession)`**: `SaveData` aus Session bauen → Jackson → **atomar**
+  schreiben (Temp-Datei + `Files.move` ATOMIC_MOVE/REPLACE_EXISTING).
+- **`list() → List<SaveSlotInfo>`**: `saves/*.json` scannen, Header-Felder lesen
+  (`slotName`, `currentRoomId`, `turn`, `savedAtEpochMillis`) → für die
+  Laden-Liste. Beschädigte Dateien überspringen (geloggt).
+- **`load(slug) → GameSession`**: `SaveData` lesen → Welt frisch via `WorldLoader`
+  → `SaveApplier` legt das Delta darüber → `GameSession`.
+- **`SaveApplier`**: löst Ids gegen die frische Welt auf (Räume, Items). Setzt
+  Player-Raum/Gold/Inventar/Visited, World-Flags, QuestLog (Stages + completed),
+  verteilt Items in Räume/Inventar, setzt Switch-Zustände, `turn`.
+
+```java
+public record SaveSlotInfo(String slug, String slotName, String roomId,
+                           int turn, long savedAtEpochMillis) {}
+```
+
+## 10. Minimale Settings (game/io)
+
+```java
+public record Settings(ConsoleIO.ColorMode colorMode, ConsoleIO.GlyphMode glyphMode) {
+    public static Settings defaults() { return new Settings(ColorMode.AUTO, GlyphMode.UNICODE); }
+}
+```
+
+- `SettingsStore.load()/save(Settings)` ↔ `saves/settings.json` (Jackson). Fehlend/
+  beschädigt → `Settings.defaults()`.
+- **`ConsoleIO`**: `useColor`/`glyphs` von `final` auf veränderlich umstellen +
+  `setColorMode`/`setGlyphMode`, damit ein Settings-Toggle **live** wirkt (heute
+  konstruktor-fix). `App.main` lädt Settings vor dem Menü und konstruiert/füttert
+  `ConsoleIO` damit.
+- `SwingIO`: Glyphen/Farbe für die GUI ggf. No-Op bzw. minimal (GUI rendert eigene
+  Stile); Settings-Wirkung primär Konsole. (Bestätigen im Plan.)
+
+## 11. Fehlerbehandlung
+
+- **`SaveException`** (eigene, mit `getUserMessage()`): beschädigtes/unlesbares
+  JSON, Schreibrechte fehlen, Schema-Mismatch, unbekannte Ids → gefangen, geloggt,
+  benutzerfreundliche Meldung; **nie** Absturz. Load-Fehler → zurück ins Menü.
+- Konsolen-`choose`: ungültige Eingabe → Re-Prompt; `null`/EOF → sichere Vorgabe.
+- Leere Slot-Liste beim Laden → „No saved games." → zurück ins Menü.
+- GUI-Buttons können keine ungültige Wahl liefern.
+
+## 12. Tests
+
+- **`SaveServiceTest`** (Temp-Dir): Session bauen → `save` → `load` → volle
+  Zustandsgleichheit (Raum, Inventar, Item-Platzierung, Flags, Quest-Stages +
+  completed, Switch-Zustände, Gold, `turn`).
+- **`SaveDataTest`**: Jackson (De-)Serialisierung stabil; Overlay auf frische Welt
+  (verschobene Items, Quest mitten in Stage).
+- **Failure**: beschädigtes JSON, unbekannte Raum-Id, Schema-Mismatch → `SaveException`
+  mit sinnvoller Meldung; `list()` überspringt kaputte Dateien.
+- **`MainMenu`/`SettingsMenu`**: Fake-`GameIO` mit skriptbaren `choose`-Ergebnissen;
+  prüft Aktions-Mapping + Settings-Persistenz.
+- **Konsolen-`choose`-Default**: nummeriertes Rendering + Bad-Input-Re-Prompt über
+  gemocktes `readLine`.
+- **Konvention**: `SwingIO.choose`/GUI von Unit-Tests ausgenommen (manuelle
+  Verifikation), wie etabliert keine YAML-/GUI-abhängigen Domain-Tests.
+
+## 13. Architektur-Werte / Risiken
+
+- **Geteilter Loop bleibt zentral**: nur *eine* neue IO-Primitive; Menü-*Logik* ist
+  frontend-agnostisch, nur das Rendering divergiert (Default vs. Override).
+- **Datengetrieben**: Welt weiter aus YAML; Save ist reines Delta — Content-Updates
+  brechen alte Saves höchstens bei entfernten Ids (→ graceful refuse).
+- **Schichtung**: `SaveService` lebt unter `loader` (kennt `WorldLoader`); der
+  Quest-Autosave-Hook braucht einen Save-Callback im `GameContext`, um `game` nicht
+  direkt von `loader` abhängig zu machen — im Plan sauber verdrahten.
+- **GUI-Threading**: `SwingIO.choose` muss dasselbe EDT↔Worker-Blocking-Muster wie
+  `readLine` nutzen; sonst Deadlock-Gefahr.

Semesterprojekt/docs/superpowers/specs/2026-06-01-music-design.md

@@ -0,0 +1,226 @@
+# Spec: Hintergrundmusik (GUI)
+
+Stand: 2026-06-01. Letzte der geplanten Mechaniken (nach `use X on Y`,
+Pathfinding, Tutorial). Setzt Backlog #8 um: **Hintergrundmusik nur in der GUI**,
+pro Raum via YAML, externer `music/`-Ordner, gestreamtes OGG. Baut auf der
+`GameIO`-Abstraktion, dem Per-Zug-Push (`Game.publishHud`), dem datengetriebenen
+Loader und der minimalen Settings auf.
+
+## 1. Kontext & Ziel
+
+Bisher gibt es keinen Ton. Ziel: **Hintergrundmusik in der GUI**, pro Raum über
+ein optionales `music:`-Feld in `rooms.yaml`. Beim Raumwechsel sanfter Übergang;
+Lautstärke/Aus über die Settings. Konsole bleibt stumm (No-Op).
+
+Bestätigte Entscheidungen (Brainstorming 2026-06-01):
+- **Format/Lib**: **OGG Vorbis** via `vorbisspi` + `jorbis` (javax.sound-SPI),
+  gestreamt über eine `SourceDataLine`.
+- **Wechsel**: gleicher Track → unverändert weiter (kein Neustart); anderer Track →
+  **kurzes Fade-out, dann Fade-in** (~400 ms, sequenziell, eine Line);
+  Raum **ohne** `music` → **Fade to silence**.
+- **Settings**: eine zyklische **Music**-Stufe `OFF/LOW/MEDIUM/HIGH`, persistiert;
+  `OFF` deaktiviert Wiedergabe. Default **MEDIUM**.
+- **Dateien**: externer `music/`-Ordner (Arbeitsverzeichnis), **gitignored**, nicht
+  im JAR; fehlende Datei → still + Log, kein Absturz.
+- **Demo**: einige Räume mit Beispiel-`music:`-Feldern + Doku zum `music/`-Ordner.
+
+## 2. Scope
+
+**In Scope:**
+- `MusicLevel`-Enum (OFF/LOW/MEDIUM/HIGH + `gainDb()`).
+- `MusicController` (frontend-agnostisch, **testbar**): Track-/Level-Logik,
+  delegiert an ein `MusicBackend`.
+- `MusicBackend`-Interface (Roh-Operationen) + `OggMusicBackend` (Audio, **manuell**).
+- `GameIO.setMusic(String)` + `setMusicLevel(MusicLevel)` (Default No-Op);
+  `SwingIO`-Override mit `MusicController(new OggMusicBackend())`.
+- `Game.publishHud` ruft `setMusic(currentRoom.getMusic())`; nach `game.run()`
+  zurück ins Menü → `setMusic(null)`.
+- `Room.music` + `RoomDto.music` + `RoomFactory`; optionales `music:` in `rooms.yaml`.
+- `Settings.musicLevel` + `SettingsStore` (fehlt → MEDIUM); `SettingsMenu`-Zeile
+  „Music"; Anwendung via `io.setMusicLevel(...)` (Konsole No-Op).
+- `pom.xml`: `vorbisspi` + `jorbis`.
+- `music/` in `.gitignore` + kurze Doku.
+- Tests: `MusicController` (Fake-Backend), `MusicLevel`, Settings-Roundtrip,
+  Room-`music`-Laden.
+
+**Out of Scope:**
+- Konsolen-Audio (bleibt stumm).
+- True Cross-Fade (überlappende Lines) — nur sequenzielles Fade.
+- Sound-Effekte / mehrere gleichzeitige Tracks.
+- Mitliefern von Audiodateien im Repo.
+- Automatisierte Tests der echten OGG-Dekodierung/-Wiedergabe (manuell, GUI-only).
+
+## 3. `MusicLevel` (model oder io)
+
+```java
+public enum MusicLevel {
+    OFF, LOW, MEDIUM, HIGH;
+
+    /** MASTER_GAIN in dB; für OFF irrelevant (Wiedergabe deaktiviert). */
+    public float gainDb() {
+        return switch (this) {
+            case OFF -> Float.NEGATIVE_INFINITY;
+            case LOW -> -20f;
+            case MEDIUM -> -10f;
+            case HIGH -> 0f;
+        };
+    }
+    public boolean isOn() { return this != OFF; }
+
+    /** Nächste Stufe im Zyklus (für den Settings-Toggle). */
+    public MusicLevel next() {
+        return values()[(ordinal() + 1) % values().length];
+    }
+}
+```
+Platzierung: `io`-Paket (UI-nah, wie `ConsoleIO.ColorMode`). Settings referenziert es.
+
+## 4. `MusicBackend` + `MusicController` (io)
+
+```java
+/** Raw audio operations; the only part that touches sound hardware. */
+public interface MusicBackend {
+    void fadeTo(String track, float gainDb); // fade current out, start track (loop), fade in
+    void fadeOut();                          // fade current out + stop
+    void setGainDb(float gainDb);            // immediate volume change
+    void shutdown();                         // stop + release resources
+}
+```
+
+```java
+/** Frontend-agnostic music decision logic. Idempotent per track; honours level. */
+public final class MusicController {
+    private final MusicBackend backend;
+    private MusicLevel level = MusicLevel.MEDIUM;
+    private String current;   // currently selected track id, or null = silence
+
+    public MusicController(MusicBackend backend) { this.backend = backend; }
+
+    /** Called per turn with the current room's music field (may be null). */
+    public void room(String track) {
+        if (!level.isOn()) { return; }                 // OFF: stay silent, ignore
+        String t = (track == null || track.isBlank()) ? null : track;
+        if (java.util.Objects.equals(t, current)) { return; } // same → keep playing
+        current = t;
+        if (t == null) { backend.fadeOut(); } else { backend.fadeTo(t, level.gainDb()); }
+    }
+
+    /** Settings change. */
+    public void level(MusicLevel newLevel) {
+        this.level = newLevel;
+        if (!newLevel.isOn()) { backend.fadeOut(); current = null; }
+        else { backend.setGainDb(newLevel.gainDb()); }
+        // turning ON again starts on the next room() call (current was reset to null)
+    }
+
+    public void shutdown() { backend.shutdown(); }
+}
+```
+
+Hinweis: Bei Wechsel OFF→ON beginnt die Musik beim nächsten `room(...)` (pro Zug
+ohnehin aufgerufen), da `current` auf null gesetzt wurde. Das vermeidet, dass der
+Controller den aktuellen Raum kennen muss.
+
+## 5. `OggMusicBackend` (io, Audio, manuell)
+
+- Hält den aktuellen Wiedergabe-Thread (Daemon) + `SourceDataLine`.
+- `fadeTo(track, gainDb)`: laufenden Track per `MASTER_GAIN`-Rampe (~400 ms)
+  ausblenden, Thread stoppen (`volatile boolean stopping`), `music/<track>` öffnen
+  (`AudioSystem.getAudioInputStream` → vorbisspi liefert dekodiertes PCM), in einer
+  Schleife (Loop) in die Line schreiben, auf `gainDb` einblenden.
+- `fadeOut()`: Rampe runter, Thread stoppen, Line schließen.
+- `setGainDb(db)`: `MASTER_GAIN`-FloatControl sofort setzen.
+- `shutdown()`: stoppen + Ressourcen freigeben.
+- **Fehlende Datei / Decode-Fehler**: `log.warn`, still (kein Throw). `music/` fehlt
+  ganz → ebenso still.
+- Threading: Wiedergabe auf Daemon-Thread; Fades blockierend auf dem aufrufenden
+  Thread (Worker), kurz (~400 ms) — analog zur bestehenden `travelStep`-Pause.
+
+`music/<track>` = `Path.of("music", track)` relativ zum Arbeitsverzeichnis.
+
+## 6. `GameIO`-Anbindung
+
+```java
+/** Per-turn current-room track; null = silence. Console no-op; GUI plays. */
+default void setMusic(String track) { /* no-op */ }
+
+/** Apply the music volume/level. Console no-op; GUI sets it. */
+default void setMusicLevel(MusicLevel level) { /* no-op */ }
+```
+
+- `SwingIO`: Feld `MusicController music = new MusicController(new OggMusicBackend());`
+  `setMusic(t) → music.room(t)`; `setMusicLevel(l) → music.level(l)`.
+- `ConsoleIO`: erbt die No-Op-Defaults (kein Audio).
+- `Game.publishHud()`: zusätzlich `ctx.getIo().setMusic(ctx.getPlayer().getCurrentRoom().getMusic());`
+  (idempotent → Wechsel nur bei echtem Raumwechsel).
+- `App.play(...)`: nach `game.run()` → `io.setMusic(null);` (Musik beim Rückkehr ins
+  Menü ausblenden).
+
+## 7. Room-Feld + Loader
+
+- `Room`: optionales `private final String music;` (+ Getter). Konstruktor/Factory
+  erweitern; null = kein Track.
+- `RoomDto`: optionales `music`-Feld (nullable).
+- `RoomFactory.shellFromDto`: `music` durchreichen.
+- `rooms.yaml`: optionales `music: <datei>.ogg` pro Raum.
+- Demo: z.B. `kitchen: music: manor-theme.ogg`, `dungeon: music: dungeon-drone.ogg`
+  (Dateien liefert der Nutzer; fehlend → still).
+
+## 8. Settings-Erweiterung
+
+- `Settings` (record) bekommt `MusicLevel musicLevel`; `defaults()` → MEDIUM.
+- `SettingsStore`: Jackson serialisiert `MusicLevel` als Namen; alter Spielstand
+  ohne Feld → `null` → auf MEDIUM normalisieren (im `load()` oder via Defaults).
+- `SettingsMenu`: dritte Zeile „Music: <level>"; Auswahl zyklt `level.next()`;
+  nach jeder Änderung speichern + `applySettings`.
+- **Refactor**: `SettingsMenu.apply/show` nehmen statt `ConsoleIO` das `GameIO`
+  entgegen. `apply(Settings, GameIO io)`:
+  `io.setMusicLevel(s.musicLevel());` **und** `if (io instanceof ConsoleIO c) {
+  c.setColorMode(...); c.setGlyphMode(...); }`. Aufrufer (App, `MenuTest`) anpassen.
+- `App.run`: beim Start `SettingsMenu.apply(settings, io)` (setzt auch Music-Level).
+
+## 9. Abhängigkeit + Dateien
+
+- `pom.xml` (`<dependencies>`):
+  - `com.googlecode.soundlibs:vorbisspi:1.0.3.3`
+  - `com.googlecode.soundlibs:jorbis:0.0.17.4`
+  (vorbisspi zieht `tritonus-share` transitiv; bei Bedarf explizit ergänzen.)
+- `.gitignore`: `music/`.
+- Kurze Doku (z.B. in `docs/` oder README-Abschnitt): „Lege `.ogg`-Dateien in
+  `music/` ab; Räume referenzieren sie über `music:` in `rooms.yaml`. Ohne Dateien
+  bleibt die GUI stumm."
+
+## 10. Tests
+
+- **`MusicControllerTest`** (Fake-`MusicBackend`, das Aufrufe protokolliert):
+  - `room("a")` → `fadeTo("a", MEDIUM.gainDb())`; erneut `room("a")` → kein Aufruf.
+  - `room("b")` → `fadeTo("b", ...)`; `room(null)` → `fadeOut()`.
+  - `level(OFF)` → `fadeOut()` + danach ignoriert `room("a")` (still).
+  - `level(HIGH)` (von MEDIUM) → `setGainDb(HIGH)`; danach `room("a")` spielt.
+  - leerer/blank Track == null.
+- **`MusicLevelTest`**: `gainDb()`-Mapping; `next()`-Zyklus; `isOn()`.
+- **`SettingsStoreTest`** (erweitern): musicLevel round-trip; fehlendes Feld → MEDIUM.
+- **`SettingsMenu`/`MenuTest`** (anpassen an `GameIO`-Signatur): Music-Zeile zyklt
+  und persistiert.
+- **Room-`music`-Laden**: Loader-/Factory-Test, dass `music:` auf `Room.getMusic()`
+  landet (und Abwesenheit → null).
+- `OggMusicBackend` + echte Wiedergabe: **manuell** (eine `.ogg` + Audio-Hardware),
+  keine Unit-Tests (Konvention: kein GUI-/Hardware-abhängiger Test).
+
+## 11. Architektur-Werte / Risiken
+
+- **Geteilter Loop bleibt**: nur zwei neue `GameIO`-No-Op-Defaults; Musik-Logik im
+  testbaren `MusicController`, Audio isoliert im `OggMusicBackend`. Konsole stumm.
+- **Testbarkeit**: die wertvolle Entscheidungslogik (Idempotenz, null→Stille, OFF)
+  ist gegen ein Fake-Backend voll getestet; Hardware-Audio bleibt manuell.
+- **Datengetrieben**: `music:` pro Raum in YAML; keine Hardcodierung.
+- **Externe Dateien**: `music/` gitignored, nicht im JAR — Repo bleibt klein; fehlende
+  Dateien sind ein No-Op (graceful), kein Spielabbruch.
+- **Risiko Lib**: vorbisspi/jorbis sind alt, funktionieren aber mit `javax.sound`.
+  Falls eine Datei nicht dekodierbar ist → graceful silence. Lizenz: LGPL/BSD-artig,
+  für eine Erweiterung erlaubt (Backlog: Bibliotheken erlaubt).
+- **Threading**: Fades blockieren kurz den Worker-Thread (~400 ms, wie `travelStep`);
+  Wiedergabe auf Daemon-Thread. Beim Spielende `setMusic(null)` → Stille im Menü.
+- **Settings-Refactor**: `SettingsMenu` von `ConsoleIO` auf `GameIO` umstellen ist die
+  einzige Änderung an bestehendem, bereits reviewtem Code — minimal und nötig, damit
+  der Music-Level beide Frontends erreicht (Konsole No-Op).

