docs(readme): restructure around the two ways to run the game

The README buried the "just run it" path below the Maven section and left out
several commands the game actually supports.

- Split the quick start into Weg A (prebuilt jars, Java only, works offline) and
  Weg B (Maven wrapper: test, package, exec:java@run / @gui)
- State the Java 21 prerequisite up front, with how to check it
- Note that the console version runs headless while the GUI needs a desktop, and
  where saves/ is written
- Document the missing commands: 'go to <raum>', 'save'/'speichern', and the
  skippable tutorial
- Add the scope up front (14 rooms, 19 items, 3 NPCs, 259 tests)

All commands and links in the file were executed/resolved before committing.

.gitignore

@@ -8,4 +8,7 @@ out/
 
 # OS
 .DS_Store
-Thumbs.db
+Thumbs.db
+
+# Nextcloud sync
+.sync-exclude.lst

Semesterprojekt/.gitignore

@@ -38,8 +38,13 @@ build/
 ### Mac OS ###
 .DS_Store
 
-### Brainstorming visual companion ###
-.superpowers/
-
 # Local save games and settings
 saves/
+
+# Source audio (MP3 originals); only the converted .ogg under
+# src/main/resources/music/ is tracked and bundled. Anchored so it
+# ignores the top-level source folder but not the resources path.
+/music/
+
+# Built jars (kept on disk for the submission ZIP, not tracked)
+release/*.jar

Semesterprojekt/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,3 @@
+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip

Semesterprojekt/README.md

@@ -1,95 +1,171 @@
 # Haunted Manor – Textadventure
 
-Semesterprojekt im Modul Programmierung 2 (Algorithmen und Datenstrukturen,
+Semesterprojekt im Modul Algorithmen und Datenstrukturen (2. Semester).
-2. Semester). Ein textbasiertes Adventure in Java: Der Spieler navigiert durch
+Ein textbasiertes Adventure in Java: Der Spieler navigiert durch die Räume eines
-Räume eines Spukhauses, sammelt Gegenstände, interagiert mit NPCs und löst so
+Spukhauses, sammelt Gegenstände, spricht mit NPCs, löst Rätsel und findet einen
-das Spiel.
+Weg hinaus.
 
-Die Spielwelt ist vollständig datengetrieben – Räume, Gegenstände und NPCs
+Die Spielwelt ist vollständig datengetrieben – Räume, Gegenstände, NPCs, Quests
-werden aus YAML-Dateien geladen, nicht im Code festverdrahtet.
+und Enden werden aus YAML-Dateien geladen, nicht im Code festverdrahtet.
 
-## Features
+**Umfang:** 14 Räume, 19 Gegenstände, 3 NPCs, 259 Tests.
 
-- **Navigation** durch beliebig viele Räume in den Himmelsrichtungen
+---
-- **Inventar** mit Aufnehmen (`take`) und Ablegen (`drop`) von Gegenständen
-- **Item-Hierarchie**: einfache, lesbare (`read`) und schaltbare (`use`) Gegenstände
-- **NPCs** mit Gesprächen (`talk`) und Geschenk-Reaktionen (`give`)
-- **Zwei Frontends**: klassische Konsole und Swing-GUI (Bonus)
-- **Datengetriebene Welt** aus YAML inkl. Referenzauflösung und Validierung beim Laden
 
-## Voraussetzungen
+## Schnellstart
 
-- Java 25+
+Es gibt **zwei Wege**, das Spiel zu starten. Wenn Sie nur spielen wollen, nehmen
-- Maven 3.9+
+Sie Weg A – dafür wird kein Maven benötigt.
 
-## Bauen und Testen
+### Voraussetzung
+
+**Java 21 oder neuer** (LTS). Gebaut wird gegen `maven.compiler.release=21`;
+das neueste genutzte Sprachfeature ist `List.getFirst()` (SequencedCollection,
+Java 21). Neuere JDKs (22–25) funktionieren ebenfalls.
+
+Prüfen mit:
 
 ```bash
-mvn clean test      # alle Tests ausführen (67 Tests)
+java -version
-mvn clean package   # JAR bauen
 ```
 
-## Spielen
+### Weg A – fertige JARs starten (ohne Maven)
 
-Über die im `pom.xml` konfigurierten Run-Profile des `exec-maven-plugin`:
+Im Ordner [`release/`](release/) liegen zwei eigenständige JARs, die alle
+Abhängigkeiten bereits enthalten. Es wird **nur Java** gebraucht, kein Maven,
+keine Internetverbindung:
 
 ```bash
-mvn exec:java@run   # Konsolen-Version (thb.jeanluc.adventure.App)
+java -jar release/HauntedManor-Console.jar   # Konsolen-Version (~5 MB)
-mvn exec:java@gui   # Swing-GUI    (thb.jeanluc.adventure.AppGui)
+java -jar release/HauntedManor-GUI.jar       # Swing-GUI       (~17 MB)
 ```
 
-`mvn exec:java` ohne Profil startet ebenfalls die Konsolen-Version.
+- Die **Konsolen-Version** läuft in jedem Terminal, auch ohne grafische
+  Oberfläche.
+- Die **GUI-Version** (Bonus) braucht einen Desktop und spielt zusätzlich
+  Hintergrundmusik. Die Konsolen-JAR enthält weder die Musikdateien noch die
+  OGG-Bibliotheken – im Textmodus gibt es keine Musik, daher sind sie dort
+  weggelassen.
 
-### Befehle im Spiel
+### Weg B – mit Maven bauen und starten
 
-| Befehl | Aliase | Wirkung |
+Der mitgelieferte **Maven Wrapper** (`./mvnw`) lädt die passende Maven-Version
+beim ersten Aufruf selbst herunter – eine separate Maven-Installation ist nicht
+nötig. Unter Windows `mvnw.cmd` statt `./mvnw` verwenden. Ein systemweit
+installiertes `mvn` funktioniert identisch.
+
+```bash
+./mvnw clean test        # alle 259 Tests ausführen
+./mvnw clean package     # baut beide JARs neu nach release/
+
+./mvnw exec:java@run     # Konsolen-Version starten (thb.jeanluc.adventure.App)
+./mvnw exec:java@gui     # Swing-GUI starten        (thb.jeanluc.adventure.AppGui)
+```
+
+`./mvnw exec:java` ohne Profil startet ebenfalls die Konsolen-Version.
+
+> **Hinweis:** Der erste Maven-Aufruf lädt die Abhängigkeiten (Jackson, Lombok,
+> JUnit, Logback) aus dem Internet. Wer offline ist, nimmt Weg A.
+
+Speicherstände und Einstellungen legt das Spiel in einem Ordner `saves/` neben
+dem Arbeitsverzeichnis an, aus dem es gestartet wurde.
+
+---
+
+## Befehle im Spiel
+
+Befehle funktionieren auf **Englisch und Deutsch** – die deutschen Beispiele aus
+der Aufgabenstellung (`Gehe nach Norden`, `Nimm Brief`, `Lies Brief`,
+`Benutze Schaufel`) laufen also direkt. Gegenstands-IDs bleiben englisch
+(`letter`, `shovel`), Himmelsrichtungen verstehen beide Sprachen
+(`north` / `norden`).
+
+| Befehl | Aliase | Deutsch | Wirkung |
+|---|---|---|---|
+| `go <richtung>` | `move`, `walk` | `gehe`, `geh` | In eine Himmelsrichtung gehen |
+| `go to <raum>` | | | Automatisch zu einem bekannten Raum laufen |
+| `look` | `l` | `schau`, `umsehen` | Aktuellen Raum beschreiben |
+| `map` | `m` | `karte` | Karte der erkundeten Räume anzeigen |
+| `quests` | `log`, `journal` | `aufgaben` | Aktive und erledigte Quests anzeigen |
+| `inventory` | `inv`, `i` | `inventar` | Inventar anzeigen |
+| `take <item>` | `pick`, `get` | `nimm`, `nehme` | Gegenstand aufnehmen |
+| `drop <item>` | `put` | `lege`, `ablegen` | Gegenstand ablegen |
+| `use <item>` | | `benutze` | Gegenstand benutzen / schalten |
+| `use <a> on <b>` | | | Zwei Gegenstände kombinieren |
+| `read <item>` | | `lies`, `lese` | Lesbaren Gegenstand lesen |
+| `examine <item>` | `x`, `inspect` | `untersuche` | Gegenstand genauer ansehen |
+| `talk <npc>` | `speak` | `rede`, `sprich` | Mit einem NPC sprechen |
+| `give <item> <npc>` | | `gib` | NPC einen Gegenstand geben |
+| `save` | | `speichern` | Spielstand speichern |
+| `help` | `?` | `hilfe` | Befehlsübersicht anzeigen |
+| `quit` | `exit` | `beenden` | Speichern und zurück ins Hauptmenü |
+
+Zu Beginn führt ein kurzes, überspringbares Tutorial (`skip`) durch die
+wichtigsten Befehle.
+
+---
+
+## Wo die Aufgabenstellung umgesetzt ist
+
+| Anforderung | Wo im Code | Umsetzung |
 |---|---|---|
-| `go <richtung>` | `move`, `walk` | In eine Himmelsrichtung gehen |
+| **Raum-Klasse + Navigation**, mind. 4 Räume | [`model/Room.java`](src/main/java/thb/jeanluc/adventure/model/Room.java), [`model/Direction.java`](src/main/java/thb/jeanluc/adventure/model/Direction.java) | **14 Räume.** `Room` hält direkte Referenzen auf seine Nachbarräume in einer `EnumMap<Direction, Room>` – ein echter Objektgraph, keine String-IDs. |
-| `look` | `l` | Aktuellen Raum beschreiben |
+| **`gehen`-Befehl** (Tipp: switch / if-else / HashMap) | [`command/CommandRegistry.java`](src/main/java/thb/jeanluc/adventure/command/CommandRegistry.java), [`command/impl/GoCommand.java`](src/main/java/thb/jeanluc/adventure/command/impl/GoCommand.java) | Dispatch über `HashMap<String, Command>` (O(1); Aliase = mehrere Keys auf dieselbe Instanz, statt eines wachsenden `switch`). Die Richtung danach O(1) per `EnumMap`-Lookup. |
-| `map` | `m` | Karte der erkundeten Räume anzeigen |
+| **Gegenstände + Inventar**, mind. 3 Items | [`model/Player.java`](src/main/java/thb/jeanluc/adventure/model/Player.java), [`model/item/`](src/main/java/thb/jeanluc/adventure/model/item/) | **19 Gegenstände.** Inventar = `LinkedHashMap<String, Item>` (O(1)-Zugriff *und* stabile Anzeigereihenfolge). Hierarchie: `PlainItem`, `ReadableItem`, `SwitchableItem`. |
-| `quests` | `log`, `journal` | Aktive und erledigte Quests anzeigen |
+| **Aufnehmen / Ablegen / Benutzen / Lesen** | [`command/impl/`](src/main/java/thb/jeanluc/adventure/command/impl/) | `TakeCommand`, `DropCommand`, `UseCommand`, `ReadCommand` – inklusive `letter` („Brief") und `shovel` („Schaufel") aus den Beispielen der Aufgabenstellung. |
-| `inventory` | `inv`, `i` | Inventar anzeigen |
+| **Wahl der Datenstrukturen** | [`docs/data-structures.md`](docs/data-structures.md) | Begründung je Anwendungsfall, plus Tabelle „Bewusst NICHT gewählt". |
-| `take <item>` | `pick`, `get` | Gegenstand aufnehmen |
+| **NPCs** (Bonus) | [`model/Npc.java`](src/main/java/thb/jeanluc/adventure/model/Npc.java) | 3 NPCs, die auf den Spielerzustand **reagieren** (`talk`, `give`). |
-| `drop <item>` | `put` | Gegenstand ablegen |
+| **Swing-GUI** (Bonus) | [`io/SwingIO.java`](src/main/java/thb/jeanluc/adventure/io/SwingIO.java) | `JTextField` für die Eingabe (siehe Hinweis unten). |
-| `use <item>` | | Gegenstand benutzen / schalten |
+| **Javadoc** | gesamtes `src/main/java` | An Klassen, Methoden und Instanzvariablen. |
-| `read <item>` | | Lesbaren Gegenstand lesen |
+
-| `examine <item>` | `x`, `inspect` | Gegenstand genauer ansehen |
+**Hinweis zur GUI:** Die Aufgabe nennt `JTextField` **und** `JTextArea`. Die
-| `talk <npc>` | `speak` | Mit einem NPC sprechen |
+Eingabe ist wie gefordert ein `JTextField`. Für die **Ausgabe** wird bewusst ein
-| `give <item> <npc>` | | NPC einen Gegenstand geben |
+`JTextPane` statt einer `JTextArea` verwendet: `JTextArea` kann ausschließlich
-| `help` | `?` | Befehlsübersicht anzeigen |
+unformatierten Text darstellen, das Spiel rendert aber farbig gestylte Ausgabe
-| `quit` | `exit` | Spiel beenden |
+(`StyledText` → `StyledDocument`), damit Raumnamen, Gegenstände und Hinweise
+optisch unterscheidbar sind. `JTextPane` ist dafür die passende Swing-Komponente
+und funktional eine Obermenge von `JTextArea`.
+
+---
 
 ## Projektstruktur
 
 ```
 Semesterprojekt/
 ├── src/main/java/thb/jeanluc/adventure/
-│   ├── App.java            - Einstiegspunkt Konsole
+│   ├── App.java            – Einstiegspunkt Konsole
-│   ├── AppGui.java         - Einstiegspunkt Swing-GUI
+│   ├── AppGui.java         – Einstiegspunkt Swing-GUI
-│   ├── command/            - Befehlsparser, Registry + Command-Implementierungen
+│   ├── model/              – Domänenmodell: Room, Player, Npc, item/ …
-│   ├── game/               - Spielschleife (Game) und Kontext (GameContext)
+│   ├── command/            – Parser, Registry + impl/ (15 Kommandos)
-│   ├── io/                 - GameIO-Abstraktion: ConsoleIO, SwingIO
+│   ├── game/               – Spielschleife, Engines, Light, Pathfinder, MapLayout
-│   ├── loader/             - YAML-Laden: DTOs, Factories, Resolver, Validator
+│   ├── io/                 – GameIO-Abstraktion: ConsoleIO, SwingIO + text/
-│   └── model/              - Domänenmodell: Room, World, Player, Npc, Item-Hierarchie
+│   ├── loader/             – YAML-Laden: dto/, Factories, Resolver, Validator
+│   ├── save/               – Speicherstände und Einstellungen (JSON)
+│   └── menu/               – Hauptmenü und Einstellungen
 ├── src/main/resources/world/
-│   ├── game.yaml           - Metadaten (Titel, Startraum, Begrüßung)
+│   ├── game.yaml           – Metadaten (Titel, Startraum, Begrüßung)
-│   ├── rooms.yaml          - Räume mit Ausgängen, Items, NPCs
+│   ├── rooms.yaml          – Räume mit Ausgängen, Gegenständen, NPCs
-│   ├── items.yaml          - Gegenstände
+│   ├── items.yaml          – Gegenstände
-│   └── npcs.yaml           - NPCs und ihre Reaktionen
+│   ├── npcs.yaml           – NPCs und ihre Reaktionen
-└── docs/                   - Design- und Architekturdokumentation
+│   ├── quests.yaml         – Quests und ihre Stufen
+│   ├── endings.yaml        – Spielenden
+│   └── combinations.yaml   – Gegenstands-Kombinationen (`use X on Y`)
+├── src/test/java/          – 259 Tests (JUnit 5 + AssertJ)
+├── release/                – fertig gebaute JARs (Console + GUI)
+└── docs/                   – Design- und Architekturdokumentation
 ```
 
 ## Technologie-Stack
 
-- **Java 25**
+- **Java 21 (LTS)**
 - **Jackson** (YAML) für das Laden der Spielwelt
 - **Lombok** zur Reduktion von Boilerplate
-- **JUnit 5 + AssertJ + Mockito** für Tests
+- **JUnit 5 + AssertJ + Mockito** für die Tests
 - **SLF4J + Logback** für Logging
 - **Swing** für die GUI (Bonus)
 
 ## Dokumentation
 
 Ausführliche Design- und Architekturdokumentation liegt unter
-[`docs/`](docs/README.md): Package-Struktur, Datenstrukturen, Item-Modell,
+[`docs/`](docs/README.md): Package-Struktur, Wahl der Datenstrukturen,
-YAML-Schemas, Lade-Ablauf, Befehle und NPC-Modell.
+Item-Modell, Befehle, NPC-Modell, YAML-Schemas und Lade-Ablauf.

Semesterprojekt/docs/README.md

@@ -1,33 +1,36 @@
 # Semesterprojekt – Textadventure
 
-Design- und Architekturdokumentation. Dient als Spec während der Implementierung.
+Design- und Architekturdokumentation. Bedienung und Build stehen im
+[Haupt-README](../README.md).
 
 ## Inhalt
 
 | Datei | Inhalt |
 |---|---|
 | [architecture.md](architecture.md) | Package-Struktur, Schichten, DTO-vs-Domain-Trennung |
-| [conventions.md](conventions.md) | Sprache, ID-Format, Naming, Lombok-Cheatsheet |
 | [data-structures.md](data-structures.md) | Alle gewählten Collection-Typen mit Begründung |
+| [conventions.md](conventions.md) | Sprache, ID-Format, Naming, Lombok-Cheatsheet |
 | [item-model.md](item-model.md) | Item-Hierarchie (abstract + 3 Subtypen), Lombok-Inheritance |
-| [yaml-schemas.md](yaml-schemas.md) | Schemas für `items.yaml`, `rooms.yaml`, `npcs.yaml`, `game.yaml` |
-| [loading-flow.md](loading-flow.md) | Lade-Reihenfolge, Referenz-Auflösung, Validierung |
 | [commands.md](commands.md) | Befehlsparser, Command-Pattern, Befehlsliste |
 | [npcs.md](npcs.md) | NPC-Modell, Talk- und Give-Interaktion |
-| [implementation-status.md](implementation-status.md) | Aktueller Stand, Phasen-Checkliste, festgelegte Entscheidungen |
+| [yaml-schemas.md](yaml-schemas.md) | Schemas der YAML-Dateien unter `resources/world/` |
+| [loading-flow.md](loading-flow.md) | Lade-Reihenfolge, Referenz-Auflösung, Validierung |
+| [music.md](music.md) | Hintergrundmusik in der GUI (Bonus) |
 
 ## Pflicht vs. Optional (laut Aufgabenstellung)
 
-- **Pflicht:** ≥4 Räume mit Navigation, ≥3 Gegenstände mit Inventar
+- **Pflicht:** ≥ 4 Räume mit Navigation, ≥ 3 Gegenstände mit Inventar —
-- **Optional/Bonus:** NPCs, Swing-GUI
+  erfüllt mit 14 Räumen und 19 Gegenständen.
+- **Optional/Bonus:** NPCs (3) und Swing-GUI — beides umgesetzt.
 
-Beide optionalen Teile sind hier eingeplant.
+Welche Klasse welche Anforderung umsetzt, steht als Tabelle im
+[Haupt-README](../README.md).
 
