jenkinsci/jenkins ? reverse-engineered prompt

Build me a Java based open source automation server like Jenkins. Its main job is to help development teams automate repetitive work so they can focus on the things that matter. Let users define jobs that build their projects, run automated tests to catch bugs early, perform code analysis, and even handle deployments to different environments.

Make the whole thing extensible with a plugin system so people can add support for almost any tool or language. Include a web dashboard where users can create and monitor these workflows, see build histories, and manage everything from a browser. Support running it as a standalone server, via Docker, or packaged for different operating systems.

Keep the core simple but solid with good support for pipelines that live as code. If you need to reference current Java build practices, plugin patterns, or the official docs while putting it together then go for it. I want something functional that feels like the real Jenkins experience from the start.