Semesterprojekt/docs/superpowers/specs/2026-06-01-pathfinding-go-to-design.md

@@ -0,0 +1,194 @@
+# Spec: Pathfinding `go to <room>`
+
+Stand: 2026-06-01. Zweite der verbleibenden Mechaniken (nach `use X on Y`).
+Setzt den in `enhancement-ideas.md` als Algorithmus-Showcase notierten Punkt um:
+`go to <raum>` per BFS. Baut auf `GoCommand`, `MapLayout` (BFS-Gitter + Fog of
+War), `Light`, `Conditions`/`ExitLock` und der `GameIO`-Abstraktion auf.
+
+## 1. Kontext & Ziel
+
+Bewegung erfolgt bisher Schritt für Schritt per `go <richtung>`. Ziel: **`go to
+<raum>`** läuft automatisch per **BFS** über bereits **besuchte** Räume zum Ziel,
+unter Beachtung derselben Gates wie ein manueller Zug (verschlossene Exits, Licht).
+In der **GUI** soll die Minikarte die Bewegung **Raum für Raum animiert** zeigen;
+in der Konsole läuft die Reise still mit einer knappen Zusammenfassung.
+
+Bestätigte Entscheidungen (Brainstorming 2026-06-01):
+- **Erreichbarkeit**: nur **besuchte** Räume sind Wegpunkte/Ziele (Fog of War bleibt
+  erhalten; kein Teleport in Unentdecktes).
+- **Darstellung**: Konsole still + Zusammenfassung + Ziel-`look`; GUI animiert die
+  Minikarte (Map-Push pro Schritt).
+- **Zusammenfassung**: nennt **Start**, **Ziel** und **höchstens einen** mittleren
+  Wegpunkt (Mittelknoten). Bei 9 Knoten: 1., 5., 9.
+- **Schrittverzögerung GUI**: ~**300 ms** pro Raum.
+- **Trie-Autocomplete**: **zurückgestellt** (eigenes späteres Teilprojekt).
+
+## 2. Scope
+
+**In Scope:**
+- `GoCommand`-Erweiterung: Argument ist Richtung → bestehender Einzelzug; sonst →
+  Raum-Ziel-Pathfinding. Keine neue Verb-Registrierung (Parser entfernt `to`).
+- `Pathfinder` (`game`): BFS über besuchte Räume mit Passierbarkeits-Prädikat
+  (Exit-Lock + Licht), liefert den Pfad oder leer.
+- Auto-Walk: Schritt für Schritt `setCurrentRoom` + `GameIO.travelStep(MapView)`;
+  danach Zusammenfassung + `LookCommand`.
+- Neue `GameIO.travelStep(MapView)`-Default-Methode (No-Op Konsole) + `SwingIO`-
+  Override (Map-Push + ~300 ms Sleep).
+- Ziel-Auflösung nur unter besuchten Räumen (id, dann name; case-insensitive).
+- Zusammenfassung mit Start/Mitte/Ziel-Logik.
+- Tests: `Pathfinder` (BFS, Locks, Licht, besucht-nur, unerreichbar), `GoCommand`
+  (Raum-Ziel, Meldungen, Richtung weiterhin).
+
+**Out of Scope:**
+- Trie-/Tab-Autocomplete (eigenes Teilprojekt).
+- Routing durch **unbesuchte** Räume.
+- Pfad-Neuplanung mitten im Lauf (Zustand ändert sich während eines Zuges nicht).
+- Gewichtete Kanten / Kosten (alle Kanten gleich; BFS = kürzeste Raumzahl).
+- Mehr-Wort-Item-/Richtungs-Sonderfälle über die beschriebene Auflösung hinaus.
+
+## 3. Routing in `GoCommand`
+
+Der Parser entfernt `to`/`with`/… als Filler, daher liefern `go to library` und
+`go library` beide `args=[library]`. `execute` verzweigt:
+
+```java
+if (args.isEmpty()) { io.write("Go where? Try 'go north' or 'go to <room>'."); return; }
+String first = args.getFirst();
+try {
+    Direction dir = Direction.fromString(first);
+    moveDirection(ctx, dir);   // bestehender Einzelzug (unverändert ausgelagert)
+    return;
+} catch (IllegalArgumentException notADirection) {
+    goToRoom(ctx, args);       // neuer Raum-Ziel-Pfad
+}
+```
+
+`moveDirection` = der bisherige Rumpf (Exit prüfen, Lock, Licht, setCurrentRoom,
+look). `move`/`walk`-Aliase erben beides.
+
+## 4. Ziel-Auflösung (`goToRoom`)
+
+- Zielname = `String.join(" ", args).toLowerCase()` (`go to old kitchen` → "old kitchen").
+- Suche **nur unter besuchten Räumen** (`player.getVisitedRoomIds()` → `world.getRooms().get(id)`):
+  Treffer, wenn `id.equals(name)` **oder** `room.getName().toLowerCase().equals(name)`.
+- Kein Treffer → `"You don't know any direction or place called '<name>'."` (verrät keine
+  unentdeckten Räume).
+- Ziel == aktueller Raum → `"You're already in the <Name>."`
+- sonst → `Pathfinder.findPath`; leer → `"You can't find a way there right now."`;
+  sonst Auto-Walk (§6).
+
+## 5. `Pathfinder` (game/Pathfinder.java)
+
+```java
+/** Shortest path (BFS) over visited rooms to target, honouring locks + light.
+ *  Returns the steps AFTER the current room, ending at target; empty if none. */
+public static List<Room> findPath(GameContext ctx, Room target) { ... }
+```
+
+- BFS ab `player.getCurrentRoom()`; Queue + `Map<Room,Room> cameFrom`.
+- Kante `from --dir--> to` passierbar gdw.:
+  1. `to` ist in `player.getVisitedRoomIds()`,
+  2. Lock: `from.getExitLocks().get(dir)` ist null **oder** `Conditions.all(lock.requires(), ctx)`,
+  3. Licht: `Light.isLit(ctx, to)`.
+- Bei Erreichen von `target` Pfad via `cameFrom` rekonstruieren (ohne Startraum,
+  inkl. `target`). Unerreichbar → `List.of()`.
+- Rein über die Domäne + `ctx`; keine IO. Testbar wie `MapLayoutTest`/`QuestEngineTest`.
+
+Hinweis: Da nur besuchte Räume Kanten liefern und Start immer „besucht" ist, ist
+die Suche auf die bekannte Karte beschränkt. `target == current` behandelt
+`goToRoom` vorab (Pathfinder müsste sonst leeren Pfad liefern).
+
+## 6. Auto-Walk + animierte Minikarte
+
+```java
+List<Room> path = Pathfinder.findPath(ctx, target);
+if (path.isEmpty()) { io.write("You can't find a way there right now."); return; }
+for (Room step : path) {
+    ctx.getPlayer().setCurrentRoom(step);
+    ctx.getIo().travelStep(MapLayout.compute(
+            ctx.getWorld(), ctx.getPlayer().getVisitedRoomIds(), step));
+}
+ctx.getIo().write(summary(routeIncludingStart));   // §7
+new LookCommand().execute(ctx, List.of());
+```
+
+- `setCurrentRoom` markiert Räume als besucht (bereits besucht → idempotent).
+- `go to` ist **ein** Zug (ein Command) — der Game-Loop erhöht `turn` einmal.
+
+### `GameIO.travelStep(MapView)`
+
+```java
+/** Per-step travel frame during auto-walk. Console: no-op (silent). */
+default void travelStep(MapView view) {
+    // no animation in text mode
+}
+```
+
+`SwingIO`-Override:
+```java
+@Override
+public void travelStep(MapView view) {
+    setMap(view);                 // Map-Panel neu zeichnen (invokeLater)
+    try { Thread.sleep(TRAVEL_STEP_MS); }   // ~300 ms, läuft auf dem Worker-Thread
+    catch (InterruptedException e) { Thread.currentThread().interrupt(); }
+}
+```
+`TRAVEL_STEP_MS = 300`. Konsole bleibt still und ohne Pause (Default No-Op).
+Der reguläre `publishHud` am Zugende setzt den finalen Map-/HUD-Stand.
+
+## 7. Zusammenfassungs-Zeile (§ Wegpunkte)
+
+Über die volle Route `route = [current] + path` (n = `route.size()`, Index 0..n-1):
+- **Start** = `route[0]`, **Ziel** = `route[n-1]` immer genannt.
+- **Mitte** = `route[n/2]` nur wenn `n >= 3` und der Index weder 0 noch n-1 ist
+  (also höchstens **ein** Zwischenpunkt). Bei n=9 → Index 4 (der 5. Knoten).
+- Rendering:
+  - n == 2: `"You make your way from the <Start> to the <Ziel>."`
+  - n >= 3: `"You make your way from the <Start>, through the <Mitte>, to the <Ziel>."`
+
+(Artikel „the" bewusst einfach gehalten; reine Flavor-Zeile, leicht anpassbar.)
+
+## 8. Fehler-/Randfälle (Meldungen)
+
+| Fall | Meldung |
+|---|---|
+| `go` ohne Argument | "Go where? Try 'go north' or 'go to <room>'." |
+| Richtung ohne Exit | (bestehend) "You can't go <dir> from here." |
+| Richtung gesperrt / dunkel | (bestehend) Lock-Text / Dunkelheits-Hinweis |
+| Zielname unbekannt (unter besuchten) | "You don't know any direction or place called '<name>'." |
+| Ziel == aktueller Raum | "You're already in the <Name>." |
+| Ziel besucht, aber kein passierbarer Pfad | "You can't find a way there right now." |
+
+## 9. Tests
+
+- **`PathfinderTest`** (Welt inline, wie `MapLayoutTest`):
+  - kürzester Pfad über besuchte Räume (Länge + Knoten korrekt).
+  - unbesuchter Zwischenraum wird **nicht** als Wegpunkt genutzt (kein Pfad bzw.
+    Umweg nur über Besuchtes).
+  - kein Pfad durch einen Exit mit nicht erfüllter `ExitLock`-Bedingung; Pfad
+    erscheint, wenn die Flag gesetzt ist.
+  - kein Pfad in einen dunklen Raum ohne Licht; mit getragenem Licht erreichbar.
+  - unerreichbares Ziel → leere Liste.
+- **`GoCommand`-Tests** (Raum-Ziel):
+  - `go to <name>` läuft zum Ziel (currentRoom aktualisiert, Ziel-`look` erfolgt).
+  - Auflösung per id **und** per name (case-insensitive).
+  - unbekannter Name / Ziel==aktuell / kein Pfad → jeweilige Meldung.
+  - `go north` (Richtung) funktioniert weiterhin (Regressionsschutz).
+- **`travelStep`**: Default ist No-Op (Tests nutzen `TestIO`; keine Sleeps, keine
+  GUI). GUI-Animation wird manuell verifiziert (Konvention: keine GUI-Unit-Tests).
+
+## 10. Architektur-Werte / Risiken
+
+- **Gemeinsamer Loop bleibt**: nur eine neue `GameIO`-Default-Methode; Pacing/
+  Animation lebt im Renderer (`SwingIO`), Konsole No-Op. Keine Divergenz der Logik.
+- **Konsistenz mit manuellem Zug**: Pathfinder nutzt dieselben Gates (Lock, Licht)
+  wie `GoCommand` — kein Auto-Walk durch etwas, das man manuell nicht passieren darf.
+- **Fog of War**: nur besuchte Räume → kein Informationsleck über Unentdecktes.
+- **Algorithmus-Showcase**: klassisches BFS (Queue + `cameFrom`) mit
+  Standard-Collections (entspricht der Projekt-Entscheidung „keine eigenen
+  `uebung`-Strukturen"). `MapLayout` macht bereits BFS — `Pathfinder` ist die
+  fokussierte Wegfindungs-Variante (eigene Verantwortlichkeit, eigene Tests).
+- **GUI-Threading**: `travelStep` schläft auf dem Worker-Thread (wie `readLine`
+  blockiert), `setMap` zeichnet via EDT — kein Deadlock; EDT bleibt responsiv.
+- Risiko: lange Pfade × 300 ms könnten sich zäh anfühlen; bewusst akzeptiert (kurze
+  Karte). Später ggf. Settings-gesteuert.

Semesterprojekt/docs/superpowers/specs/2026-06-01-tutorial-design.md

@@ -0,0 +1,254 @@
+# Spec: Interaktives Start-Tutorial
+
+Stand: 2026-06-01. Dritte der verbleibenden Mechaniken (nach `use X on Y` und
+Pathfinding). Setzt das vom Nutzer gewünschte **interaktive Tutorial beim
+Spielstart, abbrechbar per `skip`** um. Baut auf dem geteilten Game-Loop,
+`CommandRegistry`/`CommandParser`, `GameIO` und dem datengetriebenen Loader auf.
+
+## 1. Kontext & Ziel
+
+Neue Spieler kennen die Befehle nicht. Ziel: ein **interaktiver Walkthrough** zu
+Beginn eines **Neuen Spiels**, der den Spieler im **echten Startraum** Schritt für
+Schritt die Kernbefehle ausführen lässt (er wartet, bis der jeweilige Befehl kam),
+mit Bestätigung/Hinweisen, und am Ende die übrigen Befehle als Tipps nennt.
+Jederzeit per `skip` überspringbar. Geladene Spielstände zeigen kein Tutorial.
+
+Bestätigte Entscheidungen (Brainstorming 2026-06-01):
+- **Stil**: interaktiv (wait-for-it) im echten Spiel, nicht in einer Sandbox.
+- **Kern-Bogen** (interaktiv, in Reihenfolge): `look` → `examine` → `take` →
+  `inventory` → `use` → `go` (Richtung) → `go to` (Pathfinding). Danach
+  **Abschluss-Tipps** für den Rest (read, drop, talk/give, use X on Y, map,
+  quests, save, menu).
+- **Abschluss-Erkennung verb-basiert** (alias-fähig): jede gültige Nutzung des
+  erwarteten Verbs zählt; optional `minArgs`.
+- **Datengetrieben**: `tutorial.yaml`; Logik (Verb-/Richtungs-Matching) im Code.
+- **Häufigkeit**: bei jedem Neuen Spiel; `skip` überspringt; keine Persistenz.
+- **Falscher (aber gültiger) Befehl**: wird **ausgeführt** (echtes Spiel) + sanfter
+  Hinweis, Schritt rückt **nicht** vor.
+- **Platzierung**: **nach** Banner + Willkommen + erstem Raum-`look`.
+
+## 2. Scope
+
+**In Scope:**
+- `TutorialGuide` (game), in den Game-Loop eingehängt (optional; null = kein Tutorial).
+- `Tutorial`/`TutorialStep` (model) + `TutorialDto`/`TutorialStepDto` (loader/dto)
+  + `TutorialLoader` (optionales `/world/tutorial.yaml`, eigener Loader — nicht in `World`).
+- `Game`: optionaler Guide (`setTutorialGuide`) + `begin`/`onCommand`/`skip`-Anbindung.
+- `App.play(..., withTutorial)`: Guide nur beim Neuen Spiel bauen.
+- `tutorial.yaml`: Intro, 7 Kern-Schritte, Abschluss-Tipps.
+- Tests: Guide-Logik, Loader, Game-Integration.
+
+**Out of Scope:**
+- Persistenz „Tutorial gesehen" / Settings-Toggle (eigene spätere Option).
+- Sandbox-Welt / Zurücksetzen von Tutorial-Aktionen (es ist das echte Spiel).
+- Erzwungenes `use X on Y` / `talk` etc. (nur in Abschluss-Tipps genannt).
+- GUI-Sonderdarstellung (Tutorial nutzt die normale styled Ausgabe; `skip` per Eingabe).
+
+## 3. Datenmodell (model)
+
+```java
+public record TutorialStep(
+        String instruction,   // an den Spieler: was tun
+        String expect,        // Verb-Name ("look"/"examine"/...) ODER "go_direction" / "go_to_room"
+        int minArgs,          // Mindest-Argumentzahl (z.B. 1 für take/examine/use); 0 default
+        String confirm,       // Bestätigung bei Erfolg
+        String hint           // sanfter Hinweis bei gültigem-aber-falschem Befehl
+) {}
+
+public record Tutorial(String intro, List<TutorialStep> steps, String closingTips) {
+    public Tutorial {
+        steps = steps == null ? List.of() : List.copyOf(steps);
+    }
+    public boolean isEmpty() { return steps.isEmpty(); }
+    public static Tutorial none() { return new Tutorial(null, List.of(), null); }
+}
+```
+
+`tutorial.yaml` (ein Mapping, optional):
+```yaml
+intro: |
+  Welcome. Let me show you the ropes — type the commands as I describe them.
+  (Type 'skip' at any time to jump straight into the game.)
+steps:
+  - instruction: "Look around the room: type 'look'."
+    expect: look
+    confirm: "Good — 'look' (or 'l') always re-describes where you are."
+    hint: "When you're ready, just type: look"
+  - instruction: "Examine something you see: 'examine <thing>' (or 'x <thing>')."
+    expect: examine
+    minArgs: 1
+    confirm: "That's how you inspect items, exits and people up close."
+    hint: "Try examining something, e.g.: examine lamp"
+  - instruction: "Pick something up: 'take <item>'."
+    expect: take
+    minArgs: 1
+    confirm: "Taken. Items you carry go into your inventory."
+    hint: "Pick something up, e.g.: take lamp"
+  - instruction: "Check what you're carrying: 'inventory' (or 'i')."
+    expect: inventory
+    confirm: "That's your inventory."
+    hint: "Type: inventory"
+  - instruction: "Use an item: 'use <item>' (e.g. light the lamp)."
+    expect: use
+    minArgs: 1
+    confirm: "Some items toggle, read or react when used."
+    hint: "Use something, e.g.: use lamp"
+  - instruction: "Move to another room: 'go <direction>' (try 'go north')."
+    expect: go_direction
+    confirm: "You can move north/south/east/west between connected rooms."
+    hint: "Head somewhere, e.g.: go north"
+  - instruction: "Travel back to a room you've seen: 'go to <room>'."
+    expect: go_to_room
+    confirm: "Nice — 'go to <room>' auto-walks to any room you've already visited."
+    hint: "Try: go to <a room you've already visited>"
+closingTips: |
+  That's the core. A few more you'll want:
+  read · drop · talk to <npc> · give <item> to <npc> ·
+  use <item> on <item> (combine things) · map · quests · save · menu.
+  Type 'help' anytime. Good luck.
+```
+
+## 4. `TutorialLoader` (loader)
+
+- `loader/dto/TutorialDto` (`intro`, `List<TutorialStepDto> steps`, `closingTips`),
+  `loader/dto/TutorialStepDto` (`instruction`, `expect`, `Integer minArgs`, `confirm`, `hint`).
+- `TutorialLoader.load(basePath)` → `Tutorial`: liest `basePath + "/tutorial.yaml"`
+  optional (fehlt → `Tutorial.none()`), mappt DTO→Modell (`minArgs` null → 0).
+  Nutzt einen eigenen Jackson-`YAMLFactory`-Mapper wie `WorldLoader`. Default-Base
+  `/world` (überschreibbar für Tests). Parse-Fehler → `WorldLoadException`.
+- Bewusst **getrennt von `World`**: Tutorial ist Onboarding, kein Welt-Inhalt.
+
+## 5. `TutorialGuide` (game)
+
+Zustandsbehaftet (ein laufendes Tutorial), hält die Schritte + den Index + die
+`CommandRegistry` (für alias-fähiges Verb-Matching).
+
+```java
+public final class TutorialGuide {
+    private final Tutorial tutorial;
+    private final CommandRegistry registry;
+    private int index = 0;
+    private boolean active;
+    private Room roomAtStepStart;   // zum Erkennen echter Bewegung
+
+    public TutorialGuide(Tutorial tutorial, CommandRegistry registry) {
+        this.tutorial = tutorial; this.registry = registry;
+        this.active = !tutorial.isEmpty();
+    }
+    public boolean isActive() { return active; }
+
+    /** Druckt Intro + erste Anweisung (am Loop-Start, nach dem ersten look). */
+    public void begin(GameContext ctx) { if (active) { print intro; enterStep(ctx); } }
+
+    /** Nach jedem ausgeführten Befehl: prüft den aktuellen Schritt. */
+    public void onCommand(GameContext ctx, ParsedCommand parsed) {
+        if (!active) return;
+        TutorialStep step = tutorial.steps().get(index);
+        if (satisfies(step, ctx, parsed)) {
+            ctx.getIo().write(step.confirm());
+            index++;
+            if (index >= tutorial.steps().size()) { ctx.getIo().print(closingTips); active = false; }
+            else enterStep(ctx);
+        } else {
+            ctx.getIo().write(step.hint());   // gültiger-aber-falscher Befehl → Nudge
+        }
+    }
+
+    /** 'skip' während des Tutorials: Abbruch ohne Zug. */
+    public void skip(GameContext ctx) { if (active) { ctx.getIo().write("Tutorial skipped."); active = false; } }
+
+    /** Merkt den aktuellen Raum (für Bewegungs-Erkennung) und druckt die Anweisung. */
+    private void enterStep(GameContext ctx) {
+        roomAtStepStart = ctx.getPlayer().getCurrentRoom();
+        ctx.getIo().write(tutorial.steps().get(index).instruction());
+    }
+}
+```
+
+**`satisfies(step, ctx, parsed)`**:
+- `expect == "go_direction"` → `sameCommand(parsed.verb(), "go")` **und** `args` nicht leer
+  **und** erstes Arg ist eine Richtung (`Direction.fromString` wirft nicht) **und**
+  der Spieler ist **tatsächlich umgezogen** (`ctx.getPlayer().getCurrentRoom() != roomAtStepStart`).
+- `expect == "go_to_room"` → `sameCommand(parsed.verb(), "go")` **und** `args` nicht leer
+  **und** erstes Arg ist **keine** Richtung **und** der Spieler ist tatsächlich umgezogen.
+- sonst (Verb-Name) → `sameCommand(parsed.verb(), step.expect())` **und**
+  `args.size() >= step.minArgs()`.
+- `sameCommand(a, b)` = `registry.find(a)` und `registry.find(b)` beide präsent und
+  **dieselbe** Command-Instanz (alias-fähig: `l`==`look`, `x`==`examine`, `get`==`take`,
+  `i`==`inventory`).
+
+Die Bewegungs-Bedingung verhindert, dass ein **blockierter** Zug (z.B. `go south`
+in den dunklen Dungeon ohne Licht → kein Raumwechsel) den Schritt vorrückt — wichtig,
+damit für `go_to_room` danach wirklich zwei Räume besucht sind.
+
+Hinweis: `onCommand` wird nur nach einem **erfolgreich aufgelösten** Befehl gerufen;
+unbekannte Eingaben behandelt der Loop bereits („I don't understand …").
+
+## 6. Game-Loop-Anbindung (game/Game.java)
+
+- Neues optionales Feld `private TutorialGuide tutorialGuide;` + `setTutorialGuide(...)`
+  (Zwei-Phasen-Wiring wie `QuitCommand`/`MenuCommand`).
+- In `run()` **vor** der `while`-Schleife (nach dem initialen `publishHud`/`maybeEnd`):
+  `if (tutorialGuide != null) tutorialGuide.begin(ctx);`
+- In der Schleife, **vor** dem Dispatch: wenn `tutorialGuide != null &&
+  tutorialGuide.isActive() && parsed.verb().equals("skip")` → `tutorialGuide.skip(ctx);
+  publishHud(); continue;` (kein `turn++`).
+- **Nach** `cmd.get().execute(...); turn++;`:
+  `if (tutorialGuide != null) tutorialGuide.onCommand(ctx, parsed);`
+
+Der Guide ist in normalem/geladenem Spiel `null` → kein Overhead, kein Verhalten.
+
+## 7. App-Anbindung (App.java)
+
+- `App.run` lädt das Tutorial einmal beim Start: `Tutorial tutorial =
+  new TutorialLoader().load();` (wie Settings/SaveService).
+- `play(io, saves, session, boolean withTutorial)`: nach dem Registry-Aufbau, wenn
+  `withTutorial && !tutorial.isEmpty()` → `game.setTutorialGuide(new TutorialGuide(
+  tutorial, registry))`.
+- `case NEW_GAME -> play(io, saves, newSession(io), true);`
+  `LOAD -> play(io, saves, saves.load(slot.slug()), false);`
+- Reihenfolge in `play`: Banner → Willkommen → erstes `look` → `game.run()` (darin
+  `guide.begin`). Damit erscheint das Tutorial **nach** dem ersten Raumbild.
+
+## 8. Flow & Meldungen
+
+- Neues Spiel → Name → Banner/Willkommen → Raum-`look` → Intro + 1. Anweisung.
+- Spieler tippt Befehle (echte Ausführung); passender Befehl → `confirm` + nächste
+  Anweisung; falscher (gültiger) → `hint`. Nach dem letzten Schritt → `closingTips`,
+  Guide inaktiv, normales Spiel läuft weiter (Spieler steht, wo das Tutorial endete).
+- `skip` jederzeit → „Tutorial skipped." → normales Spiel.
+- Während des Tutorials laufen HUD/Karte/Quests/Autosave normal (es ist der echte Loop).
+
+## 9. Tests
+
+- **`TutorialGuideTest`** (Fake-`CommandRegistry` mit echten Command-Instanzen oder
+  reale Registry; `TestIO`):
+  - Alias-Match: `l` erfüllt `look`-Schritt; `x` erfüllt `examine`.
+  - `minArgs`: `take` ohne Arg erfüllt **nicht** (minArgs 1), `take lamp` schon.
+  - `go_direction` (Arg = Richtung) vs `go_to_room` (Arg = keine Richtung).
+  - Falscher gültiger Befehl → `hint`, kein Vorrücken.
+  - Vorrücken + `confirm`; nach letztem Schritt → `closingTips` + `isActive()==false`.
+  - `skip` → inaktiv, „Tutorial skipped.".
+- **`TutorialLoaderTest`**: lädt Fixture-`tutorial.yaml` → Intro/Steps/ClosingTips;
+  fehlende Datei → `Tutorial.none()` (`isEmpty()`).
+- **`GameTutorialTest`** (Integration): kleine Welt + reale Registry + `TestIO` mit
+  skript-Eingaben durch `game.run()`; prüft, dass `begin` druckt, Schritte bei
+  passenden Befehlen vorrücken, und `skip` beendet. (App-/GUI-Wiring manuell.)
+- Konvention: keine GUI-/YAML-abhängigen Domain-Tests außer dem Loader-Fixture.
+
+## 10. Architektur-Werte / Risiken
+
+- **Geteilter Loop bleibt zentral**: der Guide hängt sich minimal in `Game` ein;
+  Konsole und GUI verhalten sich identisch (normale styled Ausgabe, `skip` per Eingabe).
+- **Datengetrieben**: Schritte/Texte in `tutorial.yaml`; nur das Matching ist Code.
+  Verb-Matching nutzt die Registry (alias-fähig, keine hartkodierten Alias-Listen).
+- **Geringe Kopplung an Content**: Schritte sind verb-/richtungs-basiert (kein fixer
+  Item-Name nötig); ändert sich der Start-Content, bleibt das Tutorial gültig.
+  `go_to_room` funktioniert, weil nach dem `go`-Schritt zwei Räume besucht sind.
+- **Echtes Spiel, kein Sandbox**: Tutorial-Aktionen sind reale Züge (Turn/Quests/
+  Autosave laufen). Risiko: der Spieler „verbraucht" den ersten Raum — bewusst
+  akzeptiert (es ist die echte Welt; nichts geht verloren).
+- **`skip`-Sonderfall**: nur während aktivem Tutorial abgefangen; außerhalb bleibt
+  `skip` ein unbekanntes Verb (harmlos).
+- Risiko: `expect`-Tokens (`go_direction`/`go_to_room` + Verbnamen) sind ein kleines
+  bespoke Schema; dokumentiert in `tutorial.yaml`-Kommentar und im Loader.