 ## Technologie-Stack
 
-- Java 25
+- Java 21 (LTS)
-- Jackson (YAML) für Daten-Loading
+- Jackson (YAML) für das Laden der Spielwelt
-- Lombok für Boilerplate-Reduktion
+- Lombok zur Reduktion von Boilerplate
 - JUnit 5 + AssertJ + Mockito für Tests
-- Logback + SLF4J für Logging
+- SLF4J + Logback für Logging
-- Swing für GUI (Bonus)
+- Swing für die GUI (Bonus)

Semesterprojekt/docs/architecture.md

@@ -33,19 +33,22 @@ flowchart LR
     model --> item
     item --> item_files["Item (abstract)<br/>ReadableItem<br/>SwitchableItem<br/>PlainItem"]
 
-    loader --> loader_files["WorldLoader<br/>ReferenceResolver<br/>WorldValidator"]
+    loader --> loader_files["WorldLoader<br/>ReferenceResolver<br/>WorldValidator<br/>*Factory"]
     loader --> dto
-    dto --> dto_files["RoomDto, ItemDto,<br/>NpcDto, GameDto"]
+    dto --> dto_files["RoomDto, ItemDto,<br/>NpcDto, GameDto,<br/>QuestDto, EndingDto, …"]
 
     command --> cmd_core["Command (Interface)<br/>CommandRegistry<br/>CommandParser"]
     command --> impl
-    impl --> impl_files["GoCommand, TakeCommand,<br/>DropCommand, UseCommand,<br/>InventoryCommand, LookCommand,<br/>TalkCommand, GiveCommand,<br/>HelpCommand, QuitCommand"]
+    impl --> impl_files["GoCommand, TakeCommand,<br/>DropCommand, UseCommand,<br/>ReadCommand, ExamineCommand,<br/>InventoryCommand, LookCommand,<br/>TalkCommand, GiveCommand,<br/>MapCommand, QuestsCommand,<br/>SaveCommand, MenuCommand,<br/>HelpCommand"]
 
-    game --> game_files["Game (Loop)<br/>GameContext"]
+    game --> game_files["Game (Loop)<br/>GameContext/Session/State<br/>QuestEngine, EndingEngine,<br/>EscortEngine, Light,<br/>Pathfinder, MapLayout"]
 
-    io --> io_files["GameIO (Interface)<br/>ConsoleIO<br/>SwingIO"]
+    io --> io_files["GameIO (Interface)<br/>ConsoleIO<br/>SwingIO<br/>io.text (Styled Output)"]
 ```
 
+> **Hinweis:** Es gibt **keine** `QuitCommand`-Klasse. `quit`/`exit`/`beenden` sind Aliase,
+> die in `App` auf `MenuCommand` registriert werden (siehe `App.play`).
+
 ## DTO vs. Domain-Trennung
 
 **Kernprinzip:** YAML wird in Records deserialisiert (DTOs), erst danach werden String-IDs zu Objekt-Referenzen aufgelöst.
@@ -67,15 +70,15 @@ flowchart LR
 ## Game-Loop (vereinfacht)
 
 ```java
-while (!game.isOver()) {
+while (running) {
-    String input = io.read();
+    String input = io.readLine();
+    if (input == null) break;                       // EOF
     ParsedCommand parsed = parser.parse(input);
-    Command cmd = registry.get(parsed.verb());
+    registry.find(parsed.verb()).ifPresentOrElse(
-    if (cmd == null) {
+            cmd -> cmd.execute(ctx, parsed.args()),
-        io.write("Unbekannter Befehl.");
+            () -> io.write("I don't understand '" + parsed.verb() + "'."));
-    } else {
+    publishHud();                                   // Engines ticken, HUD/Map/Quests updaten
-        cmd.execute(context, parsed.args());
+    maybeEnd();                                     // Ending-Bedingungen prüfen
-    }
 }
 ```
 
@@ -85,9 +88,25 @@ Konsole und GUI teilen sich `GameIO`:
 
 ```java
 public interface GameIO {
-    String read();             // blockierende Leseoperation
+    String readLine();                 // blockierende Leseoperation
-    void write(String text);
+    void print(StyledText text);       // einzige Ausgabe-Primitive
+
+    // Convenience + Presentation-Hooks als default-Methoden:
+    default void write(String text) { … }   // Kurzform für ungestylten Text
+    default void showRoom(RoomView v) { … }
+    default void setHud(Hud hud) { … }
+    default void setMap(MapView map) { … }
+    default void setQuests(QuestView quests) { … }
+    default void setMusic(String track) { … }
+    default int choose(String title, List<String> options) { … }
+    default void shutdown() { … }
 }
 ```
 
-Damit ist der Game-Loop **identisch** für beide Modi. `SwingIO` blockiert intern mit einer `BlockingQueue<String>`, die vom JTextField-ActionListener gefüllt wird.
+Ausgabe läuft **immer** über `print(StyledText)` — eine Liste von `Span`s mit `Style`.
+`ConsoleIO` rendert sie als ANSI-Farben (oder ASCII, je nach Settings), `SwingIO` als
+`StyledDocument` im `JTextPane`. Die `default`-Methoden geben der GUI Extra-Hooks
+(Karte, Quest-Panel, Musik), die die Konsole schlicht ignoriert oder als Text ausgibt.
+
+Damit ist der Game-Loop **identisch** für beide Modi. `SwingIO` blockiert intern mit einer
+`LinkedBlockingQueue<String>`, die vom JTextField-ActionListener gefüllt wird.

Semesterprojekt/docs/conventions.md

@@ -32,24 +32,28 @@ Geltungsbereich: id ist eindeutig **innerhalb seiner Entitätsart**. Ein Item un
 
