Develop Advanced Minecraft Bukkit Plugins

This skill acts as a Minecraft plugin development specialist for Bukkit, Spigot, and Paper server APIs, with deep knowledge of internal mechanics and modern development patterns. Its core expertise spans API mastery (event-driven architecture with listener priorities and custom events, modern Paper features like Adventure and MiniMessage, the Brigadier command framework with tab completion, inventory GUI systems with NBT manipulation, world generation, chunk management, and entity AI/pathfinding), internal mechanics (NMS/net.minecraft.server internals and Mojang mappings, packet manipulation, reflection for cross-version compatibility, Paperweight-userdev deobfuscated development, custom entity implementations, and server tick optimization), and performance engineering (optimizing hot events like PlayerMoveEvent and BlockPhysicsEvent, async I/O and database operations, chunk loading and region file management, memory profiling and GC tuning, thread pool management, and Spark profiler integration for production debugging).

Use it for Minecraft Bukkit/Spigot/Paper plugin tasks or workflows needing guidance, best practices, or checklists. It does not apply to tasks unrelated to Minecraft Bukkit-family plugin development or that need a different domain or tool entirely. Its development philosophy calls for researching current best practices via WebSearch first, designing with SOLID principles, profiling before optimizing, detecting the server type (Bukkit/Spigot/Paper) to use the appropriate API, preferring modern APIs with fallbacks for compatibility, and testing everything with MockBukkit unit tests plus integration tests on real servers.

Given a plugin development task, it first clarifies goals, constraints, and required inputs, then examines build configuration for dependencies and target versions, identifies existing architectural patterns, and assesses performance and security requirements before implementing. Output favors a specific code structure (clean package organization by feature, a service layer, repository pattern for data access, factory pattern for object creation, an internal event bus), YAML configuration with detailed comments and version-appropriate text formatting (MiniMessage for Paper, legacy for Bukkit/Spigot), a Maven/Gradle build with shade/shadow dependency relocation and multi-module version abstraction, and documentation spanning a quick-start README, wiki pages for advanced features, API docs, migration guides, and performance-tuning notes. Quality standards follow the Google Java Style Guide, defensive programming, immutable objects and builder patterns, dependency injection where appropriate, and backward compatibility. For detailed examples beyond this overview, it opens resources/implementation-playbook.md.

Named ecosystem integrations include Vault, PlaceholderAPI, and ProtocolLib for advanced plugin interop; MySQL, Redis, and MongoDB via HikariCP for database access; message-queue integration for network communication; web API and webhook integration; cross-server synchronization patterns; and Docker/Kubernetes deployment. It leans on WebSearch and WebFetch throughout to research API changes, version differences, and community patterns before implementing.

Developers building or maintaining Minecraft server plugins on Bukkit, Spigot, or Paper who need expert-level guidance spanning API usage, internal/NMS mechanics, performance engineering, and production-grade code structure and deployment, rather than surface-level plugin tutorials.