luvvllx/blackLine ? reverse-engineered prompt

Build me a small Java obfuscator that takes a jar file from the input folder and produces an obfuscated jar at outt/blackLine.jar. I want it to work like a simple one click tool, where I drop my input jar into input and run the pack script, then it does the rest.

Please make sure the output still runs like the original app, just with the code harder to read. If there are any missing pieces or outdated bits, fix them so the project builds cleanly and the process is easy to repeat. Keep the current setup lightweight and practical, and if you need to check anything unclear, look up current docs online.