 ```
 thb.jeanluc.adventure
+├── App, AppGui           <- Entry Points (Konsole / Swing)
 ├── model
-│   ├── Direction
+│   ├── Direction, Room, Player, Npc
-│   ├── Room
+│   ├── Quest, QuestStage, Ending, Combination, Condition, Effect, …
-│   ├── Player
-│   ├── Npc
 │   └── item              <- eigener Subpackage wegen Hierarchie
 │       ├── Item (abstract)
 │       ├── ReadableItem
 │       ├── SwitchableItem
 │       └── PlainItem
-├── io
+├── io                    <- ConsoleIO, SwingIO, GameIO, Music*, MapPanel, QuestPanel
-├── command
+│   └── text              <- StyledText, Style, Span, Hud, *View (15 Klassen)
-├── game
+├── command               <- Command, CommandParser, CommandRegistry, ParsedCommand
-└── loader
+│   └── impl              <- die 15 konkreten Kommandos
-    └── dto
+├── game                  <- Game-Loop, Engines (Quest, Ending, Escort), Light,
+│                            Pathfinder, MapLayout, GameState/Session/Context
+├── loader
+│   └── dto               <- die YAML-Records
+├── save                  <- SaveService, SaveCodec, SaveData, Settings*
+└── menu                  <- MainMenu, SettingsMenu, MenuAction
 ```
 
-**Wann ein Subpackage:** wenn eine Klassenfamilie ≥ 3 Klassen umfasst und eine eigene Abstraktion bildet (`item`, evtl. später `command.impl`). Sonst flach lassen.
+**Wann ein Subpackage:** wenn eine Klassenfamilie ≥ 3 Klassen umfasst und eine eigene Abstraktion bildet. Erfüllt von `item` (4), `command.impl` (15), `io.text` (15), `loader.dto` (16), `save` (7), `menu` (3). Sonst flach lassen — `MapLayout` liegt deshalb in `game` neben `Pathfinder` und **nicht** in einem eigenen `map`-Package (eine Klasse reicht nicht).
 
 ## Naming
 

Semesterprojekt/docs/data-structures.md

@@ -15,13 +15,16 @@ Bewusste Wahl jeder Collection — der Dozent bewertet das laut Aufgabenstellung
 | Spieler-Inventar | `LinkedHashMap<String, Item>` | O(1) |
 | Befehlsregistry | `HashMap<String, Command>` | O(1) |
 | NPC-Reaktionen | `HashMap<String, NpcReaction>` | O(1) |
-| Eingabehistorie (optional) | `ArrayDeque<String>` | O(1) Front/Back |
+| Besuchte Räume (für die Karte) | `LinkedHashSet<String>` | O(1) + Besuchsreihenfolge |
+| BFS-Queue (Pathfinder, MapLayout) | `ArrayDeque<Room>` | O(1) FIFO |
+| BFS-Pfadrekonstruktion | `LinkedList<Room>` | O(1) `addFirst` |
+| GUI-Eingabebrücke (EDT → Worker) | `LinkedBlockingQueue<String>` | blockierend, unbegrenzt |
 
 ## Begründungen im Detail
 
 ### `EnumMap<Direction, Room>` für Raum-Ausgänge
 
-- **Direction** ist Enum (`NORTH`, `SOUTH`, `EAST`, `WEST`, evtl. `UP`, `DOWN`)
+- **Direction** ist Enum (`NORTH`, `SOUTH`, `EAST`, `WEST`)
 - `EnumMap` ist array-backed, kein Hashing nötig → schneller und kompakter als `HashMap`
 - Iteration in Enum-Deklarationsreihenfolge (stabil)
 
@@ -49,11 +52,19 @@ Entscheidung "keine Stapel" (1 Item pro id) macht das Map-basierte Modell sauber
 - Entspricht dem expliziten Tipp aus der Aufgabenstellung
 - Vermeidet wachsendes `switch`-Statement
 
-### `ArrayDeque<String>` für Historie (optional)
+### `ArrayDeque<Room>` als BFS-Queue
 
-- Falls Up-Arrow in der GUI gewünscht oder Befehlsverlauf
+- `Pathfinder` (Auto-Travel `go to <raum>`) und `MapLayout` (Karten-Layout) sind beides
-- `ArrayDeque` ist `LinkedList` praktisch immer überlegen (bessere Cache-Lokalität, weniger Overhead)
+  Breitensuchen → brauchen eine **FIFO-Queue**
-- Beidseitige O(1)-Operationen
+- `ArrayDeque` ist die Standardwahl dafür: O(1) an beiden Enden, keine Node-Allokation
+  wie bei `LinkedList`, bessere Cache-Lokalität
+
+### `LinkedList<Room>` für die Pfadrekonstruktion
+
+Die eine Stelle, an der `LinkedList` die richtige Wahl ist (`Pathfinder`):
+Nach der BFS läuft man über `cameFrom` **rückwärts** vom Ziel zum Start und will den
+Pfad in Vorwärtsreihenfolge. `addFirst()` ist bei `LinkedList` O(1) — bei `ArrayList`
+wäre `add(0, x)` O(n), weil alles verschoben werden müsste.
 
 ## Bewusst NICHT gewählt
 
@@ -62,7 +73,7 @@ Entscheidung "keine Stapel" (1 Item pro id) macht das Map-basierte Modell sauber
 | `ArrayList<Item>` für Inventar | O(n)-Lookup, Duplikat-Handling nötig |
 | `HashMap<String, Item>` für Inventar | Anzeige-Reihenfolge instabil |
 | `TreeMap` irgendwo | Keine sortierte Iteration nötig, O(log n) ohne Nutzen |
-| `LinkedList` | `ArrayDeque` ist fast immer besser |
+| `LinkedList` als Queue | dafür ist `ArrayDeque` besser (s.o.) — als `addFirst`-Liste in der Pfadrekonstruktion aber sehr wohl genutzt |
 | `Vector` / `Hashtable` | Legacy, synchronisiert (nicht gebraucht), langsamer |
 | `Map<String, String>` für Exits in Domain | Direction sollte Enum sein, nicht String |
 
@@ -70,4 +81,9 @@ Entscheidung "keine Stapel" (1 Item pro id) macht das Map-basierte Modell sauber
 
 Single-threaded: Game-Loop liest, dispatcht, schreibt — keine parallelen Mutationen.
 
-**Ausnahme:** Bei Swing-GUI läuft Input über den Event-Dispatch-Thread, der Game-Loop in einem Worker-Thread. Hier kommt `BlockingQueue<String>` (`ArrayBlockingQueue` reicht) als Brücke ins Spiel — siehe [architecture.md](architecture.md).
+**Ausnahme:** Bei Swing-GUI läuft Input über den Event-Dispatch-Thread, der Game-Loop in
+einem Worker-Thread. Als Brücke dient eine `LinkedBlockingQueue<String>` (`SwingIO`):
+Der `JTextField`-ActionListener (EDT) legt die Zeile ab, der Worker blockiert in
+`take()`. Unbegrenzt statt `ArrayBlockingQueue`, weil es keine sinnvolle Obergrenze für
+getippte Zeilen gibt und ein volles `offer()` Eingaben verlieren würde — siehe
+[architecture.md](architecture.md).

Semesterprojekt/docs/enhancement-ideas.md

@@ -1,215 +0,0 @@
-# Enhancement-Ideen (Backlog)
-
-> Roh-Sammlung von Ausbau-Ideen über die Abgabe hinaus. Lebendes Dokument –
-> noch kein Design, noch keine Festlegung. Wird in Teilprojekte zerlegt und
-> nacheinander über den Brainstorming → Spec → Plan → Implementierung-Zyklus
-> verfeinert.
-
-Stand: 2026-05-31. Ausgangslage: Pflichtumfang ("bare minimum") erfüllt,
-alle Phasen 1–7 grün. Ziel: deutlich mehr Tiefe und Politur.
-
-## Leitziele
-
-- **Reichere Ausgabe** statt nacktem Konsolentext – sowohl Konsole als auch GUI.
-- **GUI soll noch mehr bieten** als die Konsole (mehr Raum für visuelle Mittel).
-- **~60 Minuten Spielzeit** anpeilen. Viel mehr Inhalt, viel mehr zu tun.
-- Bestehendes **NPC-System zu einem tieferen Quest-System** ausbauen.
-
-## Themenblöcke
-
-### 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).
-- **Konsole**: ANSI-Farben, Box-Drawing-Zeichen für Rahmen, evtl. ASCII-Art /
-  Banner für Räume oder Spielstart.
-- **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
-  Spielers installiert sein, sonst Tofu-Kästchen.
-- Offene Frage: gute Lösung finden, damit es überall funktioniert.
-- Erste Gedanken:
-  - **GUI**: Font ließe sich *mitliefern* (`.ttf` in Resources, via
-    `Font.createFont` laden) → Installationsproblem entfällt für die GUI.
-  - **Konsole**: Font nicht kontrollierbar → gestufte Fallbacks
-    (reines ASCII → Unicode-Box-Drawing → Nerd-Glyphen) statt harter Annahme.
-
-### 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).
-- Offene Fragen: nur bereits besuchte Räume zeigen? aktuelle Position markieren?
-  fester Grundriss oder dynamisch aus den Exits berechnet?
-
-### 4. Gameplay-Ausbau (Inhalt)
-
-- Deutlich mehr Räume, Items, NPCs.
-- Mehr zu *tun*: Rätsel, Mechaniken, Abhängigkeiten zwischen Objekten.
-- Zielgröße: ~60 Min. Spielzeit (laut Annahme machbar, da überwiegend Text).
-
-### 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
-vielfach kombinieren, statt vieler Einzel-Gimmicks. Ein 60-Min-Spiel soll
-*designt* wirken, nicht gestreckt.
-
-**Hauptziel:** *Den Strom wieder anschalten* (`power_on`). Der Weg dahin ist eine
-**Quest-Kette, die den Spieler Raum für Raum führt** (Raum X freischalten → führt
-zu Raum Y → … → Generator/Sicherungskasten). Das Hauptziel selbst ist das Ende
-des Bogens; einzelne Teilziele schalten je den nächsten Bereich frei.
-
-**Mechanik-Spine (5 Bausteine, die sich kombinieren):**
-
-1. **World-Flags / Zustand** – Rückgrat (`power_on`, `cellar_drained`,
-   `ghost_banished`). Beschreibungen, Exits und NPC-Reaktionen lesen/schreiben sie.
-2. **Verschlossene Exits & Schalter** – Türen brauchen Schlüssel *oder* Flag;
-   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).
-5. **Quest-Ketten + mehrere Enden** – Teilziele referenzieren Flags; Kette
-   abschließen = Win; *welche* Flags gesetzt sind, entscheidet das Ende.
-
-**Beispiel-Puzzle (zeigt das Stapeln):** *Strom wiederherstellen* – Sicherung im
-gefluteten Keller; erst Ventil → `cellar_drained`; Sicherung einsetzen → Schalter
-→ `power_on` → oberes Stockwerk/Tür öffnet sich. Ein Puzzle, drei Mechaniken,
-schaltet einen ganzen Flügel frei.
-
-*Weitere Puzzle-Ideen im Backlog (optional, nach Bedarf):* Zahlenschloss mit
-Code aus Lore, Caesar-Chiffre-Brief (`decode`), Geist bannen (Reliquien-Fetch),
-Melodie-/Sequenz-Rätsel, dunkler Gang. Resource-Meter (Sanity/Öl) **offen** –
-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.
-- **Settings-Untermenü**: z.B. Farben an/aus, Typewriter-Tempo, Musik-Lautstärke
-  an/aus, ASCII vs. Unicode.
-- Sollte in beiden Modi funktionieren: Konsole = nummeriertes Textmenü, GUI =
-  Buttons/Liste. Architektur: Menü-Schicht *oberhalb* des Game-Loops.
-
-### 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)
-
-- Hintergrundmusik **nur in der GUI**.
-- **Pro Raum definierbar via YAML**: in `rooms.yaml` ein optionales Feld
-  (z.B. `music: <dateiname>`), Dateien in *einem* Ordner.
-- **Dateigröße** ist ein Thema → Lösungsrichtung:
-  - Audiodateien **nicht** in JAR/Repo bündeln, sondern externer `music/`-Ordner;
-    Audio ggf. via `.gitignore` ausschließen + dokumentieren, wo Dateien hinkommen.
-  - **Komprimierte Formate** (OGG/MP3) statt WAV, **gestreamt** statt komplett geladen.
-  - Bibliothek erlaubt → kleinen Audio-Decoder einbinden (Java `javax.sound` kann
-    OGG/MP3 nicht nativ).
-  - Loop pro Track, sanfter Wechsel beim Raumwechsel, graceful fallback bei
-    fehlender Datei, Lautstärke aus den Settings.
-  - Architektur: `MusicPlayer`-Komponente hinter Interface; Konsole = No-Op.
-
-## Festgelegte Erweiterungs-Entscheidungen
-
-> **Pathfinding** (BFS `go to <raum>`, Trie-Autocomplete) bleibt für eine
-> spätere Runde im Scope.
-
-| Entscheidung | Wert |
-|---|---|
-| Eigene `uebung`-Datenstrukturen verwenden? | **Nein** – Standard-Collections (vom Prof bestätigt) |
-| Algorithmen-Showcase | weiterhin willkommen, aber mit Standard-Datenstrukturen (z.B. BFS `go to <raum>`, Trie-Autocomplete) |
-| Bibliotheken erlaubt? | **Ja** (Pflichtteil war bewusst ohne; Erweiterung darf welche nutzen) |
-| Hauptmenü | ja: Neues Spiel / Laden / Settings / Beenden |
-| Speichern/Laden | ja, mehrere benannte Spielstände |
-| Musik | ja, **nur GUI**, pro Raum via YAML, externer Ordner, komprimiert + gestreamt |
-
-## Offene Designfragen (zu klären)
-
-- Wie weit darf die `GameIO`-Abstraktion aufgebohrt werden, ohne dass Konsole
-  und GUI auseinanderlaufen? (Gemeinsamer Loop ist ein Kernwert der Architektur.)
-- Bleibt alles datengetrieben (YAML), auch Quests und Map-Layout?
-- Reihenfolge / Abhängigkeiten der Teilprojekte.
-
----
-
-*Notiz: Datengetriebenheit (YAML), getrennte DTO/Domain-Schicht und ein für
-beide Frontends identischer Game-Loop sind etablierte Architekturwerte – neue
-Features sollten sie respektieren, nicht umgehen.*

Semesterprojekt/docs/implementation-status.md

@@ -1,135 +0,0 @@
-# Implementierungsstand & Reihenfolge
-
-Stand: alle Phasen 1–7 implementiert, 67 Tests grün, End-to-End-Smoke-Test des Walking-Skeletons + YAML-Load erfolgreich.
-
-## Phasen-Überblick
-
-```mermaid
-flowchart TD
-    P1["Phase 1<br/>Domain-Fundament"]
-    P2["Phase 2<br/>Command-Schicht"]
-    P3["Phase 3<br/>Walking Skeleton<br/>(Konsole + handgebaute Welt)"]
-    P4["Phase 4<br/>YAML-Loading + Validator"]
-    P5["Phase 5<br/>Restliche Commands"]
-    P6["Phase 6<br/>NPCs end-to-end"]
-    P7["Phase 7<br/>Swing-GUI (Bonus)"]
-
-    P1 --> P2 --> P3 --> P4 --> P5 --> P6 --> P7
-```
-
-## Checkliste Phase 1: Domain
-
-- [x] `Direction` (`model.Direction`)
-- [x] `Room` (`model.Room`)
-- [x] `Item` abstract (`model.item.Item`) mit `abstract use(GameContext)`
-- [x] `Npc` (`model.Npc`) inklusive `shell()`-Factory und `putReaction()`
-- [x] `NpcReaction` (`model.NpcReaction`)
-- [x] `GameIO` interface (`io.GameIO`)
-- [x] `Player` (`model.Player`)
-- [x] `World` (`model.World`)
-- [x] `GameContext` (`game.GameContext`)
-- [x] `ReadableItem` (`model.item.ReadableItem`)
-- [x] `SwitchableItem` (`model.item.SwitchableItem`)
-- [x] `PlainItem` (`model.item.PlainItem`)
-
-## Checkliste Phase 2: Commands
-
-- [x] `Command` interface (`command.Command`)
-- [x] `ParsedCommand` (record)
-- [x] `CommandRegistry` (`command.CommandRegistry`)
-- [x] `CommandParser` (`command.CommandParser`) mit Filler-Words
-- [x] `LookCommand`
-- [x] `GoCommand`
-- [x] `InventoryCommand`
-
-## Checkliste Phase 3: Walking Skeleton
-
-- [x] `ConsoleIO`
-- [x] `Game` (Loop)
-- [x] `App.main` (lädt sofort über YAML; der Walking-Skeleton-Zustand mit hartkodierter Welt wurde übersprungen, weil YAML-Load und Loop schon zusammen funktionieren)
-- [x] Probelauf: `look`, `go north`, `inventory` (siehe `GameTest`, `LookCommandTest`)
-
-## Checkliste Phase 4: YAML-Loading
-
-- [x] DTOs: `GameDto`, `ItemDto`, `RoomDto`, `NpcDto`, `ReactionDto`
-- [x] Test-Fixtures unter `src/test/resources/world/`
-- [x] `WorldLoader` (Happy-Path)
-- [x] `ReferenceResolver`
-- [x] `WorldValidator` (eine Validierungsregel pro Test)
-- [x] Echte Welt-YAMLs unter `src/main/resources/world/`
-- [x] `App.main` läuft direkt gegen YAML-Load
-
-## Checkliste Phase 5: Restliche Commands
-
-- [x] `TakeCommand`
-- [x] `DropCommand`
-- [x] `UseCommand`
-- [x] `ReadCommand`
-- [x] `ExamineCommand`
-- [x] `HelpCommand`
-- [x] `QuitCommand`
-
-## Checkliste Phase 6: NPCs
-
-- [x] `Npc` voll ausgebaut (greeting, reactions)
-- [x] `NpcReaction`
-- [x] `TalkCommand`
-- [x] `GiveCommand`
-- [x] NPCs in `WorldLoader` integriert
-- [x] End-to-End-Test: Lampe geben → Schlüssel bekommen (`TalkGiveCommandTest`)
-
-## Checkliste Phase 7: Swing-GUI
-
-- [x] `SwingIO` mit `LinkedBlockingQueue`-Brücke
-- [x] `AppGui.main`
-- [x] Game-Loop in Worker-Thread
-
-## Build & Run
-
-```sh
-mvn test                                                # 67 Tests
-mvn -DskipTests exec:java -Dexec.mainClass=thb.jeanluc.adventure.App      # Konsole
-mvn -DskipTests exec:java -Dexec.mainClass=thb.jeanluc.adventure.AppGui   # Swing
-```
-
-## Festgelegte Designentscheidungen
-
-Nicht mehr offen, nicht nochmal diskutieren:
-
-| Entscheidung | Wert |
-|---|---|
-| Item-Hierarchie | abstract Item + ReadableItem/SwitchableItem/PlainItem |
-| Item-Package | `model.item` (Subpackage) |
-| Switchable-State-Typ | `boolean` (kein Enum) |
-| Switchable-Felder | nur `state` (Builder mappt YAML `initialState`); kein separates `initialState`-Feld am Domain-Objekt |
-| use-Targets | argless `use X`, kein `use X on Y` |
-| Item kennt Standort | nein, „dumme" Items |
-| Hidden Items | nein |
-| State→Raum-Beschreibung | nein im MVP |
-| Room.description | `final`, immutable |
-| Room.describe() | nicht auf Room, im LookCommand |
-| Room.equals/hashCode | nicht überschreiben, Identity |
-| Room-NPCs-Feld | von Anfang an drin |
-| Bidirektionale Exits | manuell, kein Auto-Spiegeln |
-| GameContext-Inhalt | minimal: World + Player + GameIO |
-| IDs | lowercase snake_case slugs, kein UUID |
-| ID-Regex | `^[a-z][a-z0-9_]*$` |
-| YAML-Aufteilung | `game.yaml`, `items.yaml`, `rooms.yaml`, `npcs.yaml` |
-| DTO ↔ Domain | getrennt, Resolver-Phase löst String-IDs zu Referenzen auf |
-| Item-Type-Discriminator | YAML-Feld `type: plain|readable|switchable`, in `ItemFactory` als switch |
-| Codebase-Sprache | Englisch (Identifier, YAML, User-Strings) |
-| Doku-Sprache | Deutsch (Prose), Englisch (Code-Beispiele) |
-| Diagramme | Mermaid |
-| Lombok-Inheritance | `@SuperBuilder` |
-| `@Data` | vermeiden, einzelne Annotations bevorzugen |
-| Quit-Wiring | `QuitCommand.bind(Game)` nach Registry-Aufbau |
-| Help-Quelle | `HelpCommand` zieht aus `CommandRegistry.distinctCommands()` |
-| GameIO-Methodennamen | `readLine()` / `write(String)` (Java-üblich, konsistent) |
-| Lombok-Version | 1.18.42 (1.18.36 ist nicht Java-26-kompatibel) |
-
-## Offen / nicht im MVP
-
-- **Win-Condition**: Spiel endet nur per `quit`. Optionale Erweiterung: Bedingung in `game.yaml` (`winRoom`, `requiredItem`).
-- **Bedingte NPC-Reaktionen**, NPC-Memory, Quests — bewusst ausgelassen (siehe `npcs.md`).
-- **Item-Aliases** (z.B. `lamp` ↔ `oil_lamp`) — YAGNI bis konkreter Bedarf.
-- **Eingabehistorie** in der GUI — `ArrayDeque` ist vorgesehen, nicht umgesetzt.

Semesterprojekt/docs/music.md

@@ -0,0 +1,32 @@
+# Background music (GUI)
+
+Background music plays only in the Swing GUI. It is **data-driven and bundled**:
+
+- Tracks live as `.ogg` (OGG Vorbis) files in `src/main/resources/music/`, so they
+  are on the classpath and ship inside the JAR — the game plays music out of the box,
+  with no external folder to set up.
+- 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 tracks 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;
+`OggMusicBackend` streams each track from the classpath (`/music/<track>`) on a
+daemon thread.
+
+## Adding or replacing a track
+
+1. Convert your source audio to OGG Vorbis. With ffmpeg:
+   `ffmpeg -i in.mp3 -c:a libvorbis -q:a 5 out.ogg`
+   or with gstreamer (no ffmpeg needed):
+   `gst-launch-1.0 filesrc location=in.mp3 ! decodebin ! audioconvert ! audioresample ! vorbisenc quality=0.5 ! oggmux ! filesink location=out.ogg`
+2. Drop the `.ogg` into `src/main/resources/music/`.
+3. Reference it from a room's `music:` field in `rooms.yaml`.
+
+The four tracks shipped today: `manor-theme.ogg` (ground floor),
+`cellar-drone.ogg` (cellar), `musicbox.ogg` (upper floor), `lament.ogg` (chapel).

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

@@ -1,458 +0,0 @@
-# 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

@@ -1,485 +0,0 @@
-# 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/specs/2026-05-31-endings-design.md

@@ -1,116 +0,0 @@
-# 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

@@ -1,87 +0,0 @@
-# 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

@@ -1,151 +0,0 @@
-# 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

@@ -1,222 +0,0 @@
-# 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

@@ -1,185 +0,0 @@
-# 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

@@ -1,163 +0,0 @@
-# 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

@@ -1,281 +0,0 @@
-# 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/mvnw

@@ -0,0 +1,295 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.3.4
+#
+# Optional ENV vars
+# -----------------
+#   JAVA_HOME - location of a JDK home dir, required when download maven via java source
+#   MVNW_REPOURL - repo url base for downloading maven distribution
+#   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+#   MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output
+# ----------------------------------------------------------------------------
+
+set -euf
+[ "${MVNW_VERBOSE-}" != debug ] || set -x
+
+# OS specific support.
+native_path() { printf %s\\n "$1"; }
+case "$(uname)" in
+CYGWIN* | MINGW*)
+  [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")"
+  native_path() { cygpath --path --windows "$1"; }
+  ;;
+esac
+
+# set JAVACMD and JAVACCMD
+set_java_home() {
+  # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
+  if [ -n "${JAVA_HOME-}" ]; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+      JAVACCMD="$JAVA_HOME/jre/sh/javac"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+      JAVACCMD="$JAVA_HOME/bin/javac"
+
+      if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
+        echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
+        echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
+        return 1
+      fi
+    fi
+  else
+    JAVACMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v java
+    )" || :
+    JAVACCMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v javac
+    )" || :
+
+    if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then
+      echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2
+      return 1
+    fi
+  fi
+}
+
+# hash string like Java String::hashCode
+hash_string() {
+  str="${1:-}" h=0
+  while [ -n "$str" ]; do
+    char="${str%"${str#?}"}"
+    h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
+    str="${str#?}"
+  done
+  printf %x\\n $h
+}
+
+verbose() { :; }
+[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }
+
+die() {
+  printf %s\\n "$1" >&2
+  exit 1
+}
+
+trim() {
+  # MWRAPPER-139:
+  #   Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
+  #   Needed for removing poorly interpreted newline sequences when running in more
+  #   exotic environments such as mingw bash on Windows.
+  printf "%s" "${1}" | tr -d '[:space:]'
+}
+
+scriptDir="$(dirname "$0")"
+scriptName="$(basename "$0")"
+
+# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
+while IFS="=" read -r key value; do
+  case "${key-}" in
+  distributionUrl) distributionUrl=$(trim "${value-}") ;;
+  distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
+  esac
+done <"$scriptDir/.mvn/wrapper/maven-wrapper.properties"
+[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+
+case "${distributionUrl##*/}" in
+maven-mvnd-*bin.*)
+  MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/
+  case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in
+  *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;;
+  :Darwin*x86_64) distributionPlatform=darwin-amd64 ;;
+  :Darwin*arm64) distributionPlatform=darwin-aarch64 ;;
+  :Linux*x86_64*) distributionPlatform=linux-amd64 ;;
+  *)
+    echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2
+    distributionPlatform=linux-amd64
+    ;;
+  esac
+  distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
+  ;;
+maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
+*) MVN_CMD="mvn${scriptName#mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
+esac
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}"
+distributionUrlName="${distributionUrl##*/}"
+distributionUrlNameMain="${distributionUrlName%.*}"
+distributionUrlNameMain="${distributionUrlNameMain%-bin}"
+MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}"
+MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")"
+
+exec_maven() {
+  unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || :
+  exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD"
+}
+
+if [ -d "$MAVEN_HOME" ]; then
+  verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  exec_maven "$@"
+fi
+
+case "${distributionUrl-}" in
+*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;;
+*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;;
+esac
+
+# prepare tmp dir
+if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then
+  clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; }
+  trap clean HUP INT TERM EXIT
+else
+  die "cannot create temp dir"
+fi
+
+mkdir -p -- "${MAVEN_HOME%/*}"
+
+# Download and Install Apache Maven
+verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+verbose "Downloading from: $distributionUrl"
+verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+# select .zip or .tar.gz
+if ! command -v unzip >/dev/null; then
+  distributionUrl="${distributionUrl%.zip}.tar.gz"
+  distributionUrlName="${distributionUrl##*/}"
+fi
+
+# verbose opt
+__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR=''
+[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v
+
+# normalize http auth
+case "${MVNW_PASSWORD:+has-password}" in
+'') MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+esac
+
+if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then
+  verbose "Found wget ... using wget"
+  wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl"
+elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then
+  verbose "Found curl ... using curl"
+  curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl"
+elif set_java_home; then
+  verbose "Falling back to use Java to download"
+  javaSource="$TMP_DOWNLOAD_DIR/Downloader.java"
+  targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName"
+  cat >"$javaSource" <<-END
+	public class Downloader extends java.net.Authenticator
+	{
+	  protected java.net.PasswordAuthentication getPasswordAuthentication()
+	  {
+	    return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
+	  }
+	  public static void main( String[] args ) throws Exception
+	  {
+	    setDefault( new Downloader() );
+	    java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() );
+	  }
+	}
+	END
+  # For Cygwin/MinGW, switch paths to Windows format before running javac and java
+  verbose " - Compiling Downloader.java ..."
+  "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java"
+  verbose " - Running Downloader.java ..."
+  "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")"
+fi
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+if [ -n "${distributionSha256Sum-}" ]; then
+  distributionSha256Result=false
+  if [ "$MVN_CMD" = mvnd.sh ]; then
+    echo "Checksum validation is not supported for maven-mvnd." >&2
+    echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  elif command -v sha256sum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  elif command -v shasum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2
+    echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  fi
+  if [ $distributionSha256Result = false ]; then
+    echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2
+    echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2
+    exit 1
+  fi
+fi
+
+# unzip and move
+if command -v unzip >/dev/null; then
+  unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip"
+else
+  tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
+fi
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+actualDistributionDir=""
+
+# First try the expected directory name (for regular distributions)
+if [ -d "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" ]; then
+  if [ -f "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/bin/$MVN_CMD" ]; then
+    actualDistributionDir="$distributionUrlNameMain"
+  fi
+fi
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if [ -z "$actualDistributionDir" ]; then
+  # enable globbing to iterate over items
+  set +f
+  for dir in "$TMP_DOWNLOAD_DIR"/*; do
+    if [ -d "$dir" ]; then
+      if [ -f "$dir/bin/$MVN_CMD" ]; then
+        actualDistributionDir="$(basename "$dir")"
+        break
+      fi
+    fi
+  done
+  set -f
+fi
+
+if [ -z "$actualDistributionDir" ]; then
+  verbose "Contents of $TMP_DOWNLOAD_DIR:"
+  verbose "$(ls -la "$TMP_DOWNLOAD_DIR")"
+  die "Could not find Maven distribution directory in extracted archive"
+fi
+
+verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$actualDistributionDir/mvnw.url"
+mv -- "$TMP_DOWNLOAD_DIR/$actualDistributionDir" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
+
+clean || :
+exec_maven "$@"

Semesterprojekt/mvnw.cmd

@@ -0,0 +1,189 @@
+<# : batch portion
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.3.4
+@REM
+@REM Optional ENV vars
+@REM   MVNW_REPOURL - repo url base for downloading maven distribution
