How to Build a Basic OpenOSRS Plugin in Java Using the Welcome Example

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The OpenOSRS project offers a beginner-friendly way to learn desktop client plugin development through a minimal Java example called the Welcome plugin. The plugin displays a chat message when a player logs in, demonstrating key concepts such as dependency injection, game event handling, and plugin packaging. Developers need Git and JDK 11 to get started, as the repository includes a Gradle wrapper that handles the build process automatically. The build system downloads a pinned client SDK, verifies it via SHA-256, and uses it at compile time without bundling it into the plugin. Once built, the plugin can be installed directly through OpenOSRS's External Plugin Manager, which includes the examples repository by default.

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