Semesterprojekt/docs/superpowers/specs/2026-06-01-use-x-on-y-design.md

@@ -0,0 +1,206 @@
+# Spec: Item-Kombination `use X on Y`
+
+Stand: 2026-06-01. Erste der verbleibenden Mechaniken nach Hauptmenü +
+Speichern/Laden. Setzt das in `enhancement-ideas.md` #5b (Mechanik-Spine §4)
+festgelegte Item-Kombinations-Feature um. Baut auf der bestehenden
+Condition/Effect-Engine, dem datengetriebenen Loader (wie quests/endings) und
+dem vorhandenen `UseCommand` auf.
+
+## 1. Kontext & Ziel
+
+v1.0 hat bewusst argloses `use X` ohne Ziel gewählt. Ziel jetzt: **`use X on Y`**
+als datengetriebene **Kombinations-Mechanik** — ein Rezept kann Bedingungen
+prüfen, Items verbrauchen, ein Item erzeugen, Flags setzen und einen Text
+ausgeben. Deckt sowohl Transform (`matches + torch → lit_torch`) als auch
+Anwenden-auf-Ziel (`use key on door → effekt`) mit *einem* Modell ab.
+
+Bestätigte Entscheidungen (Brainstorming 2026-06-01):
+- **Allgemeine, datengetriebene Rezepte** (requires / consume / produce / effects
+  / response / failText) — Superset, nutzt die vorhandene Engine.
+- **Operanden** lösen aus **Inventar oder aktuellem Raum** auf (`use key on door`,
+  `use matches on torch`).
+- **Fehlschlag**: kein Rezept → generische Zeile; Rezept vorhanden aber `requires`
+  nicht erfüllt → optionales `failText` (Hinweis), sonst generische Zeile.
+- **Demo**: ein minimales Showcase-Rezept (`matches + torch → lit_torch`) plus die
+  wenigen dafür nötigen Items, in bestehende Räume gestellt.
+
+## 2. Scope
+
+**In Scope:**
+- `UseCommand`-Routing: 0 Args → "Use what?"; 1 Arg → bestehendes Einzel-`use`;
+  ≥2 Args → Kombination der ersten beiden Operanden.
+- `Combination`-Datenmodell + optionale `combinations.yaml` (geladen wie
+  quests/endings über `readListOptional`).
+- `CombinationDto` + Factory + `World.combinations` (Map mit kanonischem Paar-Key).
+- `Combinations`-Engine (`game`) — Auflösung, Lookup, requires/consume/produce/
+  effects/response/failText.
+- `WorldValidator`-Regeln: `a`/`b`/`consume`/`produce` referenzieren existierende
+  Item-Ids; keine doppelten Paare.
+- Minimales Demo-Rezept + Items.
+- Tests: Engine, UseCommand-Routing, Loader, Validator.
+
+**Out of Scope:**
+- Parser-Änderung — `on`/`with`/`to` sind **bereits** Filler (s. §3); keine neue
+  Grammatik nötig.
+- Mehrteilige (>2) Rezepte / Kombination aus 3+ Items.
+- Mehrwort-Item-Namen-Auflösung (Operanden lösen per Item-Id auf, wie heute).
+- Größerer Content-/Rätsel-Ausbau (eigenes Teilprojekt).
+
+## 3. Grammatik & Parsing (keine Änderung nötig)
+
+`CommandParser.FILLERS` enthält bereits `to`, `with`, `on`, `at`, `the`, `a`,
+`an`. Daher liefern alle drei Eingaben dieselbe Args-Liste:
+
+```
+use matches on torch    → verb=use, args=[matches, torch]
+use matches with torch  → verb=use, args=[matches, torch]
+use matches torch       → verb=use, args=[matches, torch]
+```
+
+`UseCommand` verzweigt nur über die Arg-Anzahl:
+
+```java
+if (args.isEmpty()) { io.write("Use what?"); return; }
+if (args.size() >= 2) { Combinations.tryUse(ctx, args.get(0), args.get(1)); return; }
+// 1 Arg: bestehende Einzel-use-Logik (Inventar dann Raum, item.use(ctx))
+```
+
+Bei ≥2 Args zählen die **ersten beiden** Tokens als Operandenpaar.
+
+## 4. Datenmodell (model)
+
+```java
+public record Combination(
+        String a, String b,            // Operanden-Item-Ids (ungeordnet)
+        List<Condition> requires,      // optional; leer = immer erfüllt
+        List<String> consume,          // Item-Ids, die entfernt werden
+        String produce,                // optional; Item-Id, die ins Inventar kommt (null = keins)
+        List<Effect> effects,          // optional; Flag-Mutationen
+        String response,               // Erfolgstext
+        String failText                // optional; Hinweis bei nicht erfüllten requires
+) {
+    public Combination {
+        requires = requires == null ? List.of() : List.copyOf(requires);
+        consume  = consume  == null ? List.of() : List.copyOf(consume);
+        effects  = effects  == null ? List.of() : List.copyOf(effects);
+    }
+    /** Kanonischer, reihenfolge-unabhängiger Schlüssel für ein Item-Paar. */
+    public static String key(String x, String y) {
+        return x.compareTo(y) <= 0 ? x + "|" + y : y + "|" + x;
+    }
+    public String key() { return key(a, b); }
+}
+```
+
+`combinations.yaml` (Demo):
+```yaml
+- a: matches
+  b: torch
+  consume: [matches]
+  produce: lit_torch
+  response: |
+    You strike the matches; the torch catches with a low hiss and steady glow.
+  # requires/effects/failText optional, hier nicht nötig
+```
+
+`World` erhält `Map<String, Combination> combinations` (Key = `Combination.key()`).
+Backward-kompatible Konstruktor-Überladung wie bei quests/endings.
+
+## 5. Kombinations-Engine (game/Combinations.java)
+
+Statische Utility wie `Conditions`/`Effects`/`Light`:
+
+```java
+public static void tryUse(GameContext ctx, String idX, String idY) {
+    Player p = ctx.getPlayer();
+    // 1. Beide Operanden auflösen (Inventar zuerst, dann aktueller Raum)
+    if (!present(ctx, idX)) { ctx.getIo().write(noSuch(idX)); return; }
+    if (!present(ctx, idY)) { ctx.getIo().write(noSuch(idY)); return; }
+    // 2. Rezept-Lookup über kanonischen Key
+    Combination c = ctx.getWorld().getCombinations().get(Combination.key(idX, idY));
+    if (c == null) { ctx.getIo().write("Nothing happens."); return; }
+    // 3. requires prüfen
+    if (!Conditions.all(c.requires(), ctx)) {
+        ctx.getIo().write(c.failText() != null ? c.failText() : "Nothing happens.");
+        return;
+    }
+    // 4. consume → produce → effects → response
+    for (String id : c.consume()) { removeFromAnywhere(ctx, id); }
+    if (c.produce() != null) {
+        Item produced = ctx.getWorld().getItems().get(c.produce());
+        p.addItem(produced);
+    }
+    Effects.applyAll(c.effects(), ctx);
+    ctx.getIo().print(/* response als StyledText */);
+}
+```
+
+Hilfsmethoden:
+- `present(ctx, id)` → Inventar **oder** aktueller Raum enthält `id`.
+- `removeFromAnywhere(ctx, id)` → `player.removeItem(id)`, sonst
+  `currentRoom.removeItem(id)`.
+- `noSuch(id)` → "There is no '<id>' here or in your inventory." (wie UseCommand).
+- Erzeugtes Item ist in `items.yaml` definiert, aber in **keinem** Raum platziert
+  (existiert in `world.getItems()`, „nirgends"), bis es gefertigt wird → dann ins
+  Inventar. Save/Load erfasst Item-Platzierung + Switch-Zustände bereits korrekt;
+  ungefertigte Items bleiben unplatziert.
+
+## 6. Loader-Anbindung
+
+- `CombinationDto` (Jackson-Record): `a, b, requires, consume, produce, effects,
+  response, failText`. `requires`/`effects` via `ConditionDto.toModelList` /
+  `EffectDto.toModelList` (vorhanden).
+- `WorldLoader`: `readListOptional(basePath + "/combinations.yaml", CombinationDto.class)`.
+- `CombinationFactory`: DTO → `Combination`; sammelt in `Map<String, Combination>`
+  per `Combination.key()`. Doppelter Key → `WorldLoadException`.
+- `World.combinations` + Getter; backward-kompatible Konstruktoren.
+
+## 7. Validierung (WorldValidator)
+
+- `a`, `b`, jede `consume`-Id und (falls gesetzt) `produce` müssen in der
+  Item-Registry existieren → sonst `WorldLoadException` mit klarer Meldung.
+- Doppelte Paar-Keys → Fehler (im Factory bereits abgefangen; Validator
+  dokumentiert die Regel).
+- `requires`/`effects` nutzen die bestehende Condition/Effect-Validierung, falls
+  vorhanden; sonst rein strukturell.
+
+## 8. Demo-Content (minimal)
+
+- `items.yaml`: `matches` (plain), `torch` (plain, `light: false`), `lit_torch`
+  (**plain mit `light: true`**). `Light.isActiveLight` wertet ein Nicht-Switchable
+  mit `light: true` als **immer aktive** Lichtquelle (nur SwitchableItems müssen
+  „on" sein) — also ist `lit_torch` eine dauerhaft brennende Lichtquelle, ohne
+  Toggle. `lit_torch` wird **nicht** in einem Raum platziert (entsteht nur durchs
+  Rezept).
+- `rooms.yaml`: `matches` und `torch` in erreichbare Räume legen.
+- `combinations.yaml`: das eine Rezept aus §4.
+- Spielbar nachweisbar: `take matches`, `take torch`, `use matches on torch` →
+  `lit_torch` im Inventar (Lichtquelle), `matches` verbraucht.
+
+## 9. Tests
+
+- **`CombinationsTest`**: ungeordneter Match (`X on Y` == `Y on X`); `requires`
+  erfüllt/nicht erfüllt (failText vs. generisch); consume aus Inventar **und** aus
+  Raum; produce landet im Inventar; effects gesetzt; kein Rezept → "Nothing
+  happens."; fehlender Operand → noSuch-Meldung.
+- **`UseCommand`-Routing**: 0 Args → "Use what?"; 1 Arg → `item.use` (bestehend);
+  2 Args → Combinations-Pfad (über Fake-/TestIO + kleine Welt).
+- **Loader**: `combinations.yaml` → `World.combinations` korrekt; Key-Kanonisierung;
+  doppeltes Paar → Exception.
+- **Validator**: unbekannte `a`/`b`/`consume`/`produce`-Id → `WorldLoadException`.
+- Konvention: keine GUI-/YAML-abhängigen Domain-Tests; Engine-Tests bauen Welt
+  inline wie `QuestEngineTest`.
+
+## 10. Architektur-Werte / Risiken
+
+- **Datengetrieben**: Rezepte in YAML, kein Hardcoding; gleiche DTO/Domain-Trennung
+  wie quests/endings.
+- **Geringe Kopplung**: neue `Combinations`-Utility neben `Conditions`/`Effects`;
+  `UseCommand` bekommt nur eine Verzweigung. Kein Parser-Eingriff.
+- **Reihenfolge-Unabhängigkeit** über kanonischen Key vermeidet doppelte Rezepte.
+- **Erzeugte Items** „aus dem Nichts": müssen in `items.yaml` definiert, aber
+  unplatziert sein — Validator stellt Existenz sicher; Save/Load erfasst sie nach
+  dem Fertigen automatisch.
+- Risiko: `produce` eines bereits irgendwo platzierten Items würde dieselbe Instanz
+  ins Inventar verschieben (Items sind Singletons). Demo vermeidet das (unplatziert).
+  Validator/Doku weist darauf hin.

Semesterprojekt/pom.xml

@@ -49,6 +49,18 @@
             <version>${logback.version}</version>
         </dependency>
 
+        <!-- OGG Vorbis decoding (GUI background music) -->
+        <dependency>
+            <groupId>com.googlecode.soundlibs</groupId>
+            <artifactId>vorbisspi</artifactId>
+            <version>1.0.3.3</version>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.soundlibs</groupId>
+            <artifactId>jorbis</artifactId>
+            <version>0.0.17.4</version>
+        </dependency>
+
         <!-- Tests -->
         <dependency>
             <groupId>org.junit.jupiter</groupId>

Semesterprojekt/src/main/java/thb/jeanluc/adventure/App.java

@@ -10,21 +10,39 @@ import thb.jeanluc.adventure.command.impl.GoCommand;
 import thb.jeanluc.adventure.command.impl.HelpCommand;
 import thb.jeanluc.adventure.command.impl.InventoryCommand;
 import thb.jeanluc.adventure.command.impl.LookCommand;
-import thb.jeanluc.adventure.command.impl.QuitCommand;
+import thb.jeanluc.adventure.command.impl.MapCommand;
+import thb.jeanluc.adventure.command.impl.MenuCommand;
+import thb.jeanluc.adventure.command.impl.QuestsCommand;
 import thb.jeanluc.adventure.command.impl.ReadCommand;
+import thb.jeanluc.adventure.command.impl.SaveCommand;
 import thb.jeanluc.adventure.command.impl.TakeCommand;
 import thb.jeanluc.adventure.command.impl.TalkCommand;
 import thb.jeanluc.adventure.command.impl.UseCommand;
 import thb.jeanluc.adventure.game.Game;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.GameSession;
+import thb.jeanluc.adventure.game.TutorialGuide;
 import thb.jeanluc.adventure.io.ConsoleIO;
 import thb.jeanluc.adventure.io.GameIO;
+import thb.jeanluc.adventure.io.text.Banner;
+import thb.jeanluc.adventure.loader.TutorialLoader;
 import thb.jeanluc.adventure.loader.WorldLoader;
+import thb.jeanluc.adventure.menu.MainMenu;
+import thb.jeanluc.adventure.menu.SettingsMenu;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.save.SaveException;
+import thb.jeanluc.adventure.save.SaveService;
+import thb.jeanluc.adventure.save.SaveSlotInfo;
+import thb.jeanluc.adventure.save.Settings;
+import thb.jeanluc.adventure.save.SettingsStore;
+
+import java.util.List;
 
 /**
- * Entry point for the console version of the game. Loads the world from
+ * Console entry point. Loads settings, then runs the main-menu shell loop:
- * YAML, wires up the command registry, and hands control to the
+ * New Game / Load / Settings / Quit. Each game runs the shared {@link Game}
- * {@link Game} loop.
+ * loop and returns here when the player saves-and-exits, reaches an ending,
+ * or input ends. Shared by console and GUI via {@link #run(GameIO)}.
  */
 @Slf4j
 public final class App {
@@ -32,11 +50,7 @@ public final class App {
     private App() {
     }
 
-    /**
+    /** Standard JVM entry point. @param args ignored */
-     * Standard JVM entry point.
-     *
-     * @param args ignored
-     */
     public static void main(String[] args) {
         GameIO io = new ConsoleIO();
         try {
@@ -48,15 +62,51 @@ public final class App {
         }
     }
 
-    /**
+    /** Runs the menu shell on the given IO until the player quits. */
-     * Boots the game on the given IO channel. Reusable by both
-     * {@link App} (console) and {@code AppGui} (Swing worker thread).
-     *
-     * @param io the IO channel to use
-     */
     public static void run(GameIO io) {
+        SaveService saves = new SaveService();
+        SettingsStore settingsStore = new SettingsStore();
+        Settings settings = settingsStore.load();
+        SettingsMenu.apply(settings, io);
+
+        boolean running = true;
+        while (running) {
+            switch (MainMenu.show(io)) {
+                case NEW_GAME -> play(io, saves, newSession(io), true);
+                case LOAD -> {
+                    SaveSlotInfo slot = MainMenu.pickSlot(io, saves);
+                    if (slot != null) {
+                        try {
+                            play(io, saves, saves.load(slot.slug()), false);
+                        } catch (SaveException e) {
+                            io.write("Could not load: " + e.getUserMessage());
+                        }
+                    }
+                }
+                case SETTINGS -> settings = SettingsMenu.show(io, settings, settingsStore);
+                case QUIT -> running = false;
+            }
+        }
+        io.write("Farewell.");
+    }
+
+    /** Loads a fresh world and binds it to a newly named session. */
+    private static GameSession newSession(GameIO io) {
         WorldLoader.LoadResult loaded = new WorldLoader().load();
-        GameContext ctx = new GameContext(loaded.world(), loaded.player(), io);
+        String name = MainMenu.promptName(io, "Manor");
+        return new GameSession(loaded.world(), loaded.player(), name);
+    }
+
+    /** Builds the registry, runs one game to completion, autosaving to its slot. */
+    private static void play(GameIO io, SaveService saves, GameSession session, boolean withTutorial) {
+        GameContext ctx = new GameContext(session, io);
+        ctx.setSaveCallback(() -> {
+            try {
+                saves.save(session);
+            } catch (SaveException e) {
+                log.warn("Autosave failed", e);
+            }
+        });
 
         CommandRegistry registry = new CommandRegistry();
         registry.register(new GoCommand(), "go", "move", "walk");
@@ -67,20 +117,31 @@ public final class App {
         registry.register(new UseCommand(), "use");
         registry.register(new ReadCommand(), "read");
         registry.register(new ExamineCommand(), "examine", "x", "inspect");
+        registry.register(new MapCommand(), "map", "m");
+        registry.register(new QuestsCommand(), "quests", "log", "journal");
         registry.register(new TalkCommand(), "talk", "speak");
         registry.register(new GiveCommand(), "give");
-        registry.register(new HelpCommand(registry), "help", "?");
+        registry.register(new SaveCommand(saves), "save");
-
-        QuitCommand quit = new QuitCommand();
-        registry.register(quit, "quit", "exit");
 
         Game game = new Game(ctx, registry, new CommandParser());
-        quit.bind(game);
 
-        io.write(loaded.world().getTitle());
+        MenuCommand menu = new MenuCommand(saves);
-        io.write(loaded.world().getWelcomeMessage());
+        menu.bind(game);
-        new LookCommand().execute(ctx, java.util.List.of());
+        registry.register(menu, "menu", "quit", "exit");
+        registry.register(new HelpCommand(registry), "help", "?");
+
+        if (withTutorial) {
+            Tutorial tutorial = new TutorialLoader().load();
+            if (!tutorial.isEmpty()) {
+                game.setTutorialGuide(new TutorialGuide(tutorial, registry));
+            }
+        }
+
+        io.print(Banner.welcome(session.getWorld().getTitle()));
+        io.write(session.getWorld().getWelcomeMessage());
+        new LookCommand().execute(ctx, List.of());
 
         game.run();
+        io.setMusic(null); // fade music out when returning to the menu
     }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/ExamineCommand.java

@@ -2,6 +2,7 @@ package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.Light;
 import thb.jeanluc.adventure.model.Npc;
 import thb.jeanluc.adventure.model.item.Item;
 
@@ -20,6 +21,10 @@ public class ExamineCommand implements Command {
             ctx.getIo().write("Examine what?");
             return;
         }
+        if (!Light.isLit(ctx, ctx.getPlayer().getCurrentRoom())) {
+            ctx.getIo().write("It's too dark to see that.");
+            return;
+        }
         String id = args.getFirst();
         Optional<Item> item = ctx.getPlayer().findItem(id);
         if (item.isEmpty()) {

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/GiveCommand.java

@@ -1,6 +1,8 @@
 package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Conditions;
+import thb.jeanluc.adventure.game.Effects;
 import thb.jeanluc.adventure.game.GameContext;
 import thb.jeanluc.adventure.model.Npc;
 import thb.jeanluc.adventure.model.NpcReaction;
@@ -44,12 +46,17 @@ public class GiveCommand implements Command {
         }
 
         NpcReaction reaction = reactionOpt.get();
+        if (!Conditions.all(reaction.getRequires(), ctx)) {
+            ctx.getIo().write(npc.getName() + " isn't ready for that yet.");
+            return;
+        }
         if (reaction.getConsumes() != null) {
             ctx.getPlayer().removeItem(reaction.getConsumes().getId());
         }
         if (reaction.getGives() != null) {
             ctx.getPlayer().addItem(reaction.getGives());
         }
+        Effects.applyAll(reaction.getEffects(), ctx);
         ctx.getIo().write(npc.getName() + ": " + reaction.getResponse());
     }
 

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/GoCommand.java

@@ -1,43 +1,128 @@
 package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Conditions;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.Light;
+import thb.jeanluc.adventure.game.Pathfinder;
+import thb.jeanluc.adventure.map.MapLayout;
 import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
 import thb.jeanluc.adventure.model.Room;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
 /**
- * Moves the player into the room reachable in a given direction.
+ * Moves the player. {@code go <direction>} steps once to a connected room.
- * Usage: {@code go <direction>}.
+ * {@code go to <room>} auto-walks the shortest path (BFS) over already-visited
+ * rooms, honouring locked exits and darkness. Usage: {@code go <direction>} or
+ * {@code go to <room>}. The parser strips the filler word "to", so "go to
+ * &lt;room&gt;" and "go &lt;room&gt;" are equivalent.
  */
 public class GoCommand implements Command {
 
     @Override
     public void execute(GameContext ctx, List<String> args) {
         if (args.isEmpty()) {
-            ctx.getIo().write("Go where? Try 'go north'.");
+            ctx.getIo().write("Go where? Try 'go north' or 'go to <room>'.");
             return;
         }
-        Direction dir;
         try {
-            dir = Direction.fromString(args.getFirst());
+            Direction dir = Direction.fromString(args.getFirst());
-        } catch (IllegalArgumentException e) {
+            moveDirection(ctx, dir);
-            ctx.getIo().write("I don't know which way '" + args.getFirst() + "' is.");
+        } catch (IllegalArgumentException notADirection) {
-            return;
+            goToRoom(ctx, args);
         }
-        Optional<Room> next = ctx.getPlayer().getCurrentRoom().getExit(dir);
+    }
+
+    /** Single-step move in a compass direction (the original behaviour). */
+    private void moveDirection(GameContext ctx, Direction dir) {
+        Room here = ctx.getPlayer().getCurrentRoom();
+        Optional<Room> next = here.getExit(dir);
         if (next.isEmpty()) {
             ctx.getIo().write("You can't go " + dir.getLabel() + " from here.");
             return;
         }
+        ExitLock lock = here.getExitLocks().get(dir);
+        if (lock != null && !Conditions.all(lock.requires(), ctx)) {
+            ctx.getIo().write(lock.blocked());
+            return;
+        }
+        if (!Light.isLit(ctx, next.get())) {
+            ctx.getIo().write("It's pitch black beyond the doorway — you need a lit light source "
+                    + "(try lighting your lamp with 'use lamp').");
+            return;
+        }
         ctx.getPlayer().setCurrentRoom(next.get());
         new LookCommand().execute(ctx, List.of());
     }
 
+    /** Resolve a visited room by id/name and auto-walk the BFS path to it. */
+    private void goToRoom(GameContext ctx, List<String> args) {
+        String name = String.join(" ", args).toLowerCase();
+        Room target = resolveVisited(ctx, name);
+        if (target == null) {
+            ctx.getIo().write("You don't know any direction or place called '" + name + "'.");
+            return;
+        }
+        Room start = ctx.getPlayer().getCurrentRoom();
+        if (target == start) {
+            ctx.getIo().write("You're already in the " + target.getName() + ".");
+            return;
+        }
+        List<Room> path = Pathfinder.findPath(ctx, target);
+        if (path.isEmpty()) {
+            ctx.getIo().write("You can't find a way there right now.");
+            return;
+        }
+        List<Room> route = new ArrayList<>();
+        route.add(start);
+        route.addAll(path);
+        for (Room step : path) {
+            ctx.getPlayer().setCurrentRoom(step);
+            ctx.getIo().travelStep(MapLayout.compute(
+                    ctx.getWorld(), ctx.getPlayer().getVisitedRoomIds(), step));
+        }
+        ctx.getIo().write(summary(route));
+        new LookCommand().execute(ctx, List.of());
+    }
+
+    /** Finds a visited room whose id or display name matches {@code name}. */
+    private Room resolveVisited(GameContext ctx, String name) {
+        // the command test harness (CommandTestSupport) uses a null world; production always has one
+        if (ctx.getWorld() == null) {
+            return null;
+        }
+        for (String id : ctx.getPlayer().getVisitedRoomIds()) {
+            Room r = ctx.getWorld().getRooms().get(id);
+            if (r == null) {
+                continue;
+            }
+            if (id.equalsIgnoreCase(name) || r.getName().equalsIgnoreCase(name)) {
+                return r;
+            }
+        }
+        return null;
+    }
+
+    /** Names start, destination, and at most one middle waypoint. */
+    private String summary(List<Room> route) {
+        int n = route.size();
+        String start = route.get(0).getName();
+        String dest = route.get(n - 1).getName();
+        if (n >= 3) {
+            String middle = route.get(n / 2).getName();
+            return "You make your way from the " + start + ", through the " + middle
+                    + ", to the " + dest + ".";
+        }
+        return "You make your way from the " + start + " to the " + dest + ".";
+    }
+
     @Override
     public String help() {
-        return "go <direction>  -  move to the connected room (north/south/east/west)";
+        return "go <direction>  -  move one room (north/south/east/west); "
+                + "or  go to <room>  to travel to a known room";
     }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/LookCommand.java

@@ -1,50 +1,42 @@
 package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Conditions;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.Light;
+import thb.jeanluc.adventure.io.text.RoomView;
+import thb.jeanluc.adventure.model.DescriptionState;
 import thb.jeanluc.adventure.model.Direction;
 import thb.jeanluc.adventure.model.Npc;
 import thb.jeanluc.adventure.model.Room;
 import thb.jeanluc.adventure.model.item.Item;
 
 import java.util.List;
-import java.util.stream.Collectors;
 