+@REM   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+@REM   MVNW_VERBOSE - true: enable verbose log; others: silence the output
+@REM ----------------------------------------------------------------------------
+
+@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0)
+@SET __MVNW_CMD__=
+@SET __MVNW_ERROR__=
+@SET __MVNW_PSMODULEP_SAVE=%PSModulePath%
+@SET PSModulePath=
+@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @(
+  IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B)
+)
+@SET PSModulePath=%__MVNW_PSMODULEP_SAVE%
+@SET __MVNW_PSMODULEP_SAVE=
+@SET __MVNW_ARG0_NAME__=
+@SET MVNW_USERNAME=
+@SET MVNW_PASSWORD=
+@IF NOT "%__MVNW_CMD__%"=="" ("%__MVNW_CMD__%" %*)
+@echo Cannot start maven from wrapper >&2 && exit /b 1
+@GOTO :EOF
+: end batch / begin powershell #>
+
+$ErrorActionPreference = "Stop"
+if ($env:MVNW_VERBOSE -eq "true") {
+  $VerbosePreference = "Continue"
+}
+
+# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties
+$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl
+if (!$distributionUrl) {
+  Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+}
+
+switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
+  "maven-mvnd-*" {
+    $USE_MVND = $true
+    $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip"
+    $MVN_CMD = "mvnd.cmd"
+    break
+  }
+  default {
+    $USE_MVND = $false
+    $MVN_CMD = $script -replace '^mvnw','mvn'
+    break
+  }
+}
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+if ($env:MVNW_REPOURL) {
+  $MVNW_REPO_PATTERN = if ($USE_MVND -eq $False) { "/org/apache/maven/" } else { "/maven/mvnd/" }
+  $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace "^.*$MVNW_REPO_PATTERN",'')"
+}
+$distributionUrlName = $distributionUrl -replace '^.*/',''
+$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
+
+$MAVEN_M2_PATH = "$HOME/.m2"
+if ($env:MAVEN_USER_HOME) {
+  $MAVEN_M2_PATH = "$env:MAVEN_USER_HOME"
+}
+
+if (-not (Test-Path -Path $MAVEN_M2_PATH)) {
+    New-Item -Path $MAVEN_M2_PATH -ItemType Directory | Out-Null
+}
+
+$MAVEN_WRAPPER_DISTS = $null
+if ((Get-Item $MAVEN_M2_PATH).Target[0] -eq $null) {
+  $MAVEN_WRAPPER_DISTS = "$MAVEN_M2_PATH/wrapper/dists"
+} else {
+  $MAVEN_WRAPPER_DISTS = (Get-Item $MAVEN_M2_PATH).Target[0] + "/wrapper/dists"
+}
+
+$MAVEN_HOME_PARENT = "$MAVEN_WRAPPER_DISTS/$distributionUrlNameMain"
+$MAVEN_HOME_NAME = ([System.Security.Cryptography.SHA256]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
+$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
+
+if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
+  Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
+  exit $?
+}
+
+if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) {
+  Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl"
+}
+
+# prepare tmp dir
+$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile
+$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir"
+$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null
+trap {
+  if ($TMP_DOWNLOAD_DIR.Exists) {
+    try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+    catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+  }
+}
+
+New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null
+
+# Download and Install Apache Maven
+Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+Write-Verbose "Downloading from: $distributionUrl"
+Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+$webclient = New-Object System.Net.WebClient
+if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) {
+  $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD)
+}
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum
+if ($distributionSha256Sum) {
+  if ($USE_MVND) {
+    Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties."
+  }
+  Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
+  if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) {
+    Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property."
+  }
+}
+
+# unzip and move
+Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+$actualDistributionDir = ""
+
+# First try the expected directory name (for regular distributions)
+$expectedPath = Join-Path "$TMP_DOWNLOAD_DIR" "$distributionUrlNameMain"
+$expectedMvnPath = Join-Path "$expectedPath" "bin/$MVN_CMD"
+if ((Test-Path -Path $expectedPath -PathType Container) -and (Test-Path -Path $expectedMvnPath -PathType Leaf)) {
+  $actualDistributionDir = $distributionUrlNameMain
+}
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if (!$actualDistributionDir) {
+  Get-ChildItem -Path "$TMP_DOWNLOAD_DIR" -Directory | ForEach-Object {
+    $testPath = Join-Path $_.FullName "bin/$MVN_CMD"
+    if (Test-Path -Path $testPath -PathType Leaf) {
+      $actualDistributionDir = $_.Name
+    }
+  }
+}
+
+if (!$actualDistributionDir) {
+  Write-Error "Could not find Maven distribution directory in extracted archive"
+}
+
+Write-Verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+Rename-Item -Path "$TMP_DOWNLOAD_DIR/$actualDistributionDir" -NewName $MAVEN_HOME_NAME | Out-Null
+try {
+  Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
+} catch {
+  if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) {
+    Write-Error "fail to move MAVEN_HOME"
+  }
+} finally {
+  try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+  catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+}
+
+Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"

Semesterprojekt/pom.xml

@@ -9,8 +9,10 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <maven.compiler.source>25</maven.compiler.source>
+        <!-- Java 21 (LTS): the newest feature actually used is List.getFirst()
-        <maven.compiler.target>25</maven.compiler.target>
+             (SequencedCollection, Java 21). Building against an LTS keeps the
+             project compilable on any current JDK. -->
+        <maven.compiler.release>21</maven.compiler.release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <jackson.version>2.18.2</jackson.version>
@@ -49,6 +51,18 @@
             <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>
@@ -97,6 +111,76 @@
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>3.5.2</version>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.6.0</version>
+                <!-- Two self-contained jars in release/: one per entry point.
+                     createDependencyReducedPom is off globally so no stray pom is written. -->
+                <configuration>
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                </configuration>
+                <executions>
+                    <!-- Console version -> release/HauntedManor-Console.jar -->
+                    <execution>
+                        <id>shade-console</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <outputFile>${project.basedir}/release/HauntedManor-Console.jar</outputFile>
+                            <!-- Console has no audio (GameIO.setMusic is a no-op there), so leave
+                                 out the OGG decode libraries and the ~11 MB of music tracks. -->
+                            <artifactSet>
+                                <excludes>
+                                    <exclude>com.googlecode.soundlibs:vorbisspi</exclude>
+                                    <exclude>com.googlecode.soundlibs:jorbis</exclude>
+                                </excludes>
+                            </artifactSet>
+                            <filters>
+                                <filter>
+                                    <artifact>thb.jeanluc:Semesterprojekt</artifact>
+                                    <excludes>
+                                        <exclude>music/**</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                            <transformers>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <manifestEntries>
+                                        <Main-Class>thb.jeanluc.adventure.App</Main-Class>
+                                    </manifestEntries>
+                                </transformer>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                    <!-- Swing GUI version -> release/HauntedManor-GUI.jar -->
+                    <execution>
+                        <id>shade-gui</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <outputFile>${project.basedir}/release/HauntedManor-GUI.jar</outputFile>
+                            <transformers>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <manifestEntries>
+                                        <Main-Class>thb.jeanluc.adventure.AppGui</Main-Class>
+                                    </manifestEntries>
+                                </transformer>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>

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

@@ -21,12 +21,15 @@ 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;
@@ -44,10 +47,15 @@ import java.util.List;
 @Slf4j
 public final class App {
 
+    /** Utility class; not instantiable. */
     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 {
@@ -59,33 +67,46 @@ public final class App {
         }
     }
 
-    /** Runs the menu shell on the given IO until the player quits. */
+    /**
+     * Runs the menu shell on the given IO until the player quits.
+     *
+     * @param io frontend the menu and the game are rendered on
+     */
     public static void run(GameIO io) {
-        SaveService saves = new SaveService();
+        run(io, new SaveService(), new SettingsStore());
-        SettingsStore settingsStore = new SettingsStore();
+    }
+
+    /**
+     * Runs the menu shell with injectable persistence (for testing).
+     *
+     * @param io            frontend the menu and the game are rendered on
+     * @param saves         save-slot backend
+     * @param settingsStore settings backend
+     */
+    static void run(GameIO io, SaveService saves, SettingsStore settingsStore) {
         Settings settings = settingsStore.load();
-        ConsoleIO consoleIo = io instanceof ConsoleIO c ? c : null;
+        SettingsMenu.apply(settings, io);
-        SettingsMenu.apply(settings, consoleIo);
 
         boolean running = true;
         while (running) {
             switch (MainMenu.show(io)) {
-                case NEW_GAME -> play(io, saves, newSession(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()));
+                            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, consoleIo);
+                case SETTINGS -> settings = SettingsMenu.show(io, settings, settingsStore);
                 case QUIT -> running = false;
             }
         }
         io.write("Farewell.");
+        io.shutdown(); // GUI: close the window and exit; console: no-op
     }
 
     /** Loads a fresh world and binds it to a newly named session. */
@@ -96,7 +117,7 @@ public final class App {
     }
 
     /** Builds the registry, runs one game to completion, autosaving to its slot. */
-    private static void play(GameIO io, SaveService saves, GameSession session) {
+    private static void play(GameIO io, SaveService saves, GameSession session, boolean withTutorial) {
         GameContext ctx = new GameContext(session, io);
         ctx.setSaveCallback(() -> {
             try {
@@ -106,32 +127,42 @@ public final class App {
             }
         });
 
+        // German aliases mirror the examples in the assignment ("Gehe nach
+        // Norden", "Nimm Brief", "Lies Brief", "Benutze Schaufel").
         CommandRegistry registry = new CommandRegistry();
-        registry.register(new GoCommand(), "go", "move", "walk");
+        registry.register(new GoCommand(), "go", "move", "walk", "gehe", "geh");
-        registry.register(new LookCommand(), "look", "l");
+        registry.register(new LookCommand(), "look", "l", "umsehen", "schau");
-        registry.register(new InventoryCommand(), "inventory", "inv", "i");
+        registry.register(new InventoryCommand(), "inventory", "inv", "i", "inventar");
-        registry.register(new TakeCommand(), "take", "pick", "get");
+        registry.register(new TakeCommand(), "take", "pick", "get", "nimm", "nehme");
-        registry.register(new DropCommand(), "drop", "put");
+        registry.register(new DropCommand(), "drop", "put", "lege", "ablegen");
-        registry.register(new UseCommand(), "use");
+        registry.register(new UseCommand(), "use", "benutze", "benutz");
-        registry.register(new ReadCommand(), "read");
+        registry.register(new ReadCommand(), "read", "lies", "lese");
-        registry.register(new ExamineCommand(), "examine", "x", "inspect");
+        registry.register(new ExamineCommand(), "examine", "x", "inspect", "untersuche");
-        registry.register(new MapCommand(), "map", "m");
+        registry.register(new MapCommand(), "map", "m", "karte");
-        registry.register(new QuestsCommand(), "quests", "log", "journal");
+        registry.register(new QuestsCommand(), "quests", "log", "journal", "aufgaben");
-        registry.register(new TalkCommand(), "talk", "speak");
+        registry.register(new TalkCommand(), "talk", "speak", "rede", "sprich");
-        registry.register(new GiveCommand(), "give");
+        registry.register(new GiveCommand(), "give", "gib");
-        registry.register(new SaveCommand(saves), "save");
+        registry.register(new SaveCommand(saves), "save", "speichern");
 
         Game game = new Game(ctx, registry, new CommandParser());
 
         MenuCommand menu = new MenuCommand(saves);
         menu.bind(game);
-        registry.register(menu, "menu", "quit", "exit");
+        registry.register(menu, "menu", "quit", "exit", "beenden");
-        registry.register(new HelpCommand(registry), "help", "?");
+        registry.register(new HelpCommand(registry), "help", "?", "hilfe");
+
+        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/AppGui.java

@@ -14,6 +14,7 @@ import javax.swing.SwingUtilities;
 @Slf4j
 public final class AppGui {
 
+    /** Utility class; not instantiable. */
     private AppGui() {
     }
 
@@ -29,8 +30,13 @@ public final class AppGui {
                 try {
                     App.run(io);
                 } catch (RuntimeException e) {
+                    // The worker is the only consumer of the input queue, so once
+                    // it dies nothing can service the window again. Tell the player
+                    // what happened and close down rather than leaving a live-looking
+                    // window that silently ignores every command.
                     log.error("Fatal error during game startup", e);
-                    io.write("Fatal error: " + e.getMessage());
+                    io.fatal("Fatal error: " + e.getMessage()
+                            + "\n\nThe game cannot continue and will close.");
                 }
             }, "game-loop");
             worker.setDaemon(true);

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/CommandParser.java

@@ -16,7 +16,8 @@ public class CommandParser {
      * small — when adding more, watch out for words that might be valid
      * item ids ({@code key}, {@code lamp}, etc.).
      */
-    private static final Set<String> FILLERS = Set.of("to", "with", "at", "the", "a", "an", "on");
+    private static final Set<String> FILLERS =
+            Set.of("to", "with", "at", "the", "a", "an", "on", "nach", "den", "die", "das");
 
     /**
      * Parses an input line into a verb and its arguments.

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

@@ -4,6 +4,7 @@ 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.game.Light;
 import thb.jeanluc.adventure.model.Npc;
 import thb.jeanluc.adventure.model.NpcReaction;
 import thb.jeanluc.adventure.model.item.Item;
@@ -24,6 +25,10 @@ public class GiveCommand implements Command {
             ctx.getIo().write("Usage: give <item> <npc>.");
             return;
         }
+        if (!Light.canSeeRoom(ctx)) {
+            ctx.getIo().write("It's too dark to make out anyone here.");
+            return;
+        }
         String itemId = args.get(0);
         String npcId = args.get(1);
 

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

@@ -3,39 +3,49 @@ 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.MapLayout;
 import thb.jeanluc.adventure.game.Light;
+import thb.jeanluc.adventure.game.Pathfinder;
 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 = ctx.getPlayer().getCurrentRoom().getExitLocks().get(dir);
+        ExitLock lock = here.getExitLocks().get(dir);
         if (lock != null && !Conditions.all(lock.requires(), ctx)) {
             ctx.getIo().write(lock.blocked());
             return;
@@ -49,8 +59,70 @@ public class GoCommand implements Command {
         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

@@ -2,6 +2,7 @@ package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
 import thb.jeanluc.adventure.game.Conditions;
+import thb.jeanluc.adventure.game.EscortEngine;
 import thb.jeanluc.adventure.game.GameContext;
 import thb.jeanluc.adventure.game.Light;
 import thb.jeanluc.adventure.io.text.RoomView;
@@ -36,6 +37,10 @@ public class LookCommand implements Command {
                 break;
             }
         }
+        String followers = EscortEngine.followerNote(ctx);
+        if (followers != null) {
+            description = description.stripTrailing() + "\n\n" + followers;
+        }
         ctx.getIo().showRoom(new RoomView(room.getName(), description, items, npcs, exits));
     }
 

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

@@ -2,8 +2,8 @@ package thb.jeanluc.adventure.command.impl;
 
 import thb.jeanluc.adventure.command.Command;
 import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.MapLayout;
 import thb.jeanluc.adventure.io.text.MapView;
-import thb.jeanluc.adventure.map.MapLayout;
 
 import java.util.List;
 

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

@@ -16,10 +16,17 @@ import java.util.List;
 @RequiredArgsConstructor
 public class MenuCommand implements Command {
 
+    /** Persistence backend the active slot is written to before leaving. */
     private final SaveService saves;
+
+    /** Running game whose loop is stopped; null until {@link #bind(Game)} is called. */
     private Game game;
 
-    /** Binds the running game (two-phase wiring, as the registry is built first). */
+    /**
+     * Binds the running game (two-phase wiring, as the registry is built first).
+     *
+     * @param game the game loop to stop when this command runs
+     */
     public void bind(Game game) {
         this.game = game;
     }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/command/impl/ReadCommand.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.item.Item;
 import thb.jeanluc.adventure.model.item.ReadableItem;
 
@@ -21,6 +22,11 @@ public class ReadCommand implements Command {
             ctx.getIo().write("Read what?");
             return;
         }
+        // Reading needs light even for a carried item.
+        if (!Light.canSeeRoom(ctx)) {
+            ctx.getIo().write("It's too dark to read.");
+            return;
+        }
         String itemId = args.getFirst();
         Optional<Item> item = ctx.getPlayer().findItem(itemId);
         if (item.isEmpty()) {

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

@@ -12,6 +12,7 @@ import java.util.List;
 @RequiredArgsConstructor
 public class SaveCommand implements Command {
 
+    /** Persistence backend the active slot is written to. */
     private final SaveService saves;
 
     @Override

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

@@ -27,13 +27,19 @@ public class TakeCommand implements Command {
         }
         String itemId = args.getFirst();
         Room room = ctx.getPlayer().getCurrentRoom();
-        Optional<Item> taken = room.removeItem(itemId);
+        Optional<Item> found = room.findItem(itemId);
-        if (taken.isEmpty()) {
+        if (found.isEmpty()) {
             ctx.getIo().write("There is no '" + itemId + "' here.");
             return;
         }
-        ctx.getPlayer().addItem(taken.get());
+        Item item = found.get();
-        ctx.getIo().write("You take the " + taken.get().getName() + ".");
+        if (item.isFixed()) {
+            ctx.getIo().write("The " + item.getName() + " is part of the room — you can't take it.");
+            return;
+        }
+        room.removeItem(itemId);
+        ctx.getPlayer().addItem(item);
+        ctx.getIo().write("You take the " + item.getName() + ".");
     }
 
     @Override

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

@@ -3,6 +3,7 @@ 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.model.DialogueLine;
 import thb.jeanluc.adventure.model.Npc;
 
@@ -20,6 +21,10 @@ public class TalkCommand implements Command {
             ctx.getIo().write("Talk to whom?");
             return;
         }
+        if (!Light.canSeeRoom(ctx)) {
+            ctx.getIo().write("It's too dark to make out anyone here.");
+            return;
+        }
         String npcId = args.getFirst();
         Optional<Npc> npc = ctx.getPlayer().getCurrentRoom().findNpc(npcId);
         if (npc.isEmpty()) {

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

@@ -1,16 +1,19 @@
 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.game.Light;
 import thb.jeanluc.adventure.model.item.Item;
 
 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 {
 
@@ -20,13 +23,21 @@ 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();
+        // Inventory stays reachable in the dark (so a lamp can be relit);
+        // room items may only be resolved when the room is lit.
         Optional<Item> item = ctx.getPlayer().findItem(itemId);
-        if (item.isEmpty()) {
+        if (item.isEmpty() && Light.canSeeRoom(ctx)) {
             item = ctx.getPlayer().getCurrentRoom().findItem(itemId);
         }
         if (item.isEmpty()) {
-            ctx.getIo().write("There is no '" + itemId + "' here or in your inventory.");
+            ctx.getIo().write(Light.canSeeRoom(ctx)
+                    ? "There is no '" + itemId + "' here or in your inventory."
+                    : "It's too dark to see that.");
             return;
         }
         item.get().use(ctx);
@@ -34,6 +45,6 @@ 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 +1,88 @@
+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.
+     *
+     * @param ctx the active game context
+     * @param idX id of the first operand item
+     * @param idY id of the second operand item
+     */
+    public static void tryUse(GameContext ctx, String idX, String idY) {
+        if (!present(ctx, idX)) {
+            ctx.getIo().write(unresolved(ctx, idX));
+            return;
+        }
+        if (!present(ctx, idY)) {
+            ctx.getIo().write(unresolved(ctx, 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());
+        }
+    }
+
+    /**
+     * An operand resolves from the inventory always, but from the room only
+     * while the room is lit — otherwise combining with room scenery would
+     * work in pitch darkness.
+     */
+    private static boolean present(GameContext ctx, String id) {
+        return ctx.getPlayer().hasItem(id)
+                || (Light.canSeeRoom(ctx)
+                        && ctx.getPlayer().getCurrentRoom().findItem(id).isPresent());
+    }
+
+    /** Consumes an operand from the inventory, falling back to the current room. */
+    private static void removeFromAnywhere(GameContext ctx, String id) {
+        if (ctx.getPlayer().removeItem(id).isEmpty()) {
+            ctx.getPlayer().getCurrentRoom().removeItem(id);
+        }
+    }
+
+    /**
+     * Message for an operand that could not be resolved. In a dark room the
+     * reason is always darkness, and the wording must not reveal whether the
+     * item is actually there.
+     */
+    private static String unresolved(GameContext ctx, String id) {
+        if (!Light.canSeeRoom(ctx)) {
+            return "It's too dark to see that.";
+        }
+        return "There is no '" + id + "' here or in your inventory.";
+    }
+}

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

@@ -10,6 +10,13 @@ public final class Conditions {
     private Conditions() {
     }
 
+    /**
+     * Evaluates a single condition.
+     *
+     * @param c   the condition to evaluate
+     * @param ctx the active game context
+     * @return true if the condition holds
+     */
     public static boolean holds(Condition c, GameContext ctx) {
         return switch (c.type()) {
             case FLAG -> ctx.getState().isSet(c.arg());
@@ -18,7 +25,13 @@ public final class Conditions {
         };
     }
 
-    /** True iff every condition holds. A null or empty list is vacuously true. */
+    /**
+     * True iff every condition holds. A null or empty list is vacuously true.
+     *
+     * @param conditions the conditions to evaluate; may be null
+     * @param ctx        the active game context
+     * @return true if all conditions hold
+     */
     public static boolean all(List<Condition> conditions, GameContext ctx) {
         if (conditions == null) {
             return true;

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

@@ -13,6 +13,13 @@ public final class Effects {
     private Effects() {
     }
 
+    /**
+     * Applies a single effect. An effect referencing an unknown item is logged
+     * and skipped rather than failing the turn.
+     *
+     * @param e   the effect to apply
+     * @param ctx the active game context
+     */
     public static void apply(Effect e, GameContext ctx) {
         switch (e.type()) {
             case SET_FLAG -> ctx.getState().set(e.arg());
@@ -31,7 +38,12 @@ public final class Effects {
         }
     }
 
-    /** Applies each effect in order. A null list is a no-op. */
+    /**
+     * Applies each effect in order. A null list is a no-op.
+     *
+     * @param effects the effects to apply; may be null
+     * @param ctx     the active game context
+     */
     public static void applyAll(List<Effect> effects, GameContext ctx) {
         if (effects == null) {
             return;

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

@@ -9,7 +9,12 @@ public final class EndingEngine {
     private EndingEngine() {
     }
 
-    /** First ending whose conditions hold, in list order; null if none. */
+    /**
+     * First ending whose conditions hold, in list order; null if none.
+     *
+     * @param ctx the active game context
+     * @return the triggered ending, or null if no ending's conditions hold
+     */
     public static Ending triggered(GameContext ctx) {
         for (Ending e : ctx.getWorld().getEndings()) {
             if (Conditions.all(e.when(), ctx)) {
@@ -19,7 +24,14 @@ public final class EndingEngine {
         return null;
     }
 
-    /** Builds the ending screen: title banner, text, and a run summary. */
+    /**
+     * Builds the ending screen: title banner, text, and a run summary.
+     *
+     * @param e     the triggered ending
+     * @param ctx   the active game context
+     * @param turns number of turns the run took
+     * @return the rendered end-of-game screen
+     */
     public static StyledText render(Ending e, GameContext ctx, int turns) {
         int total = ctx.getWorld().getQuests().size();
         int done = ctx.getQuestLog().completed().size();
@@ -34,6 +46,7 @@ public final class EndingEngine {
         return b.build();
     }
 
