chore: align ore drops and XP with vanilla 1.21 and add AGENTS.md guide
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felden.r@grenoble.archi.fr
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# Custom Ore Gem - Developer Guide for Agents
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This repository is a Minecraft **NeoForge 1.21.1** mod created with **MCreator**. Agents must follow these strict guidelines to ensure build stability and code preservation.
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## 1. Build & Test Commands
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Use the Gradle wrapper for all operations. Ensure you are using Java 21 (NeoForge 1.21.1 requirement).
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- **Build Mod:**
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```bash
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./gradlew build
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```
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- Generates the mod JAR in `build/libs/`.
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- Always run this after making changes to verify compilation.
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- **Run Client:**
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```bash
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./gradlew runClient
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```
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- **Run Server:**
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```bash
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./gradlew runServer
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```
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- **Run Data Generation:**
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```bash
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./gradlew runData
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```
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- This generates resources (blockstates, models, loot tables) into `src/generated/resources`.
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- **Run All Tests:**
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```bash
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./gradlew test
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```
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- **Run Single Test Class:**
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```bash
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./gradlew test --tests "net.mcreator.customoregen.OresCommandTest"
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```
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- **Run Single Test Method:**
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```bash
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./gradlew test --tests "net.mcreator.customoregen.OresCommandTest.testCommandRegistration_ShouldRegisterOresCommand"
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```
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- **Clean Project:**
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```bash
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./gradlew clean
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```
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## 2. MCreator & Code Preservation
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**CRITICAL:** This project is partially generated by MCreator.
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- **Generated Files:** Many files in `src/main/java` are regenerated on every build or MCreator export.
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- **User Code Blocks:** You **MUST** only edit code within designated user code blocks in these files.
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```java
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// Start of user code block [block_name]
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// ... YOUR CODE HERE ...
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// End of user code block [block_name]
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```
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- If a file does not have these blocks, assume it is **UNSAFE** to edit unless you created it yourself.
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- **Safe Files:**
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- Files strictly created by you (e.g., in `src/test/java`).
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- New utility classes or event handlers not managed by MCreator.
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- **Do NOT** directly modify the following unless inside a user block:
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- `CustomOreGenModBlocks.java`
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- `CustomOreGenModItems.java`
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- `CustomOreGenModTabs.java`
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- Any file in `net.mcreator.customoregen.procedures` (unless explicitly safe).
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## 3. Code Style & Conventions
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### Formatting
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- **Indentation:**
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- **Source Code (`src/main`):** Use **TABS** (default MCreator style).
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- **Tests (`src/test`):** Use **4 SPACES** (typical for JUnit tests).
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- **Consistency:** Always check the current file's indentation before editing.
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- **Encoding:** UTF-8.
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### Naming
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- **Classes:** PascalCase (e.g., `CustomOreGenMod`).
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- **Methods:** camelCase (e.g., `queueServerWork`).
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- **Constants:** UPPER_SNAKE_CASE (e.g., `MODID`, `COLD_BIOMES_TAG`).
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- **Fields:** camelCase (e.g., `workQueue`, `oreGenConfig`).
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- **Packages:** `net.mcreator.customoregen` (lowercase).
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### Imports
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- Group imports in this specific order:
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1. Java/Standard Libraries (`java.*`, `javax.*`)
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2. Third-party Libraries (e.g., `org.apache.logging.log4j.*`)
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3. Minecraft/NeoForge (`net.minecraft.*`, `net.neoforged.*`)
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4. Project Classes (`net.mcreator.customoregen.*`)
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- Avoid `import *` unless there are many imports from the same package (e.g., `java.util.*` is acceptable if heavily used, but explicit imports are preferred for clarity).
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### Logging
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- Use `LogManager.getLogger(Class.class)` for loggers.
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- Field name: `LOGGER`.
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- Log levels: Use `debug` for dev info, `info` for general status, `error` for exceptions.
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## 4. Architecture & Patterns
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- **Framework:** NeoForge 1.21.1 (Java 21).
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- **Registries:** Use `DeferredRegister` for all registries (Blocks, Items, Tabs, SoundEvents).
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- Example: `public static final DeferredRegister.Blocks REGISTRY = DeferredRegister.createBlocks(CustomOreGenMod.MODID);`
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- **Event Bus:**
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- The `@Mod` class registers the `IEventBus`.
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- Use `@SubscribeEvent` for event handling.
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- Event handlers often reside in `net.mcreator.customoregen.event` or static inner classes annotated with `@EventBusSubscriber`.
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- **Configuration:**
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- Located in `net.mcreator.customoregen.config.ModConfigs`.
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- Uses `ModConfig.Type.COMMON` built with `ModConfigSpec`.
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- Access configs via the public static fields (e.g., `ModConfigs.ORE_GEN.shardDiamondOreCount.get()`).
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- **Commands:**
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- Registered via `RegisterCommandsEvent`.
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- Use Brigadier (`CommandDispatcher`, `CommandContext`).
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- See `OresCommand.java` for the reference implementation.
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## 5. Testing Guidelines
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- **Framework:** JUnit 5 (Jupiter) + Mockito.
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- **Location:** `src/test/java`.
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- **Mocking Strategy:**
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- Since a full Minecraft environment is not available in unit tests, you **MUST** mock Minecraft classes.
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- Use `@ExtendWith(MockitoExtension.class)`.
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- Mock critical classes: `@Mock ServerPlayer player`, `@Mock Level level`, `@Mock BlockPos pos`.
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- Stub methods: `when(level.getBiome(pos)).thenReturn(biomeHolder);`.
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- **Assertions:** Use `org.junit.jupiter.api.Assertions` (e.g., `assertEquals`, `assertDoesNotThrow`).
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## 6. Common Tasks
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- **Adding a New Ore:**
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1. Create Block & Item (MCreator/Manual).
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2. Add JSONs: Loot Table, Configured Feature, Placed Feature, Biome Modifier.
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3. Register in `CustomOreGenModBlocks` and `CustomOreGenModItems`.
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4. Update `OresCommand.java` lists (e.g., `COLD_ORES`, `HOT_ORES`) to make it discoverable.
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5. Update `OreBreakEventHandler.java` if it has custom drops logic.
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6. Add to `ModConfigs.java` for generation parameters (vein size, count, etc.).
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- **Modifying Logic:**
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- Check `procedures/` for game logic (often MCreator generated).
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- Check `event/` for event-driven logic.
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- Always verify if logic changes need a corresponding test update.
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## 7. Safety & Verification
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- **Backups:** If you are unsure about MCreator regeneration, backup the file before editing.
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- **Verification:**
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- Always run `./gradlew build` after changes to ensure no compilation errors.
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- If you touch config files, ensure `ModConfigsTest` still passes.
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- If you touch commands, ensure `OresCommandTest` still passes.
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## 8. Directory Structure
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```
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src/
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├── main/
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│ ├── java/net/mcreator/customoregen/
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│ │ ├── block/ # Block definitions
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│ │ ├── config/ # Configuration classes
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│ │ ├── event/ # Event handlers
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│ │ ├── init/ # Registration (Blocks, Items, Tabs)
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│ │ ├── item/ # Item definitions
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│ │ └── procedures/ # Game logic procedures
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│ └── resources/ # Assets and data (textures, models, lang)
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└── test/
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└── java/net/mcreator/customoregen/ # Unit tests
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```
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