 /**
- * Prints a full description of the room the player is currently in:
+ * Describes the current room by emitting a {@link RoomView}; the active
- * name, description, visible items, visible NPCs, and available exits.
+ * frontend decides how to render it. Usage: {@code look}.
- * Usage: {@code look}.
  */
 public class LookCommand implements Command {
 
     @Override
     public void execute(GameContext ctx, List<String> args) {
         Room room = ctx.getPlayer().getCurrentRoom();
-        StringBuilder sb = new StringBuilder();
+        if (!Light.isLit(ctx, room)) {
-        sb.append("== ").append(room.getName()).append(" ==\n");
+            ctx.getIo().write("It's pitch black; you can't make anything out. You need a light source.");
-        sb.append(room.getDescription().stripTrailing());
+            return;
-
-        if (!room.getItems().isEmpty()) {
-            String items = room.getItems().values().stream()
-                    .map(Item::getName)
-                    .collect(Collectors.joining(", "));
-            sb.append("\nYou see: ").append(items).append('.');
         }
-        if (!room.getNpcs().isEmpty()) {
+        List<String> items = room.getItems().values().stream().map(Item::getName).toList();
-            String npcs = room.getNpcs().values().stream()
+        List<String> npcs = room.getNpcs().values().stream().map(Npc::getName).toList();
-                    .map(Npc::getName)
+        List<String> exits = room.getExits().keySet().stream().map(Direction::getLabel).toList();
-                    .collect(Collectors.joining(", "));
+        String description = room.getDescription();
-            sb.append("\nHere is: ").append(npcs).append('.');
+        for (DescriptionState ds : room.getDescriptionStates()) {
+            if (Conditions.all(ds.when(), ctx)) {
+                description = ds.text();
+                break;
             }
-        if (room.getExits().isEmpty()) {
-            sb.append("\nThere are no obvious exits.");
-        } else {
-            String exits = room.getExits().keySet().stream()
-                    .map(Direction::getLabel)
-                    .collect(Collectors.joining(", "));
-            sb.append("\nExits: ").append(exits).append('.');
         }
-        ctx.getIo().write(sb.toString());
+        ctx.getIo().showRoom(new RoomView(room.getName(), description, items, npcs, exits));
     }
 
     @Override

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/MapCommand.java

@@ -0,0 +1,26 @@
+package thb.jeanluc.adventure.command.impl;
+
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.io.text.MapView;
+import thb.jeanluc.adventure.map.MapLayout;
+
+import java.util.List;
+
+/** Shows the fog-of-war map of explored rooms. Usage: {@code map}. */
+public class MapCommand implements Command {
+
+    @Override
+    public void execute(GameContext ctx, List<String> args) {
+        MapView view = MapLayout.compute(
+                ctx.getWorld(),
+                ctx.getPlayer().getVisitedRoomIds(),
+                ctx.getPlayer().getCurrentRoom());
+        ctx.getIo().showMap(view);
+    }
+
+    @Override
+    public String help() {
+        return "map  -  show the map of explored rooms";
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/MenuCommand.java

@@ -0,0 +1,44 @@
+package thb.jeanluc.adventure.command.impl;
+
+import lombok.RequiredArgsConstructor;
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Game;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.save.SaveException;
+import thb.jeanluc.adventure.save.SaveService;
+
+import java.util.List;
+
+/**
+ * Saves the active slot and returns to the main menu by stopping the loop.
+ * Usage: {@code menu} (aliases {@code quit}, {@code exit}).
+ */
+@RequiredArgsConstructor
+public class MenuCommand implements Command {
+
+    private final SaveService saves;
+    private Game game;
+
+    /** Binds the running game (two-phase wiring, as the registry is built first). */
+    public void bind(Game game) {
+        this.game = game;
+    }
+
+    @Override
+    public void execute(GameContext ctx, List<String> args) {
+        try {
+            saves.save(ctx.getSession());
+            ctx.getIo().write("Game saved. Returning to the main menu.");
+        } catch (SaveException e) {
+            ctx.getIo().write("Could not save: " + e.getUserMessage());
+        }
+        if (game != null) {
+            game.stop();
+        }
+    }
+
+    @Override
+    public String help() {
+        return "menu  -  save and return to the main menu (aliases: quit, exit)";
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/QuestsCommand.java

@@ -0,0 +1,21 @@
+package thb.jeanluc.adventure.command.impl;
+
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.QuestEngine;
+
+import java.util.List;
+
+/** Shows the active and completed quests. Usage: {@code quests}. */
+public class QuestsCommand implements Command {
+
+    @Override
+    public void execute(GameContext ctx, List<String> args) {
+        ctx.getIo().showQuests(QuestEngine.viewOf(ctx));
+    }
+
+    @Override
+    public String help() {
+        return "quests  -  show your active and completed quests (alias: log, journal)";
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/QuitCommand.java

@@ -1,41 +0,0 @@
-package thb.jeanluc.adventure.command.impl;
-
-import thb.jeanluc.adventure.command.Command;
-import thb.jeanluc.adventure.game.Game;
-import thb.jeanluc.adventure.game.GameContext;
-
-import java.util.List;
-
-/**
- * Ends the game loop. Holds a reference to the {@link Game} so it can
- * flip the loop flag. Usage: {@code quit}.
- */
-public class QuitCommand implements Command {
-
-    /** The game whose loop is to be stopped. Set via {@link #bind(Game)}. */
-    private Game game;
-
-    /**
-     * Binds the game instance after construction. Two-phase wiring is
-     * necessary because the registry is typically built before the game
-     * starts running.
-     *
-     * @param game the running game; must not be null
-     */
-    public void bind(Game game) {
-        this.game = game;
-    }
-
-    @Override
-    public void execute(GameContext ctx, List<String> args) {
-        ctx.getIo().write("Goodbye.");
-        if (game != null) {
-            game.stop();
-        }
-    }
-
-    @Override
-    public String help() {
-        return "quit  -  exit the game (alias: exit)";
-    }
-}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/SaveCommand.java

@@ -0,0 +1,31 @@
+package thb.jeanluc.adventure.command.impl;
+
+import lombok.RequiredArgsConstructor;
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.save.SaveException;
+import thb.jeanluc.adventure.save.SaveService;
+
+import java.util.List;
+
+/** Manually saves the active slot. Usage: {@code save}. */
+@RequiredArgsConstructor
+public class SaveCommand implements Command {
+
+    private final SaveService saves;
+
+    @Override
+    public void execute(GameContext ctx, List<String> args) {
+        try {
+            saves.save(ctx.getSession());
+            ctx.getIo().write("Game saved.");
+        } catch (SaveException e) {
+            ctx.getIo().write(e.getUserMessage());
+        }
+    }
+
+    @Override
+    public String help() {
+        return "save  -  save your game to the current slot";
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/TakeCommand.java

@@ -2,6 +2,7 @@ package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.Light;
 import thb.jeanluc.adventure.model.Room;
 import thb.jeanluc.adventure.model.item.Item;
 
@@ -20,6 +21,10 @@ public class TakeCommand implements Command {
             ctx.getIo().write("Take what?");
             return;
         }
+        if (!Light.isLit(ctx, ctx.getPlayer().getCurrentRoom())) {
+            ctx.getIo().write("It's too dark to see that.");
+            return;
+        }
         String itemId = args.getFirst();
         Room room = ctx.getPlayer().getCurrentRoom();
         Optional<Item> taken = room.removeItem(itemId);

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/TalkCommand.java

@@ -1,7 +1,9 @@
 package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Conditions;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.model.DialogueLine;
 import thb.jeanluc.adventure.model.Npc;
 
 import java.util.List;
@@ -24,7 +26,15 @@ public class TalkCommand implements Command {
             ctx.getIo().write("There is no '" + npcId + "' here to talk to.");
             return;
         }
-        ctx.getIo().write(npc.get().getName() + " says: " + npc.get().getGreeting());
+        Npc found = npc.get();
+        String line = found.getGreeting();
+        for (DialogueLine dl : found.getDialogue()) {
+            if (Conditions.all(dl.when(), ctx)) {
+                line = dl.text();
+                break;
+            }
+        }
+        ctx.getIo().write(found.getName() + " says: " + line);
     }
 
     @Override

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/UseCommand.java

@@ -1,6 +1,7 @@
 package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.game.Combinations;
 import thb.jeanluc.adventure.game.GameContext;
 import thb.jeanluc.adventure.model.item.Item;
 
@@ -8,9 +9,10 @@ import java.util.List;
 import java.util.Optional;
 
 /**
- * Invokes the item-specific {@link Item#use(GameContext)} action. The
+ * With one argument, invokes the item-specific {@link Item#use(GameContext)}
- * item must either be in the player's inventory or in the current room.
+ * action; the item must be in the player's inventory or the current room.
- * Usage: {@code use <item-id>}.
+ * With two arguments ({@code use <item> on <item>}), delegates to the
+ * combination engine. Usage: {@code use <item>} or {@code use <item> on <item>}.
  */
 public class UseCommand implements Command {
 
@@ -20,6 +22,10 @@ public class UseCommand implements Command {
             ctx.getIo().write("Use what?");
             return;
         }
+        if (args.size() >= 2) {
+            Combinations.tryUse(ctx, args.get(0), args.get(1));
+            return;
+        }
         String itemId = args.getFirst();
         Optional<Item> item = ctx.getPlayer().findItem(itemId);
         if (item.isEmpty()) {
@@ -34,6 +40,6 @@ public class UseCommand implements Command {
 
     @Override
     public String help() {
-        return "use <item>  -  use an item (read it, switch it on/off, ...)";
+        return "use <item>  -  use an item; or  use <item> on <item>  to combine them";
     }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/Combinations.java

@@ -0,0 +1,69 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.item.Item;
+
+/**
+ * Applies {@code use X on Y} item combinations. Stateless utility, mirroring
+ * {@link Conditions}/{@link Effects}/{@link Light}. Operands resolve from the
+ * player's inventory or the current room.
+ */
+public final class Combinations {
+
+    private Combinations() {
+    }
+
+    /**
+     * Attempts to combine the two named items. Prints a resolution error if an
+     * operand is absent, the recipe's {@code failText} (or a generic line) if a
+     * recipe's requirements are unmet, "Nothing happens." if there is no recipe,
+     * or applies consume/produce/effects + the response on success.
+     */
+    public static void tryUse(GameContext ctx, String idX, String idY) {
+        if (!present(ctx, idX)) {
+            ctx.getIo().write(noSuch(idX));
+            return;
+        }
+        if (!present(ctx, idY)) {
+            ctx.getIo().write(noSuch(idY));
+            return;
+        }
+        Combination c = ctx.getWorld().getCombinations().get(Combination.key(idX, idY));
+        if (c == null) {
+            ctx.getIo().write("Nothing happens.");
+            return;
+        }
+        if (!Conditions.all(c.requires(), ctx)) {
+            ctx.getIo().write(c.failText() != null ? c.failText() : "Nothing happens.");
+            return;
+        }
+        for (String id : c.consume()) {
+            removeFromAnywhere(ctx, id);
+        }
+        if (c.produce() != null) {
+            Item produced = ctx.getWorld().getItems().get(c.produce());
+            if (produced != null) {
+                ctx.getPlayer().addItem(produced);
+            }
+        }
+        Effects.applyAll(c.effects(), ctx);
+        if (c.response() != null && !c.response().isBlank()) {
+            ctx.getIo().write(c.response());
+        }
+    }
+
+    private static boolean present(GameContext ctx, String id) {
+        return ctx.getPlayer().hasItem(id)
+                || ctx.getPlayer().getCurrentRoom().findItem(id).isPresent();
+    }
+
+    private static void removeFromAnywhere(GameContext ctx, String id) {
+        if (ctx.getPlayer().removeItem(id).isEmpty()) {
+            ctx.getPlayer().getCurrentRoom().removeItem(id);
+        }
+    }
+
+    private static String noSuch(String id) {
+        return "There is no '" + id + "' here or in your inventory.";
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/Conditions.java

@@ -0,0 +1,33 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Condition;
+
+import java.util.List;
+
+/** Evaluates {@link Condition}s against a {@link GameContext}. */
+public final class Conditions {
+
+    private Conditions() {
+    }
+
+    public static boolean holds(Condition c, GameContext ctx) {
+        return switch (c.type()) {
+            case FLAG -> ctx.getState().isSet(c.arg());
+            case NOT_FLAG -> !ctx.getState().isSet(c.arg());
+            case HAS_ITEM -> ctx.getPlayer().hasItem(c.arg());
+        };
+    }
+
+    /** True iff every condition holds. A null or empty list is vacuously true. */
+    public static boolean all(List<Condition> conditions, GameContext ctx) {
+        if (conditions == null) {
+            return true;
+        }
+        for (Condition c : conditions) {
+            if (!holds(c, ctx)) {
+                return false;
+            }
+        }
+        return true;
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/Effects.java

@@ -0,0 +1,43 @@
+package thb.jeanluc.adventure.game;
+
+import lombok.extern.slf4j.Slf4j;
+import thb.jeanluc.adventure.model.Effect;
+import thb.jeanluc.adventure.model.item.Item;
+
+import java.util.List;
+
+/** Applies {@link Effect}s to a {@link GameContext}. */
+@Slf4j
+public final class Effects {
+
+    private Effects() {
+    }
+
+    public static void apply(Effect e, GameContext ctx) {
+        switch (e.type()) {
+            case SET_FLAG -> ctx.getState().set(e.arg());
+            case CLEAR_FLAG -> ctx.getState().clear(e.arg());
+            case GIVE_ITEM -> {
+                Item it = ctx.getWorld().getItems().get(e.arg());
+                if (it == null) {
+                    log.warn("Effect GIVE_ITEM references unknown item '{}'", e.arg());
+                } else {
+                    ctx.getPlayer().addItem(it);
+                }
+            }
+            case REMOVE_ITEM -> ctx.getPlayer().removeItem(e.arg());
+            case SAY -> ctx.getIo().write(e.arg());
+            case START_QUEST -> ctx.getQuestLog().start(e.arg());
+        }
+    }
+
+    /** Applies each effect in order. A null list is a no-op. */
+    public static void applyAll(List<Effect> effects, GameContext ctx) {
+        if (effects == null) {
+            return;
+        }
+        for (Effect e : effects) {
+            apply(e, ctx);
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/EndingEngine.java

@@ -0,0 +1,46 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.io.text.StyledText;
+import thb.jeanluc.adventure.model.Ending;
+
+/** Detects the first matching ending and renders the end-of-game screen. */
+public final class EndingEngine {
+
+    private EndingEngine() {
+    }
+
+    /** First ending whose conditions hold, in list order; null if none. */
+    public static Ending triggered(GameContext ctx) {
+        for (Ending e : ctx.getWorld().getEndings()) {
+            if (Conditions.all(e.when(), ctx)) {
+                return e;
+            }
+        }
+        return null;
+    }
+
+    /** Builds the ending screen: title banner, text, and a run summary. */
+    public static StyledText render(Ending e, GameContext ctx, int turns) {
+        int total = ctx.getWorld().getQuests().size();
+        int done = ctx.getQuestLog().completed().size();
+        String bar = "═".repeat(Math.max(12, e.title().length() + 6));
+
+        StyledText.Builder b = StyledText.builder();
+        b.heading(bar + "\n").heading("  " + e.title() + "\n").heading(bar + "\n");
+        b.plain(e.text().stripTrailing()).plain("\n\n");
+        b.dim("Turns: " + turns + "\n");
+        b.dim("Quests completed: " + done + " / " + total + "\n");
+        b.heading("Rank: " + rank(e, total, done));
+        return b.build();
+    }
+
+    private static String rank(Ending e, int total, int done) {
+        if (e.victory() && total > 0 && done == total) {
+            return "Master of the Manor";
+        }
+        if (e.victory()) {
+            return "Manor Reclaimed";
+        }
+        return "Escaped — the manor keeps its secrets";
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/Game.java

@@ -5,6 +5,10 @@ import thb.jeanluc.adventure.command.Command;
 import thb.jeanluc.adventure.command.CommandParser;
 import thb.jeanluc.adventure.command.CommandRegistry;
 import thb.jeanluc.adventure.command.ParsedCommand;
+import thb.jeanluc.adventure.io.text.Hud;
+import thb.jeanluc.adventure.io.text.MapView;
+import thb.jeanluc.adventure.map.MapLayout;
+import thb.jeanluc.adventure.model.Ending;
 
 import java.util.Optional;
 
@@ -28,10 +32,23 @@ public class Game {
     /** Loop flag. Flipped to false by {@link #stop()}. */
     private boolean running = true;
 
+    /** Optional onboarding guide; null in normal/loaded play. */
+    private TutorialGuide tutorialGuide;
+
+    /** Wires the interactive tutorial (New Game only). */
+    public void setTutorialGuide(TutorialGuide tutorialGuide) {
+        this.tutorialGuide = tutorialGuide;
+    }
+
     /**
      * Runs the loop until {@link #stop()} is called or input is exhausted.
      */
     public void run() {
+        publishHud();
+        maybeEnd();
+        if (tutorialGuide != null) {
+            tutorialGuide.begin(ctx);
+        }
         while (running) {
             String input = ctx.getIo().readLine();
             if (input == null) {
@@ -41,13 +58,58 @@ public class Game {
             if (parsed.verb().isEmpty()) {
                 continue;
             }
+            if (tutorialGuide != null && tutorialGuide.isActive()
+                    && parsed.verb().equals("skip")) {
+                tutorialGuide.skip(ctx);
+                publishHud();
+                continue;
+            }
             Optional<Command> cmd = registry.find(parsed.verb());
             if (cmd.isEmpty()) {
                 ctx.getIo().write("I don't understand '" + parsed.verb() + "'. Type 'help'.");
             } else {
                 cmd.get().execute(ctx, parsed.args());
+                ctx.getSession().incrementTurn();
+                if (ctx.getSession().getTurn() % 10 == 0) {
+                    ctx.save();
+                }
+                if (tutorialGuide != null && tutorialGuide.isActive()) {
+                    tutorialGuide.onCommand(ctx, parsed);
                 }
             }
+            publishHud();
+            maybeEnd();
+        }
+    }
+
+    /** Ends the game if any ending's conditions are met, printing its screen. */
+    private void maybeEnd() {
+        // Don't end the game (win or lose) while the player is still in the tutorial —
+        // a pending ending fires once the walkthrough finishes or is skipped.
+        if (tutorialGuide != null && tutorialGuide.isActive()) {
+            return;
+        }
+        Ending e = EndingEngine.triggered(ctx);
+        if (e != null) {
+            ctx.getIo().print(EndingEngine.render(e, ctx, ctx.getSession().getTurn()));
+            stop();
+        }
+    }
+
+    private void publishHud() {
+        QuestEngine.tick(ctx);
+        ctx.getIo().setHud(new Hud(
+                ctx.getPlayer().getCurrentRoom().getName(),
+                ctx.getPlayer().getGold(),
+                ctx.getSession().getTurn(),
+                Light.carryingLight(ctx)));
+        MapView map = MapLayout.compute(
+                ctx.getWorld(),
+                ctx.getPlayer().getVisitedRoomIds(),
+                ctx.getPlayer().getCurrentRoom());
+        ctx.getIo().setMap(map);
+        ctx.getIo().setQuests(QuestEngine.viewOf(ctx));
+        ctx.getIo().setMusic(ctx.getPlayer().getCurrentRoom().getMusic());
     }
 
     /**

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/GameContext.java

@@ -1,26 +1,63 @@
 package thb.jeanluc.adventure.game;
 
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
 import thb.jeanluc.adventure.io.GameIO;
 import thb.jeanluc.adventure.model.Player;
 import thb.jeanluc.adventure.model.World;
 
 /**
- * Bundle of everything a command needs to do its work: the world, the
+ * Bundle of everything a command needs: the active {@link GameSession}
- * player, and the IO channel. Passing this single object keeps command
+ * (world, player, flags, quests, turn) and the IO channel. Getters delegate
- * signatures small and consistent.
+ * to the session so existing command code keeps working unchanged.
  */
-@Getter
-@RequiredArgsConstructor
 public class GameContext {
 
-    /** Loaded world (rooms, items, npcs). */
+    private final GameSession session;
-    private final World world;
-
-    /** The player avatar. */
-    private final Player player;
-
-    /** IO channel for reading input and writing output. */
     private final GameIO io;
+
+    /** Silent autosave hook, wired by the app; no-op by default (tests). */
+    private Runnable saveCallback = () -> { };
+
+    public GameContext(GameSession session, GameIO io) {
+        this.session = session;
+        this.io = io;
+    }
+
+    /** Convenience for tests/legacy callers: wraps a fresh single-use session. */
+    public GameContext(World world, Player player, GameIO io) {
+        this(new GameSession(world, player, "session"), io);
+    }
+
+    public GameSession getSession() {
+        return session;
+    }
+
+    public World getWorld() {
+        return session.getWorld();
+    }
+
+    public Player getPlayer() {
+        return session.getPlayer();
+    }
+
+    public GameState getState() {
+        return session.getState();
+    }
+
+    public QuestLog getQuestLog() {
+        return session.getQuestLog();
+    }
+
+    public GameIO getIo() {
+        return io;
+    }
+
+    /** Sets the silent autosave hook (called by interval/quest autosave). */
+    public void setSaveCallback(Runnable saveCallback) {
+        this.saveCallback = saveCallback;
+    }
+
+    /** Runs the silent autosave hook. */
+    public void save() {
+        saveCallback.run();
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/GameSession.java

@@ -0,0 +1,36 @@
+package thb.jeanluc.adventure.game;
+
+import lombok.Getter;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.World;
+
+/**
+ * Bundle of the mutable, savable game state for one playthrough: the
+ * loaded {@link World}, the {@link Player}, world {@link GameState} flags,
+ * {@link QuestLog} progress, the turn counter, and the bound save-slot name.
+ * Save/load read and write exactly this object.
+ */
+@Getter
+public class GameSession {
+
+    private final World world;
+    private final Player player;
+    private final GameState state = new GameState();
+    private final QuestLog questLog = new QuestLog();
+    private final String slotName;
+    private int turn;
+
+    public GameSession(World world, Player player, String slotName) {
+        this.world = world;
+        this.player = player;
+        this.slotName = slotName;
+    }
+
+    public void setTurn(int turn) {
+        this.turn = turn;
+    }
+
+    public void incrementTurn() {
+        this.turn++;
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/GameState.java

@@ -0,0 +1,34 @@
+package thb.jeanluc.adventure.game;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/** Named world flags. A flag is "set" (true) when present in the set. */
+public class GameState {
+
+    private final Set<String> flags = new LinkedHashSet<>();
+
+    public boolean isSet(String flag) {
+        return flags.contains(flag);
+    }
+
+    public void set(String flag) {
+        flags.add(flag);
+    }
+
+    public void clear(String flag) {
+        flags.remove(flag);
+    }
+
+    public Set<String> all() {
+        return Collections.unmodifiableSet(flags);
+    }
+
+    /** Replaces all flags with the given collection (used by load). */
+    public void restore(Collection<String> newFlags) {
+        flags.clear();
+        flags.addAll(newFlags);
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/Light.java

@@ -0,0 +1,44 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.SwitchableItem;
+
+import java.util.Collection;
+
+/** Decides whether a room is lit, given dark rooms and active light sources. */
+public final class Light {
+
+    private Light() {
+    }
+
+    /** A room is lit if it is not dark, or an active light source is carried or present. */
+    public static boolean isLit(GameContext ctx, Room room) {
+        if (!room.isDark()) {
+            return true;
+        }
+        return hasActiveLight(ctx.getPlayer().getInventory().values())
+                || hasActiveLight(room.getItems().values());
+    }
+
+    /** True if the player carries an active light source (for the HUD). */
+    public static boolean carryingLight(GameContext ctx) {
+        return hasActiveLight(ctx.getPlayer().getInventory().values());
+    }
+
+    private static boolean hasActiveLight(Collection<Item> items) {
+        for (Item it : items) {
+            if (isActiveLight(it)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static boolean isActiveLight(Item it) {
+        if (!it.isLight()) {
+            return false;
+        }
+        return !(it instanceof SwitchableItem s) || s.isOn();
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/Pathfinder.java