+    /** Rank line for the summary: derived from the ending's outcome and quest completeness. */
     private static String rank(Ending e, int total, int done) {
         if (e.victory() && total > 0 && done == total) {
             return "Master of the Manor";

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

@@ -0,0 +1,138 @@
+package thb.jeanluc.adventure.game;
+
+import thb.jeanluc.adventure.io.text.StyledText;
+import thb.jeanluc.adventure.model.Npc;
+import thb.jeanluc.adventure.model.Room;
+import thb.jeanluc.adventure.model.item.Item;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Drives the optional "Lost Twins" escort side-quest. Once a twin is recruited
+ * (a {@code give} reaction sets its {@code *_following} flag) the twin tags
+ * along with the player: this engine removes them from their home room and
+ * renders them as a follower. When the player reaches the foyer with both
+ * twins in tow, the brothers are reunited — granting the reward and firing the
+ * {@code twins_reunited} flag that unlocks the bonus ending.
+ *
+ * <p>State lives entirely in flags, so a save/load round-trip needs no extra
+ * persistence: {@link #tick} reconciles follower placement from the restored
+ * flags on the first turn after loading.
+ */
+public final class EscortEngine {
+
+    /** Room the twins must be led to in order to reunite and escape. */
+    static final String REUNION_ROOM_ID = "foyer";
+
+    /** Flag set (and bonus-ending gate) once the brothers are reunited. */
+    static final String REUNITED_FLAG = "twins_reunited";
+
+    /** Item handed to the player as thanks; pure flavour, no mechanical effect. */
+    static final String REWARD_ITEM_ID = "brass_compass";
+
+    /** The two escortable twins, each pinned to a home room and a follow flag. */
+    private static final List<Twin> TWINS = List.of(
+            new Twin("marlon", "marlon_following", "conservatory"),
+            new Twin("malte", "malte_following", "boiler_room"));
+
+    private EscortEngine() {
+    }
+
+    /**
+     * A recruitable twin and the state that tracks their escort.
+     *
+     * @param npcId         id of the twin's NPC in the world
+     * @param followingFlag flag that is set while this twin follows the player
+     * @param homeRoomId    id of the room the twin waits in until recruited
+     */
+    private record Twin(String npcId, String followingFlag, String homeRoomId) {
+    }
+
+    /**
+     * Per-turn escort progression: pull recruited twins out of their home rooms
+     * and, when both stand with the player in the foyer, reunite them.
+     *
+     * @param ctx the active game context
+     */
+    public static void tick(GameContext ctx) {
+        for (Twin twin : TWINS) {
+            if (isFollowing(ctx, twin)) {
+                Room home = ctx.getWorld().getRooms().get(twin.homeRoomId());
+                if (home != null) {
+                    home.removeNpc(twin.npcId());
+                }
+            }
+        }
+        maybeReunite(ctx);
+    }
+
+    /**
+     * A short line naming the twins currently at the player's heels, or
+     * {@code null} when nobody is following. Appended to room descriptions.
+     *
+     * @param ctx the active game context
+     * @return the follower note, or {@code null}
+     */
+    public static String followerNote(GameContext ctx) {
+        if (ctx.getState().isSet(REUNITED_FLAG)) {
+            return null;
+        }
+        List<String> names = new ArrayList<>();
+        for (Twin twin : TWINS) {
+            if (isFollowing(ctx, twin)) {
+                names.add(displayName(ctx, twin));
+            }
+        }
+        if (names.isEmpty()) {
+            return null;
+        }
+        if (names.size() == 1) {
+            return names.getFirst() + " keeps close at your shoulder.";
+        }
+        return String.join(" and ", names) + " keep close at your shoulders.";
+    }
+
+    /**
+     * Reunites the brothers once both follow the player into the reunion room:
+     * sets {@link #REUNITED_FLAG}, grants the reward, and prints the scene. Runs
+     * at most once per playthrough.
+     */
+    private static void maybeReunite(GameContext ctx) {
+        if (ctx.getState().isSet(REUNITED_FLAG)) {
+            return;
+        }
+        boolean inFoyer = REUNION_ROOM_ID.equals(ctx.getPlayer().getCurrentRoom().getId());
+        boolean bothFollowing = TWINS.stream().allMatch(t -> isFollowing(ctx, t));
+        if (!inFoyer || !bothFollowing) {
+            return;
+        }
+
+        ctx.getState().set(REUNITED_FLAG);
+        grantReward(ctx);
+        ctx.getIo().print(StyledText.builder()
+                .heading("Marlon and Malte are reunited! ")
+                .plain("The brothers crash together in the lamplight, clinging on as if "
+                        + "the dark might split them again. Then they're gone — out the "
+                        + "front door and into the night, hand in hand, free.")
+                .build());
+    }
+
+    /** Adds the reward item to the inventory unless the player already carries it. */
+    private static void grantReward(GameContext ctx) {
+        Item reward = ctx.getWorld().getItems().get(REWARD_ITEM_ID);
+        if (reward != null && !ctx.getPlayer().hasItem(REWARD_ITEM_ID)) {
+            ctx.getPlayer().addItem(reward);
+        }
+    }
+
+    private static boolean isFollowing(GameContext ctx, Twin twin) {
+        return ctx.getState().isSet(twin.followingFlag());
+    }
+
+    /** The twin's NPC name, falling back to their id if the NPC is missing from the world. */
+    private static String displayName(GameContext ctx, Twin twin) {
+        Npc npc = ctx.getWorld().getNpcs().get(twin.npcId());
+        return npc != null ? npc.getName() : twin.npcId();
+    }
+}

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

@@ -7,7 +7,6 @@ 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;
@@ -32,12 +31,27 @@ 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).
+     *
+     * @param tutorialGuide the guide to run alongside the loop
+     */
+    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) {
@@ -47,6 +61,12 @@ 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'.");
@@ -56,6 +76,9 @@ public class Game {
                 if (ctx.getSession().getTurn() % 10 == 0) {
                     ctx.save();
                 }
+                if (tutorialGuide != null && tutorialGuide.isActive()) {
+                    tutorialGuide.onCommand(ctx, parsed);
+                }
             }
             publishHud();
             maybeEnd();
@@ -64,6 +87,11 @@ public class Game {
 
     /** 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()));
@@ -71,7 +99,14 @@ public class Game {
         }
     }
 
+    /**
+     * Ticks the per-turn engines and republishes the whole view state — HUD,
+     * map, quest panel, and room music — to the IO channel.
+     */
     private void publishHud() {
+        // EscortEngine first: it sets flags (e.g. twins_reunited) that
+        // QuestEngine's stage-completion conditions read in the same turn.
+        EscortEngine.tick(ctx);
         QuestEngine.tick(ctx);
         ctx.getIo().setHud(new Hud(
                 ctx.getPlayer().getCurrentRoom().getName(),
@@ -84,6 +119,7 @@ public class Game {
                 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

@@ -11,47 +11,96 @@ import thb.jeanluc.adventure.model.World;
  */
 public class GameContext {
 
+    /** The mutable state of the current playthrough. */
     private final GameSession session;
+
+    /** Channel commands read input from and write output to. */
     private final GameIO io;
 
     /** Silent autosave hook, wired by the app; no-op by default (tests). */
     private Runnable saveCallback = () -> { };
 
+    /**
+     * Creates a context over an existing session.
+     *
+     * @param session the playthrough state
+     * @param io      the IO channel
+     */
     public GameContext(GameSession session, GameIO io) {
         this.session = session;
         this.io = io;
     }
 
-    /** Convenience for tests/legacy callers: wraps a fresh single-use session. */
+    /**
+     * Convenience for tests/legacy callers: wraps a fresh single-use session.
+     *
+     * @param world  the loaded world
+     * @param player the player character
+     * @param io     the IO channel
+     */
     public GameContext(World world, Player player, GameIO io) {
         this(new GameSession(world, player, "session"), io);
     }
 
+    /**
+     * Returns the session this context was built over.
+     *
+     * @return the playthrough state backing this context
+     */
     public GameSession getSession() {
         return session;
     }
 
+    /**
+     * Delegates to the session.
+     *
+     * @return the loaded world
+     */
     public World getWorld() {
         return session.getWorld();
     }
 
+    /**
+     * Delegates to the session.
+     *
+     * @return the player character
+     */
     public Player getPlayer() {
         return session.getPlayer();
     }
 
+    /**
+     * Delegates to the session.
+     *
+     * @return the world flags
+     */
     public GameState getState() {
         return session.getState();
     }
 
+    /**
+     * Delegates to the session.
+     *
+     * @return the quest progress
+     */
     public QuestLog getQuestLog() {
         return session.getQuestLog();
     }
 
+    /**
+     * Returns the channel commands read from and write to.
+     *
+     * @return the IO channel
+     */
     public GameIO getIo() {
         return io;
     }
 
-    /** Sets the silent autosave hook (called by interval/quest autosave). */
+    /**
+     * Sets the silent autosave hook (called by interval/quest autosave).
+     *
+     * @param saveCallback the hook to run on {@link #save()}
+     */
     public void setSaveCallback(Runnable saveCallback) {
         this.saveCallback = saveCallback;
     }

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

@@ -13,23 +13,47 @@ import thb.jeanluc.adventure.model.World;
 @Getter
 public class GameSession {
 
+    /** The loaded world this playthrough runs on. */
     private final World world;
+
+    /** The player character, including inventory, position, and visited rooms. */
     private final Player player;
+
+    /** World flags set and cleared by effects and conditions. */
     private final GameState state = new GameState();
+
+    /** Quest progress: active stages and completed quests. */
     private final QuestLog questLog = new QuestLog();
+
+    /** Name of the save slot this session is bound to; save/load target. */
     private final String slotName;
+
+    /** Number of commands executed so far; shown in the HUD and the ending summary. */
     private int turn;
 
+    /**
+     * Creates a session bound to a save slot.
+     *
+     * @param world    the loaded world
+     * @param player   the player character
+     * @param slotName the save slot this session reads from and writes to
+     */
     public GameSession(World world, Player player, String slotName) {
         this.world = world;
         this.player = player;
         this.slotName = slotName;
     }
 
+    /**
+     * Overwrites the turn counter (used when restoring a save).
+     *
+     * @param turn the turn count to restore
+     */
     public void setTurn(int turn) {
         this.turn = turn;
     }
 
+    /** Advances the turn counter by one. */
     public void incrementTurn() {
         this.turn++;
     }

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

@@ -8,25 +8,51 @@ import java.util.Set;
 /** Named world flags. A flag is "set" (true) when present in the set. */
 public class GameState {
 
+    /** Ids of the currently set flags. Insertion-ordered for stable saves. */
     private final Set<String> flags = new LinkedHashSet<>();
 
+    /**
+     * Tests whether a flag is set.
+     *
+     * @param flag the flag id
+     * @return true if the flag is set
+     */
     public boolean isSet(String flag) {
         return flags.contains(flag);
     }
 
+    /**
+     * Sets a flag. Setting an already-set flag has no effect.
+     *
+     * @param flag the flag id
+     */
     public void set(String flag) {
         flags.add(flag);
     }
 
+    /**
+     * Clears a flag. Clearing an unset flag has no effect.
+     *
+     * @param flag the flag id
+     */
     public void clear(String flag) {
         flags.remove(flag);
     }
 
+    /**
+     * All currently set flags.
+     *
+     * @return an unmodifiable view of the set flags
+     */
     public Set<String> all() {
         return Collections.unmodifiableSet(flags);
     }
 
-    /** Replaces all flags with the given collection (used by load). */
+    /**
+     * Replaces all flags with the given collection (used by load).
+     *
+     * @param newFlags the flags to restore
+     */
     public void restore(Collection<String> newFlags) {
         flags.clear();
         flags.addAll(newFlags);

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

@@ -12,7 +12,13 @@ public final class Light {
     private Light() {
     }
 
-    /** A room is lit if it is not dark, or an active light source is carried or present. */
+    /**
+     * A room is lit if it is not dark, or an active light source is carried or present.
+     *
+     * @param ctx  the active game context
+     * @param room the room to test
+     * @return true if the room is lit
+     */
     public static boolean isLit(GameContext ctx, Room room) {
         if (!room.isDark()) {
             return true;
@@ -21,11 +27,30 @@ public final class Light {
                 || hasActiveLight(room.getItems().values());
     }
 
-    /** True if the player carries an active light source (for the HUD). */
+    /**
+     * True if the player carries an active light source (for the HUD).
+     *
+     * @param ctx the active game context
+     * @return true if an active light source is in the inventory
+     */
     public static boolean carryingLight(GameContext ctx) {
         return hasActiveLight(ctx.getPlayer().getInventory().values());
     }
 
+    /**
+     * True if the player can see the contents of the room they stand in.
+     * Room items and NPCs may only be resolved when this holds; inventory
+     * items stay reachable in the dark, so a lamp can always be switched
+     * back on.
+     *
+     * @param ctx the active game context
+     * @return true if the player's current room is lit
+     */
+    public static boolean canSeeRoom(GameContext ctx) {
+        return isLit(ctx, ctx.getPlayer().getCurrentRoom());
+    }
+
+    /** Whether any of the given items is an active light source. */
     private static boolean hasActiveLight(Collection<Item> items) {
         for (Item it : items) {
             if (isActiveLight(it)) {
@@ -35,6 +60,7 @@ public final class Light {
         return false;
     }
 
+    /** A light-emitting item counts only while switched on; non-switchable ones always count. */
     private static boolean isActiveLight(Item it) {
         if (!it.isLight()) {
             return false;

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

@@ -1,4 +1,4 @@
-package thb.jeanluc.adventure.map;
+package thb.jeanluc.adventure.game;
 
 import lombok.extern.slf4j.Slf4j;
 import thb.jeanluc.adventure.io.text.CellState;
@@ -30,6 +30,16 @@ public final class MapLayout {
     private MapLayout() {
     }
 
+    /**
+     * Builds the map view for the current fog-of-war state. Visited rooms are
+     * shown by name, their unentered neighbours as unknown cells; rooms beyond
+     * those are omitted.
+     *
+     * @param world   the loaded world
+     * @param visited ids of the rooms the player has entered
+     * @param current the room the player stands in
+     * @return the map view; empty if nothing has been visited yet
+     */
     public static MapView compute(World world, Set<String> visited, Room current) {
         if (visited.isEmpty()) {
             return new MapView(List.of(), List.of());
@@ -101,6 +111,12 @@ public final class MapLayout {
         return new MapView(List.copyOf(cells.values()), connections);
     }
 
+    /**
+     * Assigns grid coordinates to every room reachable from the anchor, which
+     * sits at the origin. A room reached twice at conflicting coordinates keeps
+     * its first placement; the world geometry is then not planar and the
+     * collision is logged.
+     */
     private static Map<String, int[]> bfs(Room anchor) {
         Map<String, int[]> coords = new HashMap<>();
         Deque<Room> queue = new ArrayDeque<>();
@@ -126,6 +142,7 @@ public final class MapLayout {
         return coords;
     }
 
+    /** Grid step for a direction as {@code {dx, dy}}; y grows southwards. */
     private static int[] delta(Direction d) {
         return switch (d) {
             case NORTH -> new int[]{0, -1};

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

@@ -16,6 +16,15 @@ public final class QuestEngine {
     private QuestEngine() {
     }
 
+    /**
+     * Per-turn quest progression: starts every auto-start quest that is neither
+     * active nor completed, then repeatedly advances active quests whose current
+     * stage's completion conditions hold, announcing each finished objective and
+     * quest. Repeats until nothing changes, so a stage whose conditions are met
+     * by another stage's effects still resolves in the same turn.
+     *
+     * @param ctx the active game context
+     */
     public static void tick(GameContext ctx) {
         Map<String, Quest> quests = ctx.getWorld().getQuests();
         for (Quest q : quests.values()) {
@@ -54,6 +63,7 @@ public final class QuestEngine {
         }
     }
 
+    /** Applies a quest's completion effects, marks it done, announces it, and autosaves. */
     private static void finish(GameContext ctx, Quest q) {
         if (ctx.getQuestLog().isCompleted(q.id())) {
             return;
@@ -65,6 +75,13 @@ public final class QuestEngine {
         ctx.save();
     }
 
+    /**
+     * Builds the quest panel view: each active quest with its current objective,
+     * plus the titles of the completed quests.
+     *
+     * @param ctx the active game context
+     * @return the current quest view
+     */
     public static QuestView viewOf(GameContext ctx) {
         Map<String, Quest> quests = ctx.getWorld().getQuests();
         List<QuestEntry> active = new ArrayList<>();
@@ -85,6 +102,7 @@ public final class QuestEngine {
         return new QuestView(active, completed);
     }
 
+    /** Stage count across all quests; bounds the iteration guard in {@link #tick}. */
     private static int totalStages(Map<String, Quest> quests) {
         int total = 0;
         for (Quest q : quests.values()) {

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

@@ -10,45 +10,97 @@ import java.util.Set;
 /** Runtime quest progress: current stage per active quest, plus completed ids. */
 public class QuestLog {
 
+    /** Index of the current stage per active quest id. Insertion-ordered for stable saves. */
     private final Map<String, Integer> stageIndex = new LinkedHashMap<>();
+
+    /** Ids of quests that have been completed. Insertion-ordered for stable saves. */
     private final Set<String> completed = new LinkedHashSet<>();
 
+    /**
+     * Activates a quest at its first stage. Already active or completed quests
+     * are left untouched.
+     *
+     * @param id the quest id
+     */
     public void start(String id) {
         if (!completed.contains(id)) {
             stageIndex.putIfAbsent(id, 0);
         }
     }
 
+    /**
+     * Tests whether a quest is currently active.
+     *
+     * @param id the quest id
+     * @return true if the quest is active
+     */
     public boolean isActive(String id) {
         return stageIndex.containsKey(id);
     }
 
+    /**
+     * Tests whether a quest has been completed.
+     *
+     * @param id the quest id
+     * @return true if the quest is completed
+     */
     public boolean isCompleted(String id) {
         return completed.contains(id);
     }
 
+    /**
+     * Current stage index of a quest.
+     *
+     * @param id the quest id
+     * @return the stage index, or 0 if the quest is not active
+     */
     public int stageIndex(String id) {
         return stageIndex.getOrDefault(id, 0);
     }
 
+    /**
+     * Moves a quest on to its next stage.
+     *
+     * @param id the quest id
+     */
     public void advance(String id) {
         stageIndex.merge(id, 1, Integer::sum);
     }
 
+    /**
+     * Marks a quest completed and removes it from the active set.
+     *
+     * @param id the quest id
+     */
     public void complete(String id) {
         stageIndex.remove(id);
         completed.add(id);
     }
 
+    /**
+     * Ids of all currently active quests.
+     *
+     * @return an unmodifiable view of the active quest ids
+     */
     public Set<String> active() {
         return Collections.unmodifiableSet(stageIndex.keySet());
     }
 
+    /**
+     * Ids of all completed quests.
+     *
+     * @return an unmodifiable view of the completed quest ids
+     */
     public Set<String> completed() {
         return Collections.unmodifiableSet(completed);
     }
 
-    /** Replaces all progress with the given stage map and completed set (load). */
+    /**
+     * Replaces all progress with the given stage map and completed set (load).
+     *
+     * @param stages       stage index per active quest id
+     * @param completedIds ids of the completed quests
+     */
     public void restore(Map<String, Integer> stages, Collection<String> completedIds) {
         stageIndex.clear();
         stageIndex.putAll(stages);

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

@@ -0,0 +1,170 @@
+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 {
+
+    /** The walkthrough content: intro, steps, and closing tips. */
+    private final Tutorial tutorial;
+
+    /** Command lookup, used to compare a typed verb against a step's expected command via aliases. */
+    private final CommandRegistry registry;
+
+    /** Index of the step currently being taught. */
+    private int index;
+
+    /** False once all steps are done or the walkthrough was skipped. */
+    private boolean active;
+
+    /** True once {@link #begin(GameContext)} has printed the intro; guards against a second run. */
+    private boolean begun;
+
+    /** Room the player stood in when the current step began; used to detect movement steps. */
+    private Room roomAtStepStart;
+
+    /**
+     * Creates a guide for the given walkthrough. The guide starts inactive if
+     * the tutorial has no steps.
+     *
+     * @param tutorial the walkthrough content
+     * @param registry command lookup for alias-aware verb comparison
+     */
+    public TutorialGuide(Tutorial tutorial, CommandRegistry registry) {
+        this.tutorial = tutorial;
+        this.registry = registry;
+        this.active = !tutorial.isEmpty();
+    }
+
+    /**
+     * Reports whether the guide still has steps left to hand out.
+     *
+     * @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).
+     *
+     * @param ctx the active game context
+     */
+    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:
+     * on success prints the confirmation and advances (ending the walkthrough
+     * after the last step), otherwise prints the step's hint.
+     *
+     * @param ctx    the active game context
+     * @param parsed 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).
+     *
+     * @param ctx the active game context
+     */
+    public void skip(GameContext ctx) {
+        if (active) {
+            ctx.getIo().write("Tutorial skipped.");
+            active = false;
+        }
+    }
+
+    /** Prints the current step's instruction and records the room it started in. */
+    private void enterStep(GameContext ctx) {
+        roomAtStepStart = ctx.getPlayer().getCurrentRoom();
+        ctx.getIo().write(tutorial.steps().get(index).instruction());
+    }
+
+    /**
+     * Whether the executed command fulfils the step. The pseudo-expectations
+     * {@code go_direction} and {@code go_to_room} additionally require an actual
+     * room change; every other expectation matches on the command (aliases
+     * included) and the step's minimum argument count.
+     */
+    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();
+    }
+
+    /** Whether the first argument parses as a {@link Direction} (rather than a room name). */
+    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;
+        }
+    }
+
+    /** Whether the player left the room the current step started in. */
+    private boolean moved(GameContext ctx) {
+        return roomAtStepStart != null
+                && ctx.getPlayer().getCurrentRoom() != roomAtStepStart;
+    }
+
+    /** Whether both verbs resolve to the same registered command, so aliases count as a match. */
+    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

@@ -23,28 +23,70 @@ import java.util.List;
 public class ConsoleIO implements GameIO {
 
     /** Whether ANSI colour is emitted. */
-    public enum ColorMode { ON, OFF, AUTO }
+    public enum ColorMode {
+
+        /** Always emit ANSI escape codes. */
+        ON,
+
+        /** Never emit ANSI escape codes; plain text only. */
+        OFF,
+
+        /** Emit colour only when attached to a real console, not when piped. */
+        AUTO
+    }
 
     /** Frame/glyph fidelity tier. */
-    public enum GlyphMode { ASCII, UNICODE, GLYPH }
+    public enum GlyphMode {
 
+        /** Frames drawn with {@code +} and {@code -}, for terminals without Unicode. */
+        ASCII,
+
+        /** Frames drawn with Unicode box-drawing characters. */
+        UNICODE,
+
+        /** Highest tier: Unicode frames plus decorative glyphs. */
+        GLYPH
+    }
+
+    /** Total width of a room frame, in characters. */
     private static final int FRAME_WIDTH = 44;
 
+    /** Source the player's commands are read from. */
     private final BufferedReader in;
+
+    /** Sink all output is written to. */
     private final PrintStream out;
+
+    /** Whether ANSI colour codes are currently emitted; resolved from a {@link ColorMode}. */
     private boolean useColor;
+
+    /** Frame/glyph fidelity tier currently in use. */
     private GlyphMode glyphs;
 
+    /** Reads from {@code System.in} and writes to {@code System.out}, colour auto-detected. */
     public ConsoleIO() {
         this(new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8)),
                 System.out, ColorMode.AUTO, GlyphMode.UNICODE);
     }
 
-    /** Backward-compatible stream constructor (colour off, unicode frames). */
+    /**
+     * Backward-compatible stream constructor (colour off, unicode frames).
+     *
+     * @param in  source of the player's commands
+     * @param out sink for all output
+     */
     public ConsoleIO(BufferedReader in, PrintStream out) {
         this(in, out, ColorMode.OFF, GlyphMode.UNICODE);
     }
 
+    /**
+     * Creates a console IO bound to the given streams and fidelity settings.
+     *
+     * @param in        source of the player's commands
+     * @param out       sink for all output
+     * @param colorMode whether ANSI colour is emitted
+     * @param glyphs    frame/glyph fidelity tier
+     */
     public ConsoleIO(BufferedReader in, PrintStream out, ColorMode colorMode, GlyphMode glyphs) {
         this.in = in;
         this.out = out;
@@ -52,7 +94,11 @@ public class ConsoleIO implements GameIO {
         setColorMode(colorMode);
     }
 
-    /** Re-resolves colour emission from the given mode (AUTO checks the console). */
+    /**
+     * Re-resolves colour emission from the given mode (AUTO checks the console).
+     *
+     * @param mode the colour mode to apply
+     */
     public void setColorMode(ColorMode mode) {
         this.useColor = switch (mode) {
             case ON -> true;
@@ -61,7 +107,11 @@ public class ConsoleIO implements GameIO {
         };
     }
 
-    /** Switches the frame/glyph fidelity tier live. */
+    /**
+     * Switches the frame/glyph fidelity tier live.
+     *
+     * @param mode the tier to apply
+     */
     public void setGlyphMode(GlyphMode mode) {
         this.glyphs = mode;
     }
@@ -118,6 +168,14 @@ public class ConsoleIO implements GameIO {
         print(AsciiMap.render(view, glyphs != GlyphMode.ASCII));
     }
 
+    /**
+     * Builds one indented, labelled line listing the given entries.
+     *
+     * @param label dim heading in front of the entries
+     * @param xs    the entries
+     * @param st    style applied to each entry
+     * @return the rendered line
+     */
     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++) {
@@ -129,6 +187,10 @@ public class ConsoleIO implements GameIO {
         return sb.toString();
     }
 
+    /**
+     * @param title room name embedded in the top border
+     * @return the top border of a room frame, {@link #FRAME_WIDTH} characters wide
+     */
     private String frameTop(String title) {
         String tl = glyphs == GlyphMode.ASCII ? "+" : "┌";
         String tr = glyphs == GlyphMode.ASCII ? "+" : "┐";
@@ -141,6 +203,9 @@ public class ConsoleIO implements GameIO {
         return sb.append(tr).toString();
     }
 
+    /**
+     * @return the bottom border of a room frame, {@link #FRAME_WIDTH} characters wide
+     */
     private String frameBottom() {
         String bl = glyphs == GlyphMode.ASCII ? "+" : "└";
         String br = glyphs == GlyphMode.ASCII ? "+" : "┘";
@@ -152,6 +217,13 @@ public class ConsoleIO implements GameIO {
         return sb.append(br).toString();
     }
 
+    /**
+     * Wraps the text in the ANSI escape codes of the given role.
+     *
+     * @param st the semantic role
+     * @param s  the text
+     * @return the text unchanged when colour is disabled, else the coloured text
+     */
     private String paint(Style st, String s) {
         if (!useColor) {
             return s;

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

@@ -18,43 +18,108 @@ import java.util.List;
  */
 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; empty string at end of input.
+     *
+     * @return the line the player entered
+     */
     String readLine();
 
-    /** Renders one styled output block. The only method implementors must provide. */
+    /**
+     * Renders one styled output block. The only method implementors must provide.
+     *
+     * @param text the block to render
+     */
     void print(StyledText text);
 
-    /** Convenience: a plain, unstyled line. */
+    /**
+     * Convenience: a plain, unstyled line.
+     *
+     * @param s the text to write
+     */
     default void write(String s) {
         print(StyledText.of(s));
     }
 
-    /** Renders a room. Default flattens via {@link Renderings}; renderers may override. */
+    /**
+     * Renders a room. Default flattens via {@link Renderings}; renderers may override.
+     *
+     * @param room the room snapshot to render
+     */
     default void showRoom(RoomView room) {
         print(Renderings.roomToStyledText(room));
     }
 
-    /** Updates the status/HUD region. No-op by default; renderers may override. */
+    /**
+     * Updates the status/HUD region. No-op by default; renderers may override.
+     *
+     * @param hud the status snapshot
+     */
     default void setHud(Hud hud) {
         // no-op
     }
 
-    /** Per-turn push of the current map. GUI repaints its panel; console ignores. */
+    /**
+     * Per-turn push of the current map. GUI repaints its panel; console ignores.
+     *
+     * @param view the map snapshot
+     */
     default void setMap(MapView view) {
         // no-op
     }
 
-    /** On-demand map (the 'map' command). Default renders ASCII (Unicode frames). */
+    /**
+     * 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).
+     *
+     * @param view the map snapshot
+     */
     default void showMap(MapView view) {
         print(AsciiMap.render(view, true));
     }
 
-    /** Per-turn push of the quest log. GUI repaints its box; console ignores. */
+    /**
+     * Per-turn push of the quest log. GUI repaints its box; console ignores.
+     *
+     * @param view the quest snapshot
+     */
     default void setQuests(QuestView view) {
         // no-op
     }
 
-    /** On-demand quest log (the 'quests' command). Default renders styled text. */
+    /**
+     * Per-turn current-room music track; null/blank = silence. Console no-op; GUI plays.
+     *
+     * @param track the current room's track name; null or blank means silence
+     */
+    default void setMusic(String track) {
+        // no audio in text mode
+    }
+
+    /**
+     * Applies the music volume/level. Console no-op; GUI sets it.
+     *
+     * @param level the level to apply
+     */
+    default void setMusicLevel(MusicLevel level) {
+        // no audio in text mode
+    }
+
+    /**
+     * On-demand quest log (the 'quests' command). Default renders styled text.
+     *
+     * @param view the quest snapshot
+     */
     default void showQuests(QuestView view) {
         print(QuestText.render(view));
     }
@@ -92,4 +157,14 @@ public interface GameIO {
             write("Please enter a number between 1 and " + options.size() + ".");
         }
     }
+
+    /**
+     * Tears the frontend down after the main-menu loop ends (the player chose
+     * Quit). Console mode has nothing to release and exits naturally when
+     * {@code main} returns; the GUI overrides this to close its window and
+     * terminate the JVM, which would otherwise stay alive on the Swing EDT.
+     */
+    default void shutdown() {
+        // no-op in text mode
+    }
 }

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

@@ -31,30 +31,64 @@ import java.util.List;
  */
 public class MapPanel extends JComponent {
 
+    /** Unscaled room width, in pixels. */
     private static final int BASE_CELL_W = 96;
+
+    /** Unscaled room height, in pixels. */
     private static final int BASE_CELL_H = 46;
+
+    /** Unscaled horizontal gap between two rooms, in pixels. */
     private static final int BASE_GAP_X = 34;
+
+    /** Unscaled vertical gap between two rooms, in pixels. */
     private static final int BASE_GAP_Y = 30;
+
+    /** Unscaled padding around the whole map, in pixels. */
     private static final int BASE_PAD = 16;
+
+    /** Unscaled size of the room-label font, in points. */
     private static final float BASE_FONT = 11f;
 
+    /** Panel background. */
     private static final Color BG = new Color(0x0e, 0x12, 0x18);
+
+    /** Line colour of a corridor between two visited rooms. */
     private static final Color CORRIDOR = new Color(0x46, 0x70, 0x8a);
+
+    /** Outline colour of a {@link CellState#VISITED} room. */
     private static final Color VISITED = new Color(0xcf, 0xd6, 0xe0);
+
+    /** Outline colour of the {@link CellState#CURRENT} room. */
     private static final Color CURRENT = new Color(0xe6, 0xc3, 0x4a);
+
+    /** Outline colour of a {@link CellState#KNOWN} but unvisited room. */
     private static final Color KNOWN = new Color(0x3a, 0x46, 0x55);
 
+    /** Font the room labels are derived from. */
     private final Font baseFont;
+
+    /** User zoom multiplier, applied on top of the fit-to-panel scale. */
     private float zoom = 1f;
+
+    /** The map currently drawn; empty until the first {@link #show(MapView)}. */
     private MapView view = new MapView(List.of(), List.of());
 
+    /**
+     * Creates an empty map panel; a map appears with the first {@link #show(MapView)}.
+     *
+     * @param font font the room labels are derived from
+     */
     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). */
+    /**
+     * Sets the user zoom multiplier (applied on top of the fit-to-panel scale).
+     *
+     * @param zoom the multiplier; clamped to a minimum of 0.4
+     */
     public void setZoom(float zoom) {
         SwingUtilities.invokeLater(() -> {
             this.zoom = Math.max(0.4f, zoom);
@@ -63,7 +97,11 @@ public class MapPanel extends JComponent {
         });
     }
 
-    /** Replaces the rendered map. */
+    /**
+     * Replaces the rendered map.
+     *
+     * @param v the new map snapshot
+     */
     public void show(MapView v) {
         SwingUtilities.invokeLater(() -> {
             this.view = v;
@@ -72,7 +110,11 @@ public class MapPanel extends JComponent {
         });
     }
 
-    /** The space the map should fit into: the enclosing scroll pane's viewport area. */
+    /**
+     * The space the map should fit into: the enclosing scroll pane's viewport area.
+     *
+     * @return the viewport area, this panel's own size, or a fixed fallback
+     */
     private Dimension available() {
         Container p = getParent();
         if (p instanceof JViewport && p.getParent() instanceof JScrollPane sp) {
@@ -87,6 +129,10 @@ public class MapPanel extends JComponent {
         return (s.width > 0 && s.height > 0) ? s : new Dimension(220, 320);
     }
 
+    /**
+     * @return the highest occupied column and row of the map grid, as
+     *         {@code [maxX, maxY]}
+     */
     private int[] gridBounds() {
         int maxX = 0;
         int maxY = 0;
@@ -97,7 +143,13 @@ public class MapPanel extends JComponent {
         return new int[]{maxX, maxY};
     }
 
-    /** Fit-to-panel scale times the user zoom. */
+    /**
+     * Fit-to-panel scale times the user zoom.
+     *
+     * @param avail the space available to the map
+     * @param b     grid bounds as returned by {@link #gridBounds()}
+     * @return the effective drawing scale
+     */
     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;
@@ -109,6 +161,11 @@ public class MapPanel extends JComponent {
         return (float) (fit * zoom);
     }
 
+    /**
+     * @param eff the effective drawing scale
+     * @param b   grid bounds as returned by {@link #gridBounds()}
+     * @return the size of the drawn map at that scale, including padding
+     */
     private Dimension content(float eff, int[] b) {
         int pad = Math.round(BASE_PAD * eff);
         int cw = Math.round(BASE_CELL_W * eff);

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

@@ -0,0 +1,26 @@
+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}.
+     *
+     * @param track  name of the track to play
+     * @param gainDb target volume in decibels
+     */
+    void fadeTo(String track, float gainDb);
+
+    /** Fade the current track out and stop. */
+    void fadeOut();
+
+    /**
+     * Set the playback volume immediately.
+     *
+     * @param gainDb target volume in decibels
+     */
+    void setGainDb(float gainDb);
+
+    /** Stop playback and release resources. */
+    void shutdown();
+}

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

@@ -0,0 +1,78 @@
+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 {
+
+    /** Backend the raw playback operations are delegated to. */
+    private final MusicBackend backend;
+
+    /** Volume level currently selected in the Settings menu. */
+    private MusicLevel level = MusicLevel.MEDIUM;
+
+    /** Track currently selected, or null when silent. */
+    private String current; // currently selected track, or null = silence
+
+    /**
+     * Creates a controller starting silent at {@link MusicLevel#MEDIUM}.
+     *
+     * @param backend backend that performs the actual playback
+     */
+    public MusicController(MusicBackend backend) {
+        this.backend = backend;
+    }
+
+    /**
+     * Called per turn with the current room's music field (may be null/blank).
+     * Does nothing while the level is {@link MusicLevel#OFF} or the track is
+     * already playing.
+     *
+     * @param track the room's track name; null or blank means silence
+     */
+    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). Switching to
+     * {@link MusicLevel#OFF} fades out; switching back on replays on the next
+     * {@link #room(String)} call.
+     *
+     * @param newLevel the level to apply
+     */
+    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());
+        }
+    }
+
+    /** Stops playback and releases the backend's resources. */
+    public void shutdown() {
+        backend.shutdown();
+    }
+}

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

@@ -0,0 +1,48 @@
+package thb.jeanluc.adventure.io;
+
+/** Background-music volume level, cycled in the Settings menu. */
+public enum MusicLevel {
+    /** Music disabled; nothing is played. */
+    OFF,
+
+    /** Quiet background music. */
+    LOW,
+
+    /** Default volume. */
+    MEDIUM,
+
+    /** Full volume, without attenuation. */
+    HIGH;
+
+    /**
+     * Target MASTER_GAIN in decibels. Irrelevant for {@link #OFF} (playback disabled).
+     *
+     * @return the gain of this level
+     */
+    public float gainDb() {
+        return switch (this) {
+            case OFF -> Float.NEGATIVE_INFINITY;
+            case LOW -> -20f;
+            case MEDIUM -> -10f;
+            case HIGH -> 0f;
+        };
+    }
+
+    /**
+     * Reports whether this level permits playback.
+     *
+     * @return true when music should play
+     */
+    public boolean isOn() {
+        return this != OFF;
+    }
+
+    /**
+     * Next level in the cycle (wraps HIGH → OFF).
+     *
+     * @return the following level
+     */
+    public MusicLevel next() {
+        return values()[(ordinal() + 1) % values().length];
+    }
+}

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

@@ -0,0 +1,251 @@
+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.util.concurrent.atomic.AtomicBoolean;
+import java.io.BufferedInputStream;
+import java.io.InputStream;
+
+/**
+ * Streams OGG Vorbis tracks bundled on the classpath under {@code /music/}
+ * 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 {
+
+    /** Classpath directory the bundled tracks are looked up in. */
+    private static final String MUSIC_DIR = "/music/";
+
+    /** Duration of a fade-in or fade-out, in milliseconds. */
+    private static final int FADE_MS = 400;
+
+    /** Number of gain steps a fade is split into. */
+    private static final int FADE_STEPS = 20;
+
+    /** Size of the PCM transfer buffer, in bytes. */
+    private static final int BUFFER = 4096;
+
+    /** Gain a fade starts from and ends at, in decibels. */
+    private static final float FLOOR_DB = -40f; // near-silence for fades
+
+    /** The currently playing thread, or null when silent. */
+    private volatile Thread playThread;
+
+    /**
+     * Stop token of the current play thread. Each playback owns its own token
+     * rather than sharing one flag: if {@link #stopCurrent()} times out waiting
+     * for a thread, that thread's token stays set, so it still winds down and
+     * can never be revived by the next {@link #fadeTo}.
+     */
+    private volatile AtomicBoolean playStop;
+
+    /** Output line of the current playback, used by {@link #setGainDb}. */
+    private volatile SourceDataLine line;
+
+    /** Gain most recently requested by the player, in decibels. */
+    private volatile float targetGainDb = MusicLevel.MEDIUM.gainDb();
+
+    /**
+     * Stops the current track and starts {@code track} on a fresh daemon thread,
+     * fading in to {@code gainDb}. A track that is not on the classpath is logged
+     * and leaves playback silent.
+     *
+     * @param track  file name below {@code /music/}
+     * @param gainDb target MASTER_GAIN in decibels
+     */
+    @Override
+    public synchronized void fadeTo(String track, float gainDb) {
+        stopCurrent();
+        targetGainDb = gainDb;
+        String resource = MUSIC_DIR + track;
+        if (getClass().getResource(resource) == null) {
+            log.warn("Music resource not found, staying silent: {}", resource);
+            return;
+        }
+        AtomicBoolean stop = new AtomicBoolean(false);
+        playStop = stop;
+        playThread = new Thread(() -> playLoop(resource, gainDb, stop), "music");
+        playThread.setDaemon(true);
+        playThread.start();
+    }
+
+    /** Fades the current track out and stops the play thread. */
+    @Override
+    public synchronized void fadeOut() {
+        stopCurrent();
+    }
+
+    /**
+     * Applies a new gain to the running playback immediately, without a fade.
+     *
+     * @param gainDb target MASTER_GAIN in decibels
+     */
+    @Override
+    public synchronized void setGainDb(float gainDb) {
+        targetGainDb = gainDb;
+        SourceDataLine l = line;
+        if (l != null) {
+            applyGain(l, gainDb);
+        }
+    }
+
+    /** Stops playback and releases the audio line. */
+    @Override
+    public synchronized void shutdown() {
+        stopCurrent();
+    }
+
+    /**
+     * Signals the play thread to stop and waits for its fade-out + cleanup.
+     * The thread's stop token stays set even if the join times out, so a slow
+     * thread still terminates on its own instead of playing on forever.
+     */
+    private void stopCurrent() {
+        Thread t = playThread;
+        AtomicBoolean stop = playStop;
+        if (t == null) {
+            return;
+        }
+        if (stop != null) {
+            stop.set(true);
+        }
+        try {
+            t.join(FADE_MS + 600L);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+        if (t.isAlive()) {
+            log.warn("Music thread did not stop within the join budget; it will wind down on its own");
+        }
+        playThread = null;
+        playStop = null;
+    }
+
+    /**
+     * Body of the play thread: decodes the resource to PCM and writes it to the
+     * output line, restarting at the end of the stream until {@code stop} is set.
+     * Decoding failures are logged and end playback. Runs a fade-out on exit.
+     *
+     * @param resource classpath path of the OGG file
+     * @param gainDb   gain to fade in to
+     * @param stop     this playback's stop token
+     */
+    private void playLoop(String resource, float gainDb, AtomicBoolean stop) {
+        SourceDataLine l = null;
+        try {
+            while (!stop.get()) {
+                // Reopen the bundled resource each loop; BufferedInputStream gives
+                // the SPI the mark/reset support it needs to read the OGG header.
+                try (InputStream res = getClass().getResourceAsStream(resource);
+                     AudioInputStream in = AudioSystem.getAudioInputStream(new BufferedInputStream(res))) {
+                    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();
+                            // Only publish the line if this playback is still current.
+                            if (playStop == stop) {
+                                line = l;
+                            }
+                            ramp(l, FLOOR_DB, gainDb, stop); // fade in once
+                        }
+                        byte[] buf = new byte[BUFFER];
+                        int n;
+                        while (!stop.get() && (n = din.read(buf, 0, buf.length)) != -1) {
+                            l.write(buf, 0, n);
+                        }
+                    }
+                }
+            }
+        } catch (Exception e) {
+            log.warn("Music playback failed for {}: {}", resource, e.getMessage());
+        } finally {
+            if (l != null) {
+                try {
+                    // Fade-out must run to completion, so it gets a fresh token.
+                    ramp(l, currentGain(l), FLOOR_DB, new AtomicBoolean(false));
+                } catch (RuntimeException ignored) {
+                    // best-effort fade
+                }
+                l.stop();
+                l.close();
+            }
+            // Only clear the shared line if it still belongs to this playback.
+            if (playStop == stop) {
+                line = null;
+            }
+        }
+    }
+
+    /**
+     * Ramps the gain, aborting early if this playback has been stopped.
+     *
+     * @param l      the line to ramp
+     * @param fromDb starting gain in decibels
+     * @param toDb   final gain in decibels
+     * @param stop   stop token checked between steps
+     */
+    private void ramp(SourceDataLine l, float fromDb, float toDb, AtomicBoolean stop) {
+        for (int i = 0; i <= FADE_STEPS; i++) {
+            if (stop.get()) {
+                return;
+            }
+            applyGain(l, fromDb + (toDb - fromDb) * i / FADE_STEPS);
+            sleep(FADE_MS / FADE_STEPS);
+        }
+    }
+
+    /**
+     * @param l the line to read
+     * @return the line's current gain, or {@link #targetGainDb} if the platform
+     *         offers no master-gain control
+     */
+    private float currentGain(SourceDataLine l) {
+        try {
+            return ((FloatControl) l.getControl(FloatControl.Type.MASTER_GAIN)).getValue();
+        } catch (IllegalArgumentException e) {
+            return targetGainDb;
+        }
+    }
+
+    /**
+     * Sets the line's gain, clamped to the range it supports. Lines without a
+     * master-gain control are left untouched.
+     *
+     * @param l  the line to adjust
+     * @param db requested gain in decibels
+     */
+    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
+        }
+    }
+
+    /**
+     * Sleeps, restoring the interrupt flag instead of propagating.
+     *
+     * @param ms milliseconds to sleep
+     */
+    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

@@ -18,6 +18,11 @@ import java.awt.Insets;
 /** Read-only styled view of the quest log, shown under the map. */
 public class QuestPanel extends JTextPane {
 
+    /**
+     * Creates an empty, read-only panel; content arrives via {@link #show(QuestView)}.
+     *
+     * @param font font the panel text is derived from
+     */
     public QuestPanel(Font font) {
         setEditable(false);
         setBackground(new Color(0x0b, 0x0e, 0x13));
@@ -26,6 +31,11 @@ public class QuestPanel extends JTextPane {
         setMargin(new Insets(8, 10, 8, 10));
     }
 
+    /**
+     * Replaces the panel's content with the given quest log.
+     *
+     * @param view the quest snapshot to render
+     */
     public void show(QuestView view) {
         SwingUtilities.invokeLater(() -> {
             StyledDocument doc = getStyledDocument();
@@ -46,6 +56,10 @@ public class QuestPanel extends JTextPane {
         });
     }
 
+    /**
+     * @param s the semantic role
+     * @return the colour this panel paints that role in
+     */
     private Color colorFor(Style s) {
         return switch (s) {
             case HEADING -> new Color(0xc9, 0x8a, 0xe0);

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

@@ -14,14 +14,15 @@ import javax.swing.Box;
 import javax.swing.BoxLayout;
 import javax.swing.JButton;
 import javax.swing.JComponent;
-import javax.swing.JDialog;
 import javax.swing.JFrame;
+import javax.swing.JOptionPane;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 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;
@@ -29,10 +30,13 @@ 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;
@@ -63,22 +67,55 @@ public class SwingIO implements GameIO {
     /** Unscaled size for the HUD and side-panel font, in points. */
     private static final float SMALL_SIZE = 12.5f;
 
-    /** Side-panel width as a fraction of the window width, clamped by the bounds below. */
+    /** Delay between rooms while animating a go-to auto-walk, in milliseconds. */
-    private static final double SIDE_RATIO = 0.28;
+    private static final long TRAVEL_STEP_MS = 300L;
-    private static final int SIDE_MIN = 180;
-    private static final int SIDE_MAX = 460;
 
+    /** Side-panel width as a fraction of the window width, with a lower bound only. */
+    private static final double SIDE_RATIO = 0.34;
+
+    /** Lower bound for the side-panel width, in unscaled pixels. */
+    private static final int SIDE_MIN = 220;
+
+    /** Background music of the current room. */
+    private final MusicController music = new MusicController(new OggMusicBackend());
+
+    /**
+     * Lines typed into the input field, handed from the Swing EDT to the game
+     * loop, which blocks on {@link #readLine()}.
+     */
     private final LinkedBlockingQueue<String> inputs = new LinkedBlockingQueue<>();
+
+    /** The game window. */
     private final JFrame frame;
+
+    /** Centre region: the scrolling transcript of styled output. */
     private final JTextPane output;
+
+    /** Document behind {@link #output}; all text is appended to it. */
     private final StyledDocument doc;
+
+    /** Bottom region: the command line the player types into. */
     private final JTextField input;
+
+    /** Top region: the single-line status bar. */
     private final JLabel hud;
+
+    /** Right region (upper): the drawn map. */
     private final MapPanel map;
+
+    /** Scroll pane wrapping {@link #map}. */
     private final JScrollPane sideScroll;
+
+    /** Right region (lower): the quest log. */
     private final QuestPanel quests;
+
+    /** Scroll pane wrapping {@link #quests}. */
     private final JScrollPane questScroll;
+
+    /** Right region: container holding {@link #sideScroll} and {@link #questScroll}. */
     private final JPanel sidePanel;
+
+    /** Font all component fonts are derived from; bundled TTF or a monospaced fallback. */
     private final Font baseFont;
 
     /** Detected display scale (≥ 1.0); HiDPI panels report > 1.0 where supported. */
@@ -87,6 +124,12 @@ public class SwingIO implements GameIO {
     /** User zoom multiplier, adjusted live via keyboard. */
     private float zoom = 1f;
 
+    /**
+     * Builds the window, wires the input field to the input queue, installs the
+     * zoom keys, and shows the frame.
+     *
+     * @param title window title
+     */
     public SwingIO(String title) {
         baseFont = loadFont();
         uiScale = detectScale();
@@ -138,6 +181,7 @@ public class SwingIO implements GameIO {
             public void componentResized(ComponentEvent e) {
                 updateSideWidth();
                 applyFonts();
+                rescaleMenuOverlayIfVisible();
             }
         });
 
@@ -149,7 +193,11 @@ public class SwingIO implements GameIO {
         input.requestFocusInWindow();
     }
 
-    /** Loads the bundled font if present, else falls back to a logical monospaced font. */
+    /**
+     * Loads the bundled font if present, else falls back to a logical monospaced font.
+     *
+     * @return the font all component fonts are derived from
+     */
     private Font loadFont() {
         try (InputStream in = getClass().getResourceAsStream("/fonts/game.ttf")) {