@@ -0,0 +1,76 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
+import thb.jeanluc.adventure.model.Room;
+
+import java.util.ArrayDeque;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Set;
+
+/**
+ * Breadth-first shortest-path search over the rooms the player has already
+ * visited, honouring the same gates as a manual move: locked exits and
+ * darkness. Stateless utility, alongside {@link Conditions}/{@link Effects}/
+ * {@link Light}.
+ */
+public final class Pathfinder {
+
+    private Pathfinder() {
+    }
+
+    /**
+     * Finds the shortest path from the player's current room to {@code target}.
+     *
+     * @param ctx    active game context
+     * @param target destination room (expected to be a visited room)
+     * @return the rooms to step through, excluding the start and ending at
+     *         {@code target}; empty if there is no currently-passable path
+     *         (or {@code target} is the current room)
+     */
+    public static List<Room> findPath(GameContext ctx, Room target) {
+        Room start = ctx.getPlayer().getCurrentRoom();
+        Set<String> visited = ctx.getPlayer().getVisitedRoomIds();
+
+        Queue<Room> queue = new ArrayDeque<>();
+        Map<Room, Room> cameFrom = new HashMap<>();
+        queue.add(start);
+        cameFrom.put(start, null);
+
+        while (!queue.isEmpty()) {
+            Room current = queue.poll();
+            if (current == target) {
+                return reconstruct(cameFrom, target);
+            }
+            for (Map.Entry<Direction, Room> exit : current.getExits().entrySet()) {
+                Room next = exit.getValue();
+                if (cameFrom.containsKey(next) || !visited.contains(next.getId())) {
+                    continue;
+                }
+                ExitLock lock = current.getExitLocks().get(exit.getKey());
+                if (lock != null && !Conditions.all(lock.requires(), ctx)) {
+                    continue;
+                }
+                if (!Light.isLit(ctx, next)) {
+                    continue;
+                }
+                cameFrom.put(next, current);
+                queue.add(next);
+            }
+        }
+        return List.of();
+    }
+
+    /** Walks predecessors back from target to start; returns steps after start. */
+    private static List<Room> reconstruct(Map<Room, Room> cameFrom, Room target) {
+        LinkedList<Room> path = new LinkedList<>();
+        for (Room r = target; r != null && cameFrom.get(r) != null; r = cameFrom.get(r)) {
+            path.addFirst(r);
+        }
+        return path;
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/QuestEngine.java

@@ -0,0 +1,95 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.io.text.QuestEntry;
+import thb.jeanluc.adventure.io.text.QuestView;
+import thb.jeanluc.adventure.io.text.StyledText;
+import thb.jeanluc.adventure.model.Quest;
+import thb.jeanluc.adventure.model.QuestStage;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+/** Per-turn quest progression and view building, driven by world conditions. */
+public final class QuestEngine {
+
+    private QuestEngine() {
+    }
+
+    public static void tick(GameContext ctx) {
+        Map<String, Quest> quests = ctx.getWorld().getQuests();
+        for (Quest q : quests.values()) {
+            if (q.autoStart() && !ctx.getQuestLog().isActive(q.id()) && !ctx.getQuestLog().isCompleted(q.id())) {
+                ctx.getQuestLog().start(q.id());
+            }
+        }
+        int guard = 0;
+        int max = totalStages(quests) + quests.size() + 1;
+        boolean changed = true;
+        while (changed && guard++ < max) {
+            changed = false;
+            for (String id : new ArrayList<>(ctx.getQuestLog().active())) {
+                Quest q = quests.get(id);
+                if (q == null) {
+                    continue;
+                }
+                int idx = ctx.getQuestLog().stageIndex(id);
+                if (idx >= q.stages().size()) {
+                    finish(ctx, q);
+                    changed = true;
+                    continue;
+                }
+                QuestStage stage = q.stages().get(idx);
+                if (Conditions.all(stage.completion(), ctx)) {
+                    Effects.applyAll(stage.onComplete(), ctx);
+                    ctx.getIo().print(StyledText.builder()
+                            .heading("✓ Objective complete: ").plain(stage.objective()).build());
+                    ctx.getQuestLog().advance(id);
+                    if (ctx.getQuestLog().stageIndex(id) >= q.stages().size()) {
+                        finish(ctx, q);
+                    }
+                    changed = true;
+                }
+            }
+        }
+    }
+
+    private static void finish(GameContext ctx, Quest q) {
+        if (ctx.getQuestLog().isCompleted(q.id())) {
+            return;
+        }
+        Effects.applyAll(q.onComplete(), ctx);
+        ctx.getQuestLog().complete(q.id());
+        ctx.getIo().print(StyledText.builder()
+                .heading("★ Quest complete: ").plain(q.title()).build());
+        ctx.save();
+    }
+
+    public static QuestView viewOf(GameContext ctx) {
+        Map<String, Quest> quests = ctx.getWorld().getQuests();
+        List<QuestEntry> active = new ArrayList<>();
+        for (String id : ctx.getQuestLog().active()) {
+            Quest q = quests.get(id);
+            if (q == null) {
+                continue;
+            }
+            int idx = ctx.getQuestLog().stageIndex(id);
+            String objective = idx < q.stages().size() ? q.stages().get(idx).objective() : "";
+            active.add(new QuestEntry(q.title(), objective));
+        }
+        List<String> completed = new ArrayList<>();
+        for (String id : ctx.getQuestLog().completed()) {
+            Quest q = quests.get(id);
+            completed.add(q == null ? id : q.title());
+        }
+        return new QuestView(active, completed);
+    }
+
+    private static int totalStages(Map<String, Quest> quests) {
+        int total = 0;
+        for (Quest q : quests.values()) {
+            total += q.stages().size();
+        }
+        return total;
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/QuestLog.java

@@ -0,0 +1,58 @@
+package thb.jeanluc.adventure.game;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Set;
+
+/** Runtime quest progress: current stage per active quest, plus completed ids. */
+public class QuestLog {
+
+    private final Map<String, Integer> stageIndex = new LinkedHashMap<>();
+    private final Set<String> completed = new LinkedHashSet<>();
+
+    public void start(String id) {
+        if (!completed.contains(id)) {
+            stageIndex.putIfAbsent(id, 0);
+        }
+    }
+
+    public boolean isActive(String id) {
+        return stageIndex.containsKey(id);
+    }
+
+    public boolean isCompleted(String id) {
+        return completed.contains(id);
+    }
+
+    public int stageIndex(String id) {
+        return stageIndex.getOrDefault(id, 0);
+    }
+
+    public void advance(String id) {
+        stageIndex.merge(id, 1, Integer::sum);
+    }
+
+    public void complete(String id) {
+        stageIndex.remove(id);
+        completed.add(id);
+    }
+
+    public Set<String> active() {
+        return Collections.unmodifiableSet(stageIndex.keySet());
+    }
+
+    public Set<String> completed() {
+        return Collections.unmodifiableSet(completed);
+    }
+
+    /** Replaces all progress with the given stage map and completed set (load). */
+    public void restore(Map<String, Integer> stages, Collection<String> completedIds) {
+        stageIndex.clear();
+        stageIndex.putAll(stages);
+        completed.clear();
+        completed.addAll(completedIds);
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/TutorialGuide.java

@@ -0,0 +1,123 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.command.Command;
+import thb.jeanluc.adventure.command.CommandRegistry;
+import thb.jeanluc.adventure.command.ParsedCommand;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.model.TutorialStep;
+
+import java.util.Optional;
+
+/**
+ * Drives the interactive start-of-game walkthrough, layered onto the real game
+ * loop. Prints an instruction, then on each executed command decides whether the
+ * current step is satisfied (confirm + advance) or not (hint). Movement steps
+ * require an actual room change. Alias-aware via the {@link CommandRegistry}.
+ */
+public final class TutorialGuide {
+
+    private final Tutorial tutorial;
+    private final CommandRegistry registry;
+    private int index;
+    private boolean active;
+    private boolean begun;
+    private Room roomAtStepStart;
+
+    public TutorialGuide(Tutorial tutorial, CommandRegistry registry) {
+        this.tutorial = tutorial;
+        this.registry = registry;
+        this.active = !tutorial.isEmpty();
+    }
+
+    /** @return true while the walkthrough is still running. */
+    public boolean isActive() {
+        return active;
+    }
+
+    /** Prints the intro and the first instruction (call once at loop start). */
+    public void begin(GameContext ctx) {
+        if (!active || begun) {
+            return;
+        }
+        begun = true;
+        if (tutorial.intro() != null && !tutorial.intro().isBlank()) {
+            ctx.getIo().write(tutorial.intro());
+        }
+        enterStep(ctx);
+    }
+
+    /** Evaluates the current step against the command that was just executed. */
+    public void onCommand(GameContext ctx, ParsedCommand parsed) {
+        if (!active) {
+            return;
+        }
+        TutorialStep step = tutorial.steps().get(index);
+        if (satisfies(step, ctx, parsed)) {
+            ctx.getIo().write(step.confirm());
+            index++;
+            if (index >= tutorial.steps().size()) {
+                if (tutorial.closingTips() != null && !tutorial.closingTips().isBlank()) {
+                    ctx.getIo().write(tutorial.closingTips());
+                }
+                active = false;
+            } else {
+                enterStep(ctx);
+            }
+        } else {
+            ctx.getIo().write(step.hint());
+        }
+    }
+
+    /** Ends the tutorial early (the 'skip' command). */
+    public void skip(GameContext ctx) {
+        if (active) {
+            ctx.getIo().write("Tutorial skipped.");
+            active = false;
+        }
+    }
+
+    private void enterStep(GameContext ctx) {
+        roomAtStepStart = ctx.getPlayer().getCurrentRoom();
+        ctx.getIo().write(tutorial.steps().get(index).instruction());
+    }
+
+    private boolean satisfies(TutorialStep step, GameContext ctx, ParsedCommand parsed) {
+        String expect = step.expect();
+        if ("go_direction".equals(expect)) {
+            return isGo(parsed) && firstIsDirection(parsed) && moved(ctx);
+        }
+        if ("go_to_room".equals(expect)) {
+            return isGo(parsed) && !firstIsDirection(parsed) && moved(ctx);
+        }
+        return sameCommand(parsed.verb(), expect) && parsed.args().size() >= step.minArgs();
+    }
+
+    private boolean isGo(ParsedCommand p) {
+        return sameCommand(p.verb(), "go") && !p.args().isEmpty();
+    }
+
+    private boolean firstIsDirection(ParsedCommand p) {
+        if (p.args().isEmpty()) {
+            return false;
+        }
+        try {
+            Direction.fromString(p.args().get(0));
+            return true;
+        } catch (IllegalArgumentException e) {
+            return false;
+        }
+    }
+
+    private boolean moved(GameContext ctx) {
+        return roomAtStepStart != null
+                && ctx.getPlayer().getCurrentRoom() != roomAtStepStart;
+    }
+
+    private boolean sameCommand(String a, String b) {
+        Optional<Command> ca = registry.find(a);
+        Optional<Command> cb = registry.find(b);
+        return ca.isPresent() && cb.isPresent() && ca.get() == cb.get();
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/ConsoleIO.java

@@ -1,41 +1,69 @@
 package thb.jeanluc.adventure.io;
 
+import thb.jeanluc.adventure.io.text.AsciiMap;
+import thb.jeanluc.adventure.io.text.Hud;
+import thb.jeanluc.adventure.io.text.MapView;
+import thb.jeanluc.adventure.io.text.RoomView;
+import thb.jeanluc.adventure.io.text.Span;
+import thb.jeanluc.adventure.io.text.Style;
+import thb.jeanluc.adventure.io.text.StyledText;
+
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.PrintStream;
 import java.nio.charset.StandardCharsets;
+import java.util.List;
 
 /**
- * {@link GameIO} backed by {@code System.in} and {@code System.out}.
+ * {@link GameIO} for the terminal: ANSI colours, box-drawing room frames
- * Each {@code write} appends a newline so output blocks are visually
+ * (level "B"), and a dim HUD line. Colour and glyph fidelity are configurable
- * separated. {@code readLine} prints a {@code > } prompt before
+ * and degrade safely (no colours when output is piped; ASCII frames on request).
- * blocking.
  */
 public class ConsoleIO implements GameIO {
 
-    /** Input source. */
+    /** Whether ANSI colour is emitted. */
+    public enum ColorMode { ON, OFF, AUTO }
+
+    /** Frame/glyph fidelity tier. */
+    public enum GlyphMode { ASCII, UNICODE, GLYPH }
+
+    private static final int FRAME_WIDTH = 44;
+
     private final BufferedReader in;
-
-    /** Output sink. */
     private final PrintStream out;
+    private boolean useColor;
+    private GlyphMode glyphs;
 
-    /**
-     * Creates a console IO using standard input and output.
-     */
     public ConsoleIO() {
-        this(new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8)), System.out);
+        this(new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8)),
+                System.out, ColorMode.AUTO, GlyphMode.UNICODE);
     }
 
-    /**
+    /** Backward-compatible stream constructor (colour off, unicode frames). */
-     * Test-friendly constructor allowing custom streams.
-     *
-     * @param in  reader to consume player input
-     * @param out stream to write player output
-     */
     public ConsoleIO(BufferedReader in, PrintStream out) {
+        this(in, out, ColorMode.OFF, GlyphMode.UNICODE);
+    }
+
+    public ConsoleIO(BufferedReader in, PrintStream out, ColorMode colorMode, GlyphMode glyphs) {
         this.in = in;
         this.out = out;
+        this.glyphs = glyphs;
+        setColorMode(colorMode);
+    }
+
+    /** Re-resolves colour emission from the given mode (AUTO checks the console). */
+    public void setColorMode(ColorMode mode) {
+        this.useColor = switch (mode) {
+            case ON -> true;
+            case OFF -> false;
+            case AUTO -> System.console() != null;
+        };
+    }
+
+    /** Switches the frame/glyph fidelity tier live. */
+    public void setGlyphMode(GlyphMode mode) {
+        this.glyphs = mode;
     }
 
     @Override
@@ -43,15 +71,100 @@ public class ConsoleIO implements GameIO {
         out.print("> ");
         out.flush();
         try {
-            String line = in.readLine();
+            // null propagates as true EOF (ends the game loop); "" stays "" (blank input re-prompts).
-            return line == null ? "" : line;
+            return in.readLine();
         } catch (IOException e) {
-            return "";
+            // Treat a stream failure as EOF so input ends cleanly rather than spinning.
+            return null;
         }
     }
 
     @Override
-    public void write(String s) {
+    public void print(StyledText text) {
-        out.println(s);
+        StringBuilder sb = new StringBuilder();
+        for (Span s : text.spans()) {
+            sb.append(paint(s.style(), s.text()));
+        }
+        out.println(sb);
+    }
+
+    @Override
+    public void showRoom(RoomView room) {
+        out.println(paint(Style.HEADING, frameTop(room.name())));
+        out.println(room.description().stripTrailing());
+        if (!room.items().isEmpty()) {
+            out.println(section("Items", room.items(), Style.ITEM));
+        }
+        if (!room.npcs().isEmpty()) {
+            out.println(section("People", room.npcs(), Style.NPC));
+        }
+        if (!room.exits().isEmpty()) {
+            out.println(section("Exits", room.exits(), Style.EXIT));
+        } else {
+            out.println("  " + paint(Style.DIM, "no obvious exits"));
+        }
+        out.println(paint(Style.HEADING, frameBottom()));
+    }
+
+    @Override
+    public void setHud(Hud h) {
+        String line = "[ " + h.location() + " · " + h.gold() + " gold · turn " + h.turn()
+                + " · light: " + (h.lightOn() ? "on" : "off") + " ]";
+        out.println(paint(Style.DIM, line));
+    }
+
+    @Override
+    public void showMap(MapView view) {
+        print(AsciiMap.render(view, glyphs != GlyphMode.ASCII));
+    }
+
+    private String section(String label, List<String> xs, Style st) {
+        StringBuilder sb = new StringBuilder("  ").append(paint(Style.DIM, label)).append("  ");
+        for (int i = 0; i < xs.size(); i++) {
+            if (i > 0) {
+                sb.append(" · ");
+            }
+            sb.append(paint(st, xs.get(i)));
+        }
+        return sb.toString();
+    }
+
+    private String frameTop(String title) {
+        String tl = glyphs == GlyphMode.ASCII ? "+" : "┌";
+        String tr = glyphs == GlyphMode.ASCII ? "+" : "┐";
+        String h = glyphs == GlyphMode.ASCII ? "-" : "─";
+        StringBuilder sb = new StringBuilder(tl).append(h).append(' ')
+                .append(title.toUpperCase()).append(' ');
+        while (sb.length() < FRAME_WIDTH - 1) {
+            sb.append(h);
+        }
+        return sb.append(tr).toString();
+    }
+
+    private String frameBottom() {
+        String bl = glyphs == GlyphMode.ASCII ? "+" : "└";
+        String br = glyphs == GlyphMode.ASCII ? "+" : "┘";
+        String h = glyphs == GlyphMode.ASCII ? "-" : "─";
+        StringBuilder sb = new StringBuilder(bl);
+        while (sb.length() < FRAME_WIDTH - 1) {
+            sb.append(h);
+        }
+        return sb.append(br).toString();
+    }
+
+    private String paint(Style st, String s) {
+        if (!useColor) {
+            return s;
+        }
+        String code = switch (st) {
+            case HEADING -> "";
+            case ITEM -> "";
+            case NPC -> "";
+            case EXIT -> "";
+            case DANGER -> "";
+            case DIM -> "";
+            case PLAIN -> "";
+        };
+        return code.isEmpty() ? s : code + s + "";
     }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/GameIO.java

@@ -1,24 +1,116 @@
 package thb.jeanluc.adventure.io;
 
+import thb.jeanluc.adventure.io.text.AsciiMap;
+import thb.jeanluc.adventure.io.text.Hud;
+import thb.jeanluc.adventure.io.text.MapView;
+import thb.jeanluc.adventure.io.text.QuestText;
+import thb.jeanluc.adventure.io.text.QuestView;
+import thb.jeanluc.adventure.io.text.Renderings;
+import thb.jeanluc.adventure.io.text.RoomView;
+import thb.jeanluc.adventure.io.text.StyledText;
+
+import java.util.List;
+
 /**
- * Bidirectional text channel between the engine and the player. Implemented
+ * Bidirectional channel between the engine and the player. Commands emit
- * by both {@code ConsoleIO} and {@code SwingIO} so the game loop is agnostic
+ * semantic, role-styled output via {@link #print(StyledText)} (the primitive)
- * to the actual interface.
+ * and the {@link #showRoom}/{@link #setHud} views; each frontend renders them.
  */
 public interface GameIO {
 
-    /**
+    /** Blocks until a line of input is available; empty string at end of input. */
-     * Blocks until a line of input is available.
-     *
-     * @return the next user input line, or an empty string at end of input
-     */
     String readLine();
 
-    /**
+    /** Renders one styled output block. The only method implementors must provide. */
-     * Writes a message to the player. Each call corresponds to one logical
+    void print(StyledText text);
-     * output block; the implementation handles line breaks at the boundary.
+
-     *
+    /** Convenience: a plain, unstyled line. */
-     * @param s message text; must not be null
+    default void write(String s) {
-     */
+        print(StyledText.of(s));
-    void write(String s);
+    }
+
+    /** Renders a room. Default flattens via {@link Renderings}; renderers may override. */
+    default void showRoom(RoomView room) {
+        print(Renderings.roomToStyledText(room));
+    }
+
+    /** Updates the status/HUD region. No-op by default; renderers may override. */
+    default void setHud(Hud hud) {
+        // no-op
+    }
+
+    /** Per-turn push of the current map. GUI repaints its panel; console ignores. */
+    default void setMap(MapView view) {
+        // no-op
+    }
+
+    /**
+     * One frame of an auto-walk (the {@code go to} command), as the player moves
+     * through a room en route. Default is a no-op: text mode travels silently.
+     * The GUI overrides this to repaint the map and pace the animation.
+     *
+     * @param view the map snapshot at this step
+     */
+    default void travelStep(MapView view) {
+        // no animation in text mode
+    }
+
+    /** On-demand map (the 'map' command). Default renders ASCII (Unicode frames). */
+    default void showMap(MapView view) {
+        print(AsciiMap.render(view, true));
+    }
+
+    /** Per-turn push of the quest log. GUI repaints its box; console ignores. */
+    default void setQuests(QuestView view) {
+        // no-op
+    }
+
+    /** Per-turn current-room music track; null/blank = silence. Console no-op; GUI plays. */
+    default void setMusic(String track) {
+        // no audio in text mode
+    }
+
+    /** Applies the music volume/level. Console no-op; GUI sets it. */
+    default void setMusicLevel(MusicLevel level) {
+        // no audio in text mode
+    }
+
+    /** On-demand quest log (the 'quests' command). Default renders styled text. */
+    default void showQuests(QuestView view) {
+        print(QuestText.render(view));
+    }
+
+    /**
+     * Presents a titled list of options and returns the 0-based index of the
+     * player's choice. Default (console) prints a numbered list and reads a
+     * number, re-prompting on invalid input. EOF / empty input returns the
+     * LAST option (menus place the safe/cancel option last). Frontends with
+     * native widgets (e.g. buttons) may override.
+     *
+     * @param title   heading shown above the options
+     * @param options non-empty list of option labels
+     * @return 0-based index into {@code options}
+     */
+    default int choose(String title, List<String> options) {
+        StyledText.Builder b = StyledText.builder().heading(title).plain("\n");
+        for (int i = 0; i < options.size(); i++) {
+            b.plain("  " + (i + 1) + ") " + options.get(i) + "\n");
+        }
+        print(b.build());
+        while (true) {
+            String line = readLine();
+            if (line == null || line.isBlank()) {
+                return options.size() - 1;
+            }
+            try {
+                int n = Integer.parseInt(line.trim());
+                if (n >= 1 && n <= options.size()) {
+                    return n - 1;
+                }
+            } catch (NumberFormatException ignored) {
+                // fall through to re-prompt
+            }
+            write("Please enter a number between 1 and " + options.size() + ".");
+        }
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/MapPanel.java