             if (in != null) {
@@ -163,7 +211,11 @@ public class SwingIO implements GameIO {
         return new Font(Font.MONOSPACED, Font.PLAIN, 12);
     }
 
-    /** Detects the display scale; HiDPI-aware where the platform reports it, else uses DPI. */
+    /**
+     * Detects the display scale; HiDPI-aware where the platform reports it, else uses DPI.
+     *
+     * @return the display scale, at least 1.0
+     */
     private float detectScale() {
         try {
             GraphicsConfiguration gc = GraphicsEnvironment.getLocalGraphicsEnvironment()
@@ -183,11 +235,10 @@ public class SwingIO implements GameIO {
         }
     }
 
-    /** Sizes the side panel to a fraction of the window width, clamped to [min, max] (scaled). */
+    /** Sizes the side panel to a fraction of the window width, with a scaled lower bound. */
     private void updateSideWidth() {
         int min = (int) (SIDE_MIN * uiScale);
-        int max = (int) (SIDE_MAX * uiScale);
+        int target = Math.max(min, (int) (frame.getWidth() * SIDE_RATIO));
-        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();
@@ -201,6 +252,8 @@ public class SwingIO implements GameIO {
      * 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.
+     *
+     * @return the auto-scale, clamped to 0.6–2.6
      */
     private float frameScale() {
         double s = Math.min(frame.getWidth() / 900.0, frame.getHeight() / 600.0);
@@ -236,10 +289,23 @@ public class SwingIO implements GameIO {
         root.getActionMap().put("zoomReset", action(e -> setZoom(1f)));
     }
 
+    /**
+     * Maps a key stroke to an action name on the component's window-scoped input map.
+     *
+     * @param c    the component whose input map is extended
+     * @param ks   the key stroke to bind
+     * @param name the action-map key it triggers
+     */
     private void bind(JComponent c, KeyStroke ks, String name) {
         c.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(ks, name);
     }
 
+    /**
+     * Adapts a lambda to a Swing action.
+     *
+     * @param body code run when the action fires
+     * @return the action
+     */
     private AbstractAction action(java.util.function.Consumer<ActionEvent> body) {
         return new AbstractAction() {
             @Override
@@ -249,11 +315,20 @@ public class SwingIO implements GameIO {
         };
     }
 
+    /**
+     * Sets the zoom, clamped to 0.6–3.0, and re-applies the fonts.
+     *
+     * @param z the requested zoom multiplier
+     */
     private void setZoom(float z) {
         zoom = Math.max(0.6f, Math.min(3.0f, z));
         applyFonts();
     }
 
+    /**
+     * @param s the semantic role
+     * @return the colour this frontend paints that role in
+     */
     private Color colorFor(Style s) {
         return switch (s) {
             case HEADING -> new Color(0xc9, 0x8a, 0xe0);
@@ -266,6 +341,12 @@ public class SwingIO implements GameIO {
         };
     }
 
+    /**
+     * Appends the spans to the output pane and scrolls to the end. Runs on the
+     * Swing EDT; safe to call from the game loop.
+     *
+     * @param spans the styled runs to append
+     */
     private void appendSpans(List<Span> spans) {
         SwingUtilities.invokeLater(() -> {
             try {
@@ -326,11 +407,63 @@ public class SwingIO implements GameIO {
         SwingUtilities.invokeLater(() -> hud.setText(txt));
     }
 
+    @Override
+    public void setMusic(String track) {
+        music.room(track);
+    }
+
+    @Override
+    public void setMusicLevel(MusicLevel level) {
+        music.level(level);
+    }
+
+    /**
+     * Closes the GUI when the player quits from the main menu. Stops music,
+     * disposes the window, and terminates the JVM — mirroring the native
+     * window-close (EXIT_ON_CLOSE); without this the EDT keeps the process
+     * alive and the dismissed menu overlay just reveals the game underneath.
+     */
+    @Override
+    public void shutdown() {
+        music.shutdown();
+        SwingUtilities.invokeLater(() -> {
+            frame.dispose();
+            System.exit(0);
+        });
+    }
+
+    /**
+     * Reports an unrecoverable error and closes the GUI. The game loop runs on
+     * the only thread that consumes player input, so if it dies the window would
+     * otherwise stay open and silently swallow every command. Shows a modal
+     * dialog, then exits.
+     *
+     * @param message text shown to the player
+     */
+    public void fatal(String message) {
+        music.shutdown();
+        SwingUtilities.invokeLater(() -> {
+            JOptionPane.showMessageDialog(frame, message, "Haunted Manor", JOptionPane.ERROR_MESSAGE);
+            frame.dispose();
+            System.exit(1);
+        });
+    }
+
     @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);
@@ -348,41 +481,12 @@ public class SwingIO implements GameIO {
 
     @Override
     public int choose(String title, List<String> options) {
-        // Same EDT↔worker handoff as readLine: the worker blocks on take(),
+        // Full-window overlay (glass pane), not a floating dialog: it covers the game
-        // the EDT (button click / window close) offers the chosen index.
+        // 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(() -> {
+        SwingUtilities.invokeLater(() -> showMenuOverlay(title, options, picked));
-            JDialog dialog = new JDialog(frame, title, true);
-            JPanel panel = new JPanel();
-            panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
-            panel.setBorder(BorderFactory.createEmptyBorder(12, 12, 12, 12));
-            panel.add(new JLabel(title));
-            panel.add(Box.createVerticalStrut(8));
-            for (int i = 0; i < options.size(); i++) {
-                int idx = i;
-                JButton b = new JButton(options.get(i));
-                b.setAlignmentX(0f);
-                b.addActionListener(e -> {
-                    dialog.dispose();
-                    picked.offer(idx);
-                });
-                panel.add(b);
-                panel.add(Box.createVerticalStrut(4));
-            }
-            // Closing the dialog counts as the last (safe/cancel) option.
-            dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
-            dialog.addWindowListener(new java.awt.event.WindowAdapter() {
-                @Override
-                public void windowClosing(java.awt.event.WindowEvent e) {
-                    dialog.dispose();
-                    picked.offer(options.size() - 1);
-                }
-            });
-            dialog.setContentPane(panel);
-            dialog.pack();
-            dialog.setLocationRelativeTo(frame);
-            dialog.setVisible(true);
-        });
         try {
             return picked.take();
         } catch (InterruptedException e) {
@@ -391,6 +495,179 @@ public class SwingIO implements GameIO {
         }
     }
 
+    /** Current menu being shown, so a window resize can rebuild it at the new scale. */
+    private String menuTitle;
+
+    /** Options of the menu currently shown, or null when no menu is visible. */
+    private List<String> menuOptions;
+
+    /** Queue the current menu's chosen index is offered to. */
+    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.
+     * Disables the input field while the menu is up. A button click offers that
+     * button's index to {@code picked}; Escape offers the last option.
+     *
+     * @param title  heading shown above the options
+     * @param options option labels, one button each
+     * @param picked queue the chosen index is offered to
+     */
+    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);
+        // The glass pane swallows mouse events but cannot take keyboard focus,
+        // so the input field would stay live behind the menu and queue commands
+        // that get replayed once the menu closes. Disable it for the duration.
+        input.setEnabled(false);
+        glass.requestFocusInWindow();
+    }
+
+    /**
+     * Hides the menu overlay, discards anything typed while it was up, and
+     * returns focus to the input field.
+     */
+    private void hideMenuOverlay() {
+        menuOptions = null; // stop resize rebuilds once the menu is dismissed
+        frame.getGlassPane().setVisible(false);
+        // Drop anything typed before the field was disabled, so a stale line
+        // cannot be replayed as a game command.
+        inputs.clear();
+        input.setEnabled(true);
+        input.requestFocusInWindow();
+    }
+
+    /** Palette for the themed menu overlay, matching the game window's dark look. */
+    private static final Color MENU_BG = new Color(0x0b, 0x0e, 0x13);
+
+    /** Colour of the menu heading. */
+    private static final Color MENU_TITLE = new Color(0xc9, 0x8a, 0xe0);
+
+    /** Menu-button background at rest. */
+    private static final Color BTN_BG = new Color(0x16, 0x1b, 0x24);
+
+    /** Menu-button background under the mouse. */
+    private static final Color BTN_BG_HOVER = new Color(0x22, 0x2a, 0x37);
+
+    /** Menu-button label colour. */
+    private static final Color BTN_FG = new Color(0xcf, 0xd6, 0xe0);
+
+    /** Menu-button outline at rest. */
+    private static final Color BTN_LINE = new Color(0x2a, 0x2f, 0x3a);
+
+    /** Menu-button outline under the mouse. */
+    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.
+     *
+     * @param text  the button label
+     * @param scale the scale its size and font are derived from
+     * @return the button
+     */
+    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;
+    }
+
+    /**
+     * @param line outline colour
+     * @param padV vertical inner padding, in pixels
+     * @param padH horizontal inner padding, in pixels
+     * @return a one-pixel outline with the given inner padding
+     */
+    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));
+    }
+
+    /**
+     * Appends the entries as comma-separated spans of the given style.
+     *
+     * @param spans target list the spans are added to
+     * @param xs    the entries
+     * @param st    style applied to each entry
+     */
     private void addList(List<Span> spans, List<String> xs, Style st) {
         for (int i = 0; i < xs.size(); i++) {
             if (i > 0) {

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

@@ -11,13 +11,26 @@ import java.util.Set;
  */
 public final class AsciiMap {
 
+    /** Lower bound for the room-name field width, in characters. */
     private static final int MIN_INNER = 7;   // minimum room name field width
+
+    /** Upper bound for the room-name field width, in characters. */
     private static final int MAX_INNER = 14;  // cap so the map stays compact
+
+    /** Width of a horizontal corridor, in characters. */
     private static final int GAP = 3;         // horizontal corridor width
 
+    /** Utility class; not instantiable. */
     private AsciiMap() {
     }
 
+    /**
+     * Renders the map as a styled grid of boxed rooms and corridor lines.
+     *
+     * @param view    the map snapshot to draw
+     * @param unicode true for box-drawing characters, false for pure ASCII
+     * @return the rendered grid, or a placeholder when the map is empty
+     */
     public static StyledText render(MapView view, boolean unicode) {
         if (view.cells().isEmpty()) {
             return StyledText.of("(no map yet)");
@@ -98,6 +111,13 @@ public final class AsciiMap {
         return b.build();
     }
 
+    /**
+     * Appends the text in the style that matches the cell's fog-of-war state.
+     *
+     * @param b     the builder to append to
+     * @param s     the text
+     * @param state the cell's state
+     */
     private static void styled(StyledText.Builder b, String s, CellState state) {
         switch (state) {
             case CURRENT -> b.heading(s);
@@ -106,6 +126,11 @@ public final class AsciiMap {
         }
     }
 
+    /**
+     * @param c     the cell
+     * @param inner width of the name field, in characters
+     * @return the room name, truncated to {@code inner}
+     */
     private static String label(RoomCell c, int inner) {
         String n = c.name();
         if (n.length() > inner) {
@@ -114,6 +139,11 @@ public final class AsciiMap {
         return n;
     }
 
+    /**
+     * @param s     the text
+     * @param width target width, at least the text's length
+     * @return the text padded with spaces so it sits centred in {@code width}
+     */
     private static String center(String s, int width) {
         int total = width - s.length();
         int left = total / 2;
@@ -121,6 +151,11 @@ public final class AsciiMap {
         return " ".repeat(left) + s + " ".repeat(right);
     }
 
+    /**
+     * @param x column on the grid
+     * @param y row on the grid
+     * @return the two coordinates packed into one map/set key
+     */
     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

@@ -3,10 +3,16 @@ package thb.jeanluc.adventure.io.text;
 /** Builds styled banners for big moments (game start, finale). */
 public final class Banner {
 
+    /** Utility class; not instantiable. */
     private Banner() {
     }
 
-    /** A framed, heading-styled welcome banner for the given title. */
+    /**
+     * A framed, heading-styled welcome banner for the given title.
+     *
+     * @param title the game title to frame
+     * @return the banner
+     */
     public static StyledText welcome(String title) {
         String bar = "=".repeat(Math.max(8, title.length() + 8));
         return StyledText.builder()

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

@@ -1,4 +1,14 @@
 package thb.jeanluc.adventure.io.text;
 
 /** Fog-of-war state of a room on the map. */
-public enum CellState { CURRENT, VISITED, KNOWN }
+public enum CellState {
+
+    /** The room the player is standing in. */
+    CURRENT,
+
+    /** A room the player has already entered. */
+    VISITED,
+
+    /** A room that is only known as the neighbour of a visited room, never entered. */
+    KNOWN
+}

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

@@ -1,4 +1,9 @@
 package thb.jeanluc.adventure.io.text;
 
-/** A corridor between two placed rooms. */
+/**
+ * A corridor between two placed rooms.
+ *
+ * @param from cell the corridor starts at
+ * @param to   cell the corridor leads to
+ */
 public record Connection(RoomCell from, RoomCell to) {}

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

@@ -1,4 +1,11 @@
 package thb.jeanluc.adventure.io.text;
 
-/** Status snapshot for the HUD region. */
+/**
+ * Status snapshot for the HUD region.
+ *
+ * @param location display name of the room the player is in
+ * @param gold     gold currently carried by the player
+ * @param turn     number of turns played so far
+ * @param lightOn  whether the player carries an active light source
+ */
 public record Hud(String location, int gold, int turn, boolean lightOn) {}

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

@@ -2,8 +2,14 @@ package thb.jeanluc.adventure.io.text;
 
 import java.util.List;
 
-/** Frontend-agnostic snapshot of the visible map: placed cells + connections. */
+/**
+ * Frontend-agnostic snapshot of the visible map: placed cells + connections.
+ *
+ * @param cells       the rooms the player knows about, placed on the grid
+ * @param connections the corridors between those rooms
+ */
 public record MapView(List<RoomCell> cells, List<Connection> connections) {
+    /** Defensively copies both lists, making the snapshot immutable. */
     public MapView {
         cells = List.copyOf(cells);
         connections = List.copyOf(connections);

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

@@ -1,4 +1,9 @@
 package thb.jeanluc.adventure.io.text;
 
-/** An active quest's title and its current objective. */
+/**
+ * An active quest's title and its current objective.
+ *
+ * @param title     display name of the quest
+ * @param objective description of the step the player has to complete next
+ */
 public record QuestEntry(String title, String objective) {}

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

@@ -3,9 +3,17 @@ package thb.jeanluc.adventure.io.text;
 /** Renders a {@link QuestView} as styled text for the console quest log. */
 public final class QuestText {
 
+    /** Utility class; not instantiable. */
     private QuestText() {
     }
 
+    /**
+     * Renders the quest log: active quests with their objective, then the
+     * completed titles.
+     *
+     * @param view the quest snapshot to render
+     * @return the rendered log, or a placeholder when there are no quests
+     */
     public static StyledText render(QuestView view) {
         if (view.active().isEmpty() && view.completed().isEmpty()) {
             return StyledText.of("You have no quests yet.");

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

@@ -2,8 +2,14 @@ package thb.jeanluc.adventure.io.text;
 
 import java.util.List;
 
-/** Frontend-agnostic snapshot of the quest log. */
+/**
+ * Frontend-agnostic snapshot of the quest log.
+ *
+ * @param active    quests in progress, with their current objective
+ * @param completed titles of the quests already finished
+ */
 public record QuestView(List<QuestEntry> active, List<String> completed) {
+    /** Defensively copies both lists, making the snapshot immutable. */
     public QuestView {
         active = List.copyOf(active);
         completed = List.copyOf(completed);

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

@@ -5,10 +5,16 @@ import java.util.List;
 /** Default, layout-free rendering of high-level views into {@link StyledText}. */
 public final class Renderings {
 
+    /** Utility class; not instantiable. */
     private Renderings() {
     }
 
-    /** Generic room rendering used by non-overriding {@code GameIO}s (e.g. tests). */
+    /**
+     * Generic room rendering used by non-overriding {@code GameIO}s (e.g. tests).
+     *
+     * @param r the room snapshot to render
+     * @return name, description, items, NPCs and exits as styled text
+     */
     public static StyledText roomToStyledText(RoomView r) {
         StyledText.Builder b = StyledText.builder();
         b.heading(r.name()).plain("\n");
@@ -33,6 +39,13 @@ public final class Renderings {
         return b.build();
     }
 
+    /**
+     * Appends the entries as a comma-separated list in the given style.
+     *
+     * @param b  the builder to append to
+     * @param xs the entries
+     * @param st style applied to each entry
+     */
     private static void appendList(StyledText.Builder b, List<String> xs, Style st) {
         for (int i = 0; i < xs.size(); i++) {
             if (i > 0) {

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

@@ -1,4 +1,12 @@
 package thb.jeanluc.adventure.io.text;
 
-/** A room placed on the map grid at integer coords, with its fog-of-war state. */
+/**
+ * A room placed on the map grid at integer coords, with its fog-of-war state.
+ *
+ * @param id    unique slug of the room
+ * @param name  display name shown inside the cell
+ * @param x     column on the map grid, 0-based
+ * @param y     row on the map grid, 0-based
+ * @param state how much the player knows about this room
+ */
 public record RoomCell(String id, String name, int x, int y, CellState state) {}

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

@@ -2,9 +2,18 @@ package thb.jeanluc.adventure.io.text;
 
 import java.util.List;
 
-/** Semantic snapshot of a room for rendering. Display-ready strings, no layout. */
+/**
+ * Semantic snapshot of a room for rendering. Display-ready strings, no layout.
+ *
+ * @param name        display name of the room
+ * @param description room description text
+ * @param items       display names of the items visible in the room
+ * @param npcs        display names of the NPCs present in the room
+ * @param exits       directions the player can leave by
+ */
 public record RoomView(String name, String description,
                        List<String> items, List<String> npcs, List<String> exits) {
+    /** Defensively copies the lists, making the snapshot immutable. */
     public RoomView {
         items = List.copyOf(items);
         npcs = List.copyOf(npcs);

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

@@ -1,7 +1,17 @@
 package thb.jeanluc.adventure.io.text;
 
-/** A run of text carrying a single semantic {@link Style}. */
+/**
+ * A run of text carrying a single semantic {@link Style}.
+ *
+ * @param text  the text of this run; never null
+ * @param style the semantic role applied to the whole run; never null
+ */
 public record Span(String text, Style style) {
+    /**
+     * Rejects null components.
+     *
+     * @throws IllegalArgumentException if {@code text} or {@code style} is null
+     */
     public Span {
         if (text == null) {
             throw new IllegalArgumentException("text must not be null");

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

@@ -1,4 +1,26 @@
 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 }
+public enum Style {
+
+    /** Body text without emphasis. */
+    PLAIN,
+
+    /** Titles and section headers. */
+    HEADING,
+
+    /** Item names. */
+    ITEM,
+
+    /** NPC names. */
+    NPC,
+
+    /** Exit directions and room links. */
+    EXIT,
+
+    /** Warnings, failures and threats. */
+    DANGER,
+
+    /** Secondary text of lower importance, e.g. the HUD line or echoed input. */
+    DIM
+}

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

@@ -6,18 +6,30 @@ import java.util.List;
 /** An ordered, immutable list of styled {@link Span}s. Built via {@link Builder}. */
 public final class StyledText {
 
+    /** The spans of this text, in output order; unmodifiable. */
     private final List<Span> spans;
 
+    /**
+     * @param spans the spans to copy into this text
+     */
     private StyledText(List<Span> spans) {
         this.spans = List.copyOf(spans);
     }
 
-    /** @return the spans in order (unmodifiable). */
+    /**
+     * Exposes the spans for rendering.
+     *
+     * @return the spans in order (unmodifiable)
+     */
     public List<Span> spans() {
         return spans;
     }
 
-    /** @return all span text concatenated, without any styling. */
+    /**
+     * Flattens this text for frontends that cannot render styles.
+     *
+     * @return all span text concatenated, without any styling
+     */
     public String plainText() {
         StringBuilder sb = new StringBuilder();
         for (Span s : spans) {
@@ -26,32 +38,104 @@ public final class StyledText {
         return sb.toString();
     }
 
-    /** @return a styled text of a single {@link Style#PLAIN} span. */
+    /**
+     * Wraps an unstyled string.
+     *
+     * @param s the text
+     * @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)));
     }
 
+    /**
+     * Starts assembling a styled text span by span.
+     *
+     * @return a new, empty builder
+     */
     public static Builder builder() {
         return new Builder();
     }
 
     /** Fluent builder; one method per {@link Style} role. */
     public static final class Builder {
+
+        /** Spans collected so far, in the order the append methods were called. */
         private final List<Span> spans = new ArrayList<>();
 
+        /**
+         * Appends one span.
+         *
+         * @param text  the text to append
+         * @param style the role to apply to it
+         * @return this builder
+         */
         private Builder add(String text, Style style) {
             spans.add(new Span(text, style));
             return this;
         }
 
+        /**
+         * Appends a span in the {@link Style#PLAIN} role.
+         *
+         * @param s text to append as {@link Style#PLAIN}
+         * @return this builder
+         */
         public Builder plain(String s)   { return add(s, Style.PLAIN); }
+
+        /**
+         * Appends a span in the {@link Style#HEADING} role.
+         *
+         * @param s text to append as {@link Style#HEADING}
+         * @return this builder
+         */
         public Builder heading(String s) { return add(s, Style.HEADING); }
+
+        /**
+         * Appends a span in the {@link Style#ITEM} role.
+         *
+         * @param s text to append as {@link Style#ITEM}
+         * @return this builder
+         */
         public Builder item(String s)    { return add(s, Style.ITEM); }
+
+        /**
+         * Appends a span in the {@link Style#NPC} role.
+         *
+         * @param s text to append as {@link Style#NPC}
+         * @return this builder
+         */
         public Builder npc(String s)     { return add(s, Style.NPC); }
+
+        /**
+         * Appends a span in the {@link Style#EXIT} role.
+         *
+         * @param s text to append as {@link Style#EXIT}
+         * @return this builder
+         */
         public Builder exit(String s)    { return add(s, Style.EXIT); }
+
+        /**
+         * Appends a span in the {@link Style#DANGER} role.
+         *
+         * @param s text to append as {@link Style#DANGER}
+         * @return this builder
+         */
         public Builder danger(String s)  { return add(s, Style.DANGER); }
+
+        /**
+         * Appends a span in the {@link Style#DIM} role.
+         *
+         * @param s text to append as {@link Style#DIM}
+         * @return this builder
+         */
         public Builder dim(String s)     { return add(s, Style.DIM); }
 
+        /**
+         * Finishes the build; the builder may not be reused meaningfully afterwards.
+         *
+         * @return an immutable styled text of the collected spans
+         */
         public StyledText build() {
             return new StyledText(spans);
         }

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

@@ -0,0 +1,71 @@
+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 {
+
+    /** Utility class; not instantiable. */
+    private CombinationFactory() {
+    }
+
+    /**
+     * Builds a combination and checks every referenced item id against the registry.
+     *
+     * @param dto   data read from {@code combinations.yaml}; must not be null
+     * @param items the global item registry
+     * @return the freshly built combination
+     * @throws WorldLoadException if an item id is missing, unknown, or both
+     *                            ingredients are the same item
+     */
+    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());
+    }
+
+    /**
+     * Asserts that {@code id} is present and known to the item registry.
+     *
+     * @param items the global item registry
+     * @param id    the item id to check
+     * @param field name of the DTO field, used in the error message
+     * @throws WorldLoadException if the id is null or unknown
+     */
+    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

@@ -7,9 +7,17 @@ import thb.jeanluc.adventure.model.Ending;
 /** Builds {@link Ending} objects from {@link EndingDto}s. */
 public final class EndingFactory {
 
+    /** Utility class; not instantiable. */
     private EndingFactory() {
     }
 
+    /**
+     * Builds an ending, defaulting a null {@code victory} flag to false.
+     *
+     * @param dto data read from {@code endings.yaml}; must not be null
+     * @return the freshly built ending
+     * @throws WorldLoadException if a condition sets none of its fields