@@ -0,0 +1,204 @@
+package thb.jeanluc.adventure.io;
+
+import thb.jeanluc.adventure.io.text.CellState;
+import thb.jeanluc.adventure.io.text.Connection;
+import thb.jeanluc.adventure.io.text.MapView;
+import thb.jeanluc.adventure.io.text.RoomCell;
+
+import javax.swing.JComponent;
+import javax.swing.JScrollPane;
+import javax.swing.JViewport;
+import javax.swing.SwingUtilities;
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Insets;
+import java.awt.RenderingHints;
+import java.awt.Stroke;
+import java.util.List;
+
+/**
+ * Draws a {@link MapView} as outlined rooms linked by corridors (Graphics2D).
+ *
+ * <p>The map is scaled to <em>fit</em> the side panel, so it never needs
+ * scrollbars at normal zoom and re-fits whenever the window (and thus the
+ * panel) is resized. The {@link #setZoom(float) zoom} from {@code Ctrl +/-}
+ * multiplies on top of the fit scale (zoom &gt; 1 enlarges and may scroll).</p>
+ */
+public class MapPanel extends JComponent {
+
+    private static final int BASE_CELL_W = 96;
+    private static final int BASE_CELL_H = 46;
+    private static final int BASE_GAP_X = 34;
+    private static final int BASE_GAP_Y = 30;
+    private static final int BASE_PAD = 16;
+    private static final float BASE_FONT = 11f;
+
+    private static final Color BG = new Color(0x0e, 0x12, 0x18);
+    private static final Color CORRIDOR = new Color(0x46, 0x70, 0x8a);
+    private static final Color VISITED = new Color(0xcf, 0xd6, 0xe0);
+    private static final Color CURRENT = new Color(0xe6, 0xc3, 0x4a);
+    private static final Color KNOWN = new Color(0x3a, 0x46, 0x55);
+
+    private final Font baseFont;
+    private float zoom = 1f;
+    private MapView view = new MapView(List.of(), List.of());
+
+    public MapPanel(Font font) {
+        this.baseFont = font;
+        setBackground(BG);
+        setOpaque(true);
+    }
+
+    /** Sets the user zoom multiplier (applied on top of the fit-to-panel scale). */
+    public void setZoom(float zoom) {
+        SwingUtilities.invokeLater(() -> {
+            this.zoom = Math.max(0.4f, zoom);
+            revalidate();
+            repaint();
+        });
+    }
+
+    /** Replaces the rendered map. */
+    public void show(MapView v) {
+        SwingUtilities.invokeLater(() -> {
+            this.view = v;
+            revalidate();
+            repaint();
+        });
+    }
+
+    /** The space the map should fit into: the enclosing scroll pane's viewport area. */
+    private Dimension available() {
+        Container p = getParent();
+        if (p instanceof JViewport && p.getParent() instanceof JScrollPane sp) {
+            Insets in = sp.getInsets();
+            int w = sp.getWidth() - in.left - in.right;
+            int h = sp.getHeight() - in.top - in.bottom;
+            if (w > 0 && h > 0) {
+                return new Dimension(w, h);
+            }
+        }
+        Dimension s = getSize();
+        return (s.width > 0 && s.height > 0) ? s : new Dimension(220, 320);
+    }
+
+    private int[] gridBounds() {
+        int maxX = 0;
+        int maxY = 0;
+        for (RoomCell c : view.cells()) {
+            maxX = Math.max(maxX, c.x());
+            maxY = Math.max(maxY, c.y());
+        }
+        return new int[]{maxX, maxY};
+    }
+
+    /** Fit-to-panel scale times the user zoom. */
+    private float effScale(Dimension avail, int[] b) {
+        double natW = 2.0 * BASE_PAD + (b[0] + 1) * BASE_CELL_W + b[0] * BASE_GAP_X;
+        double natH = 2.0 * BASE_PAD + (b[1] + 1) * BASE_CELL_H + b[1] * BASE_GAP_Y;
+        if (natW <= 0 || natH <= 0) {
+            return zoom;
+        }
+        double fit = Math.min(avail.width / natW, avail.height / natH);
+        fit = Math.max(0.3, Math.min(3.0, fit));
+        return (float) (fit * zoom);
+    }
+
+    private Dimension content(float eff, int[] b) {
+        int pad = Math.round(BASE_PAD * eff);
+        int cw = Math.round(BASE_CELL_W * eff);
+        int ch = Math.round(BASE_CELL_H * eff);
+        int gx = Math.round(BASE_GAP_X * eff);
+        int gy = Math.round(BASE_GAP_Y * eff);
+        return new Dimension(pad * 2 + (b[0] + 1) * cw + b[0] * gx,
+                pad * 2 + (b[1] + 1) * ch + b[1] * gy);
+    }
+
+    @Override
+    public Dimension getPreferredSize() {
+        if (view.cells().isEmpty()) {
+            return available();
+        }
+        Dimension avail = available();
+        int[] b = gridBounds();
+        Dimension c = content(effScale(avail, b), b);
+        // Fill the viewport when the map is smaller; allow growth (scroll) when zoomed in.
+        return new Dimension(Math.max(c.width, avail.width), Math.max(c.height, avail.height));
+    }
+
+    @Override
+    protected void paintComponent(Graphics g0) {
+        Graphics2D g = (Graphics2D) g0.create();
+        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g.setColor(BG);
+        g.fillRect(0, 0, getWidth(), getHeight());
+        if (view.cells().isEmpty()) {
+            g.dispose();
+            return;
+        }
+
+        int[] b = gridBounds();
+        float eff = effScale(available(), b);
+        g.setFont(baseFont.deriveFont(BASE_FONT * eff));
+
+        int cellW = Math.round(BASE_CELL_W * eff);
+        int cellH = Math.round(BASE_CELL_H * eff);
+        int gapX = Math.round(BASE_GAP_X * eff);
+        int gapY = Math.round(BASE_GAP_Y * eff);
+        int pad = Math.round(BASE_PAD * eff);
+        int arc = Math.round(12 * eff);
+
+        Dimension c = content(eff, b);
+        int offX = Math.max(0, (getWidth() - c.width) / 2);
+        int offY = Math.max(0, (getHeight() - c.height) / 2);
+
+        Stroke solid = new BasicStroke(2f * eff);
+        Stroke dashed = new BasicStroke(1.5f * eff, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER,
+                10f, new float[]{4f * eff, 3f * eff}, 0f);
+
+        // corridors first
+        for (Connection cn : view.connections()) {
+            boolean known = cn.from().state() == CellState.KNOWN || cn.to().state() == CellState.KNOWN;
+            g.setStroke(known ? dashed : solid);
+            g.setColor(known ? KNOWN : CORRIDOR);
+            int x1 = offX + pad + cn.from().x() * (cellW + gapX) + cellW / 2;
+            int y1 = offY + pad + cn.from().y() * (cellH + gapY) + cellH / 2;
+            int x2 = offX + pad + cn.to().x() * (cellW + gapX) + cellW / 2;
+            int y2 = offY + pad + cn.to().y() * (cellH + gapY) + cellH / 2;
+            g.drawLine(x1, y1, x2, y2);
+        }
+
+        // rooms on top
+        for (RoomCell cell : view.cells()) {
+            int x = offX + pad + cell.x() * (cellW + gapX);
+            int y = offY + pad + cell.y() * (cellH + gapY);
+            Color stroke = switch (cell.state()) {
+                case CURRENT -> CURRENT;
+                case VISITED -> VISITED;
+                case KNOWN -> KNOWN;
+            };
+            g.setColor(cell.state() == CellState.CURRENT
+                    ? new Color(0x27, 0x21, 0x10)
+                    : new Color(0x11, 0x16, 0x1f));
+            g.fillRoundRect(x, y, cellW, cellH, arc, arc);
+
+            g.setStroke(cell.state() == CellState.KNOWN
+                    ? dashed
+                    : new BasicStroke((cell.state() == CellState.CURRENT ? 2.5f : 1.5f) * eff));
+            g.setColor(stroke);
+            g.drawRoundRect(x, y, cellW, cellH, arc, arc);
+
+            String label = cell.state() == CellState.KNOWN ? "?" : cell.name();
+            int tw = g.getFontMetrics().stringWidth(label);
+            int ascent = g.getFontMetrics().getAscent();
+            g.setColor(cell.state() == CellState.KNOWN ? KNOWN.brighter() : stroke);
+            g.drawString(label, x + (cellW - tw) / 2, y + (cellH + ascent) / 2 - 2);
+        }
+        g.dispose();
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/MusicBackend.java

@@ -0,0 +1,17 @@
+package thb.jeanluc.adventure.io;
+
+/** Raw audio operations — the only part that touches sound hardware. */
+public interface MusicBackend {
+
+    /** Fade the current track out, then start {@code track} (looping) and fade in to {@code gainDb}. */
+    void fadeTo(String track, float gainDb);
+
+    /** Fade the current track out and stop. */
+    void fadeOut();
+
+    /** Set the playback volume immediately. */
+    void setGainDb(float gainDb);
+
+    /** Stop playback and release resources. */
+    void shutdown();
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/MusicController.java

@@ -0,0 +1,55 @@
+package thb.jeanluc.adventure.io;
+
+import java.util.Objects;
+
+/**
+ * Frontend-agnostic music decision logic. Idempotent per track (never restarts
+ * the same track), fades to silence on a null/blank track, and honours the
+ * {@link MusicLevel} (OFF disables playback). Delegates raw operations to a
+ * {@link MusicBackend}.
+ */
+public final class MusicController {
+
+    private final MusicBackend backend;
+    private MusicLevel level = MusicLevel.MEDIUM;
+    private String current; // currently selected track, or null = silence
+
+    public MusicController(MusicBackend backend) {
+        this.backend = backend;
+    }
+
+    /** Called per turn with the current room's music field (may be null/blank). */
+    public void room(String track) {
+        if (!level.isOn()) {
+            return;
+        }
+        String next = (track == null || track.isBlank()) ? null : track;
+        if (Objects.equals(next, current)) {
+            return;
+        }
+        current = next;
+        if (next == null) {
+            backend.fadeOut();
+        } else {
+            backend.fadeTo(next, level.gainDb());
+        }
+    }
+
+    /** Applies a new music level (volume / off). */
+    public void level(MusicLevel newLevel) {
+        if (newLevel == this.level) {
+            return;
+        }
+        this.level = newLevel;
+        if (!newLevel.isOn()) {
+            backend.fadeOut();
+            current = null; // turning back on replays on the next room() call
+        } else {
+            backend.setGainDb(newLevel.gainDb());
+        }
+    }
+
+    public void shutdown() {
+        backend.shutdown();
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/MusicLevel.java

@@ -0,0 +1,26 @@
+package thb.jeanluc.adventure.io;
+
+/** Background-music volume level, cycled in the Settings menu. */
+public enum MusicLevel {
+    OFF, LOW, MEDIUM, HIGH;
+
+    /** Target MASTER_GAIN in decibels. Irrelevant for {@link #OFF} (playback disabled). */
+    public float gainDb() {
+        return switch (this) {
+            case OFF -> Float.NEGATIVE_INFINITY;
+            case LOW -> -20f;
+            case MEDIUM -> -10f;
+            case HIGH -> 0f;
+        };
+    }
+
+    /** @return true when music should play. */
+    public boolean isOn() {
+        return this != OFF;
+    }
+
+    /** Next level in the cycle (wraps HIGH → OFF). */
+    public MusicLevel next() {
+        return values()[(ordinal() + 1) % values().length];
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/OggMusicBackend.java

@@ -0,0 +1,155 @@
+package thb.jeanluc.adventure.io;
+
+import lombok.extern.slf4j.Slf4j;
+
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.FloatControl;
+import javax.sound.sampled.SourceDataLine;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+/**
+ * Streams OGG Vorbis tracks from the external {@code music/} folder through a
+ * {@link SourceDataLine}, looping, with ~400 ms gain fades. Decoding uses the
+ * vorbisspi/jorbis {@code javax.sound} SPI. All playback runs on a daemon
+ * thread; missing/undecodable files are logged and stay silent. GUI-only —
+ * verified manually.
+ */
+@Slf4j
+public final class OggMusicBackend implements MusicBackend {
+
+    private static final String MUSIC_DIR = "music";
+    private static final int FADE_MS = 400;
+    private static final int FADE_STEPS = 20;
+    private static final int BUFFER = 4096;
+    private static final float FLOOR_DB = -40f; // near-silence for fades
+
+    private volatile Thread playThread;
+    private volatile boolean stopping;
+    private volatile SourceDataLine line;
+    private volatile float targetGainDb = MusicLevel.MEDIUM.gainDb();
+
+    @Override
+    public synchronized void fadeTo(String track, float gainDb) {
+        stopCurrent();
+        targetGainDb = gainDb;
+        Path file = Path.of(MUSIC_DIR, track);
+        if (!Files.isReadable(file)) {
+            log.warn("Music file not found, staying silent: {}", file);
+            return;
+        }
+        stopping = false;
+        playThread = new Thread(() -> playLoop(file, gainDb), "music");
+        playThread.setDaemon(true);
+        playThread.start();
+    }
+
+    @Override
+    public synchronized void fadeOut() {
+        stopCurrent();
+    }
+
+    @Override
+    public synchronized void setGainDb(float gainDb) {
+        targetGainDb = gainDb;
+        SourceDataLine l = line;
+        if (l != null) {
+            applyGain(l, gainDb);
+        }
+    }
+
+    @Override
+    public synchronized void shutdown() {
+        stopCurrent();
+    }
+
+    /** Signals the play thread to stop and waits for its fade-out + cleanup. */
+    private void stopCurrent() {
+        Thread t = playThread;
+        if (t == null) {
+            return;
+        }
+        stopping = true;
+        try {
+            t.join(FADE_MS + 600L);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+        playThread = null;
+    }
+
+    private void playLoop(Path file, float gainDb) {
+        SourceDataLine l = null;
+        try {
+            while (!stopping) {
+                try (AudioInputStream in = AudioSystem.getAudioInputStream(file.toFile())) {
+                    AudioFormat base = in.getFormat();
+                    AudioFormat pcm = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
+                            base.getSampleRate(), 16, base.getChannels(),
+                            base.getChannels() * 2, base.getSampleRate(), false);
+                    try (AudioInputStream din = AudioSystem.getAudioInputStream(pcm, in)) {
+                        if (l == null) {
+                            l = AudioSystem.getSourceDataLine(pcm);
+                            l.open(pcm);
+                            l.start();
+                            line = l;
+                            ramp(l, FLOOR_DB, gainDb); // fade in once
+                        }
+                        byte[] buf = new byte[BUFFER];
+                        int n;
+                        while (!stopping && (n = din.read(buf, 0, buf.length)) != -1) {
+                            l.write(buf, 0, n);
+                        }
+                    }
+                }
+            }
+        } catch (Exception e) {
+            log.warn("Music playback failed for {}: {}", file, e.getMessage());
+        } finally {
+            if (l != null) {
+                try {
+                    ramp(l, currentGain(l), FLOOR_DB); // fade out
+                } catch (RuntimeException ignored) {
+                    // best-effort fade
+                }
+                l.stop();
+                l.close();
+            }
+            line = null;
+        }
+    }
+
+    private void ramp(SourceDataLine l, float fromDb, float toDb) {
+        for (int i = 0; i <= FADE_STEPS; i++) {
+            applyGain(l, fromDb + (toDb - fromDb) * i / FADE_STEPS);
+            sleep(FADE_MS / FADE_STEPS);
+        }
+    }
+
+    private float currentGain(SourceDataLine l) {
+        try {
+            return ((FloatControl) l.getControl(FloatControl.Type.MASTER_GAIN)).getValue();
+        } catch (IllegalArgumentException e) {
+            return targetGainDb;
+        }
+    }
+
+    private void applyGain(SourceDataLine l, float db) {
+        try {
+            FloatControl gain = (FloatControl) l.getControl(FloatControl.Type.MASTER_GAIN);
+            gain.setValue(Math.max(gain.getMinimum(), Math.min(gain.getMaximum(), db)));
+        } catch (IllegalArgumentException ignored) {
+            // line has no master-gain control on this platform
+        }
+    }
+
+    private void sleep(long ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/QuestPanel.java

@@ -0,0 +1,60 @@
+package thb.jeanluc.adventure.io;
+
+import thb.jeanluc.adventure.io.text.QuestText;
+import thb.jeanluc.adventure.io.text.QuestView;
+import thb.jeanluc.adventure.io.text.Span;
+import thb.jeanluc.adventure.io.text.Style;
+
+import javax.swing.JTextPane;
+import javax.swing.SwingUtilities;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyledDocument;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Insets;
+
+/** Read-only styled view of the quest log, shown under the map. */
+public class QuestPanel extends JTextPane {
+
+    public QuestPanel(Font font) {
+        setEditable(false);
+        setBackground(new Color(0x0b, 0x0e, 0x13));
+        setForeground(new Color(0xcf, 0xd6, 0xe0));
+        setFont(font.deriveFont(12f));
+        setMargin(new Insets(8, 10, 8, 10));
+    }
+
+    public void show(QuestView view) {
+        SwingUtilities.invokeLater(() -> {
+            StyledDocument doc = getStyledDocument();
+            try {
+                doc.remove(0, doc.getLength());
+                for (Span sp : QuestText.render(view).spans()) {
+                    SimpleAttributeSet as = new SimpleAttributeSet();
+                    StyleConstants.setForeground(as, colorFor(sp.style()));
+                    if (sp.style() == Style.HEADING) {
+                        StyleConstants.setBold(as, true);
+                    }
+                    doc.insertString(doc.getLength(), sp.text(), as);
+                }
+                setCaretPosition(0);
+            } catch (BadLocationException ignored) {
+                // replace-only; cannot occur with getLength()
+            }
+        });
+    }
+
+    private Color colorFor(Style s) {
+        return switch (s) {
+            case HEADING -> new Color(0xc9, 0x8a, 0xe0);
+            case ITEM -> new Color(0x46, 0xc8, 0xd8);
+            case NPC -> new Color(0xe6, 0xc3, 0x4a);
+            case EXIT -> new Color(0x6f, 0xcf, 0x73);
+            case DANGER -> new Color(0xe0, 0x6c, 0x6c);
+            case DIM -> new Color(0x6b, 0x72, 0x80);
+            case PLAIN -> new Color(0xcf, 0xd6, 0xe0);
+        };
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/SwingIO.java

@@ -1,73 +1,297 @@
 package thb.jeanluc.adventure.io;
 
+import thb.jeanluc.adventure.io.text.Hud;
+import thb.jeanluc.adventure.io.text.MapView;
+import thb.jeanluc.adventure.io.text.QuestView;
+import thb.jeanluc.adventure.io.text.RoomView;
+import thb.jeanluc.adventure.io.text.Span;
+import thb.jeanluc.adventure.io.text.Style;
+import thb.jeanluc.adventure.io.text.StyledText;
+
+import javax.swing.AbstractAction;
 import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JComponent;
 import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
 import javax.swing.JScrollPane;
-import javax.swing.JTextArea;
 import javax.swing.JTextField;
+import javax.swing.JTextPane;
+import javax.swing.KeyStroke;
+import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyledDocument;
 import java.awt.BorderLayout;
 import java.awt.Color;
+import java.awt.Component;
+import java.awt.Cursor;
+import java.awt.Dimension;
 import java.awt.Font;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsEnvironment;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.awt.Toolkit;
+import java.awt.event.ActionEvent;
+import java.awt.event.ComponentAdapter;
+import java.awt.event.ComponentEvent;
+import java.awt.event.KeyEvent;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.LinkedBlockingQueue;
 
 /**
- * {@link GameIO} backed by a Swing window. A read-only output area shows
+ * {@link GameIO} backed by a Swing window with four regions: a HUD bar (top),
- * game text; a bottom text field collects player input. The input from
+ * a styled output pane (centre), a side panel for exits / future map (right),
- * the EDT is handed to the (worker-thread) game loop through a
+ * and an input field (bottom). A bundled TrueType font is loaded if present so
- * {@link LinkedBlockingQueue}.
+ * colours and glyphs work without the player installing anything.
+ *
+ * <p>Font sizes are multiplied by a detected display scale (HiDPI) and by a
+ * user-adjustable zoom ({@code Ctrl +} / {@code Ctrl -} / {@code Ctrl 0}), so
+ * text stays readable on high-DPI laptops even when the JVM does not pick up
+ * the desktop scaling factor.</p>
  */
 public class SwingIO implements GameIO {
 
-    /** Bridge between the EDT and the game loop. One element = one line. */
+    /** Unscaled base size for the main output/input font, in points. */
+    private static final float BASE_SIZE = 15f;
+
+    /** Unscaled size for the HUD and side-panel font, in points. */
+    private static final float SMALL_SIZE = 12.5f;
+
+    /** Delay between rooms while animating a go-to auto-walk, in milliseconds. */
+    private static final long TRAVEL_STEP_MS = 300L;
+
+    /** Side-panel width as a fraction of the window width, clamped by the bounds below. */
+    private static final double SIDE_RATIO = 0.28;
+    private static final int SIDE_MIN = 180;
+    private static final int SIDE_MAX = 460;
+
+    private final MusicController music = new MusicController(new OggMusicBackend());
     private final LinkedBlockingQueue<String> inputs = new LinkedBlockingQueue<>();
-
-    /** Main window. */
     private final JFrame frame;
-
+    private final JTextPane output;
-    /** Output text area; appended to from any thread via {@link SwingUtilities#invokeLater}. */
+    private final StyledDocument doc;
-    private final JTextArea output;
-
-    /** Input text field; ENTER pushes the line into {@link #inputs}. */
     private final JTextField input;
+    private final JLabel hud;
+    private final MapPanel map;
+    private final JScrollPane sideScroll;
+    private final QuestPanel quests;
+    private final JScrollPane questScroll;
+    private final JPanel sidePanel;
+    private final Font baseFont;
+
+    /** Detected display scale (≥ 1.0); HiDPI panels report > 1.0 where supported. */
+    private final float uiScale;
+
+    /** User zoom multiplier, adjusted live via keyboard. */
+    private float zoom = 1f;
 
-    /**
-     * Creates and shows the window with the given title. Must be called on
-     * the EDT (typical pattern: from {@code SwingUtilities.invokeLater}).
-     *
-     * @param title window title
-     */
     public SwingIO(String title) {
-        frame = new JFrame(title);
+        baseFont = loadFont();
-        output = new JTextArea();
+        uiScale = detectScale();
-        input = new JTextField();
 
+        output = new JTextPane();
         output.setEditable(false);
-        output.setLineWrap(true);
+        output.setBackground(new Color(0x0b, 0x0e, 0x13));
-        output.setWrapStyleWord(true);
+        output.setForeground(new Color(0xcf, 0xd6, 0xe0));
-        output.setBackground(Color.BLACK);
+        output.setMargin(new Insets(8, 8, 8, 8));
-        output.setForeground(Color.LIGHT_GRAY);
+        doc = output.getStyledDocument();
-        output.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 14));
-        output.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
 
-        input.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 14));
+        hud = new JLabel(" ");
+        hud.setOpaque(true);
+        hud.setBackground(new Color(0x11, 0x15, 0x1c));
+        hud.setForeground(new Color(0x8b, 0x94, 0xa3));
+        hud.setBorder(BorderFactory.createEmptyBorder(6, 12, 6, 12));
+
+        map = new MapPanel(baseFont);
+        sideScroll = new JScrollPane(map);
+        sideScroll.getViewport().setBackground(new Color(0x0e, 0x12, 0x18));
+
+        quests = new QuestPanel(baseFont);
+        questScroll = new JScrollPane(quests);
+        questScroll.setBorder(BorderFactory.createMatteBorder(1, 0, 0, 0, new Color(0x2a, 0x2f, 0x3a)));
+
+        sidePanel = new JPanel(new BorderLayout());
+        sidePanel.add(sideScroll, BorderLayout.CENTER);
+        sidePanel.add(questScroll, BorderLayout.SOUTH);
+
+        input = new JTextField();
         input.addActionListener(e -> {
             String line = input.getText();
             input.setText("");
-            output.append("> " + line + "\n");
+            appendSpans(List.of(new Span("> " + line + "\n", Style.DIM)));
             inputs.offer(line);
         });
 
+        frame = new JFrame(title);
         frame.setLayout(new BorderLayout());
+        frame.add(hud, BorderLayout.NORTH);
         frame.add(new JScrollPane(output), BorderLayout.CENTER);
+        frame.add(sidePanel, BorderLayout.EAST);
         frame.add(input, BorderLayout.SOUTH);
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-        frame.setSize(800, 600);
+        frame.setSize((int) (900 * uiScale), (int) (600 * uiScale));
         frame.setLocationRelativeTo(null);
+        frame.addComponentListener(new ComponentAdapter() {
+            @Override
+            public void componentResized(ComponentEvent e) {
+                updateSideWidth();
+                applyFonts();
+                rescaleMenuOverlayIfVisible();
+            }
+        });
+
+        installZoomKeys();
+        applyFonts();
+        updateSideWidth();
+
         frame.setVisible(true);
         input.requestFocusInWindow();
     }
 
+    /** Loads the bundled font if present, else falls back to a logical monospaced font. */
+    private Font loadFont() {
+        try (InputStream in = getClass().getResourceAsStream("/fonts/game.ttf")) {
+            if (in != null) {
+                Font f = Font.createFont(Font.TRUETYPE_FONT, in);
+                GraphicsEnvironment.getLocalGraphicsEnvironment().registerFont(f);
+                return f;
+            }
+        } catch (Exception e) {
+            // fall through to the logical monospaced fallback
+        }
+        return new Font(Font.MONOSPACED, Font.PLAIN, 12);
+    }
+
+    /** Detects the display scale; HiDPI-aware where the platform reports it, else uses DPI. */
+    private float detectScale() {
+        try {
+            GraphicsConfiguration gc = GraphicsEnvironment.getLocalGraphicsEnvironment()
+                    .getDefaultScreenDevice().getDefaultConfiguration();
+            double transform = gc.getDefaultTransform().getScaleX();
+            if (transform > 1.0) {
+                return (float) transform;
+            }
+        } catch (Exception ignored) {
+            // fall through to DPI heuristic
+        }
+        try {
+            int dpi = Toolkit.getDefaultToolkit().getScreenResolution();
+            return Math.max(1f, dpi / 96f);
+        } catch (Exception ignored) {
+            return 1f;
+        }
+    }
+
+    /** Sizes the side panel to a fraction of the window width, clamped to [min, max] (scaled). */
+    private void updateSideWidth() {
+        int min = (int) (SIDE_MIN * uiScale);
+        int max = (int) (SIDE_MAX * uiScale);
+        int target = Math.max(min, Math.min(max, (int) (frame.getWidth() * SIDE_RATIO)));
+        sidePanel.setPreferredSize(new Dimension(target, 0));
+        questScroll.setPreferredSize(new Dimension(target, (int) (frame.getHeight() * 0.32)));
+        sidePanel.revalidate();
+        frame.validate();
+        // The side panel changed size: let the map re-fit into it.
+        map.revalidate();
+        map.repaint();
+    }
+
+    /**
+     * Auto-scale derived from the window size relative to the design size
+     * (900x600). At the initial size this equals {@link #uiScale}; growing the
+     * window grows the text, mirroring how the map fits its panel.
+     */
+    private float frameScale() {
+        double s = Math.min(frame.getWidth() / 900.0, frame.getHeight() / 600.0);
+        return (float) Math.max(0.6, Math.min(2.6, s));
+    }
+
+    /** Re-derives and applies all component fonts from the window auto-scale and zoom. */
+    private void applyFonts() {
+        float auto = frameScale();
+        float main = BASE_SIZE * auto * zoom;
+        float small = SMALL_SIZE * auto * zoom;
+        output.setFont(baseFont.deriveFont(main));
+        input.setFont(baseFont.deriveFont(main));
+        hud.setFont(baseFont.deriveFont(small));
+        quests.setFont(baseFont.deriveFont(small));
+        map.setZoom(zoom);
+        frame.revalidate();
+        frame.repaint();
+    }
+
+    /** Binds Ctrl +, Ctrl - and Ctrl 0 to live font zoom. */
+    private void installZoomKeys() {
+        JComponent root = frame.getRootPane();
+        bind(root, KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, KeyEvent.CTRL_DOWN_MASK), "zoomIn");
+        bind(root, KeyStroke.getKeyStroke(KeyEvent.VK_EQUALS, KeyEvent.CTRL_DOWN_MASK), "zoomIn");
+        bind(root, KeyStroke.getKeyStroke(KeyEvent.VK_ADD, KeyEvent.CTRL_DOWN_MASK), "zoomIn");
+        bind(root, KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, KeyEvent.CTRL_DOWN_MASK), "zoomOut");
+        bind(root, KeyStroke.getKeyStroke(KeyEvent.VK_SUBTRACT, KeyEvent.CTRL_DOWN_MASK), "zoomOut");
+        bind(root, KeyStroke.getKeyStroke(KeyEvent.VK_0, KeyEvent.CTRL_DOWN_MASK), "zoomReset");
+
+        root.getActionMap().put("zoomIn", action(e -> setZoom(zoom + 0.1f)));
+        root.getActionMap().put("zoomOut", action(e -> setZoom(zoom - 0.1f)));
+        root.getActionMap().put("zoomReset", action(e -> setZoom(1f)));
+    }
+
+    private void bind(JComponent c, KeyStroke ks, String name) {
+        c.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(ks, name);
+    }
+
+    private AbstractAction action(java.util.function.Consumer<ActionEvent> body) {
+        return new AbstractAction() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                body.accept(e);
+            }
+        };
+    }
+
+    private void setZoom(float z) {
+        zoom = Math.max(0.6f, Math.min(3.0f, z));
+        applyFonts();
+    }
+
+    private Color colorFor(Style s) {
+        return switch (s) {
+            case HEADING -> new Color(0xc9, 0x8a, 0xe0);
+            case ITEM -> new Color(0x46, 0xc8, 0xd8);
+            case NPC -> new Color(0xe6, 0xc3, 0x4a);
+            case EXIT -> new Color(0x6f, 0xcf, 0x73);
+            case DANGER -> new Color(0xe0, 0x6c, 0x6c);
+            case DIM -> new Color(0x6b, 0x72, 0x80);
+            case PLAIN -> new Color(0xcf, 0xd6, 0xe0);
+        };
+    }
+
+    private void appendSpans(List<Span> spans) {
+        SwingUtilities.invokeLater(() -> {
+            try {
+                for (Span sp : spans) {
+                    SimpleAttributeSet as = new SimpleAttributeSet();
+                    StyleConstants.setForeground(as, colorFor(sp.style()));
+                    if (sp.style() == Style.HEADING) {
+                        StyleConstants.setBold(as, true);
+                    }
+                    doc.insertString(doc.getLength(), sp.text(), as);
+                }
+                output.setCaretPosition(doc.getLength());
+            } catch (BadLocationException ignored) {
+                // append-only; cannot occur with getLength()
+            }
+        });
+    }
+
     @Override
     public String readLine() {
         try {
@@ -79,7 +303,216 @@ public class SwingIO implements GameIO {
     }
 
     @Override
-    public void write(String s) {
+    public void print(StyledText text) {
-        SwingUtilities.invokeLater(() -> output.append(s + "\n"));
+        List<Span> spans = new ArrayList<>(text.spans());
+        spans.add(new Span("\n", Style.PLAIN));
+        appendSpans(spans);
+    }
+
+    @Override
+    public void showRoom(RoomView room) {
+        List<Span> spans = new ArrayList<>();
+        spans.add(new Span(room.name() + "\n", Style.HEADING));
+        spans.add(new Span(room.description().stripTrailing() + "\n", Style.PLAIN));
+        if (!room.items().isEmpty()) {
+            spans.add(new Span("You see ", Style.PLAIN));
+            addList(spans, room.items(), Style.ITEM);
+            spans.add(new Span(".\n", Style.PLAIN));
+        }
+        if (!room.npcs().isEmpty()) {
+            addList(spans, room.npcs(), Style.NPC);
+            spans.add(new Span(" is here.\n", Style.PLAIN));
+        }
+        appendSpans(spans);
+        // Exits are shown by the map panel, not as text.
+    }
+
+    @Override
+    public void setHud(Hud h) {
+        String txt = "  " + h.location() + "     gold " + h.gold() + "     turn " + h.turn()
+                + "     light " + (h.lightOn() ? "on" : "off");
+        SwingUtilities.invokeLater(() -> hud.setText(txt));
+    }
+
+    @Override
+    public void setMusic(String track) {
+        music.room(track);
+    }
+
+    @Override
+    public void setMusicLevel(MusicLevel level) {
+        music.level(level);
+    }
+
+    @Override
+    public void setMap(MapView view) {
+        map.show(view);
+    }
+
+    @Override
+    public void travelStep(MapView view) {
+        setMap(view);
+        try {
+            Thread.sleep(TRAVEL_STEP_MS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+    }
+
+    @Override
+    public void setQuests(QuestView view) {
+        quests.show(view);
+    }
+
+    @Override
+    public void showQuests(QuestView view) {
+        // The GUI quest box is always visible; nothing extra to do.
+    }
+
+    @Override
+    public void showMap(MapView view) {
+        // The GUI map panel is always visible; nothing extra to do on the 'map' command.
+    }
+
+    @Override
+    public int choose(String title, List<String> options) {
+        // Full-window overlay (glass pane), not a floating dialog: it covers the game
+        // chrome so no panels/outlines show behind the menu, and it fills + scales with
+        // the window. EDT↔worker handoff as in readLine: the worker blocks on take(),
+        // a button click / Escape offers the chosen index.
+        LinkedBlockingQueue<Integer> picked = new LinkedBlockingQueue<>();
+        SwingUtilities.invokeLater(() -> showMenuOverlay(title, options, picked));
+        try {
+            return picked.take();
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            return options.size() - 1;
+        }
+    }
+
+    /** Current menu being shown, so a window resize can rebuild it at the new scale. */
+    private String menuTitle;
+    private List<String> menuOptions;
+    private LinkedBlockingQueue<Integer> menuPicked;
+
+    /** Rebuilds the visible menu overlay at the current window scale (called on resize). */
+    private void rescaleMenuOverlayIfVisible() {
+        if (menuOptions != null && frame.getGlassPane().isVisible()) {
+            showMenuOverlay(menuTitle, menuOptions, menuPicked);
+        }
+    }
+
+    /** Installs the menu as the frame's glass pane (covers everything) and shows it. */
+    private void showMenuOverlay(String title, List<String> options, LinkedBlockingQueue<Integer> picked) {
+        menuTitle = title;
+        menuOptions = options;
+        menuPicked = picked;
+        float scale = frameScale() * zoom; // same scaling the rest of the UI uses
+
+        JPanel glass = new JPanel(new GridBagLayout());
+        glass.setOpaque(true);
+        glass.setBackground(MENU_BG);
+        glass.addMouseListener(new java.awt.event.MouseAdapter() { }); // swallow backdrop clicks
+
+        JPanel card = new JPanel();
+        card.setOpaque(false);
+        card.setLayout(new BoxLayout(card, BoxLayout.Y_AXIS));
+
+        JLabel heading = new JLabel(title.toUpperCase());
+        heading.setForeground(MENU_TITLE);
+        heading.setFont(baseFont.deriveFont(Font.BOLD, BASE_SIZE * scale * 1.6f));
+        heading.setAlignmentX(Component.CENTER_ALIGNMENT);
+        heading.setBorder(BorderFactory.createEmptyBorder(0, 0, (int) (22 * scale), 0));
+        card.add(heading);
+
+        Runnable cancel = () -> {
+            hideMenuOverlay();
+            picked.offer(options.size() - 1);
+        };
+        for (int i = 0; i < options.size(); i++) {
+            int idx = i;
+            JButton b = menuButton(options.get(i), scale);
+            b.addActionListener(e -> {
+                hideMenuOverlay();
+                picked.offer(idx);
+            });
+            card.add(b);
+            if (i < options.size() - 1) {
+                card.add(Box.createVerticalStrut((int) (10 * scale)));
+            }
+        }
+
+        // Escape selects the last (safe/cancel) option — mirrors the console EOF convention.
+        glass.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
+                .put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), "menuCancel");
+        glass.getActionMap().put("menuCancel", action(e -> cancel.run()));
+
+        glass.add(card); // single child → centered by GridBagLayout
+        frame.setGlassPane(glass);
+        glass.setVisible(true);
+        glass.requestFocusInWindow();
+    }
+
+    private void hideMenuOverlay() {
+        menuOptions = null; // stop resize rebuilds once the menu is dismissed
+        frame.getGlassPane().setVisible(false);
+    }
+
+    /** Palette for the themed menu overlay, matching the game window's dark look. */
+    private static final Color MENU_BG = new Color(0x0b, 0x0e, 0x13);
+    private static final Color MENU_TITLE = new Color(0xc9, 0x8a, 0xe0);
+    private static final Color BTN_BG = new Color(0x16, 0x1b, 0x24);
+    private static final Color BTN_BG_HOVER = new Color(0x22, 0x2a, 0x37);
+    private static final Color BTN_FG = new Color(0xcf, 0xd6, 0xe0);
+    private static final Color BTN_LINE = new Color(0x2a, 0x2f, 0x3a);
+    private static final Color BTN_LINE_HOVER = new Color(0x6f, 0xcf, 0x73);
+
+    /** A flat, dark, fixed-width menu button matching the game palette, with hover feedback. */
+    private JButton menuButton(String text, float scale) {
+        int padV = (int) (11 * scale);
+        int padH = (int) (18 * scale);
+        JButton b = new JButton(text);
+        b.setFont(baseFont.deriveFont(BASE_SIZE * scale));
+        b.setForeground(BTN_FG);
+        b.setBackground(BTN_BG);
+        b.setFocusPainted(false);
+        b.setOpaque(true);
+        b.setHorizontalAlignment(SwingConstants.LEFT);
+        b.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
+        b.setAlignmentX(Component.CENTER_ALIGNMENT);
+        b.setBorder(menuButtonBorder(BTN_LINE, padV, padH));
+        Dimension size = new Dimension((int) (340 * scale), b.getPreferredSize().height);
+        b.setPreferredSize(size);
+        b.setMinimumSize(size);
+        b.setMaximumSize(size);
+        b.addMouseListener(new java.awt.event.MouseAdapter() {
+            @Override
+            public void mouseEntered(java.awt.event.MouseEvent e) {
+                b.setBackground(BTN_BG_HOVER);
+                b.setBorder(menuButtonBorder(BTN_LINE_HOVER, padV, padH));
+            }
+
+            @Override
+            public void mouseExited(java.awt.event.MouseEvent e) {
+                b.setBackground(BTN_BG);
+                b.setBorder(menuButtonBorder(BTN_LINE, padV, padH));
+            }
+        });
+        return b;
+    }
+
+    private static javax.swing.border.Border menuButtonBorder(Color line, int padV, int padH) {
+        return BorderFactory.createCompoundBorder(
+                BorderFactory.createLineBorder(line, 1),
+                BorderFactory.createEmptyBorder(padV, padH, padV, padH));
+    }
+
+    private void addList(List<Span> spans, List<String> xs, Style st) {
+        for (int i = 0; i < xs.size(); i++) {
+            if (i > 0) {
+                spans.add(new Span(", ", Style.PLAIN));
+            }
+            spans.add(new Span(xs.get(i), st));
+        }
     }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/AsciiMap.java

@@ -0,0 +1,127 @@
+package thb.jeanluc.adventure.io.text;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Renders a {@link MapView} as a styled ASCII grid: boxed rooms connected by
+ * corridor lines. Box-drawing uses Unicode or pure ASCII depending on {@code unicode}.
+ */
+public final class AsciiMap {
+
+    private static final int MIN_INNER = 7;   // minimum room name field width
+    private static final int MAX_INNER = 14;  // cap so the map stays compact
+    private static final int GAP = 3;         // horizontal corridor width
+
+    private AsciiMap() {
+    }
+
+    public static StyledText render(MapView view, boolean unicode) {
+        if (view.cells().isEmpty()) {
+            return StyledText.of("(no map yet)");
+        }
+
+        int maxX = 0;
+        int maxY = 0;
+        int inner = MIN_INNER;
+        Map<Long, RoomCell> at = new HashMap<>();
+        for (RoomCell c : view.cells()) {
+            maxX = Math.max(maxX, c.x());
+            maxY = Math.max(maxY, c.y());
+            inner = Math.max(inner, Math.min(MAX_INNER, c.name().length()));
+            at.put(key(c.x(), c.y()), c);
+        }
+
+        Set<Long> hEdge = new HashSet<>();
+        Set<Long> vEdge = new HashSet<>();
+        for (Connection cn : view.connections()) {
+            RoomCell a = cn.from();
+            RoomCell b = cn.to();
+            if (a.y() == b.y()) {
+                hEdge.add(key(Math.min(a.x(), b.x()), a.y()));
+            } else if (a.x() == b.x()) {
+                vEdge.add(key(a.x(), Math.min(a.y(), b.y())));
+            }
+        }
+
+        String tl = unicode ? "┌" : "+";
+        String tr = unicode ? "┐" : "+";
+        String bl = unicode ? "└" : "+";
+        String br = unicode ? "┘" : "+";
+        String hz = unicode ? "─" : "-";
+        String vt = unicode ? "│" : "|";
+
+        int boxW = inner + 2;
+        int leftPad = (boxW - 1) / 2;
+        int rightPad = boxW - 1 - leftPad;
+
+        StyledText.Builder b = StyledText.builder();
+        for (int gy = 0; gy <= maxY; gy++) {
+            for (int line = 0; line < 3; line++) {
+                for (int gx = 0; gx <= maxX; gx++) {
+                    RoomCell c = at.get(key(gx, gy));
+                    if (c == null) {
+                        b.plain(" ".repeat(boxW));
+                    } else if (line == 0) {
+                        styled(b, tl + hz.repeat(inner) + tr, c.state());
+                    } else if (line == 2) {
+                        styled(b, bl + hz.repeat(inner) + br, c.state());
+                    } else {
+                        styled(b, vt + center(label(c, inner), inner) + vt, c.state());
+                    }
+                    if (gx < maxX) {
+                        if (line == 1 && hEdge.contains(key(gx, gy))) {
+                            b.dim(hz.repeat(GAP));
+                        } else {
+                            b.plain(" ".repeat(GAP));
+                        }
+                    }
+                }
+                b.plain("\n");
+            }
+            if (gy < maxY) {
+                for (int gx = 0; gx <= maxX; gx++) {
+                    if (vEdge.contains(key(gx, gy))) {
+                        b.plain(" ".repeat(leftPad)).dim(vt).plain(" ".repeat(rightPad));
+                    } else {
+                        b.plain(" ".repeat(boxW));
+                    }
+                    if (gx < maxX) {
+                        b.plain(" ".repeat(GAP));
+                    }
+                }
+                b.plain("\n");
+            }
+        }
+        return b.build();
+    }
+
+    private static void styled(StyledText.Builder b, String s, CellState state) {
+        switch (state) {
+            case CURRENT -> b.heading(s);
+            case KNOWN -> b.dim(s);
+            default -> b.plain(s);
+        }
+    }
+
+    private static String label(RoomCell c, int inner) {
+        String n = c.name();
+        if (n.length() > inner) {
+            n = n.substring(0, inner);
+        }
+        return n;
+    }
+
+    private static String center(String s, int width) {
+        int total = width - s.length();
+        int left = total / 2;
+        int right = total - left;
+        return " ".repeat(left) + s + " ".repeat(right);
+    }
+
+    private static long key(int x, int y) {
+        return (((long) x) << 32) ^ (y & 0xffffffffL);
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/Banner.java

@@ -0,0 +1,18 @@
+package thb.jeanluc.adventure.io.text;
+
+/** Builds styled banners for big moments (game start, finale). */
+public final class Banner {
+
+    private Banner() {
+    }
+
+    /** A framed, heading-styled welcome banner for the given title. */
+    public static StyledText welcome(String title) {
+        String bar = "=".repeat(Math.max(8, title.length() + 8));
+        return StyledText.builder()
+                .heading(bar + "\n")
+                .heading("    " + title + "\n")
+                .heading(bar)
+                .build();
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/CellState.java

@@ -0,0 +1,4 @@
+package thb.jeanluc.adventure.io.text;
+
+/** Fog-of-war state of a room on the map. */
+public enum CellState { CURRENT, VISITED, KNOWN }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/Connection.java

@@ -0,0 +1,4 @@
+package thb.jeanluc.adventure.io.text;
+
+/** A corridor between two placed rooms. */
+public record Connection(RoomCell from, RoomCell to) {}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/Hud.java

@@ -0,0 +1,4 @@
+package thb.jeanluc.adventure.io.text;
+
+/** Status snapshot for the HUD region. */
+public record Hud(String location, int gold, int turn, boolean lightOn) {}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/MapView.java

@@ -0,0 +1,11 @@
+package thb.jeanluc.adventure.io.text;
+
+import java.util.List;
+
+/** Frontend-agnostic snapshot of the visible map: placed cells + connections. */
+public record MapView(List<RoomCell> cells, List<Connection> connections) {
+    public MapView {
+        cells = List.copyOf(cells);
+        connections = List.copyOf(connections);
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/QuestEntry.java

@@ -0,0 +1,4 @@
+package thb.jeanluc.adventure.io.text;
+
+/** An active quest's title and its current objective. */
+public record QuestEntry(String title, String objective) {}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/QuestText.java

@@ -0,0 +1,29 @@
+package thb.jeanluc.adventure.io.text;
+
+/** Renders a {@link QuestView} as styled text for the console quest log. */
+public final class QuestText {
+
+    private QuestText() {
+    }
+
+    public static StyledText render(QuestView view) {
+        if (view.active().isEmpty() && view.completed().isEmpty()) {
+            return StyledText.of("You have no quests yet.");
+        }
+        StyledText.Builder b = StyledText.builder();
+        b.heading("QUESTS");
+        if (view.active().isEmpty()) {
+            b.plain("\n").dim("  (none active)");
+        }
+        for (QuestEntry e : view.active()) {
+            b.plain("\n").heading(e.title()).plain("\n").exit("  -> ").plain(e.objective());
+        }
+        if (!view.completed().isEmpty()) {
+            b.plain("\n\n").dim("Completed:");
+            for (String t : view.completed()) {
+                b.plain("\n").dim("  ✓ " + t);
+            }
+        }
+        return b.build();
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/QuestView.java

@@ -0,0 +1,11 @@
+package thb.jeanluc.adventure.io.text;
+
+import java.util.List;
+
+/** Frontend-agnostic snapshot of the quest log. */
+public record QuestView(List<QuestEntry> active, List<String> completed) {
+    public QuestView {
+        active = List.copyOf(active);
+        completed = List.copyOf(completed);
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/Renderings.java

@@ -0,0 +1,49 @@
+package thb.jeanluc.adventure.io.text;
+
+import java.util.List;
+
+/** Default, layout-free rendering of high-level views into {@link StyledText}. */
+public final class Renderings {
+
+    private Renderings() {
+    }
+
+    /** Generic room rendering used by non-overriding {@code GameIO}s (e.g. tests). */
+    public static StyledText roomToStyledText(RoomView r) {
+        StyledText.Builder b = StyledText.builder();
+        b.heading(r.name()).plain("\n");
+        b.plain(r.description().stripTrailing());
+        if (!r.items().isEmpty()) {
+            b.plain("\nYou see: ");
+            appendList(b, r.items(), Style.ITEM);
+            b.plain(".");
+        }
+        if (!r.npcs().isEmpty()) {
+            b.plain("\nHere is: ");
+            appendList(b, r.npcs(), Style.NPC);
+            b.plain(".");
+        }
+        if (r.exits().isEmpty()) {
+            b.plain("\nThere are no obvious exits.");
+        } else {
+            b.plain("\nExits: ");
+            appendList(b, r.exits(), Style.EXIT);
+            b.plain(".");
+        }
+        return b.build();
+    }
+
+    private static void appendList(StyledText.Builder b, List<String> xs, Style st) {
+        for (int i = 0; i < xs.size(); i++) {
+            if (i > 0) {
+                b.plain(", ");
+            }
+            switch (st) {
+                case ITEM -> b.item(xs.get(i));
+                case NPC -> b.npc(xs.get(i));
+                case EXIT -> b.exit(xs.get(i));
+                default -> b.plain(xs.get(i));
+            }
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/RoomCell.java

@@ -0,0 +1,4 @@
+package thb.jeanluc.adventure.io.text;
+
+/** A room placed on the map grid at integer coords, with its fog-of-war state. */
+public record RoomCell(String id, String name, int x, int y, CellState state) {}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/RoomView.java

@@ -0,0 +1,13 @@
+package thb.jeanluc.adventure.io.text;
+
+import java.util.List;
+
+/** Semantic snapshot of a room for rendering. Display-ready strings, no layout. */
+public record RoomView(String name, String description,
+                       List<String> items, List<String> npcs, List<String> exits) {
+    public RoomView {
+        items = List.copyOf(items);
+        npcs = List.copyOf(npcs);
+        exits = List.copyOf(exits);
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/Span.java

@@ -0,0 +1,13 @@
+package thb.jeanluc.adventure.io.text;
+
+/** A run of text carrying a single semantic {@link Style}. */
+public record Span(String text, Style style) {
+    public Span {
+        if (text == null) {
+            throw new IllegalArgumentException("text must not be null");
+        }
+        if (style == null) {
+            throw new IllegalArgumentException("style must not be null");
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/Style.java

@@ -0,0 +1,4 @@
+package thb.jeanluc.adventure.io.text;
+
+/** Semantic output roles. Renderers map each role to concrete colours/attributes. */
+public enum Style { PLAIN, HEADING, ITEM, NPC, EXIT, DANGER, DIM }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/io/text/StyledText.java