+     */
     public static Ending fromDto(EndingDto dto) {
         return new Ending(
                 dto.id(),

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

@@ -13,6 +13,7 @@ import thb.jeanluc.adventure.model.item.SwitchableItem;
  */
 public final class ItemFactory {
 
+    /** Utility class; not instantiable. */
     private ItemFactory() {
     }
 
@@ -31,6 +32,7 @@ public final class ItemFactory {
                     .name(dto.name())
                     .description(dto.description())
                     .light(Boolean.TRUE.equals(dto.light()))
+                    .fixed(Boolean.TRUE.equals(dto.fixed()))
                     .build();
             case "readable" -> ReadableItem.builder()
                     .id(dto.id())
@@ -38,6 +40,7 @@ public final class ItemFactory {
                     .description(dto.description())
                     .readText(dto.readText())
                     .light(Boolean.TRUE.equals(dto.light()))
+                    .fixed(Boolean.TRUE.equals(dto.fixed()))
                     .build();
             case "switchable" -> SwitchableItem.builder()
                     .id(dto.id())
@@ -48,6 +51,7 @@ public final class ItemFactory {
                     .offText(dto.offText())
                     .effects(thb.jeanluc.adventure.loader.dto.EffectDto.toModelList(dto.effects()))
                     .light(Boolean.TRUE.equals(dto.light()))
+                    .fixed(Boolean.TRUE.equals(dto.fixed()))
                     .build();
             default -> throw new WorldLoadException(
                     "Unknown item type '" + dto.type() + "' on item '" + dto.id() + "'");

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

@@ -9,6 +9,7 @@ import thb.jeanluc.adventure.model.Npc;
  */
 public final class NpcFactory {
 
+    /** Utility class; not instantiable. */
     private NpcFactory() {
     }
 

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

@@ -13,9 +13,17 @@ import java.util.List;
 /** Builds {@link Quest} objects from {@link QuestDto}s (no reference resolution needed). */
 public final class QuestFactory {
 
+    /** Utility class; not instantiable. */
     private QuestFactory() {
     }
 
+    /**
+     * Builds a quest including all of its stages.
+     *
+     * @param dto data read from {@code quests.yaml}; must not be null
+     * @return the freshly built quest
+     * @throws WorldLoadException if a condition or effect sets none of its fields
+     */
     public static Quest fromDto(QuestDto dto) {
         List<QuestStage> stages = new ArrayList<>();
         if (dto.stages() != null) {

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

@@ -9,6 +9,7 @@ import thb.jeanluc.adventure.model.Room;
  */
 public final class RoomFactory {
 
+    /** Utility class; not instantiable. */
     private RoomFactory() {
     }
 
@@ -21,6 +22,7 @@ public final class RoomFactory {
     public static Room shellFromDto(RoomDto dto) {
         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 +1,78 @@
+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";
+
+    /** Single Jackson mapper, configured once for YAML input. */
+    private final ObjectMapper yaml = new ObjectMapper(new YAMLFactory());
+
+    /** Classpath base directory (typically {@link #DEFAULT_BASE} or a test override). */
+    private final String basePath;
+
+    /** Convenience constructor using {@link #DEFAULT_BASE}. */
+    public TutorialLoader() {
+        this(DEFAULT_BASE);
+    }
+
+    /**
+     * Creates a loader reading from the given classpath base directory.
+     *
+     * @param basePath classpath base directory holding {@code tutorial.yaml}
+     */
+    public TutorialLoader(String basePath) {
+        this.basePath = basePath;
+    }
+
+    /**
+     * Reads the tutorial; absent file → {@link Tutorial#none()}.
+     *
+     * @return the parsed tutorial, or {@link Tutorial#none()} if the file is
+     *         missing or empty
+     * @throws WorldLoadException if the file exists but cannot be parsed
+     */
+    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

@@ -5,12 +5,14 @@ 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;
@@ -75,6 +77,8 @@ public class WorldLoader {
         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());
@@ -104,23 +108,42 @@ public class WorldLoader {
             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);
         resolver.resolveNpcs(npcDtos);
 
-        new WorldValidator(items, npcs, rooms, gameDto).validate();
+        new WorldValidator(items, npcs, rooms, gameDto, quests, endings, combinations).validate();
 
         Room start = rooms.get(gameDto.startRoom());
         int gold = gameDto.startGold() == null ? 0 : gameDto.startGold();
         Player player = new Player(start, gold);
 
         World world = new World(rooms, items, npcs,
-                gameDto.title(), gameDto.welcomeMessage(), quests, endings);
+                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);
     }
 
+    /**
+     * Reads a required YAML list resource.
+     *
+     * @param <T>         element type
+     * @param resource    classpath path of the YAML file
+     * @param elementType class of the list elements
+     * @return the parsed elements, empty if the document is blank
+     * @throws WorldLoadException if the resource is missing or unparsable
+     */
     private <T> List<T> readList(String resource, Class<T> elementType) {
         try (InputStream in = openResource(resource)) {
             CollectionType type = yaml.getTypeFactory().constructCollectionType(List.class, elementType);
@@ -131,6 +154,15 @@ public class WorldLoader {
         }
     }
 
+    /**
+     * Reads an optional YAML list resource.
+     *
+     * @param <T>         element type
+     * @param resource    classpath path of the YAML file
+     * @param elementType class of the list elements
+     * @return the parsed elements, empty if the resource is absent or blank
+     * @throws WorldLoadException if the resource exists but is unparsable
+     */
     private <T> List<T> readListOptional(String resource, Class<T> elementType) {
         try (InputStream in = getClass().getResourceAsStream(resource)) {
             if (in == null) {
@@ -144,6 +176,15 @@ public class WorldLoader {
         }
     }
 
+    /**
+     * Reads a required YAML resource holding a single object.
+     *
+     * @param <T>      target type
+     * @param resource classpath path of the YAML file
+     * @param type     class to deserialize into
+     * @return the parsed object
+     * @throws WorldLoadException if the resource is missing or unparsable
+     */
     private <T> T readSingle(String resource, Class<T> type) {
         try (InputStream in = openResource(resource)) {
             return yaml.readValue(in, type);
@@ -152,6 +193,13 @@ public class WorldLoader {
         }
     }
 
+    /**
+     * Opens a classpath resource.
+     *
+     * @param resource classpath path of the resource
+     * @return an open stream; the caller closes it
+     * @throws WorldLoadException if the resource is not on the classpath
+     */
     private InputStream openResource(String resource) {
         InputStream in = getClass().getResourceAsStream(resource);
         if (in == null) {
@@ -160,6 +208,13 @@ public class WorldLoader {
         return in;
     }
 
+    /**
+     * Asserts that no id occurs twice.
+     *
+     * @param kind label of the entity type, used in the error message
+     * @param ids  the ids to check
+     * @throws WorldLoadException on the first duplicate id
+     */
     private void requireUniqueIds(String kind, List<String> ids) {
         for (int i = 0; i < ids.size(); i++) {
             for (int j = i + 1; j < ids.size(); j++) {

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

@@ -1,19 +1,32 @@
 package thb.jeanluc.adventure.loader;
 
-import lombok.RequiredArgsConstructor;
 import thb.jeanluc.adventure.loader.dto.GameDto;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.Condition;
+import thb.jeanluc.adventure.model.Effect;
+import thb.jeanluc.adventure.model.Ending;
 import thb.jeanluc.adventure.model.Npc;
+import thb.jeanluc.adventure.model.Quest;
+import thb.jeanluc.adventure.model.QuestStage;
 import thb.jeanluc.adventure.model.Room;
 import thb.jeanluc.adventure.model.item.Item;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
 import java.util.Map;
 import java.util.regex.Pattern;
 
 /**
  * Phase 4 of the loading pipeline. Walks the fully wired world and
  * checks the invariants documented in {@code yaml-schemas.md}.
+ *
+ * <p>Every reference an id can point at is resolved here — item ids in
+ * conditions, effects and recipes, quest ids in {@code START_QUEST} — so a
+ * typo in the world files fails at load time with a precise message rather
+ * than silently soft-locking a quest or throwing an NPE mid-game. All
+ * problems found are reported together, not one per run.
  */
-@RequiredArgsConstructor
 public class WorldValidator {
 
     /** Regex every entity id must match. */
@@ -31,44 +44,216 @@ public class WorldValidator {
     /** Loaded game.yaml whose {@code startRoom} must exist. */
     private final GameDto gameDto;
 
+    /** Quest registry; quest ids are the targets of {@code START_QUEST} effects. */
+    private final Map<String, Quest> quests;
+
+    /** Endings whose trigger conditions must reference known items. */
+    private final List<Ending> endings;
+
+    /** Combination recipes, keyed by item pair. */
+    private final Map<String, Combination> combinations;
+
+    /** Problems found so far; all are reported in one exception. */
+    private final List<String> problems = new ArrayList<>();
+
     /**
-     * Runs every validation rule.
+     * Full constructor covering every entity kind in the world.
      *
-     * @throws WorldLoadException on the first failure
+     * @param items        item registry
+     * @param npcs         NPC registry
+     * @param rooms        room registry
+     * @param gameDto      loaded {@code game.yaml}
+     * @param quests       quest registry
+     * @param endings      loaded endings
+     * @param combinations recipe registry, keyed by {@link Combination#key()}
+     */
+    public WorldValidator(Map<String, Item> items,
+                          Map<String, Npc> npcs,
+                          Map<String, Room> rooms,
+                          GameDto gameDto,
+                          Map<String, Quest> quests,
+                          List<Ending> endings,
+                          Map<String, Combination> combinations) {
+        this.items = items;
+        this.npcs = npcs;
+        this.rooms = rooms;
+        this.gameDto = gameDto;
+        this.quests = quests;
+        this.endings = endings;
+        this.combinations = combinations;
+    }
+
+    /**
+     * Convenience constructor for a world without quests, endings or recipes.
+     *
+     * @param items   item registry
+     * @param npcs    NPC registry
+     * @param rooms   room registry
+     * @param gameDto loaded {@code game.yaml}
+     */
+    public WorldValidator(Map<String, Item> items,
+                          Map<String, Npc> npcs,
+                          Map<String, Room> rooms,
+                          GameDto gameDto) {
+        this(items, npcs, rooms, gameDto, Map.of(), List.of(), Map.of());
+    }
+
+    /**
+     * Runs every validation rule and reports all problems at once.
+     *
+     * @throws WorldLoadException if any rule fails
      */
     public void validate() {
         validateIds();
         validateStartRoom();
         validateGreetings();
+        validateRequiredText();
+        validateQuests();
+        validateEndings();
+        validateCombinations();
+
+        if (!problems.isEmpty()) {
+            throw new WorldLoadException("Invalid world:\n  - " + String.join("\n  - ", problems));
+        }
     }
 
     private void validateIds() {
         items.keySet().forEach(this::requireValidId);
         npcs.keySet().forEach(this::requireValidId);
         rooms.keySet().forEach(this::requireValidId);
+        quests.keySet().forEach(this::requireValidId);
     }
 
     private void requireValidId(String id) {
         if (id == null || !ID_PATTERN.matcher(id).matches()) {
-            throw new WorldLoadException("Invalid id '" + id + "': must match " + ID_PATTERN);
+            problems.add("Invalid id '" + id + "': must match " + ID_PATTERN);
         }
     }
 
     private void validateStartRoom() {
         if (gameDto == null || gameDto.startRoom() == null) {
-            throw new WorldLoadException("game.yaml is missing 'startRoom'");
+            problems.add("game.yaml is missing 'startRoom'");
+            return;
         }
         if (!rooms.containsKey(gameDto.startRoom())) {
-            throw new WorldLoadException(
+            problems.add("game.yaml.startRoom '" + gameDto.startRoom()
-                    "game.yaml.startRoom '" + gameDto.startRoom() + "' does not match any room");
+                    + "' does not match any room");
         }
     }
 
     private void validateGreetings() {
         for (Npc npc : npcs.values()) {
-            if (npc.getGreeting() == null || npc.getGreeting().isBlank()) {
+            if (isBlank(npc.getGreeting())) {
-                throw new WorldLoadException("NPC '" + npc.getId() + "' has an empty greeting");
+                problems.add("NPC '" + npc.getId() + "' has an empty greeting");
             }
         }
     }
+
+    /**
+     * Names and descriptions are rendered unconditionally by the IO layer, so a
+     * missing one is an NPE waiting to happen the moment the player walks in.
+     */
+    private void validateRequiredText() {
+        for (Room room : rooms.values()) {
+            if (isBlank(room.getName())) {
+                problems.add("Room '" + room.getId() + "' is missing 'name'");
+            }
+            if (isBlank(room.getDescription())) {
+                problems.add("Room '" + room.getId() + "' is missing 'description'");
+            }
+        }
+        for (Item item : items.values()) {
+            if (isBlank(item.getName())) {
+                problems.add("Item '" + item.getId() + "' is missing 'name'");
+            }
+            if (isBlank(item.getDescription())) {
+                problems.add("Item '" + item.getId() + "' is missing 'description'");
+            }
+        }
+    }
+
+    private void validateQuests() {
+        for (Quest quest : quests.values()) {
+            String where = "quest '" + quest.id() + "'";
+            if (isBlank(quest.title())) {
+                problems.add(where + " is missing 'title'");
+            }
+            if (quest.stages().isEmpty()) {
+                problems.add(where + " has no stages");
+            }
+            checkEffects(quest.onComplete(), where + " onComplete");
+            for (int i = 0; i < quest.stages().size(); i++) {
+                QuestStage stage = quest.stages().get(i);
+                String stageWhere = where + " stage " + i;
+                if (isBlank(stage.objective())) {
+                    problems.add(stageWhere + " is missing 'objective'");
+                }
+                checkConditions(stage.completion(), stageWhere + " completion");
+                checkEffects(stage.onComplete(), stageWhere + " onComplete");
+            }
+        }
+    }
+
+    private void validateEndings() {
+        for (Ending ending : endings) {
+            String where = "ending '" + ending.id() + "'";
+            requireValidId(ending.id());
+            if (isBlank(ending.text())) {
+                problems.add(where + " is missing 'text'");
+            }
+            checkConditions(ending.when(), where + " when");
+        }
+    }
+
+    private void validateCombinations() {
+        for (Combination c : combinations.values()) {
+            String where = "combination '" + c.key() + "'";
+            requireKnownItem(c.a(), where + " operand 'a'");
+            requireKnownItem(c.b(), where + " operand 'b'");
+            if (c.produce() != null) {
+                requireKnownItem(c.produce(), where + " 'produce'");
+            }
+            for (String id : c.consume()) {
+                requireKnownItem(id, where + " 'consume'");
+            }
+            checkConditions(c.requires(), where + " requires");
+            checkEffects(c.effects(), where + " effects");
+        }
+    }
+
+    /** Resolves the item ids referenced by {@code HAS_ITEM} conditions. */
+    private void checkConditions(Collection<Condition> conditions, String where) {
+        for (Condition c : conditions) {
+            if (c.type() == Condition.Type.HAS_ITEM) {
+                requireKnownItem(c.arg(), where);
+            }
+        }
+    }
+
+    /** Resolves the item and quest ids referenced by effects. */
+    private void checkEffects(Collection<Effect> effects, String where) {
+        for (Effect e : effects) {
+            switch (e.type()) {
+                case GIVE_ITEM, REMOVE_ITEM -> requireKnownItem(e.arg(), where);
+                case START_QUEST -> {
+                    if (!quests.containsKey(e.arg())) {
+                        problems.add(where + " starts unknown quest '" + e.arg() + "'");
+                    }
+                }
+                default -> {
+                    // SET_FLAG / CLEAR_FLAG / SAY carry free-form text.
+                }
+            }
+        }
+    }
+
+    private void requireKnownItem(String id, String where) {
+        if (!items.containsKey(id)) {
+            problems.add(where + " references unknown item '" + id + "'");
+        }
+    }
+
+    private static boolean isBlank(String s) {
+        return s == null || s.isBlank();
+    }
 }

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

@@ -0,0 +1,27 @@
+package thb.jeanluc.adventure.loader.dto;
+
+import java.util.List;
+
+/**
+ * YAML representation of an item-combination recipe.
+ *
+ * @param a        id of the first ingredient item
+ * @param b        id of the second ingredient item
+ * @param requires conditions that must hold for the recipe to apply; nullable
+ * @param consume  ids of the items removed from the inventory on success; nullable
+ * @param produce  id of the item handed to the player on success; nullable
+ * @param effects  effects applied on success; nullable
+ * @param response text printed on success
+ * @param failText text printed when the required conditions are not met; nullable
+ */
+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

@@ -6,9 +6,21 @@ import thb.jeanluc.adventure.model.Condition;
 import java.util.ArrayList;
 import java.util.List;
 
-/** YAML condition: exactly one of the fields is set. */
+/**
+ * YAML condition: exactly one of the fields is set.
+ *
+ * @param flag    name of a flag that must be set; nullable
+ * @param notFlag name of a flag that must not be set; nullable
+ * @param hasItem id of an item the player must carry; nullable
+ */
 public record ConditionDto(String flag, String notFlag, String hasItem) {
 
+    /**
+     * Converts this DTO into its domain condition.
+     *
+     * @return the matching {@link Condition}
+     * @throws WorldLoadException if none of the fields is set
+     */
     public Condition toModel() {
         if (flag != null) {
             return new Condition(Condition.Type.FLAG, flag);
@@ -22,6 +34,13 @@ public record ConditionDto(String flag, String notFlag, String hasItem) {
         throw new WorldLoadException("Condition must set one of flag/notFlag/hasItem");
     }
 
+    /**
+     * Converts a list of DTOs into domain conditions.
+     *
+     * @param dtos the DTOs to convert; null is treated as empty
+     * @return the converted conditions, never null
+     * @throws WorldLoadException if any DTO sets none of its fields
+     */
     public static List<Condition> toModelList(List<ConditionDto> dtos) {
         List<Condition> out = new ArrayList<>();
         if (dtos != null) {

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

@@ -2,6 +2,11 @@ package thb.jeanluc.adventure.loader.dto;
 
 import java.util.List;
 
-/** YAML representation of a conditional room description. */
+/**
+ * YAML representation of a conditional room description.
+ *
+ * @param when conditions that must all hold for this variant to be used
+ * @param text description text used instead of the room's default
+ */
 public record DescriptionStateDto(List<ConditionDto> when, String text) {
 }

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

@@ -2,6 +2,11 @@ package thb.jeanluc.adventure.loader.dto;
 
 import java.util.List;
 
-/** YAML representation of a conditional NPC line. */
+/**
+ * YAML representation of a conditional NPC line.
+ *
+ * @param when conditions that must all hold for this line to be spoken
+ * @param text text the NPC says
+ */
 public record DialogueLineDto(List<ConditionDto> when, String text) {
 }

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

@@ -6,15 +6,38 @@ import thb.jeanluc.adventure.model.Effect;
 import java.util.ArrayList;
 import java.util.List;
 
-/** YAML effect: exactly one of the fields is set. */
+/**
+ * YAML effect: exactly one of the fields is set.
+ *
+ * @param setFlag    name of a flag to set; nullable
+ * @param clearFlag  name of a flag to clear; nullable
+ * @param giveItem   id of an item to add to the inventory; nullable
+ * @param removeItem id of an item to take from the inventory; nullable
+ * @param say        text to print; nullable
+ * @param startQuest id of a quest to start; nullable
+ */
 public record EffectDto(String setFlag, String clearFlag, String giveItem, String removeItem,
                         String say, String startQuest) {
 
-    /** Backward-compatible constructor without startQuest. */
+    /**
+     * Backward-compatible constructor without startQuest.
+     *
+     * @param setFlag    name of a flag to set; nullable
+     * @param clearFlag  name of a flag to clear; nullable
+     * @param giveItem   id of an item to add to the inventory; nullable
+     * @param removeItem id of an item to take from the inventory; nullable
+     * @param say        text to print; nullable
+     */
     public EffectDto(String setFlag, String clearFlag, String giveItem, String removeItem, String say) {
         this(setFlag, clearFlag, giveItem, removeItem, say, null);
     }
 
+    /**
+     * Converts this DTO into its domain effect.
+     *
+     * @return the matching {@link Effect}
+     * @throws WorldLoadException if none of the fields is set
+     */
     public Effect toModel() {
         if (setFlag != null) {
             return new Effect(Effect.Type.SET_FLAG, setFlag);
@@ -38,6 +61,13 @@ public record EffectDto(String setFlag, String clearFlag, String giveItem, Strin
                 "Effect must set one of setFlag/clearFlag/giveItem/removeItem/say/startQuest");
     }
 
+    /**
+     * Converts a list of DTOs into domain effects.
+     *
+     * @param dtos the DTOs to convert; null is treated as empty
+     * @return the converted effects, never null
+     * @throws WorldLoadException if any DTO sets none of its fields
+     */
     public static List<Effect> toModelList(List<EffectDto> dtos) {
         List<Effect> out = new ArrayList<>();
         if (dtos != null) {

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

@@ -2,6 +2,14 @@ package thb.jeanluc.adventure.loader.dto;
 
 import java.util.List;
 
-/** YAML representation of a game ending. */
+/**
+ * YAML representation of a game ending.
+ *
+ * @param id      unique slug
+ * @param title   display title of the ending
+ * @param victory whether this ending counts as a win; defaults to false if null
+ * @param when    conditions that must all hold for this ending to trigger
+ * @param text    text printed when the ending triggers
+ */
 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

@@ -2,6 +2,12 @@ package thb.jeanluc.adventure.loader.dto;
 
 import java.util.List;
 
-/** YAML representation of a single condition-gated exit. */
+/**
+ * YAML representation of a single condition-gated exit.
+ *
+ * @param direction name of the gated exit direction
+ * @param requires  conditions that must all hold for the exit to be passable
+ * @param blocked   text printed when the exit is used while still locked
+ */
 public record ExitLockDto(String direction, List<ConditionDto> requires, String blocked) {
 }

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

@@ -16,6 +16,7 @@ import java.util.List;
  * @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
+ * @param fixed        whether this item is scenery that cannot be taken; nullable
  */
 public record ItemDto(
         String type,
@@ -27,11 +28,24 @@ public record ItemDto(
         String onText,
         String offText,
         List<EffectDto> effects,
-        Boolean light
+        Boolean light,
+        Boolean fixed
 ) {
-    /** Backward-compatible constructor without effects/light. */
+    /**
+     * Backward-compatible constructor without effects/light/fixed, which default to null.
+     *
+     * @param type         discriminator: {@code plain | readable | switchable}
+     * @param id           unique slug
+     * @param name         display name
+     * @param description  examine description
+     * @param readText     text printed when a readable item is used
+     * @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
+     */
     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);
+        this(type, id, name, description, readText, initialState, onText, offText,
+                null, null, null);
     }
 }

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

@@ -20,7 +20,15 @@ public record NpcDto(
         List<ReactionDto> reactions,
         List<DialogueLineDto> dialogue
 ) {
-    /** Backward-compatible constructor without dialogue. */
+    /**
+     * Backward-compatible constructor without dialogue, which defaults to null.
+     *
+     * @param id          unique slug
+     * @param name        display name
+     * @param description examine description
+     * @param greeting    text the NPC says on {@code talk}
+     * @param reactions   list of trigger/response definitions; may be null
+     */
     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

@@ -2,7 +2,15 @@ package thb.jeanluc.adventure.loader.dto;
 
 import java.util.List;
 
-/** YAML representation of a quest. */
+/**
+ * YAML representation of a quest.
+ *
+ * @param id         unique slug
+ * @param title      display title
+ * @param autoStart  whether the quest starts with the game; defaults to false if null
+ * @param stages     ordered stages the player works through
+ * @param onComplete effects applied once the last stage is done; nullable
+ */
 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

@@ -2,6 +2,12 @@ package thb.jeanluc.adventure.loader.dto;
 
 import java.util.List;
 
-/** YAML representation of a quest stage. */
+/**
+ * YAML representation of a quest stage.
+ *
+ * @param objective  objective text shown in the quest log
+ * @param completion conditions that must all hold for the stage to be done
+ * @param onComplete effects applied when the stage completes; nullable
+ */
 public record QuestStageDto(String objective, List<ConditionDto> completion, List<EffectDto> onComplete) {
 }