@@ -0,0 +1,59 @@
+package thb.jeanluc.adventure.io.text;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** An ordered, immutable list of styled {@link Span}s. Built via {@link Builder}. */
+public final class StyledText {
+
+    private final List<Span> spans;
+
+    private StyledText(List<Span> spans) {
+        this.spans = List.copyOf(spans);
+    }
+
+    /** @return the spans in order (unmodifiable). */
+    public List<Span> spans() {
+        return spans;
+    }
+
+    /** @return all span text concatenated, without any styling. */
+    public String plainText() {
+        StringBuilder sb = new StringBuilder();
+        for (Span s : spans) {
+            sb.append(s.text());
+        }
+        return sb.toString();
+    }
+
+    /** @return a styled text of a single {@link Style#PLAIN} span. */
+    public static StyledText of(String s) {
+        return new StyledText(List.of(new Span(s, Style.PLAIN)));
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /** Fluent builder; one method per {@link Style} role. */
+    public static final class Builder {
+        private final List<Span> spans = new ArrayList<>();
+
+        private Builder add(String text, Style style) {
+            spans.add(new Span(text, style));
+            return this;
+        }
+
+        public Builder plain(String s)   { return add(s, Style.PLAIN); }
+        public Builder heading(String s) { return add(s, Style.HEADING); }
+        public Builder item(String s)    { return add(s, Style.ITEM); }
+        public Builder npc(String s)     { return add(s, Style.NPC); }
+        public Builder exit(String s)    { return add(s, Style.EXIT); }
+        public Builder danger(String s)  { return add(s, Style.DANGER); }
+        public Builder dim(String s)     { return add(s, Style.DIM); }
+
+        public StyledText build() {
+            return new StyledText(spans);
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/CombinationFactory.java

@@ -0,0 +1,53 @@
+package thb.jeanluc.adventure.loader;
+
+import thb.jeanluc.adventure.loader.dto.CombinationDto;
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EffectDto;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.item.Item;
+
+import java.util.List;
+import java.util.Map;
+
+/** Builds {@link Combination}s from {@link CombinationDto}s, validating item ids. */
+public final class CombinationFactory {
+
+    private CombinationFactory() {
+    }
+
+    public static Combination fromDto(CombinationDto dto, Map<String, Item> items) {
+        requireItem(items, dto.a(), "a");
+        requireItem(items, dto.b(), "b");
+        if (dto.a().equals(dto.b())) {
+            throw new WorldLoadException(
+                    "Combination cannot combine an item with itself: '" + dto.a() + "'");
+        }
+        if (dto.consume() != null) {
+            for (String id : dto.consume()) {
+                requireItem(items, id, "consume");
+            }
+        }
+        if (dto.produce() != null) {
+            requireItem(items, dto.produce(), "produce");
+        }
+        return new Combination(
+                dto.a(),
+                dto.b(),
+                ConditionDto.toModelList(dto.requires()),
+                dto.consume() == null ? List.of() : List.copyOf(dto.consume()),
+                dto.produce(),
+                EffectDto.toModelList(dto.effects()),
+                dto.response(),
+                dto.failText());
+    }
+
+    private static void requireItem(Map<String, Item> items, String id, String field) {
+        if (id == null) {
+            throw new WorldLoadException("Combination '" + field + "' is missing an item id");
+        }
+        if (!items.containsKey(id)) {
+            throw new WorldLoadException(
+                    "Combination references unknown item '" + id + "' (field '" + field + "')");
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/EndingFactory.java

@@ -0,0 +1,21 @@
+package thb.jeanluc.adventure.loader;
+
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EndingDto;
+import thb.jeanluc.adventure.model.Ending;
+
+/** Builds {@link Ending} objects from {@link EndingDto}s. */
+public final class EndingFactory {
+
+    private EndingFactory() {
+    }
+
+    public static Ending fromDto(EndingDto dto) {
+        return new Ending(
+                dto.id(),
+                dto.title(),
+                Boolean.TRUE.equals(dto.victory()),
+                ConditionDto.toModelList(dto.when()),
+                dto.text());
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/ItemFactory.java

@@ -30,12 +30,14 @@ public final class ItemFactory {
                     .id(dto.id())
                     .name(dto.name())
                     .description(dto.description())
+                    .light(Boolean.TRUE.equals(dto.light()))
                     .build();
             case "readable" -> ReadableItem.builder()
                     .id(dto.id())
                     .name(dto.name())
                     .description(dto.description())
                     .readText(dto.readText())
+                    .light(Boolean.TRUE.equals(dto.light()))
                     .build();
             case "switchable" -> SwitchableItem.builder()
                     .id(dto.id())
@@ -44,6 +46,8 @@ public final class ItemFactory {
                     .state(Boolean.TRUE.equals(dto.initialState()))
                     .onText(dto.onText())
                     .offText(dto.offText())
+                    .effects(thb.jeanluc.adventure.loader.dto.EffectDto.toModelList(dto.effects()))
+                    .light(Boolean.TRUE.equals(dto.light()))
                     .build();
             default -> throw new WorldLoadException(
                     "Unknown item type '" + dto.type() + "' on item '" + dto.id() + "'");

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/QuestFactory.java

@@ -0,0 +1,36 @@
+package thb.jeanluc.adventure.loader;
+
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EffectDto;
+import thb.jeanluc.adventure.loader.dto.QuestDto;
+import thb.jeanluc.adventure.loader.dto.QuestStageDto;
+import thb.jeanluc.adventure.model.Quest;
+import thb.jeanluc.adventure.model.QuestStage;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** Builds {@link Quest} objects from {@link QuestDto}s (no reference resolution needed). */
+public final class QuestFactory {
+
+    private QuestFactory() {
+    }
+
+    public static Quest fromDto(QuestDto dto) {
+        List<QuestStage> stages = new ArrayList<>();
+        if (dto.stages() != null) {
+            for (QuestStageDto s : dto.stages()) {
+                stages.add(new QuestStage(
+                        s.objective(),
+                        ConditionDto.toModelList(s.completion()),
+                        EffectDto.toModelList(s.onComplete())));
+            }
+        }
+        return new Quest(
+                dto.id(),
+                dto.title(),
+                Boolean.TRUE.equals(dto.autoStart()),
+                stages,
+                EffectDto.toModelList(dto.onComplete()));
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/ReferenceResolver.java

@@ -1,10 +1,18 @@
 package thb.jeanluc.adventure.loader;
 
 import lombok.RequiredArgsConstructor;
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.DescriptionStateDto;
+import thb.jeanluc.adventure.loader.dto.DialogueLineDto;
+import thb.jeanluc.adventure.loader.dto.EffectDto;
+import thb.jeanluc.adventure.loader.dto.ExitLockDto;
 import thb.jeanluc.adventure.loader.dto.NpcDto;
 import thb.jeanluc.adventure.loader.dto.ReactionDto;
 import thb.jeanluc.adventure.loader.dto.RoomDto;
+import thb.jeanluc.adventure.model.DescriptionState;
+import thb.jeanluc.adventure.model.DialogueLine;
 import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
 import thb.jeanluc.adventure.model.Npc;
 import thb.jeanluc.adventure.model.NpcReaction;
 import thb.jeanluc.adventure.model.Room;
@@ -75,6 +83,25 @@ public class ReferenceResolver {
                     room.addNpc(npc);
                 }
             }
+            if (dto.exitLocks() != null) {
+                for (ExitLockDto lock : dto.exitLocks()) {
+                    Direction direction;
+                    try {
+                        direction = Direction.fromString(lock.direction());
+                    } catch (IllegalArgumentException ex) {
+                        throw new WorldLoadException(
+                                "Room '" + dto.id() + "' has exit lock with unknown direction '" + lock.direction() + "'");
+                    }
+                    room.addExitLock(direction, new ExitLock(
+                            ConditionDto.toModelList(lock.requires()), lock.blocked()));
+                }
+            }
+            if (dto.descriptionStates() != null) {
+                for (DescriptionStateDto ds : dto.descriptionStates()) {
+                    room.addDescriptionState(new DescriptionState(
+                            ConditionDto.toModelList(ds.when()), ds.text()));
+                }
+            }
         }
     }
 
@@ -86,10 +113,15 @@ public class ReferenceResolver {
      */
     public void resolveNpcs(List<NpcDto> npcDtos) {
         for (NpcDto dto : npcDtos) {
+            Npc npc = npcs.get(dto.id());
+            if (dto.dialogue() != null) {
+                for (DialogueLineDto dl : dto.dialogue()) {
+                    npc.addDialogue(new DialogueLine(ConditionDto.toModelList(dl.when()), dl.text()));
+                }
+            }
             if (dto.reactions() == null) {
                 continue;
             }
-            Npc npc = npcs.get(dto.id());
             for (ReactionDto r : dto.reactions()) {
                 if (r.onReceive() == null) {
                     throw new WorldLoadException(
@@ -123,6 +155,8 @@ public class ReferenceResolver {
                         .consumes(consumes)
                         .gives(gives)
                         .response(r.response())
+                        .requires(ConditionDto.toModelList(r.requires()))
+                        .effects(EffectDto.toModelList(r.effects()))
                         .build();
                 npc.putReaction(r.onReceive(), reaction);
             }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/RoomFactory.java

@@ -19,6 +19,9 @@ public final class RoomFactory {
      * @return the freshly built room shell
      */
     public static Room shellFromDto(RoomDto dto) {
-        return new Room(dto.id(), dto.name(), dto.description());
+        Room room = new Room(dto.id(), dto.name(), dto.description());
+        room.setDark(Boolean.TRUE.equals(dto.dark()));
+        room.setMusic(dto.music());
+        return room;
     }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/TutorialLoader.java

@@ -0,0 +1,63 @@
+package thb.jeanluc.adventure.loader;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+import thb.jeanluc.adventure.loader.dto.TutorialDto;
+import thb.jeanluc.adventure.loader.dto.TutorialStepDto;
+import thb.jeanluc.adventure.model.Tutorial;
+import thb.jeanluc.adventure.model.TutorialStep;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Loads the optional onboarding tutorial from {@code <base>/tutorial.yaml}.
+ * Kept separate from {@link WorldLoader}: the tutorial is onboarding, not world
+ * content. Returns {@link Tutorial#none()} when the file is absent.
+ */
+public class TutorialLoader {
+
+    /** Default classpath base directory. */
+    public static final String DEFAULT_BASE = "/world";
+
+    private final ObjectMapper yaml = new ObjectMapper(new YAMLFactory());
+    private final String basePath;
+
+    public TutorialLoader() {
+        this(DEFAULT_BASE);
+    }
+
+    public TutorialLoader(String basePath) {
+        this.basePath = basePath;
+    }
+
+    /** Reads the tutorial; absent file → {@link Tutorial#none()}. */
+    public Tutorial load() {
+        String resource = basePath + "/tutorial.yaml";
+        try (InputStream in = getClass().getResourceAsStream(resource)) {
+            if (in == null) {
+                return Tutorial.none();
+            }
+            TutorialDto dto = yaml.readValue(in, TutorialDto.class);
+            if (dto == null) {
+                return Tutorial.none();
+            }
+            List<TutorialStep> steps = new ArrayList<>();
+            if (dto.steps() != null) {
+                for (TutorialStepDto s : dto.steps()) {
+                    steps.add(new TutorialStep(
+                            s.instruction(),
+                            s.expect(),
+                            s.minArgs() == null ? 0 : s.minArgs(),
+                            s.confirm(),
+                            s.hint()));
+                }
+            }
+            return new Tutorial(dto.intro(), steps, dto.closingTips());
+        } catch (IOException e) {
+            throw new WorldLoadException("Failed to parse " + resource, e);
+        }
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/WorldLoader.java

@@ -5,18 +5,25 @@ import com.fasterxml.jackson.databind.type.CollectionType;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import thb.jeanluc.adventure.loader.dto.CombinationDto;
+import thb.jeanluc.adventure.loader.dto.EndingDto;
 import thb.jeanluc.adventure.loader.dto.GameDto;
 import thb.jeanluc.adventure.loader.dto.ItemDto;
 import thb.jeanluc.adventure.loader.dto.NpcDto;
+import thb.jeanluc.adventure.loader.dto.QuestDto;
 import thb.jeanluc.adventure.loader.dto.RoomDto;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.Ending;
 import thb.jeanluc.adventure.model.Npc;
 import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Quest;
 import thb.jeanluc.adventure.model.Room;
 import thb.jeanluc.adventure.model.World;
 import thb.jeanluc.adventure.model.item.Item;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -68,11 +75,17 @@ public class WorldLoader {
         List<ItemDto> itemDtos = readList(basePath + "/items.yaml", ItemDto.class);
         List<NpcDto> npcDtos = readList(basePath + "/npcs.yaml", NpcDto.class);
         List<RoomDto> roomDtos = readList(basePath + "/rooms.yaml", RoomDto.class);
+        List<QuestDto> questDtos = readListOptional(basePath + "/quests.yaml", QuestDto.class);
+        List<EndingDto> endingDtos = readListOptional(basePath + "/endings.yaml", EndingDto.class);
+        List<CombinationDto> combinationDtos =
+                readListOptional(basePath + "/combinations.yaml", CombinationDto.class);
         GameDto gameDto = readSingle(basePath + "/game.yaml", GameDto.class);
 
         requireUniqueIds("item", itemDtos.stream().map(ItemDto::id).toList());
         requireUniqueIds("npc", npcDtos.stream().map(NpcDto::id).toList());
         requireUniqueIds("room", roomDtos.stream().map(RoomDto::id).toList());
+        requireUniqueIds("quest", questDtos.stream().map(QuestDto::id).toList());
+        requireUniqueIds("ending", endingDtos.stream().map(EndingDto::id).toList());
 
         Map<String, Item> items = new HashMap<>();
         for (ItemDto dto : itemDtos) {
@@ -86,6 +99,24 @@ public class WorldLoader {
         for (RoomDto dto : roomDtos) {
             rooms.put(dto.id(), RoomFactory.shellFromDto(dto));
         }
+        Map<String, Quest> quests = new HashMap<>();
+        for (QuestDto dto : questDtos) {
+            quests.put(dto.id(), QuestFactory.fromDto(dto));
+        }
+        List<Ending> endings = new ArrayList<>();
+        for (EndingDto dto : endingDtos) {
+            endings.add(EndingFactory.fromDto(dto));
+        }
+
+        Map<String, Combination> combinations = new HashMap<>();
+        for (CombinationDto dto : combinationDtos) {
+            Combination c = CombinationFactory.fromDto(dto, items);
+            String key = c.key();
+            if (combinations.containsKey(key)) {
+                throw new WorldLoadException("Duplicate combination for pair '" + key + "'");
+            }
+            combinations.put(key, c);
+        }
 
         ReferenceResolver resolver = new ReferenceResolver(items, npcs, rooms);
         resolver.resolveRooms(roomDtos);
@@ -98,7 +129,7 @@ public class WorldLoader {
         Player player = new Player(start, gold);
 
         World world = new World(rooms, items, npcs,
-                gameDto.title(), gameDto.welcomeMessage());
+                gameDto.title(), gameDto.welcomeMessage(), quests, endings, combinations);
         log.info("World '{}' loaded: {} rooms, {} items, {} npcs",
                 gameDto.title(), rooms.size(), items.size(), npcs.size());
         return new LoadResult(world, player);
@@ -114,6 +145,19 @@ public class WorldLoader {
         }
     }
 
+    private <T> List<T> readListOptional(String resource, Class<T> elementType) {
+        try (InputStream in = getClass().getResourceAsStream(resource)) {
+            if (in == null) {
+                return List.of();
+            }
+            CollectionType type = yaml.getTypeFactory().constructCollectionType(List.class, elementType);
+            List<T> result = yaml.readValue(in, type);
+            return result == null ? List.of() : result;
+        } catch (IOException e) {
+            throw new WorldLoadException("Failed to parse " + resource, e);
+        }
+    }
+
     private <T> T readSingle(String resource, Class<T> type) {
         try (InputStream in = openResource(resource)) {
             return yaml.readValue(in, type);

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/CombinationDto.java

@@ -0,0 +1,16 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of an item-combination recipe. */
+public record CombinationDto(
+        String a,
+        String b,
+        List<ConditionDto> requires,
+        List<String> consume,
+        String produce,
+        List<EffectDto> effects,
+        String response,
+        String failText
+) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/ConditionDto.java

@@ -0,0 +1,34 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import thb.jeanluc.adventure.loader.WorldLoadException;
+import thb.jeanluc.adventure.model.Condition;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** YAML condition: exactly one of the fields is set. */
+public record ConditionDto(String flag, String notFlag, String hasItem) {
+
+    public Condition toModel() {
+        if (flag != null) {
+            return new Condition(Condition.Type.FLAG, flag);
+        }
+        if (notFlag != null) {
+            return new Condition(Condition.Type.NOT_FLAG, notFlag);
+        }
+        if (hasItem != null) {
+            return new Condition(Condition.Type.HAS_ITEM, hasItem);
+        }
+        throw new WorldLoadException("Condition must set one of flag/notFlag/hasItem");
+    }
+
+    public static List<Condition> toModelList(List<ConditionDto> dtos) {
+        List<Condition> out = new ArrayList<>();
+        if (dtos != null) {
+            for (ConditionDto d : dtos) {
+                out.add(d.toModel());
+            }
+        }
+        return out;
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/DescriptionStateDto.java

@@ -0,0 +1,7 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a conditional room description. */
+public record DescriptionStateDto(List<ConditionDto> when, String text) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/DialogueLineDto.java

@@ -0,0 +1,7 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a conditional NPC line. */
+public record DialogueLineDto(List<ConditionDto> when, String text) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/EffectDto.java

@@ -0,0 +1,50 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import thb.jeanluc.adventure.loader.WorldLoadException;
+import thb.jeanluc.adventure.model.Effect;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** YAML effect: exactly one of the fields is set. */
+public record EffectDto(String setFlag, String clearFlag, String giveItem, String removeItem,
+                        String say, String startQuest) {
+
+    /** Backward-compatible constructor without startQuest. */
+    public EffectDto(String setFlag, String clearFlag, String giveItem, String removeItem, String say) {
+        this(setFlag, clearFlag, giveItem, removeItem, say, null);
+    }
+
+    public Effect toModel() {
+        if (setFlag != null) {
+            return new Effect(Effect.Type.SET_FLAG, setFlag);
+        }
+        if (clearFlag != null) {
+            return new Effect(Effect.Type.CLEAR_FLAG, clearFlag);
+        }
+        if (giveItem != null) {
+            return new Effect(Effect.Type.GIVE_ITEM, giveItem);
+        }
+        if (removeItem != null) {
+            return new Effect(Effect.Type.REMOVE_ITEM, removeItem);
+        }
+        if (say != null) {
+            return new Effect(Effect.Type.SAY, say);
+        }
+        if (startQuest != null) {
+            return new Effect(Effect.Type.START_QUEST, startQuest);
+        }
+        throw new WorldLoadException(
+                "Effect must set one of setFlag/clearFlag/giveItem/removeItem/say/startQuest");
+    }
+
+    public static List<Effect> toModelList(List<EffectDto> dtos) {
+        List<Effect> out = new ArrayList<>();
+        if (dtos != null) {
+            for (EffectDto d : dtos) {
+                out.add(d.toModel());
+            }
+        }
+        return out;
+    }
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/EndingDto.java

@@ -0,0 +1,7 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a game ending. */
+public record EndingDto(String id, String title, Boolean victory, List<ConditionDto> when, String text) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/ExitLockDto.java

@@ -0,0 +1,7 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a single condition-gated exit. */
+public record ExitLockDto(String direction, List<ConditionDto> requires, String blocked) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/ItemDto.java

@@ -1,5 +1,7 @@
 package thb.jeanluc.adventure.loader.dto;
 
+import java.util.List;
+
 /**
  * YAML representation of a single item. Fields outside of the type's
  * scope (e.g. {@code readText} on a switchable) are simply ignored.
@@ -12,6 +14,8 @@ package thb.jeanluc.adventure.loader.dto;
  * @param initialState initial on/off state of a switchable item
  * @param onText       message printed when a switchable transitions to on
  * @param offText      message printed when a switchable transitions to off
+ * @param effects      effects applied when a switchable transitions to on; nullable
+ * @param light        whether this item is a light source; nullable
  */
 public record ItemDto(
         String type,
@@ -21,6 +25,13 @@ public record ItemDto(
         String readText,
         Boolean initialState,
         String onText,
-        String offText
+        String offText,
+        List<EffectDto> effects,
+        Boolean light
 ) {
+    /** Backward-compatible constructor without effects/light. */
+    public ItemDto(String type, String id, String name, String description,
+                   String readText, Boolean initialState, String onText, String offText) {
+        this(type, id, name, description, readText, initialState, onText, offText, null, null);
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/NpcDto.java

@@ -10,12 +10,18 @@ import java.util.List;
  * @param description examine description
  * @param greeting    text the NPC says on {@code talk}
  * @param reactions   list of trigger/response definitions; may be null
+ * @param dialogue    optional condition-gated dialogue lines; may be null
  */
 public record NpcDto(
         String id,
         String name,
         String description,
         String greeting,
-        List<ReactionDto> reactions
+        List<ReactionDto> reactions,
+        List<DialogueLineDto> dialogue
 ) {
+    /** Backward-compatible constructor without dialogue. */
+    public NpcDto(String id, String name, String description, String greeting, List<ReactionDto> reactions) {
+        this(id, name, description, greeting, reactions, null);
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/QuestDto.java

@@ -0,0 +1,8 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a quest. */
+public record QuestDto(String id, String title, Boolean autoStart,
+                       List<QuestStageDto> stages, List<EffectDto> onComplete) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/QuestStageDto.java

@@ -0,0 +1,7 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of a quest stage. */
+public record QuestStageDto(String objective, List<ConditionDto> completion, List<EffectDto> onComplete) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/ReactionDto.java

@@ -1,5 +1,7 @@
 package thb.jeanluc.adventure.loader.dto;
 
+import java.util.List;
+
 /**
  * YAML representation of a single NPC reaction.
  *
@@ -7,11 +9,19 @@ package thb.jeanluc.adventure.loader.dto;
  * @param response  text the NPC says after the exchange
  * @param gives     id of the item handed back; nullable
  * @param consumes  id of the item taken from the player; nullable
+ * @param requires  conditions that must hold; nullable
+ * @param effects   effects applied after a successful exchange; nullable
  */
 public record ReactionDto(
         String onReceive,
         String response,
         String gives,
-        String consumes
+        String consumes,
+        List<ConditionDto> requires,
+        List<EffectDto> effects
 ) {
+    /** Backward-compatible constructor without requires/effects. */
+    public ReactionDto(String onReceive, String response, String gives, String consumes) {
+        this(onReceive, response, gives, consumes, null, null);
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/RoomDto.java

@@ -12,6 +12,10 @@ import java.util.Map;
  * @param exits       direction-name to target-room-id map
  * @param items       ids of items initially in this room
  * @param npcs        ids of NPCs initially in this room
+ * @param exitLocks   optional condition-gates per exit direction
+ * @param descriptionStates optional condition-gated description variants
+ * @param dark        whether this room is dark; nullable
+ * @param music       optional GUI background-music track filename; null = none
  */
 public record RoomDto(
         String id,
@@ -19,6 +23,15 @@ public record RoomDto(
         String description,
         Map<String, String> exits,
         List<String> items,
-        List<String> npcs
+        List<String> npcs,
+        List<ExitLockDto> exitLocks,
+        List<DescriptionStateDto> descriptionStates,
+        Boolean dark,
+        String music
 ) {
+    /** Backward-compatible constructor without the optional state fields. */
+    public RoomDto(String id, String name, String description,
+                   Map<String, String> exits, List<String> items, List<String> npcs) {
+        this(id, name, description, exits, items, npcs, null, null, null, null);
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/TutorialDto.java

@@ -0,0 +1,7 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/** YAML representation of the tutorial document. */
+public record TutorialDto(String intro, List<TutorialStepDto> steps, String closingTips) {
+}

Semesterprojekt/src/main/java/thb/jeanluc/adventure/loader/dto/TutorialStepDto.java

@@ -0,0 +1,11 @@
+package thb.jeanluc.adventure.loader.dto;
+
+/** YAML representation of a tutorial step. */
+public record TutorialStepDto(
+        String instruction,
+        String expect,
+        Integer minArgs,
+        String confirm,
+        String hint
+) {
+}